Merge branch 'main' of https://git.kraut.space/Krautspace/webseite-krautspace

veraenderungen auf dem server uebernommen

README.md

@@ -0,0 +1,15 @@
+# Webseite
+
+Das Repository enthält die Webseite das Vereins "Hackspace Jena". Der größte
+Teil der Webseite ist statisches HTML, ergänzt um einige dynamische
+Elemente zur Anzeige des Raumstatuses und der aktuellen Termine.
+
+## Installation
+
+Zum Betrieb der Webseite ist ist in Webserver und PHP notwendig. Die
+Auswertung der Termine erfolgt mittels der VObject Bibliothek von
+[https://sabre.io](https://sabre.io), welche auch in Nextcloud enthalten
+ist. Debian stellt die Bibliothe in dem Paket php-sabre-vobject bereit. Nach
+der Installation und Konfiguration des Websevers inklusive PHP wird das Repo
+in das Dokumentroot des Webservers kopiert.
+

public/krautspace.ics

@@ -14,13 +14,13 @@ BEGIN:VEVENT
 SUMMARY:"Chaostreff"
 UID:0000000002@kraut.space
 CLASS:PUBLIC
-DESCRIPTION:"Offene Runde"
+DESCRIPTION:Offene Runde
 DTEND;TZID=CET:20200623T235900
 DTSTAMP;TZID=CET:20200623T125900
 DTSTART;TZID=CET:20200623T200000
 GEO:50.9292035\,11.5825763
-LOCATION:"Krautgasse 26\, 07743 Jena"
+LOCATION:Krautgasse 26, 07743 Jena und online unter https://kraut.space/chaostreff
-URL;VALUE="HTTPS://kraut.space/chaostreff"
+URL:https://wiki.kraut.space/hswiki:veranstaltungen:regelmaessige:chaostreff:start
 ORGANIZER;CN="VORSTAND HACKSPACE JENA E.V.":MAILTO:office@kraut.space
 REFRESH-INTERVAL;VALUE=DURATION:P1W
 RRULE:FREQ=WEEKLY
@@ -29,28 +29,28 @@ BEGIN:VEVENT
 SUMMARY:"Brettspielrunde"
 UID:0000000003@kraut.space
 CLASS:PUBLIC
-DESCRIPTION:"Brettspielerei"
+DESCRIPTION:Brettspielerei
-DTEND;TZID=CET:20220518T235900
+DTSTAMP;TZID=CET:20221116T125900
-DTSTAMP;TZID=CET:20220518T125900
+DTSTART;TZID=CET:20221116T200000
-DTSTART;TZID=CET:20220518T200000
+DTEND;TZID=CET:20221116T235900
 GEO:50.9292035\,11.5825763
-LOCATION:"Krautgasse 26\, 07743 Jena"
+LOCATION:Krautgasse 26, 07743 Jena
-URL;VALUE="HTTPS://kraut.space/brettspielerei"
+URL:https://wiki.kraut.space/hswiki:veranstaltungen:regelmaessige:brettspielerei
 ORGANIZER;CN="VORSTAND HACKSPACE JENA E.V.":MAILTO:office@kraut.space
 REFRESH-INTERVAL;VALUE=DURATION:P1W
-RRULE:FREQ=WEEKLY;INTERVAL=2;WKST=MO;BYDAY=FR;BYWEEKNO=2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,36,38,40,42,44,46,48,50,52
+RRULE:FREQ=WEEKLY;INTERVAL=2;WKST=MO;BYDAY=WE;BYWEEKNO=2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,36,38,40,42,44,46,48,50,52
 END:VEVENT
 BEGIN:VEVENT
 SUMMARY:"Linux User Group"
 UID:0000000004@kraut.space
 CLASS:PUBLIC
-DESCRIPTION:"Alles rund um Linux"
+DESCRIPTION:Alles rund um Linux
 DTEND;TZID=CET:20200625T235900
 DTSTAMP;TZID=CET:20200623T125900
 DTSTART;TZID=CET:20200625T200000
 GEO:50.9292035\,11.5825763
-LOCATION:"Krautgasse 26\, 07743 Jena"
+LOCATION:Krautgasse 26, 07743 Jena und online unter https://kraut.space/lug
-URL;VALUE="HTTPS://kraut.space/lug"
+URL:https://wiki.kraut.space/hswiki:veranstaltungen:regelmaessige:lug:start
 ORGANIZER;CN="VORSTAND HACKSPACE JENA E.V.":MAILTO:office@kraut.space
 REFRESH-INTERVAL;VALUE=DURATION:P1W
 RRULE:FREQ=WEEKLY
@@ -59,13 +59,13 @@ BEGIN:VEVENT
 SUMMARY:"Gaming am Freitag"
 UID:0000000005@kraut.space
 CLASS:PUBLIC
-DESCRIPTION:"Der Stammtisch für Videospielkultur"
+DESCRIPTION:Der Stammtisch für Videospielkultur
 DTEND;TZID=CET:20220527T235900
 DTSTAMP;TZID=CET:20220527T125900
 DTSTART;TZID=CET:20220527T190000
 GEO:50.9292035\,11.5825763
-LOCATION:"Krautgasse 26\, 07743 Jena"
+LOCATION:Krautgasse 26, 07743 Jena
-URL;VALUE="HTTPS://kraut.space/gamingamfreitag"
+URL:https://wiki.kraut.space/hswiki:veranstaltungen:regelmaessige:gaming
 ORGANIZER;CN="VORSTAND HACKSPACE JENA E.V.":MAILTO:office@kraut.space
 REFRESH-INTERVAL;VALUE=DURATION:P1W
 RRULE:FREQ=WEEKLY;INTERVAL=2;WKST=MO;BYDAY=FR;BYWEEKNO=1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53
@@ -74,15 +74,15 @@ BEGIN:VEVENT
 SUMMARY:"Kinderbasteln"
 UID:0000000006@kraut.space
 CLASS:PUBLIC
-DESCRIPTION:"Natur und Technik für Vor- und Grundschulkinder"
+DESCRIPTION:Natur und Technik für Vor- und Grundschulkinder
 DTEND;TZID=CET:20220611T120000
 DTSTAMP;TZID=CET:20220611T100000
 DTSTART;TZID=CET:20220611T100000
 GEO:50.9292035\,11.5825763
-LOCATION:"Krautgasse 26\, 07743 Jena"
+LOCATION:Krautgasse 26, 07743 Jena
-URL;VALUE="HTTPS://kraut.space/kinderbasteln"
+URL:https://wiki.kraut.space/hswiki:veranstaltungen:regelmaessige:kinderbasteln
 ORGANIZER;CN="VORSTAND HACKSPACE JENA E.V.":MAILTO:basteln@kraut.space
 REFRESH-INTERVAL;VALUE=DURATION:P1W
-RRULE:FREQ=WEEKLY;INTERVAL=2;WKST=MO;BYDAY=FR;BYWEEKNO=1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53
+RRULE:WKST=MO;FREQ=WEEKLY;BYDAY=2SA,4SA
 END:VEVENT
 END:VCALENDAR

src/getEvents.php

@@ -1,344 +1,192 @@
 <?php
 
 /**
- * Datei: getEvents.php
+ * file: getEvents.php
- * Autor: bernd@nr18.space
+ * date: 20.11.2022
- * Letze Änderung: 08.07.2020
+ * user: bernd@nr18.space
- * Kurzbeschreibung:
- * Enthält Funktionen zum Parsen und Ausgeben einer iCalendar Kalenderdatei.
- * Die Bibliothek zum Parsen des iCalendarfiles stammt von ZContent.
- * Der Quelltext liegt auf https://github.com/zcontent/icalendar. Da sie
- * auf calendar.org verlinkt war, dachte ich eigentlich, daß sie gut wäre.
  */
-require_once("../src/lib/zapcallib.php");
 
+ini_set('log_errors', 1);
+ini_set('error_log', '../log/events.log');
+error_reporting(E_ALL & ~E_NOTICE & ~E_WARNING & ~E_DEPRECATED);
 
-function printEventList(): bool
+use Sabre\VObject;
-{
+
-/**
+include '/usr/share/php/Sabre/VObject/autoload.php';
- * Die Startfuktion für die Ausgabe der Termine als Liste in index.php.
+
- * Nach erfolgreicher initialisierung läuft die Funktion durch das Array
+define ("ICAL_FILE", "krautspace.ics");
- * der Events (ZCalNode´s vom Typ 'VEVENT') ruft für jedes Element erst
- * die Funktion zur Umwandlung in ein assoziatives Array und dann die
- * Ausgabefunktion auf. Gibt einen Boolean zurück.
- */
-    $events = initEvents();
-    $helper = new ZDateHelper();
-    date_default_timezone_set("UTC");
 
 /**
-     * Startdatum für wiederkehrende Termine aktualisieren
+ * Reads the content of the given ical file and creates with this string a
+ * vcalendar object.
  *
-     * @var ZCiCalNode $event
+ * @return vCalendar object | null
  */
-    foreach ($events as $event)
+function initCalendar(): ?object {
-    {
+    try {
-        /**
+        $data = file_get_contents(ICAL_FILE);
-         * @var ZCiCalDataNode $eventDTStart
+        $vcalendar = VObject\Reader::read(
-         */
+            $data
-        $eventDTStart = $event->data['DTSTART'];
+        );
-        /** @var string[] $eventDTStartValues */
+        return $vcalendar;
-        $eventDTStartValues = $eventDTStart->value;
+    } catch (Throwable $th) {
-        $event_start = $eventDTStartValues[0] ?? '';
+        error_log("Failed to read calendar file.");
-        $unix_start = $helper->fromiCaltoUnixDateTime($event_start);
+        error_log($th->getMessage(), 0);
-        $rrule = $event->data['RRULE']->value[0];
+        return null;
-
-        //todo rrule always set
-        if (EventIsPast($unix_start) === true AND isset ($rrule))
-        {
-            $new_unix = calculateNextStart($unix_start, $rrule);
-            $date = date('Ymd', $new_unix);
-            $time = date('His', $new_unix);
-            $connector = 'T';
-            $new_start = "{$date}{$connector}{$time}";
-            $event->data['DTSTART']->value[0] = $new_start;
     }
 }
 
 /**
-     * Eventliste nach Startdatum sortieren
+ * Grabs all VEVENTS from vCalendar object, append they to a list and
+ * returns the list.
+ *
+ * @param vCalendar object
+ * @return list | null
  */
-    usort($events, 'compareEventStart');
+function grabEvents(object $vcalendar): ?array {
-
+    $eventlist = [];
-    /**
+    try {
-     * Termine ausgeben
+        foreach ($vcalendar->VEVENT as $event) {
-     */
+            $eventlist[] = $event;
-    foreach ($events as $event)
-    {
-        printListItem($event);
         }
-    return true;
+    } catch (Throwable $th) {
+        error_log("Failed to grab evens.");
+        error_log($th->getMessage(), 0);
+        return null;
+    }
+    return $eventlist;
 }
 
-function printListItem(ZCiCalNode $event): bool
 /**
- * Die Ausgabefunktion für die Ausgabe der Termine als Liste. Hier wird die
+ * Becomes an instance from recurrency rule iterator and an datetime object.
- * Zeitangabe des iCal-Formates in Datum, Uhrzeit und Wochentag umgewandelt.
+ * Until the iterators date is in future, we call for the next date.
- * Anschließend erfolgt die Ausgabe der einzelnen Teile.
+ *
+ * @param iterator object
+ * @param datetime
+ * @return datetime | null
  */
-{
+function getNextDate(object $rriterator, DateTime $now): ?DateTime {
-    date_default_timezone_set("UTC");
+    foreach ($rriterator as $item) {
-    $helper = new ZDateHelper();
+        if ($item > $now) {
+            return $item;
+        }
+    }
+    return null;
+}
+
+/**
+ * Main function to display the events.
+ *
+ * @param array
+ * @param object
+ */
+function printEvent(array $eventarray, object $date_helper) {
+    $start_datetime = $eventarray[0];
+    $event = $eventarray[1];
+    $day = toGerman($start_datetime->format("l"));
+    $start = $start_datetime->format("d.m.Y H:i");
     $hyph = " - ";
     $uhr = " Uhr";
     $komma = ", ";
+    $dateline = "{$day}{$komma}{$start}{$uhr}{$hyph}";
 
-    $event_start = $event->data['DTSTART']->value[0];
+    if ($event->URL != "") {
-    $event_url = lowerURL($event->data['URL']->parameter['value']);
+        printHeadline($dateline, $event->SUMMARY, $event->URL);
-    $event_title = $event->data['SUMMARY']->value[0];
+    } else {
-    $event_location = trim($event->data['LOCATION']->value[0], '"');
+        printHeadline($dateline, $event->SUMMARY);
-    $event_descr = trim($event->data['DESCRIPTION']->value[0], '"');
-
-    $unix = $helper->fromiCaltoUnixDateTime($event_start);
-    $event_date = date('d.m.Y', $unix);
-    $event_time = date('H:i', $unix);
-    $event_day = toGerman(date('l', $unix));
-    $dateline = "{$event_day}{$komma}{$event_date}{$hyph}{$event_time}{$uhr}";
-
-    displayHeadline($dateline, $event_title);
-    displayLocation($event_location);
-    displayDescription($event_descr);
-    displayURL($event_url);
-    return true;
     }
-
+    if ($event->DESCRIPTION != "") {
-function displayHeadline(string $dateline, $event_title): bool
+        printDescription($event->DESCRIPTION);
-{
-    echo "\n<section class='termin'>\n";
-    echo "<p class='headline'>" . $dateline . ": " . $event_title . "</p>\n";
-    return true;
     }
-
+    if ($event->LOCATION != "") {
-function displayLocation(string $location): bool
+        printLocation($event->LOCATION);
-{
-    echo "<ul class='events'>\n";
-    echo "<li>$location</li>\n";
-    return true;
     }
-
+    printBottomline();
-function displayDescription(string $description): bool
-{
-    echo "<li>$description</li>\n";
-    return true;
-}
-
-function displayURL(string $url): bool
-{
-    $stripped = trim($url, '"');
-    echo "<li><a href=" . $url . ">" . $stripped . "</a></li>\n";
-    echo "</ul>\n";
-    echo "</section>\n";
-    return true;
 }
 
 /**
- *  Die Startfuktion für die Ausgabe der Termine als Tabelle in termine.php
+ * Outputs the opening tags for section and ul, the date and time, and
+ * summary. ifi a url is given, the summary is a link to the corresponding
+ * wiki page.
+ *
+ * @param string
+ * @param string
  */
-
+function printHeadline(string $dateline, string $summary, string $url=null) {
-function printEventTable(): bool
+    echo("\n<section class='termin'>");
-{
+    if ($url == null) {
-    $events = initEvents();
+        echo("\n<p class='headline'>$dateline$summary</p>");
-    printTableHead();
+    } else {
-    foreach ($events as $event)
+        echo("\n<p class='headline'>$dateline<a href='$url'>$summary</a></p>");
-    {
-        $event_array = getEventArray($event);
-        printTableItem($event_array);
     }
-    echo "\t</tbody>\n";
+    echo("\n<ul class='events'>");
-    echo "</table>\n";
-    return true;
-}
-
-function printTableHead()
-{
-    echo "\n\r<table class='w3-table w3-bordered'>\n";
-    echo "\t<thead>\n";
-    echo "\t<tr>\n";
-    echo "\t\t<th>Datum</th>\n";
-    echo "\t\t<th>Wochentag</th>\n";
-    echo "\t\t<th>Zeit</th>\n";
-    echo "\t\t<th>Ort</th>\n";
-    echo "\t\t<th>Titel</th>\n";
-    echo "\t\t<th>Beschreibung</th>\n";
-    echo "\t</tr>\n";
-    echo "\t</thead>\n";
-    echo "\t<tbody>\n";
-}
-
-function printTableItem($event_array): bool
-{
-    date_default_timezone_set("UTC");
-    $time = $event_array['DTSTART'];
-    $helper = new ZDateHelper();
-    $unix = $helper->fromiCaltoUnixDateTime($time);
-    $event_date = date('d.m.Y', $unix);
-    $event_time = date('H:i', $unix);
-    $event_day = toGerman(date('l', $unix));
-    $event_uid = $event_array['UID'];
-    $event_url = lowerURL($event_array['URL']);
-    $event_title = trim($event_array['SUMMARY'], '"');
-    $event_descr = trim($event_array['DESCRIPTION'], '"');
-    $event_location = trim($event_array['LOCATION'], '"');
-    echo "\t<tr id='" . $event_uid . "'>\n";
-    echo "\t\t<td>" . $event_date . "</td>\n";
-    echo "\t\t<td>" . $event_day . "</td>\n";
-    echo "\t\t<td>" . $event_time . " Uhr</td>\n";
-    echo "\t\t<td>" . $event_location . "</td>\n";
-    echo "\t\t<td>" . $event_title . "</td>\n";
-    echo "\t\t<td>" . $event_descr;
-    printURL($event_url);
-    echo "\t</tr>\n";
-    return true;
-}
-
-function printURL(string $url): bool
-{
-    $stripped = trim($url, '"');
-    if ($url != '')
-    {
-        echo "</br><a class='event' href=" . $url . ">" . $stripped . "</a></td>\n";
-    }
-    else
-    {
-        echo "</td>\n";
-    }
-    return true;
 }
 
 /**
- *  Funktionen, die von beiden Ausgaben benutzt werden.
+ * Outputs the events description.
+ *
+ * @param string
  */
+function printDescription(string $description) {
+    echo("\n<li>$description</li>");
+}
 
 /**
- * @return ZCiCalNode[]|null
+ * Outputs the events location.
+ *
+ * @param string
  */
-function initEvents(): ?array
+function printLocation(string $location) {
+    $location = makeLinks($location);
+    echo("\n<li>$location</li>");
+}
+
 /**
- * Allgemeingültige Funktion zur Initialisierung. Enthält die Schritte, die
+ * Outputs the closing tags for ul and section.
- * von beiden Ausgaben gleichermaßen gebraucht werden.
- *  - Erstellen des iCalendar Objekts (initCalendar).
- *  - Schaut, ob der Kalender überhaupt Events enthält (printEventCount).
- *  - Sammel alle Events in einer Liste (grabEvents).
- *  Gibt zweidimmensionales assoziatives Array oder Null zurück.
  */
-{
+function printBottomline() {
-    $iCalObj = initCalendar();
+    echo("\n</ul>");
-    if (!isset ($iCalObj))
+    echo("\n</section>\n");
-    {
-        printError("Fehler beim Initialisieren des Kalenders");
-        return null;
-    }
-    $count = printEventCount($iCalObj);
-    if ($count == 0 or $count == false)
-    {
-        return null;
-    }
-    $events = grabEvents($iCalObj);
-    return $events;
 }
 
-function initCalendar(): ?ZCiCal
 /**
- * Erstellt das Kalenderobjekt vom Typ ZCiCal.
+ * Helper function to sort the events chronologically. Compares the first
- * Gibt das Kalenderobjekt oder Null zurück.
+ * entry from the event array (DateTime object).
+ *
+ * @param array
+ * @param array
+ * @return integer
  */
-{
+function compareEventStart(array $event_a, array $event_b): int {
-    $iCalFile = '../public/krautspace.ics';
+    // echo("Compare " . $event_a[0] . " and " . $event_b[0] . "\n");
-    $iCalString = file_get_contents($iCalFile);
+    $a = $event_a[0];
-    if ($iCalString == false)
+    $b = $event_b[0];
-    {
+    return $a <=> $b;
-        printError("Kann Kalenderdatei nicht lesen");
-        return null;
-    }
-    $iCalObj = new ZCiCal($iCalString);
-    return $iCalObj;
 }
 
-function printEventCount(ZCiCal $iCalObj): ?int
 /**
- * Gibt die Anzahl der Events zurück, die das übergebene
+ * Becomes the description string and makes urls contained in this string
- * Kalenderobjekt enthält. Im Fehlerfall wird Null zurück
+ * clickable. If anything goes wrong it returns the origin string.
- * gegeben.
+ *
+ * @param string
+ * @return string
  */
-{
+function makeLinks(string $description) {
-    $eventCount = $iCalObj->countEvents();
+    try {
-    if (!isset ($eventCount))
+        $reg_pattern = "/(((http|https)\:\/\/)|(www\.))[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,5}(\:[a-zA-Z0-9]+)?(\/\S*)?/";
-    {
+        return $new = preg_replace($reg_pattern, '<a href="$0" target="_blank" rel="noopener noreferrer">$0</a>', $description);
-        printError("Fehler beim Parsen des Kalenders");
+    } catch (Throwable $th) {
-        return null;
+        return $description;
     }
-    // echo "<p>$eventCount anstehende Events</p>";
-    return $eventCount;
 }
 
-function grabEvents(ZCiCal $iCalObj): ?array
-{
 /**
- * Läuft durch das iCalendar objekt und sammelt alle Nodes vom Typ
+ * Translates the english weekday names to german.
- * 'VEVENT' ein. Gibt ein Array mit Objekten vom Typ 'ZCiCalNode' zurück.
+ *
- * Im Fehlerfall wird Null zurück gegeben.
+ * @param string
+ * @return string | null
  */
-    $events = [];
+function toGerman(string $day): ?string
-    if (isset ($iCalObj->tree->child))
-    {
-        foreach ($iCalObj->tree->child as $node)
-        {
-            if ($node->getName() == "VEVENT")
-            {
-                $events[] = $node;
-            }
-        }
-    }
-    else
-    {
-        printError("Cant find nodes");
-        return null;
-    }
-    return $events;
-}
-
-function getEventArray(ZCiCalNode $node): array
-{
-/**
- * Bekommt eine Event Node vom Typ 'ZiCalNode' übergeben und extrahiert
- * daraus die gewünschten Elemente. Bildet daraus ein zweidimmensionales
- * assoziatives Array. Gibt dieses Array zurück.
- * Wird derzeit nur von der tabellarischen Ausgabe referenziert, welche
- + momentan nicht genutzt wird.
- */
-    /**
-     * @var ZCiCalNode $node
-     * @var ZCiCalDataNode $event
-     */
-    $event = $node->data;
-    $event_array = [];
-    $keys = array('DTSTART', 'SUMMARY', 'DESCRIPTION', 'URL', 'LOCATION');
-
-    foreach ($keys as $key)
-    {
-        $event_array[$key] = $event[$key]->value[0];
-        if ($key === 'DTSTART')
-        {
-            if (isset ($event[$key]->parameter['tzid']))
-            {
-                $event_array['TZ'] = $event[$key]->parameter['tzid'];
-            }
-        }
-        else if ($key === 'URL')
-        {
-            $event_array[$key] = $event[$key]->parameter['value'];
-        }
-    }
-    return $event_array;
-}
-
-function printError($errMsg)
-{
-    echo "\n\r<p>$errMsg</p>\n\r";
-    return true;
-}
-
-function toGerman(string $day): string
 {
     switch ($day)
     {
@@ -357,131 +205,91 @@ function toGerman(string $day): string
         case 'Sunday':
             return 'Sonntag';
         default:
-            return '?';
+            return null;
     }
 }
 
-function lowerURL(string $url): string
-{
-    $old = array('HTTPS', 'HTTP', 'FTP', 'WWW', 'SSH');
-    $new = array('https', 'http', 'ftp', 'www', 'ssh');
-    $new_url = str_replace($old, $new, $url);
-    return $new_url;
-}
 
-function calculateNextStart(int $unix_start, string $rrule): int
+///////////////////////////////////////////////////////////////////////////
+/// start des programmes
+///////////////////////////////////////////////////////////////////////////
+
 /**
- * Berechnet für wiederkehrende Termine den aktuell nächsten Termin.
+ * The main function.
- * dabei werden zur Zeit nur der der Zeitraum zwischen zwei Terminen
+ *
- * und eine mögliche Anzahl der Termine berücksichtigt. Gibt den neuen
- * Termin als Unix-Zeitstempel zurück.
  */
-{
+function printEventList(): bool {
-    $counter = 0;
+    error_log("getEvents called");
+    date_default_timezone_set("Europe/Berlin");
+    $today_datetime = new DateTime();
+    date_time_set($today_datetime, 0, 0, 0, 0);
+    $date_helper = new VObject\DateTimeParser();
+    $eventlist = [];
+    $next_events = [];
 
-    $rule_array = getRuleArray($rrule);
+    // einlesen der kalenderdatei
-    if (isset ($rule_array['COUNT']))
-    {
-        $count = $rule_array['COUNT'];
-    }
-    if (isset ($rule_array['FREQ']))
-    {
-        $frequency = $rule_array['FREQ'];
-    }
-    if (isset ($rule_array['INTERVAL']))
-    {
-        $interval = $rule_array['INTERVAL'];
-    }
-    if (isset ($rule_array['UNTIL']))
-    {
-        //todo implement
-        $until_string = $rule_array['UNTIL'];
-    }
 
-    $freq_offset = getOffset($frequency);
+    $vcalendar = initCalendar();
-    if (isset ($interval))
+    if ($vcalendar == null) {
-    {
+        error_log("getEvents unsuccessful terminated");
-        $offset = $freq_offset * $interval;
-    }
-    else
-    {
-        $offset = $freq_offset;
-    }
-    while ($unix_start <= time())
-    {
-        if (isset ($count))
-        {
-            if ($counter >= $count)
-            {
-                break;
-            }
-        }
-        $unix_start = $unix_start + $offset;
-        $counter = $counter + 1;
-    }
-    return $unix_start;
-}
-
-function getOffset(string $frequence): int
-{
-    switch ($frequence)
-    {
-        case 'HOURLY':
-            return 3600;
-        case 'DAILY':
-            return 86400;
-        case 'WEEKLY':
-            return 604800;
-        default:
-            return 1;
-    }
-}
-
-function getRuleArray(string $rrule): array
-/**
- * Zerlegt den String einer RRULE und gibt die einzelnen Elemente als
- * assoziatives Array zurück.
- */
-{
-    $rule_array = [];
-    $rule_strings = explode(';', $rrule);
-    foreach ($rule_strings as $r_string)
-    {
-        $rule = explode('=', $r_string);
-        $rule_array[$rule[0]] = $rule[1];
-    }
-    return $rule_array;
-}
-
-function EventIsPast(int $unix_start): bool
-/**
- * Prüft, ob die übergebenen Unixzeit älter als der aktuelle Tag ist. Gibt
- * Wahr oder Falsch zurück.
- */
-{
-    $event_date = date('d.m.Y', $unix_start);
-    $day_end = strtotime($event_date) + 86400;
-    $actual_date = time();
-
-    if ($day_end < $actual_date)
-    {
-        return true;
-    }
         return false;
     }
 
-/**
+    // die events aus dem kalender herausziehen
- * Bekommt zwei Eventnodes übergeben und vergleicht deren Startdatum. Die
+
- * Funktion wird intern von ausort() benutzt, um das Array mit den Eventnodes
+    $eventlist = grabEvents($vcalendar);
- * nach Datum zu sortieren.
+    if ($eventlist == null) {
- *
+        error_log("gabEvent returns null");
- * @param ZCiCalNode $event_a
+        return false;
- * @param ZCiCalNode $event_b
- * @return int
- */
-function compareEventStart(ZCiCalNode $event_a, ZCiCalNode $event_b): int
-{
-    $a = $event_a->data['DTSTART']->value[0];
-    $b = $event_b->data['DTSTART']->value[0];
-    return $a <=> $b;
     }
+    elseif (count($eventlist) == 0) {
+        echo("\n<p>Keine Termine gefunden</p>\n");
+        return false;
+    }
+
+    // durch die liste der events laufen. wir holen uns den starttermin und
+    // wandeln ihn in ein datetime objekt um. liegt das in der vergangenheit
+    // und der termin hat eine rrule, holen wir uns einen iterator über die
+    // rrule (dazu brauchen wir die uid) und versuche den nächsten gültigen
+    // termin zu bekommen. gibt es einen gültigen termin, wird das event mit
+    // dem neuen starttermin an die liste der relevanten termine angehängt.
+    // ist der starttermin von anfang an in der zukunft, dann wird er
+    // natürlich auch angehängt.
+
+    foreach ($eventlist as $event) {
+        $next_event = [];
+        $e_uid = $event->UID;
+        $e_start = $event->DTSTART;
+        $e_summary = $event->SUMMARY;
+        $e_description = $event->DESCRIPTION;
+        $e_location = $event->LOCATION;
+        $e_url = $event->URL;
+              $start_datetime = $date_helper->parseDateTime($e_start);
+              if ($start_datetime < $today_datetime) {
+                  if (isset($event->RRULE)) {
+                      $rriter = new VObject\RecurrenceIterator($vcalendar, $e_uid);
+                      $start_datetime = getNextDate($rriter, $today_datetime);
+                      if ($start_datetime == null) {
+                          continue;
+                      } else {
+                          array_push($next_events, array($start_datetime, $event));
+                      }
+                  }
+              } else {
+                  array_push($next_events, array($start_datetime, $event));
+              }
+        }
+
+        // liste der anstehenden events nach dem begin sortieren
+
+        usort($next_events, "compareEventStart");
+
+        // die sortierte liste ausgeben
+
+        foreach ($next_events as $event) {
+            printEvent($event, $date_helper);
+        }
+        error_log("getEvents successful terminated");
+        return true;
+}
+

src/lib/README.md

@@ -1,127 +0,0 @@
-# Zap Calendar iCalendar Library
-
-(https://github.com/zcontent/icalendar)
-
-The Zap Calendar iCalendar Library is a PHP library for supporting the iCalendar (RFC 5545) standard.
-
-This PHP library is for reading and writing iCalendar formatted feeds and 
-files. Features of the library include:
-
-- Read AND write support for iCalendar files
-- Object based creation and manipulation of iCalendar files
-- Supports expansion of RRULE to a list of repeating dates
-- Supports adding timezone info to iCalendar file
-
-All iCalendar data is stored in a PHP object tree.
-This allows any property to be added to the iCalendar feed without
-requiring specialized library function calls.
-With power comes responsibility.  Missing or invalid properties can cause 
-the resulting iCalendar file to be invalid. Visit [iCalendar.org](http://icalendar.org) to view valid
-properties and test your feed using the site's [iCalendar validator tool](http://icalendar.org/validator.html).
-
-Library API documentation can be found at http://icalendar.org/zapcallibdocs
-
-See the examples folder for programs that read and write iCalendar
-files. At its simpliest, you need to include the library at the top of your program:
-
-```php
-require_once($path_to_library . "/zapcallib.php");
-```
-
-Create an ical object using the ZCiCal object:
-
-```php
-$icalobj = new ZCiCal();
-```
-
-Add an event object:
-
-```php
-$eventobj = new ZCiCalNode("VEVENT", $icalobj->curnode);
-```
-
-Add a start and end date to the event:
-
-```php
-// add start date
-$eventobj->addNode(new ZCiCalDataNode("DTSTART:" . ZCiCal::fromSqlDateTime("2020-01-01 12:00:00")));
-
-// add end date
-$eventobj->addNode(new ZCiCalDataNode("DTEND:" . ZCiCal::fromSqlDateTime("2020-01-01 13:00:00")));
-```
-
-Write the object in iCalendar format using the  export() function call:
-
-```php
-echo $icalobj->export();
-```
-
-This example will not validate since it is missing some required elements. 
-Look at the simpleevent.php example for the minimum # of elements 
-needed for a validated iCalendar file.
-
-To create a multi-event iCalendar file, simply create multiple event objects. For example:
-
-```php
-$icalobj = new ZCiCal();
-$eventobj1 = new ZCiCalNode("VEVENT", $icalobj->curnode);
-$eventobj1->addNode(new ZCiCalDataNode("SUMMARY:Event 1"));
-...
-$eventobj2 = new ZCiCalNode("VEVENT", $icalobj->curnode);
-$eventobj2->addNode(new ZCiCalDataNode("SUMMARY:Event 2"));
-...
-```
-
-To read an existing iCalendar file/feed, create the ZCiCal object with a string representing the contents of the iCalendar file:
-
-```php
-$icalobj = new ZCiCal($icalstring);
-```
-
-Large iCalendar files can be read in chunks to reduce the amount of memory needed to hold the iCalendar feed in memory. This example reads 500 events at a time:
-
-```php
-$icalobj = null;
-$eventcount = 0;
-$maxevents = 500;
-do
-{
-	$icalobj = newZCiCal($icalstring, $maxevents, $eventcount);
-	...
-	$eventcount +=$maxevents;
-}
-while($icalobj->countEvents() >= $eventcount);
-```
-
-You can read the events from an imported (or created) iCalendar object in this manner:
-
-```php
-foreach($icalobj->tree->child as $node)
-{
-	if($node->getName() == "VEVENT")
-	{
-		foreach($node->data as $key => $value)
-		{
-			if($key == "SUMMARY")
-			{
-				echo "event title: " . $value->getValues() . "\n";
-			}
-		}
-	}
-}
-```
-
-## Known Limitations
-
-- Since the library utilizes objects to read and write iCalendar data, the 
-size of the iCalendar data is limited to the amount of available memory on the machine.
-The ZCiCal() object supports reading a range of events to minimize memory
-space.
-- The library ignores timezone info when importing files, instead utilizing PHP's timezone
-library for calculations (timezones are supported when exporting files).
-Imported timezones need to be aliased to a [PHP supported timezone](http://php.net/manual/en/timezones.php).
-- At this time, the library does not support the "BYSETPOS" option in RRULE items.
-- At this time, the maximum date supported is 2036 to avoid date math issues
-with 32 bit systems.
-- Repeating events are limited to a maximum of 5,000 dates to avoid memory or infinite loop issues
-

src/lib/includes/date.php

@@ -1,568 +0,0 @@
-<?php
-/**
- * date.php - date helper class
- *
- * @package	ZapCalLib
- * @author	Dan Cogliano <http://zcontent.net>
- * @copyright   Copyright (C) 2006 - 2017 by Dan Cogliano
- * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
- * @link	http://icalendar.org/php-library.html
- */
-
-// No direct access
-defined('_ZAPCAL') or die( 'Restricted access' );
-
-/**
- * Zap Calendar Date Helper Class
- *
- * Helper class for various date functions
- */
-class ZDateHelper {
-
-	/**
-	 * Find the number of days in a month
-	 *
-	 * @param int $month Month is between 1 and 12 inclusive
-	 *
-	 * @param int $year is between 1 and 32767 inclusive
-	 *
-	 * @return int 
-	 */
-	static function DayInMonth($month, $year) {
-	   $daysInMonth = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
-	   if ($month != 2) return $daysInMonth[$month - 1];
-	   return (checkdate($month, 29, $year)) ? 29 : 28;
-	}
-
-	/**
-	 * Is given date today?
-	 *
-	 * @param int $date date in Unix timestamp format
-	 *
-	 * @param int $tzid PHP recognized timezone (default is UTC)
-	 *
-	 * @return bool
-	 */
-	static function isToday($date, $tzid = "UTC") {
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return gmdate('Y-m-d', $date) == gmdate('Y-m-d', $now);
-	}
-
-	/**
-	 * Is given date before today?
-	 *
-	 * @param int $date date in Unix timestamp format
-	 *
-	 * @param int $tzid PHP recognized timezone (default is UTC)
-	 *
-	 * @return bool
-	 */
-	static function isBeforeToday($date, $tzid = "UTC"){
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return mktime(0,0,0,date('m',$now),date('d',$now),date('Y',$now)) >
-			mktime(0,0,0,date('m',$date),date('d',$date),date('Y',$now));
-	}
-
-	/**
-	 * Is given date after today?
-	 *
-	 * @param int $date date in Unix timestamp format
-	 *
-	 * @param int $tzid PHP recognized timezone (default is UTC)
-	 *
-	 * @return bool
-	 */
-	static function isAfterToday($date, $tzid = "UTC"){
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return mktime(0,0,0,date('m',$now),date('d',$now),date('Y',$now)) <
-			mktime(0,0,0,date('m',$date),date('d',$date),date('Y',$now));
-	}
-
-	/**
-	 * Is given date tomorrow?
-	 *
-	 * @param int $date date in Unix timestamp format
-	 *
-	 * @param int $tzid PHP recognized timezone (default is UTC)
-	 *
-	 * @return bool
-	 */
-	static function isTomorrow($date, $tzid = "UTC") {
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return gmdate('Y-m-d', $date) == gmdate('Y-m-d', $now + 60 * 60 * 24);
-	}
-
-	/**
-	 * Is given date in the future?
-	 *
-	 * This routine differs from isAfterToday() in that isFuture() will
-	 * return true for date-time values later in the same day.
-	 *
-	 * @param int $date date in Unix timestamp format
-	 *
-	 * @param int $tzid PHP recognized timezone (default is UTC)
-	 *
-	 * @return bool
-	 */
-	static function isFuture($date, $tzid = "UTC"){
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return $date > $now;
-	}
-
-	/**
-	 * Is given date in the past?
-	 *
-	 * This routine differs from isBeforeToday() in that isPast() will
-	 * return true for date-time values earlier in the same day.
-	 *
-	 * @param int $date date in Unix timestamp format
-	 *
-	 * @param int $tzid PHP recognized timezone (default is UTC)
-	 *
-	 * @return bool
-	 */
-	static function isPast($date, $tzid = "UTC") {
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return $date < $now;
-	}
-
-	/**
-	 * Return current Unix timestamp in local timezone
-	 *
-	 * @param string $tzid PHP recognized timezone
-	 *
-	 * @return int
-	 */
-	static function now($tzid = "UTC"){
-		$dtz = new DateTimeZone($tzid);
-		$dt = new DateTime("now", $dtz);
-		$now = time() + $dtz->getOffset($dt);
-		return $now;
-	}
-
-	/**
-	 * Is given date fall on a weekend?
-	 *
-	 * @param int $date Unix timestamp
-	 *
-	 * @return bool
-	 */
-	static function isWeekend($date) {
-		$dow = gmdate('w',$date);
-		return $dow == 0 || $dow == 6;
-	}
-
-	/**
-	 * Format Unix timestamp to SQL date-time
-	 *
-	 * @param int $t Unix timestamp
-	 *
-	 * @return string
-	 */
-	static function toSqlDateTime($t = 0)
-	{
-		date_default_timezone_set('GMT');
-		if($t == 0)
-			return gmdate('Y-m-d H:i:s',self::now());
-		return gmdate('Y-m-d H:i:s', $t);
-	}
-
-	/**
-	 * Format Unix timestamp to SQL date
-	 *
-	 * @param int $t Unix timestamp
-	 *
-	 * @return string
-	 */
-	static function toSqlDate($t = 0)
-	{
-		date_default_timezone_set('GMT');
-		if($t == 0)
-			return gmdate('Y-m-d',self::now());
-		return gmdate('Y-m-d', $t);
-	}
-
-	/**
-	 * Format iCal date-time string to Unix timestamp
-	 *
-	 * @param string $datetime in iCal time format ( YYYYMMDD or YYYYMMDDTHHMMSS or YYYYMMDDTHHMMSSZ )
-	 * 
-	 * @return int Unix timestamp
-	 */
-	static function fromiCaltoUnixDateTime($datetime) {
-			// first check format
-			$formats = array();
-			$formats[] = "/[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]/";
-			$formats[] = "/[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]T[0-9][0-9][0-9][0-9][0-9][0-9]/";
-			$formats[] = "/[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]T[0-9][0-9][0-9][0-9][0-9][0-9]Z/";
-			$ok = false;
-			foreach($formats as $format){
-				if(preg_match($format,$datetime)){
-					$ok = true;
-					break;
-				}
-			}
-			if(!$ok)
-				return null;
-			$year = substr($datetime,0,4);
-			$month = substr($datetime,4,2);
-			$day = substr($datetime,6,2);
-			$hour = 0;
-			$minute = 0;
-			$second = 0;
-			if(strlen($datetime) > 8 && $datetime[8] == "T") {
-				$hour = substr($datetime,9,2);
-				$minute = substr($datetime,11,2);
-				$second = substr($datetime,13,2);
-			}
-			return gmmktime($hour, $minute, $second, $month, $day, $year);
-	}
-
-	/**
-	 * Format Unix timestamp to iCal date-time string
-	 *
-	 * @param int $datetime Unix timestamp
-	 *
-	 * @return string
-	 */
-	static function fromUnixDateTimetoiCal($datetime){
-		date_default_timezone_set('GMT');
-		return gmdate("Ymd\THis",$datetime);
-	}
-
-	/**
-	 * Convert iCal duration string to # of seconds
-	 * 
-	 * @param string $duration iCal duration string
-	 *
-	 * return int 
-	 */
-	static function iCalDurationtoSeconds($duration) {
-		$secs = 0;
-		if($duration[0] == "P") {
-			$duration = str_replace(array("H","M","S","T","D","W","P"),array("H,","M,","S,","","D,","W,",""),$duration);
-			$dur2 = explode(",",$duration);
-			foreach($dur2 as $dur){
-				$val=intval($dur);
-				if(strlen($dur) > 0){
-					switch($dur{strlen($dur) - 1}) {
-						case "H":
-							$secs += 60*60 * $val;
-							break;
-						case "M":
-							$secs += 60 * $val;
-							break;
-						case "S":
-							$secs += $val;
-							break;
-						case "D":
-							$secs += 60*60*24 * $val;
-							break;
-						case "W":
-							$secs += 60*60*24*7 * $val;
-							break;
-					}
-				}
-			}
-		}
-		return $secs;
-	}
-
-	/**
-	 * Check if day falls within date range
-	 *
-	 * @param int $daystart start of day in Unix timestamp format
-	 *
-	 * @param int $begin Unix timestamp of starting date range
-	 *
-	 * @param int $end Unix timestamp of end date range
-	 *
-	 * @return bool
-	 */
-	static function inDay($daystart, $begin, $end)
-	{
-		//$dayend = $daystart + 60*60*24 - 60;
-		// add 1 day to determine end of day
-		// don't use 24 hours, since twice a year DST Sundays are 23 hours and 25 hours in length
-		// adding 1 day takes this into account
-		$dayend = self::addDate($daystart, 0,0,0,0,1,0);
-
-		$end = max($begin, $end); // $end can't be less than $begin
-		$inday = 
-			($daystart <= $begin && $begin < $dayend)
-			||($daystart < $end && $end < $dayend)
-			||($begin <= $daystart && $end > $dayend)
-			;
-		return $inday;
-	}
-
-	/**
-	 * Convert SQL date or date-time to Unix timestamp
-	 *
-	 * @param string $datetime SQL date or date-time
-	 *
-	 * @return int Unix date-time timestamp
-	 */
-	static function toUnixDate($datetime)
-	{
-			$year = substr($datetime,0,4);
-			$month = substr($datetime,5,2);
-			$day = substr($datetime,8,2);
-
-			return mktime(0, 0, 0, $month, $day, $year);
-	}
-
-	/**
-	 * Convert SQL date or date-time to Unix date timestamp
-	 *
-	 * @param string $datetime SQL date or date-time
-	 *
-	 * @return int Unix timestamp
-	 */
-	static function toUnixDateTime($datetime)
-	{
-		// convert to absolute dates if neccessary
-		$datetime = self::getAbsDate($datetime);
-		$year = substr($datetime,0,4);
-		$month = substr($datetime,5,2);
-		$day = substr($datetime,8,2);
-		$hour = 0;
-		$minute = 0;
-		$second = 0;
-		if(strlen($datetime) > 10) {
-			$hour = substr($datetime,11,2);
-			$minute = substr($datetime,14,2);
-			$second = substr($datetime,17,2);
-		}
-		return gmmktime($hour, $minute, $second, $month, $day, $year);
-	}
-
-	/**
-	 * Date math: add or substract from current date to get a new date
-	 *
-	 * @param int $date date to add or subtract from
-	 *
-	 * @param int $hour add or subtract hours from date
-	 *
-	 * @param int $min add or subtract minutes from date
-	 * 
-	 * @param int $sec add or subtract seconds from date
-	 * 
-	 * @param int $month add or subtract months from date
-	 * 
-	 * @param int $day add or subtract days from date
-	 * 
-	 * @param int $year add or subtract years from date
-	 *
-	 * @param string $tzid PHP recognized timezone (default is UTC)
-	 */
-	static function addDate($date, $hour, $min, $sec, $month, $day, $year, $tzid = "UTC") {
-		date_default_timezone_set($tzid);
-		$sqldate = self::toSQLDateTime($date);
-		$tdate = array();
-		$tdate["year"] = substr($sqldate,0,4);
-		$tdate["mon"] = substr($sqldate,5,2);
-		$tdate["mday"] = substr($sqldate,8,2);
-		$tdate["hours"] = substr($sqldate,11,2);
-		$tdate["minutes"] = substr($sqldate,14,2);
-		$tdate["seconds"] = substr($sqldate,17,2);
-		$newdate=mktime($tdate["hours"] + $hour, $tdate["minutes"] + $min, $tdate["seconds"] + $sec, $tdate["mon"] + $month, $tdate["mday"] + $day, $tdate["year"] + $year);
-		date_default_timezone_set("UTC");
-		//echo self::toSQLDateTime($date) . " => " . self::toSQLDateTime($newdate) . " ($hour:$min:$sec $month/$day/$year)<br/>\n";
-		return $newdate;
-	}
-
-	/**
-	 * Date math: get date from week and day in specifiec month
-	 *
-	 * This routine finds actual dates for the second Tuesday of the month, last Friday of the month, etc.
-	 * For second Tuesday, use $week = 1, $wday = 2
-	 * for last Friday, use $week = -1, $wday = 5
-	 *
-	 * @param int $date Unix timestamp
-	 *
-	 * @param int $week week number, 0 is first week, -1 is last
-	 *
-	 * @param int $wday day of week, 0 is Sunday, 6 is Saturday
-	 *
-	 * @param string $tzid PHP supported timezone
-	 *
-	 * @return int Unix timestamp
-	 */
-	static function getDateFromDay($date, $week, $wday,$tzid="UTC") {
-		//echo "getDateFromDay(" . self::toSqlDateTime($date) . ",$week,$wday)<br/>\n";
-		// determine first day in month
-		$tdate = getdate($date);
-		$monthbegin = gmmktime(0,0,0, $tdate["mon"],1,$tdate["year"]);
-		$monthend = self::addDate($monthbegin, 0,0,0,1,-1,0,$tzid); // add 1 month and subtract 1 day
-		$day = self::addDate($date,0,0,0,0,1 - $tdate["mday"],0,$tzid);
-		$month = array(array());
-		while($day <= $monthend) {
-			$tdate=getdate($day);
-			$month[$tdate["wday"]][]=$day;
-			//echo self::toSQLDateTime($day) . "<br/>\n";
-			$day = self::addDate($day, 0,0,0,0,1,0,$tzid); // add 1 day
-		}
-		$dayinmonth=0;
-		if($week >= 0)
-			$dayinmonth = $month[$wday][$week];
-		else
-			$dayinmonth = $month[$wday][count($month[$wday]) - 1];
-		//echo "return " . self::toSQLDateTime($dayinmonth);
-		//exit;
-		return $dayinmonth;
-	}
-
-	/**
-	 * Convert UTC date-time to local date-time
-	 * 
-	 * @param string $sqldate SQL date-time string
-	 *
-	 * @param string $tzid PHP recognized timezone (default is "UTC")
-	 *
-	 * @return string SQL date-time string
-	 */
-	static function toLocalDateTime($sqldate, $tzid = "UTC" ){
-		try
-		{
-			$timezone = new DateTimeZone($tzid);
-		}
-		catch(Exception $e)
-		{
-			// bad time zone specified
-			return $sqldate;
-		}
-		$udate = self::toUnixDateTime($sqldate);
-		$daydatetime = new DateTime("@" . $udate);
-		$tzoffset = $timezone->getOffset($daydatetime);
-		return self::toSqlDateTime($udate + $tzoffset);
-	}
-
-	/**
-	 * Convert local date-time to UTC date-time
-	 * 
-	 * @param string $sqldate SQL date-time string
-	 *
-	 * @param string $tzid PHP recognized timezone (default is "UTC")
-	 *
-	 * @return string SQL date-time string
-	 */
-	static function toUTCDateTime($sqldate, $tzid = "UTC" ){
-
-		date_default_timezone_set("UTC");
-		try
-		{
-			$date = new DateTime($sqldate, $tzid);
-		}
-		catch(Exception $e)
-		{
-			// bad time zone specified
-			return $sqldate;
-		}
-		$offset = $date->getOffsetFromGMT();
-		if($offset >= 0)
-			$date->sub(new DateInterval("PT".$offset."S"));
-		else
-			$date->add(new DateInterval("PT".abs($offset)."S"));
-		return $date->toSql(true);
-	}
-
-	/**
-	 * Convert from a relative date to an absolute date
-	 *
-	 * Examples of relative dates are "-2y" for 2 years ago, "18m"
-	 * for 18 months after today. Relative date uses "y", "m" and "d" for
-	 * year, month and day. Relative date can be combined into comma 
-	 * separated list, i.e., "-1y,-1d" for 1 year and 1 day ago.
-	 *
-	 * @param string $date relative date string (i.e. "1y" for 1 year from today)
-	 *
-	 * @param string $rdate reference date, or blank for current date (in SQL date-time format)
-	 *
-	 * @return string in SQL date-time format
-	 */
-	static function getAbsDate($date,$rdate = ""){
-		if(str_replace(array("y","m","d","h","n"),"",strtolower($date)) != strtolower($date)){
-			date_default_timezone_set("UTC");
-			if($rdate == "")
-				$udate = time();
-			else
-				$udate = self::toUnixDateTime($rdate);
-			$values=explode(",",strtolower($date));
-			$y = 0;
-			$m = 0;
-			$d = 0;
-			$h = 0;
-			$n = 0;
-			foreach($values as $value){
-				$rtype = substr($value,strlen($value)-1);
-				$rvalue = intval(substr($value,0,strlen($value) - 1));
-				switch($rtype){
-					case 'y':
-						$y = $rvalue;
-						break;
-					case 'm':
-						$m = $rvalue;
-						break;
-					case 'd':
-						$d = $rvalue;
-						break;
-					case 'h':
-						$h = $rvalue;
-						break;
-					case 'n':
-						$n = $rvalue;
-						break;
-				}
-				// for "-" values, move to start of day , otherwise, move to end of day
-				if($rvalue[0] == '-')
-					$udate = mktime(0,0,0,date('m',$udate),date('d',$udate),date('Y',$udate));
-				else
-					$udate = mktime(0,-1,0,date('m',$udate),date('d',$udate)+1,date('Y',$udate));
-				$udate = self::addDate($udate,$h,$n,0,$m,$d,$y);
-			}
-			$date = self::toSqlDateTime($udate);
-		}
-		return $date;
-	}
-
-	/**
-	 * Format Unix timestamp to iCal date-time format
-	 *
-	 * @param int $datetime Unix timestamp
-	 *
-	 * @return string iCal date-time string
-	 */
-	static function toiCalDateTime($datetime = null){
-		date_default_timezone_set('UTC');
-		if($datetime == null)
-			$datetime = time();
-		return gmdate("Ymd\THis",$datetime);
-	}
-
-	/**
-	 * Format Unix timestamp to iCal date format
-	 *
-	 * @param int $datetime Unix timestamp
-	 *
-	 * @return string iCal date-time string
-	 */
-	static function toiCalDate($datetime = null){
-		date_default_timezone_set('UTC');
-		if($datetime == null)
-			$datetime = time();
-		return gmdate("Ymd",$datetime);
-	}
-}

src/lib/includes/framework.php

@@ -1,32 +0,0 @@
-<?php
-/**
- * framework.php - framework file
- *
- * @package	ZapCalLib
- * @author	Dan Cogliano <http://zcontent.net>
- * @copyright   Copyright (C) 2006 - 2017 by Dan Cogliano
- * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
- * @link	http://icalendar.org/php-library.html
- */
-
-// No direct access
-defined('_ZAPCAL') or die( 'Restricted access' );
-
-/**
- * set MAXYEAR to 2036 for 32 bit systems, can be higher for 64 bit systems
- *
- * @var integer
- */
-define('_ZAPCAL_MAXYEAR', 2036);
-
-/**
- * set MAXREVENTS to maximum # of repeating events 
- *
- * @var integer
- */
-define('_ZAPCAL_MAXREVENTS', 5000);
-
-require_once(_ZAPCAL_BASE . '/includes/date.php');
-require_once(_ZAPCAL_BASE . '/includes/recurringdate.php');
-require_once(_ZAPCAL_BASE . '/includes/ical.php');
-require_once(_ZAPCAL_BASE . '/includes/timezone.php');

src/lib/includes/ical.php

@@ -1,986 +0,0 @@
-<?php
-/**
- * ical.php	create iCalendar data structure
- *
- * @package	ZapCalLib
- * @author	Dan Cogliano <http://zcontent.net>
- * @copyright   Copyright (C) 2006 - 2017 by Dan Cogliano
- * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
- * @link	http://icalendar.org/php-library.html
- */
-
-// No direct access
-defined('_ZAPCAL') or die( 'Restricted access' );
-
-/**
- * Object for storing an unfolded iCalendar line
- *
- * The ZCiCalDataNode class contains data from an unfolded iCalendar line
- *
- */
-class ZCiCalDataNode {
-	/**
-	 * The name of the node
-	 *
-	 * @var string
-	 */
-	var $name = "";
-
-	/**
-	 * Node parameters (before the colon ":")
-	 *
-	 * @var array
-	 */
-	var $parameter=array();
-
-	/**
-	 * Node values (after the colon ":")
-	 * 
-	 * @var array
-	 */
-	var $value=array();
-
-	/**
- 	 * Create an object from an unfolded iCalendar line
- 	 *
- 	 * @param string $line An unfolded iCalendar line
- 	 *
- 	 * @return void
- 	 *
- 	 */
-	function __construct( $line ) {
-		//echo "ZCiCalDataNode($line)<br/>\n";
-		//separate line into parameters and value
-		// look for colon separating name or parameter and value
-		// first change any escaped colons temporarily to make it easier
-		$tline = str_replace("\\:", "`~", $line);
-		// see if first colon is inside a quoted string
-		$i = 0;
-		$datafind = false;
-		$inquotes = false;
-		while(!$datafind && ($i < strlen($tline))) {
-			//echo "$i: " . $tline[$i] . ", ord() = " . ord($tline{$i}) . "<br>\n";
-			if(!$inquotes && $tline[$i] == ':')
-				$datafind=true;
-			else{
-				$i += 1;
-				if(substr($tline,$i,1) == '"')
-					$inquotes = !$inquotes;
-			}
-		}
-		if($datafind){
-			$value = str_replace("`~","\\:",substr($line,$i+1));
-			// fix escaped characters (don't see double quotes in spec but Apple apparently uses it in iCal)
-			$value = str_replace(array('\\N' , '\\n', '\\"' ), array("\n", "\n" , '"'), $value);
-			$tvalue = str_replace("\\,", "`~", $value);
-			//echo "value: " . $tvalue . "<br>\n";
-			$tvalue = explode(",",$tvalue);
-			$value = str_replace("`~","\\,",$tvalue);
-			$this->value = $value;
-		}
-
-		$parameter = trim(substr($line,0,$i));
-
-		$parameter = str_replace("\\;", "`~", $parameter);
-		$parameters = explode(";", $parameter);
-		$parameters = str_replace("`~", "\\;", $parameters);
-		$this->name = array_shift($parameters);
-		foreach($parameters as $parameter){
-			$pos = strpos($parameter,"=");
-			if($pos > 0){
-				$param = substr($parameter,0,$pos);
-				$paramvalue = substr($parameter,$pos+1);
-				$tvalue = str_replace("\\,", "`~", $paramvalue);
-				//$tvalue = explode(",",$tvalue);
-				$paramvalue = str_replace("`~","\\,",$tvalue);
-				$this->parameter[strtolower($param)] = $paramvalue;
-				//$this->paramvalue[] = $paramvalue;
-			}
-		}
-	}
-
-/**
- * getName()
- *
- * Return the name of the object
- *
- * @return string
- */
-	function getName(){
-		return $this->name;
-	}
-
-/**
- * Get $ith parameter from array
- * @param int $i
- * 
- * @return var
- */
-	function getParameter($i){
-		return $this->parameter[$i];
-	}
-
-/**
- * Get parameter array
- *
- * @return array
- */
-	function getParameters(){
-		return $this->parameter;
-	}
-
-/**
- * Get comma separated values
- * 
- * @return string
- */
-	function getValues(){
-		return implode(",",$this->value);
-	}
-}
-
-/**
- * Object for storing a list of unfolded iCalendar lines (ZCiCalDataNode objects)
- *
- * @property object $parentnode Parent of this node
- *
- * @property array $child Array of children for this node
- *
- * @property data $data Array of data for this node
- *
- * @property object $next Next sibling of this node
- *
- * @property object $prev Previous sibling of this node
- */
-
-class ZCiCalNode {
-	/**
-	 * The name of the node
-	 *
-	 * @var string
-	 */
-	var $name="";
-
-	/**
-	 * The parent of this node
-	 *
-	 * @var object
-	 */
-	var $parentnode=null;
-
-	/**
-	 * Array of children for this node
-	 *
-	 * @var array
-	 */
-	var $child= array();
-
-	/**
-	 * Array of $data for this node
-	 *
-	 * @var array
-	 */
-	var $data= array();
-
-
-	/**
-	 * Next sibling of this node
-	 *
-	 * @var object
-	 */
-	var $next=null;
-
-	/**
-	 * Previous sibling of this node
-	 *
-	 * @var object
-	 */
-	var $prev=null;
-
-	/**
-	 * Create ZCiCalNode
-	 *
-	 * @param string $_name Name of node
-	 *
-	 * @param object $_parent Parent node for this node
-	 *
-	 * @param bool $first Is this the first child for this parent?
-	 */
-	function __construct( $_name, & $_parent, $first = false) {
-		$this->name = $_name;
-		$this->parentnode = $_parent;
-		if($_parent != null){
-			if(count($this->parentnode->child) > 0) {
-				if($first)
-				{
-					$first = & $this->parentnode->child[0];
-					$first->prev = & $this;
-					$this->next = & $first;
-				}
-				else
-				{
-					$prev =& $this->parentnode->child[count($this->parentnode->child)-1];
-					$prev->next =& $this;
-					$this->prev =& $prev;
-				}
-			}
-			if($first)
-			{
-				array_unshift($this->parentnode->child, $this);
-			}
-			else
-			{
-				$this->parentnode->child[] =& $this;
-			}
-		}
-		/*
-		echo "creating " . $this->getName();
-		if($_parent != null)
-			echo " child of " . $_parent->getName() . "/" . count($this->parentnode->child);
-		echo "<br/>";
-		*/
-	}
-
-	/**
- 	* Return the name of the object
- 	*
- 	* @return string
- 	*/
-	function getName() {
-		return $this->name;
-	}
-
-	/**
- 	* Add node to list
- 	*
- 	* @param object $node
- 	*
- 	*/
-	function addNode($node) {
-		if(array_key_exists($node->getName(), $this->data))
-		{
-			if(!is_array($this->data[$node->getName()]))
-			{
-				$this->data[$node->getName()] = array($this->data[$node->getName()]);
-			}
-			$this->data[$node->getName()][] = $node;
-		}
-		else
-		{
-			$this->data[$node->getName()] = $node;
-		}
-	}
-
-	/**
-	 * Get Attribute
-	 *
-	 * @param int $i array id of attribute to get
-	 *
-	 * @return string
-	 */
-	function getAttrib($i) {
-		return $this->attrib[$i];
-	}
-
-	/**
-	 * Set Attribute
-	 *
-	 * @param string $value value of attribute to set
-	 *
-	 */
-	function setAttrib($value) {
-		$this->attrib[] = $value;
-	}
-
-	/**
-	 * Get the parent object of this object
-	 *
-	 * @return object parent of this object
-	 */
-	function &getParent() {
-		return $this->parentnode;
-	}
-
-	/**
-	 * Get the first child of this object
-	 *
-	 * @return object The first child
-	 */
-	function &getFirstChild(){
-		static $nullguard = null;
-		if(count($this->child) > 0) {
-			//echo "moving from " . $this->getName() . " to " . $this->child[0]->getName() . "<br/>";
-			return $this->child[0];
-		}
-		else
-			return $nullguard;
-	}
-
-	/**
- 	* Print object tree in HTML for debugging purposes
- 	*
- 	* @param object $node select part of tree to print, or leave blank for full tree
- 	*
- 	* @param int $level Level of recursion (usually leave this blank)
- 	*
- 	* @return string - HTML formatted display of object tree
- 	*/
-	function printTree(& $node=null, $level=1){
-		$level += 1;
-		$html = "";
-		if($node == null)
-			$node = $this->parentnode;
-		if($level > 5)
-		{
-			die("levels nested too deep<br/>\n");
-			//return;
-		}
-		for($i = 0 ; $i < $level; $i ++)
-			$html .= "+";
-		$html .= $node->getName() . "<br/>\n";
-		foreach ($node->child as $c){
-			$html .= $node->printTree($c,$level);
-		}
-		$level -= 1;
-		return $html;
-	}
-
-	/**
-	 * export tree to icalendar format
-	 *
-	 * @param object $node Top level node to export
-	 * 
-	 * @param int $level Level of recursion (usually leave this blank)
-	 *
-	 * @return string iCalendar formatted output
-	 */
-	function export(& $node=null, $level=0){
-		$txtstr = "";
-		if($node == null)
-			$node = $this;
-		if($level > 5)
-		{
-			//die("levels nested too deep<br/>\n");
-			throw new Exception("levels nested too deep");
-		}
-		$txtstr .= "BEGIN:" . $node->getName() . "\r\n";
-		if(property_exists($node,"data"))
-		foreach ($node->data as $d){
-			if(is_array($d))
-			{
-				foreach ($d as $c)
-				{
-					//$txtstr .= $node->export($c,$level + 1);
-					$p = "";
-					$params = @$c->getParameters();
-					if(count($params) > 0)
-					{
-						foreach($params as $key => $value){
-							$p .= ";" . strtoupper($key) . "=" . $value;
-						}
-					}
-					$txtstr .= $this->printDataLine($c, $p);
-				}
-			}
-			else
-			{
-			$p = "";
-			$params = @$d->getParameters();
-			if(count($params) > 0)
-			{
-				foreach($params as $key => $value){
-					$p .= ";" . strtoupper($key) . "=" . $value;
-				}
-			}
-			$txtstr .= $this->printDataLine($d, $p);
-			/*
-			$values = $d->getValues();
-			// don't think we need this, Sunbird does not like it in the EXDATE field
-			//$values = str_replace(",", "\\,", $values);
-
-			$line = $d->getName() . $p . ":" . $values;
-			$line = str_replace(array("<br>","<BR>","<br/>","<BR/"),"\\n",$line);
-			$line = str_replace(array("\r\n","\n\r","\n","\r"),'\n',$line);
-			//$line = str_replace(array(',',';','\\'), array('\\,','\\;','\\\\'),$line);
-			//$line =strip_tags($line);
-			$linecount = 0;
-			while (strlen($line) > 0) {
-				$linewidth = ($linecount == 0? 75 : 74);
-				$linesize = (strlen($line) > $linewidth? $linewidth: strlen($line));
-				if($linecount > 0)
-					$txtstr .= " ";
-				$txtstr .= substr($line,0,$linesize) . "\r\n";
-				$linecount += 1;
-				$line = substr($line,$linewidth);
-			}
-			*/
-			}
-			//echo $line . "\n";
-		}
-		if(property_exists($node,"child"))
-		foreach ($node->child as $c){
-			$txtstr .= $node->export($c,$level + 1);
-		}
-		$txtstr .= "END:" . $node->getName() . "\r\n";
-		return $txtstr;
-	}
-
-	/**
- 	* print an attribute line
-
-	* @param object $d attributes
-	* @param object $p properties
- 	*
-	*/
-	function printDataLine($d, $p)
-	{
-		$txtstr = "";
-	
-		$values = $d->getValues();
-		// don't think we need this, Sunbird does not like it in the EXDATE field
-		//$values = str_replace(",", "\\,", $values);
-
-		$line = $d->getName() . $p . ":" . $values;
-		$line = str_replace(array("<br>","<BR>","<br/>","<BR/"),"\\n",$line);
-		$line = str_replace(array("\r\n","\n\r","\n","\r"),'\n',$line);
-		//$line = str_replace(array(',',';','\\'), array('\\,','\\;','\\\\'),$line);
-		//$line =strip_tags($line);
-		$linecount = 0;
-		while (strlen($line) > 0) {
-			$linewidth = ($linecount == 0? 75 : 74);
-			$linesize = (strlen($line) > $linewidth? $linewidth: strlen($line));
-			if($linecount > 0)
-				$txtstr .= " ";
-			$txtstr .= substr($line,0,$linesize) . "\r\n";
-			$linecount += 1;
-			$line = substr($line,$linewidth);
-		}
-		return $txtstr;
-	}
-}
-
-/**
- *
- * The main iCalendar object containing ZCiCalDataNodes and ZCiCalNodes.
- *
-*/
-class ZCiCal {
-	/**
-	 * The root node of the object tree
-	 *
-	 * @var object
-	 */
-	var $tree=null;
-	/**
-	 * The most recently created  node in the tree 
-	 *
-	 * @var object
-	 */
-	var $curnode=null;
-
-/**
- * The main iCalendar object containing ZCiCalDataNodes and ZCiCalNodes.
- *
- * use maxevents and startevent to read events in multiple passes (to save memory)
- *
- * @param string $data icalendar feed string (empty if creating new feed)
- *
- * @param int $maxevents maximum # of events to read
- *
- * @param int $startevent starting event to read
- *
- * @return void
- *
-*
-*/
-function __construct($data = "", $maxevents = 1000000, $startevent = 0) {
-
-	if($data != ""){
-		// unfold lines
-		// first change all eol chars to "\n"
-		$data = str_replace(array("\r\n", "\n\r", "\n", "\r"), "\n", $data);
-		// now unfold lines
-		//$data = str_replace(array("\n ", "\n	"),"!?", $data);
-		$data = str_replace(array("\n ", "\n	"),"", $data);
-		// replace special iCal chars
-		$data = str_replace(array("\\\\","\,"),array("\\",","), $data);
-
-		// parse each line
-		$lines = explode("\n", $data);
-
-		$linecount = 0;
-		$eventcount = 0;
-		$eventpos = 0;
-		foreach($lines as $line) {
-			//$line = str_replace("!?", "\n", $line); // add nl back into descriptions
-			// echo ($linecount + 1) . ": " . $line . "<br/>";
-			if(substr($line,0,6) == "BEGIN:") {
-				// start new object
-				$name = substr($line,6);
-				if($name == "VEVENT")
-				{
-					if($eventcount < $maxevents && $eventpos >= $startevent)
-					{
-						$this->curnode = new ZCiCalNode($name, $this->curnode);
-						if($this->tree == null)
-							$this->tree = $this->curnode;
-					}
-				}
-				else
-				{
-					$this->curnode = new ZCiCalNode($name, $this->curnode);
-					if($this->tree == null)
-						$this->tree = $this->curnode;
-				}
-				//echo "new node: " . $this->curnode->name . "<br/>\n";
-				/*
-				if($this->curnode->getParent() != null)
-					echo "parent of " . $this->curnode->getName() . " is " . $this->curnode->getParent()->getName() . "<br/>";
-				else
-					echo "parent of " . $this->curnode->getName() . " is null<br/>";
-				*/
-			}
-			else if(substr($line,0,4) == "END:") {
-				$name = substr($line,4);
-				if($name == "VEVENT")
-				{
-					if($eventcount < $maxevents && $eventpos >= $startevent)
-					{
-						$eventcount++;
-						if($this->curnode->getName() != $name) {
-							//panic, mismatch in iCal structure
-							//die("Can't read iCal file structure, expecting " . $this->curnode->getName() . " but reading $name instead");
-							throw new Exception("Can't read iCal file structure, expecting " . $this->curnode->getName() . " but reading $name instead");
-						}
-						if($this->curnode->getParent() != null) {
-							//echo "moving up from " . $this->curnode->getName() ;
-							$this->curnode = & $this->curnode->getParent();
-							//echo " to " . $this->curnode->getName() . "<br/>";
-							//echo $this->curnode->getName() . " has " . count($this->curnode->child) . " children<br/>";
-						}
-					}
-					$eventpos++;
-				}
-				else
-				{
-					if($this->curnode->getName() != $name) {
-						//panic, mismatch in iCal structure
-						//die("Can't read iCal file structure, expecting " . $this->curnode->getName() . " but reading $name instead");
-						throw new Exception("Can't read iCal file structure, expecting " . $this->curnode->getName() . " but reading $name instead");
-					}
-					if($this->curnode->getParent() != null) {
-						//echo "moving up from " . $this->curnode->getName() ;
-						$this->curnode = & $this->curnode->getParent();
-						//echo " to " . $this->curnode->getName() . "<br/>";
-						//echo $this->curnode->getName() . " has " . count($this->curnode->child) . " children<br/>";
-					}
-				}
-			}
-			else {
-				$datanode = new ZCiCalDataNode($line);
-				if($this->curnode->getName() == "VEVENT")
-				{
-					if($eventcount < $maxevents && $eventpos >= $startevent)
-					{
-						if($datanode->getName() == "EXDATE")
-						{
-							if(!array_key_exists($datanode->getName(),$this->curnode->data))
-							{
-								$this->curnode->data[$datanode->getName()] = $datanode;
-							}
-							else
-							{
-								$this->curnode->data[$datanode->getName()]->value[] = $datanode->value[0];
-							}
-						}
-						else
-						{
-							if(!array_key_exists($datanode->getName(),$this->curnode->data))
-							{
-								$this->curnode->data[$datanode->getName()] = $datanode;
-							}
-							else
-							{
-								$tnode = $this->curnode->data[$datanode->getName()];
-								$this->curnode->data[$datanode->getName()] = array();
-								$this->curnode->data[$datanode->getName()][] = $tnode;
-								$this->curnode->data[$datanode->getName()][] = $datanode;
-							}
-						}
-					}
-				}
-				else
-				{
-					if($datanode->getName() == "EXDATE")
-					{
-						if(!array_key_exists($datanode->getName(),$this->curnode->data))
-						{
-							$this->curnode->data[$datanode->getName()] = $datanode;
-						}
-						else
-						{
-							$this->curnode->data[$datanode->getName()]->value[] = $datanode->value[0];
-						}
-					}
-					else
-					{
-						if(!array_key_exists($datanode->getName(),$this->curnode->data))
-						{
-							$this->curnode->data[$datanode->getName()] = $datanode;
-						}
-						else
-						{
-							$tnode = $this->curnode->data[$datanode->getName()];
-							$this->curnode->data[$datanode->getName()] = array();
-							$this->curnode->data[$datanode->getName()][] = $tnode;
-							$this->curnode->data[$datanode->getName()][] = $datanode;
-						}
-					}
-				}
-			}
-			$linecount++;
-		}
-	}
-	else {
-				$name = "VCALENDAR";
-				$this->curnode = new ZCiCalNode($name, $this->curnode);
-				$this->tree = $this->curnode;
-				$datanode = new ZCiCalDataNode("VERSION:2.0");
-				$this->curnode->data[$datanode->getName()] = $datanode;
-
-				$datanode = new ZCiCalDataNode("PRODID:-//ZContent.net//ZapCalLib 1.0//EN");
-				$this->curnode->data[$datanode->getName()] = $datanode;
-				$datanode = new ZCiCalDataNode("CALSCALE:GREGORIAN");
-				$this->curnode->data[$datanode->getName()] = $datanode;
-				$datanode = new ZCiCalDataNode("METHOD:PUBLISH");
-				$this->curnode->data[$datanode->getName()] = $datanode;
-	}
-}
-
-/**
- * CountEvents()
- *
- * Return the # of VEVENTs in the object
- *
- * @return int
- */
-
-function countEvents() {
-	$count = 0;
-	if(isset($this->tree->child)){
-		foreach($this->tree->child as $child){
-			if($child->getName() == "VEVENT")
-				$count++;
-		}
-	}
-	return $count;
-}
-
-/**
- * CountVenues()
- *
- * Return the # of VVENUEs in the object
- *
- * @return int
- */
-
-function countVenues() {
-	$count = 0;
-	if(isset($this->tree->child)){
-		foreach($this->tree->child as $child){
-			if($child->getName() == "VVENUE")
-				$count++;
-		}
-	}
-	return $count;
-}
-
-/**
- * Export object to string
- *
- * This function exports all objects to an iCalendar string
- *
- * @return string an iCalendar formatted string
- */
-
-function export() {
-	return $this->tree->export($this->tree);
-}
-
-/**
- * Get first event in object list
- * Use getNextEvent() to navigate through list
- *
- * @return object The first event, or null
- */
-function &getFirstEvent() {
-	static $nullguard = null;
-	if ($this->countEvents() > 0){
-		$child = $this->tree->child[0];
-		$event=false;
-		while(!$event && $child != null){
-			if($child->getName() == "VEVENT")
-				$event = true;
-			else
-				$child = $child->next;
-		}
-		return $child;
-	}
-	else
-		return $nullguard;
-}
-
-/**
- * Get next event in object list
- *
- * @param object $event The current event object
- *
- * @return object Returns the next event or null if past last event
- */
-function &getNextEvent($event){
-	do{
-		$event = $event->next;
-	} while($event != null && $event->getName() != "VEVENT");
-	return $event;
-}
-
-/**
- * Get first venue in object list
- * Use getNextVenue() to navigate through list
- *
- * @return object The first venue, or null
- */
-function &getFirstVenue() {
-	static $nullguard = null;
-	if ($this->countVenues() > 0){
-		$child = $this->tree->child[0];
-		$event=false;
-		while(!$event && $child != null){
-			if($child->getName() == "VVENUE")
-				$event = true;
-			else
-				$child = $child->next;
-		}
-		return $child;
-	}
-	else
-		return $nullguard;
-}
-
-/**
- * Get next venue in object list
- *
- * @param object $venue The current venue object
- *
- * @return object Returns the next venue or null if past last venue
- */
-function &getNextVenue($venue){
-	do{
-		$venue = $venue->next;
-	} while($venue != null && $venue->getName() != "VVENUE");
-	return $venue;
-}
-
-/**
- * Get first child in object list
- * Use getNextSibling() and getPreviousSibling() to navigate through list
- *
- * @param object $thisnode The parent object
- *
- * @return object The child object
- */
-function &getFirstChild(& $thisnode){
-	$nullvalue = null;
-	if(count($thisnode->child) > 0) {
-		//echo "moving from " . $thisnode->getName() . " to " . $thisnode->child[0]->getName() . "<br/>";
-		return $thisnode->child[0];
-	}
-	else
-		return $nullvalue;
-}
-
-/**
- * Get next sibling in object list
- *
- * @param object $thisnode The current object
- *
- * @return object Returns the next sibling
- */
-function &getNextSibling(& $thisnode){
-	return $thisnode->next;
-}
-
-/**
- * Get previous sibling in object list
- *
- * @param object $thisnode The current object
- *
- * @return object Returns the previous sibling
- */
-function &getPrevSibling(& $thisnode){
-	return $thisnode->prev;
-}
-
-/**
- * Read date/time in iCal formatted string
- *
- * @param string iCal formated date/time string
- *
- * @return int Unix timestamp
- * @deprecated Use ZDateHelper::toUnixDateTime() instead
- */
-
-function toUnixDateTime($datetime){
-	$year = substr($datetime,0,4);
-	$month = substr($datetime,4,2);
-	$day = substr($datetime,6,2);
-	$hour = 0;
-	$minute = 0;
-	$second = 0;
-	if(strlen($datetime) > 8 && $datetime[8] == "T") {
-		$hour = substr($datetime,9,2);
-		$minute = substr($datetime,11,2);
-		$second = substr($datetime,13,2);
-	}
-	$d1 = mktime($hour, $minute, $second, $month, $day, $year);
-
-}
-
-/**
- * fromUnixDateTime()
- * 
- * Take Unix timestamp and format to iCal date/time string
- *
- * @param int $datetime Unix timestamp, leave blank for current date/time
- *
- * @return string formatted iCal date/time string
- * @deprecated Use ZDateHelper::fromUnixDateTimetoiCal() instead
- */
-
-static function fromUnixDateTime($datetime = null){
-	date_default_timezone_set('UTC');
-	if($datetime == null)
-		$datetime = time();
-	return date("Ymd\THis",$datetime);
-}
-
-
-/**
- * fromUnixDate()
- * 
- * Take Unix timestamp and format to iCal date string
- *
- * @param int $datetime Unix timestamp, leave blank for current date/time
- *
- * @return string formatted iCal date string
- * @deprecated Use ZDateHelper::fromUnixDateTimetoiCal() instead
- */
-
-static function fromUnixDate($datetime = null){
-	date_default_timezone_set('UTC');
-	if($datetime == null)
-		$datetime = time();
-	return date("Ymd",$datetime);
-}
-
-/**
- * Format into iCal time format from SQL date or SQL date-time format
- * 
- * @param string $datetime SQL date or SQL date-time string
- *
- * @return string iCal formatted string
- * @deprecated Use ZDateHelper::fromSqlDateTime() instead
- */
-static function fromSqlDateTime($datetime = ""){
-	if($datetime == "")
-		$datetime = ZDateHelper::toSqlDateTime();
-	if(strlen($datetime) > 10)
-		return sprintf('%04d%02d%02dT%02d%02d%02d',substr($datetime,0,4),substr($datetime,5,2),substr($datetime,8,2),
-			substr($datetime,11,2),substr($datetime,14,2),substr($datetime,17,2));
-	else
-		return sprintf('%04d%02d%02d',substr($datetime,0,4),substr($datetime,5,2),substr($datetime,8,2));
-}
-
-/**
- * Format iCal time format to either SQL date or SQL date-time format
- * 
- * @param string $datetime icalendar formatted date or date-time
- * @return string SQL date or SQL date-time string
- * @deprecated Use ZDateHelper::toSqlDateTime() instead
- */
-static function toSqlDateTime($datetime = ""){
-	if($datetime == "")
-		return ZDateHelper::toSqlDateTime();
-	if(strlen($datetime) > 10)
-		return sprintf('%04d-%02d-%02d %02d:%02d:%02d',substr($datetime,0,4),substr($datetime,5,2),substr($datetime,8,2),
-			substr($datetime,11,2),substr($datetime,14,2),substr($datetime,17,2));
-	else
-		return sprintf('%04d-%02d-%02d',substr($datetime,0,4),substr($datetime,5,2),substr($datetime,8,2));
-}
-
-/**
- * Pull timezone data from node and put in array
- *
- * Returning array contains the following array keys: tzoffsetfrom, tzoffsetto, tzname, dtstart, rrule
- *
- * @param array $node timezone object
- *
- * @return array
- */
-static function getTZValues($node){
-	$tzvalues = array();
-
-	$tnode = @$node->data['TZOFFSETFROM'];
-	if($tnode != null){
-		$tzvalues["tzoffsetfrom"] = $tnode->getValues();
-	}
-
-	$tnode = @$node->data['TZOFFSETTO'];
-	if($tnode != null){
-		$tzvalues["tzoffsetto"] = $tnode->getValues();
-	}
-
-	$tnode = @$node->data['TZNAME'];
-	if($tnode != null){
-		$tzvalues["tzname"] = $tnode->getValues();
-	}
-	else
-		$tzvalues["tzname"] = "";
-
-	$tnode = @$node->data['DTSTART'];
-	if($tnode != null){
-		$tzvalues["dtstart"] = ZDateHelper::fromiCaltoUnixDateTime($tnode->getValues());
-	}
-
-	$tnode = @$node->data['RRULE'];
-	if($tnode != null){
-		$tzvalues["rrule"] = $tnode->getValues();
-		//echo "rule: " . $tzvalues["rrule"] . "<br/>\n";
-	}
-	else{
-		// no rule specified, let's create one from based on the date
-		$date = getdate($tzvalues["dtstart"]);
-		$month = $date["mon"];
-		$day = $date["mday"];
-		$tzvalues["rrule"] = "FREQ=YEARLY;INTERVAL=1;BYMONTH=$month;BYMONTHDAY=$day";
-	}
-
-	return $tzvalues;
-}
-
-/**
- * Escape slashes, commas and semicolons in strings
- *
- * @param string $content
- *
- * @return string
- */
-static function formatContent($content)
-{
-	$content = str_replace(array('\\' , ',' , ';' ), array('\\\\' , '\\,' , '\\;' ),$content);
-	return $content;
-}
-
-}
-
-?>

src/lib/includes/index.html

@@ -1,6 +0,0 @@
-<html>
-<head>
-</head>
-<body>
-</body>
-</html>

src/lib/includes/recurringdate.php

@@ -1,796 +0,0 @@
-<?php
-/**
- * recurringdate.php - create list of dates from recurring rule
- * 
- * @package	ZapCalLib
- * @author	Dan Cogliano <http://zcontent.net>
- * @copyright   Copyright (C) 2006 - 2017 by Dan Cogliano
- * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
- * @link	http://icalendar.org/php-library.html
- */
-
-// No direct access
-defined('_ZAPCAL') or die( 'Restricted access' );
-
-/**
- * Zap Calendar Recurring Date Helper Class
- *
- * Class to expand recurring rule to a list of dates
- */
-class ZCRecurringDate {
-	/**
-	 * rules string
-	 *
-	 * @var string
-	 */
-	var $rules = "";
-
-	/**
-	 * start date in Unix Timestamp format (local timezone)
-	 *
-	 * @var integer
-	 */
-	var $startdate = null;
-
-	/**
-	 * repeating frequency type (i.e. "y" for yearly, "m" for monthly)
-	 *
-	 * @var string
-	 */
-	var $freq = null;
-
-	/**
-	 * timezone of event (using PHP timezones)
-	 *
-	 * @var string
-	 */
-	var $tzid = null;
-
-	/**
-	 * repeat mode ('c': count, 'u': until)
-	 *
-	 * @var string
-	 */
-	var $repeatmode=null;
-
-	/**
-	 * repeat until date (in UTC Unix Timestamp format)
-	 *
-	 * @var integer
-	 */
-	var $until=null;
-
-	/**
-	 * repeat count when repeat mode is 'c'
-	 * 
-	 * @var integer
-	 */
-	var $count=0;
-
-	/**
-	 * array of repeat by seconds values
-	 *
-	 * @var array
-	 */
-	var $bysecond=array();
-
-	/**
-	 * array of repeat by minutes values
-	 *
-	 * @var array
-	 */
-	var $byminute=array();
-
-	/**
-	 * array of repeat by hour values
-	 *
-	 * @var array
-	 */
-	var $byhour=array();
-
-	/**
-	 * array of repeat by day values
-	 *
-	 * @var array
-	 */
-	var $byday=array();
-
-	/**
-	 * array of repeat by month day values
-	 *
-	 * @var array
-	 */
-	var $bymonthday=array();
-
-	/**
-	 * array of repeat by month values
-	 *
-	 * @var array
-	 */
-	var $bymonth=array();
-
-	/**
-	 * array of repeat by year values
-	 *
-	 * @var array
-	 */
-	var $byyear=array();
-
-	/**
-	 * array of repeat by setpos values
-	 *
-	 * @var array
-	 */
-	var $bysetpos=array();
-
-	/**
-	 * inteval of repeating event (i.e. every 2 weeks, every 6 months)
-	 *
-	 * @var integer
-	 */
-	var $interval = 1;
-
-	/**
-	 * debug level (for testing only)
-	 *
-	 * @var integer
-	 */
-	var $debug = 0;
-
-	/**
-	 * error string (future use)
-	 *
-	 * @var string
-	 */
-	var $error;
-
-	/**
-	 * array of exception dates in Unix Timestamp format (UTC dates)
-	 *
-	 * @var array
-	 */
-	var $exdates=array();
-	
-/**
- * Expand recurring rule to a list of dates
- *
- * @param string $rules iCalendar rules string
- * @param integer $startdate start date in Unix Timestamp format
- * @param array $exdates array of exception dates
- * @param string $tzid timezone of event (using PHP timezones)
- */
-	function __construct($rules, $startdate, $exdates = array(),$tzid = "UTC"){
-		if(strlen($rules) > 0){
-			//move exdates to event timezone for comparing with event date
-			for($i = 0; $i < count($exdates); $i++)
-			{
-				$exdates[$i] = ZDateHelper::toUnixDateTime(ZDateHelper::toLocalDateTime(ZDateHelper::toSQLDateTime($exdates[$i]),$tzid));
-			}
-	
-			$rules=str_replace("\'","",$rules);
-			$this->rules = $rules;
-			if($startdate == null){
-				// if not specified, use start date of beginning of last year
-				$tdate=getdate();
-				$startdate=mktime(0,0,0,1,1,$tdate["year"] - 1);
-			}
-			$this->startdate = $startdate;
-			$this->tzid = $tzid;
-			$this->exdates = $exdates;
-	
-			$rules=explode(";", $rules);
-			$ruletype = "";
-			foreach($rules as $rule){
-				$item=explode("=",$rule);
-				//echo $item[0] . "=" . $item[1] . "<br/>\n";
-				switch($item[0]){
-					case "FREQ":
-						switch($item[1]){
-							case "YEARLY":
-								$this->freq="y";
-								break;
-							case "MONTHLY":
-								$this->freq="m";
-								break;
-							case "WEEKLY":
-								$this->freq="w";
-								break;
-							case "DAILY":
-								$this->freq="d";
-								break;
-							case "HOURLY":
-								$this->freq="h";
-								break;
-							case "MINUTELY":
-								$this->freq="i";
-								break;
-							case "SECONDLY":
-								$this->freq="s";
-								break;
-						}
-						break;
-					case "INTERVAL":
-						$this->interval = $item[1];
-						break;
-					case "BYSECOND":
-						$this->bysecond = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "BYMINUTE":
-						$this->byminute = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "BYHOUR":
-						$this->byhour = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "BYDAY":
-						$this->byday = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "BYMONTHDAY":
-						$this->bymonthday = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "BYMONTH":
-						$this->bymonth = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "BYYEAR":
-						$this->byyear = explode(",",$item[1]);
-						$ruletype = $item[0];
-						break;
-					case "COUNT":
-						$this->count = intval($item[1]);
-						$this->repeatmode = "c";
-						break;
-					case "BYSETPOS":
-						$this->bysetpos = explode(",",$item[1]);
-						break;
-					case "UNTIL":
-						$this->until = ZDateHelper::fromiCaltoUnixDateTime($item[1]);
-						$this->repeatmode = "u";
-						break;
-				}
-			}
-			if(count($this->bysetpos) > 0){
-				switch($ruletype){
-					case "BYYEAR":
-						$this->byyear = $this->bySetPos($this->byyear,$this->bysetpos);
-						break;
-					case "BYMONTH":
-						$this->bymonth = $this->bySetPos($this->bymonth,$this->bysetpos);
-						break;
-					case "BYMONTHDAY":
-						$this->bymonthday = $this->bySetPos($this->bymonthday,$this->bysetpos);
-						break;
-					case "BYDAY":
-						$this->byday = $this->bySetPos($this->byday,$this->bysetpos);
-						break;
-					case "BYHOUR":
-						$this->byhour = $this->bySetPos($this->byhour,$this->bysetpos);
-						break;
-					case "BYMINUTE":
-						$this->byminute = $this->bySetPos($this->byminute,$this->bysetpos);
-						break;
-					case "BYSECOND":
-						$this->bysecond = $this->bySetPos($this->bysecond,$this->bysetpos);
-						break;
-				}
-			}
-		}
-	}
-	
-/**
- * bysetpos rule support
- *
- * @param array $bytype
- * @param array $bysetpos
- *
- * @return array
- */
-	function bySetPos($bytype, $bysetpos){
-		$result = array();
-		for($i=0; $i < count($bysetpos); $i++){
-			for($j=0; $j < count($bytype); $j++){
-				$result[] = $bysetpos[$i] . $bytype[$j];
-			}
-		}
-		return $result;
-	}
-
-/**
- * save error
- *
- * @param string $msg
- */	
-	function setError($msg){
-		$this->error = $msg;
-	}
-	
-/**
- * get error message
- *
- * @return string error message
- */
-	function getError(){
-		return $this->error;
-	}
-
-/**
- * set debug level (0: none, 1: minimal, 2: more output)
- *
- * @param integer $level
- *
- */
-	function setDebug($level)
-	{
-		$this->debug = $level;
-	}
-
-/**
- * display debug message
- *
- * @param integer $level
- * @param string $msg
- */
-	function debug($level, $msg){
-		if($this->debug >= $level)
-			echo $msg . "<br/>\n";
-	}
-	
-/**
- * Get repeating dates by year
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function byYear($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"byYear(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$count = 0;
-		if(count($this->byyear) > 0){
-			foreach($this->byyear as $year){
-				$t = getdate($startdate);
-				$wdate = mktime($t[hours],$t[minutes],$t[seconds],$t[month],$t[mday],$year);
-				if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-					$count = $this->byMonth($wdate, $enddate, $rdates, $tzid);
-					if($count == 0) {
-						$rdates[] = $wdate;
-						$count++;
-					}
-				}
-			}
-		}
-		else if(!$this->maxDates($rdates))
-			$count = $this->byMonth($startdate, $enddate, $rdates, $tzid);
-		self::debug(1,"byYear() returned " . $count );
-		return $count;
-	}
-	
-/**
- * Get repeating dates by month
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function byMonth($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"byMonth(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$count = 0;
-		if(count($this->bymonth) > 0){
-			foreach($this->bymonth as $month){
-				$t = getdate($startdate);
-				$wdate = mktime($t["hours"],$t["minutes"],$t["seconds"],$month,$t["mday"],$t["year"]);
-				if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-					$count = $this->byMonthDay($wdate, $enddate, $rdates, $tzid);
-					if($count == 0) {
-						$rdates[] = $wdate;
-						$count++;
-					}
-				}
-			}
-		}
-		else if(!$this->maxDates($rdates))
-			$count = $this->byMonthDay($startdate, $enddate, $rdates, $tzid);
-		self::debug(1,"byMonth() returned " . $count );
-		return $count;
-	}
-
-/**
- * Get repeating dates by month day
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function byMonthDay($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"byMonthDay(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$count = 0;
-		self::debug(1,"start date: " . ZDateHelper::toSqlDateTime($startdate));
-		if(count($this->bymonthday) > 0){
-			foreach($this->bymonthday as $day){
-				$day = intval($day);
-				$t = getdate($startdate);
-				$wdate = mktime($t['hours'],$t['minutes'],$t['seconds'],$t['mon'],$day,$t['year']);
-				self::debug(2,"mktime(" . $t['hours'] . ", " . $t['minutes']
-				. ", " . $t['mon'] . ", " . $day . ", " . $t['year'] . ") returned $wdate");
-				if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-					$count = $this->byDay($wdate, $enddate, $rdates, $tzid);
-					if($count == 0) {
-						$rdates[] = $wdate;
-						$count++;
-					}
-				}
-			}
-		}
-		else if(!$this->maxDates($rdates)) {
-			self::debug(1,"start date: " . ZDateHelper::toSqlDateTime($startdate));
-			$count = $this->byDay($startdate, $enddate, $rdates, $tzid);
-		}
-		self::debug(1,"byMonthDay() returned " . $count );
-		return $count;
-	}
-	
-/**
- * Get repeating dates by day
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function byDay($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"byDay(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$days = array(
-			"SU" => 0,
-			"MO" => 1,
-			"TU" => 2,
-			"WE" => 3,
-			"TH" => 4,
-			"FR" => 5,
-			"SA" => 6);
-		$idays = array(
-			0 => "SU",
-			1 => "MO",
-			2 => "TU",
-			3 => "WE",
-			4 => "TH",
-			5 => "FR",
-			6 => "SA");
-	
-		$count = 0;
-		if(count($this->byday) > 0){
-			if(empty($this->byday[0]))
-			{
-				$this->byday[0] = $idays[date("w",$startdate)];
-			}
-			foreach($this->byday as $tday){
-				$t = getdate($startdate);
-				$day = substr($tday,strlen($tday) - 2);
-				if(strlen($day) < 2)
-				{
-					// missing start day, use current date for DOW
-					$day = $idays[date("w",$startdate)];
-				}
-				if(strlen($tday) > 2) {
-					$imin = 1;
-					$imax = 5; // max # of occurances in a month
-					if(strlen($tday) > 2)
-						$imin = $imax = substr($tday,0,strlen($tday) - 2);
-					self::debug(2,"imin: $imin, imax: $imax, tday: $tday, day: $day, daynum: {$days[$day]}");
-					for($i = $imin; $i <= $imax; $i++){
-						$wdate = ZDateHelper::getDateFromDay($startdate,$i-1,$days[$day],$tzid);
-						self::debug(2,"getDateFromDay(" . ZDateHelper::toSqlDateTime($startdate)
-							. ",$i,{$days[$day]}) returned " . ZDateHelper::toSqlDateTime($wdate));
-						if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-							$count = $this->byHour($wdate, $enddate, $rdates);
-							if($count == 0){
-								$rdates[] = $wdate;
-								$count++;
-								//break;
-							}
-						}
-					}
-				}
-				else {
-					// day of week version
-					$startdate_dow = date("w",$startdate);
-					$datedelta = $days[$day] - $startdate_dow;
-					self::debug(2, "start_dow: $startdate_dow, datedelta: $datedelta");
-					if($datedelta >= 0)
-					{
-						$wdate = ZDateHelper::addDate($startdate,0,0,0,0,$datedelta,0,$this->tzid);
-						self::debug(2, "wdate: " . ZDateHelper::toSqlDateTime($wdate));
-						if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-							$count = $this->byHour($wdate, $enddate, $rdates);
-							if($count == 0){
-								$rdates[] = $wdate;
-								$count++;
-								self::debug(2,"adding date " . ZDateHelper::toSqlDateTime($wdate) );
-							}
-						}
-					}
-				}
-			}
-		}
-		else if(!$this->maxDates($rdates))
-			$count = $this->byHour($startdate, $enddate, $rdates);
-		self::debug(1,"byDay() returned " . $count );
-		return $count;
-	}
-
-/**
- * Get repeating dates by hour
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function byHour($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"byHour(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$count = 0;
-		if(count($this->byhour) > 0){
-			foreach($this->byhour as $hour){
-				$t = getdate($startdate);
-				$wdate = mktime($hour,$t["minutes"],$t["seconds"],$t["mon"],$t["mday"],$t["year"]);
-				self::debug(2,"checking date/time " . ZDateHelper::toSqlDateTime($wdate));
-				if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-					$count = $this->byMinute($wdate, $enddate, $rdates);
-					if($count == 0) {
-						$rdates[] = $wdate;
-						$count++;
-					}
-				}
-			}
-		}
-		else if(!$this->maxDates($rdates))
-			$count = $this->byMinute($startdate, $enddate, $rdates);
-		self::debug(1,"byHour() returned " . $count );
-		return $count;
-	}
-
-/**
- * Get repeating dates by minute
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function byMinute($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"byMinute(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$count = 0;
-		if(count($this->byminute) > 0){
-			foreach($this->byminute as $minute){
-				$t = getdate($startdate);
-				$wdate = mktime($t["hours"],$minute,$t["seconds"],$t["mon"],$t["mday"],$t["year"]);
-				if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-					$count = $this->bySecond($wdate, $enddate, $rdates);
-					if($count == 0) {
-						$rdates[] = $wdate;
-						$count++;
-					}
-				}
-			}
-		}
-		else if(!$this->maxDates($rdates))
-			$count = $this->bySecond($startdate, $enddate, $rdates);
-		self::debug(1,"byMinute() returned " . $count );
-		return $count;
-	}
-/**
- * Get repeating dates by second
- * 
- * @param integer $startdate start date of repeating events, in Unix timestamp format
- * @param integer $enddate end date of repeating events, in Unix timestamp format
- * @param array $rdates array to contain expanded repeating dates
- * @param string $tzid timezone of event (using PHP timezones)
- *
- * @return integer count of dates
- */
-	private function bySecond($startdate, $enddate, &$rdates, $tzid="UTC"){
-		self::debug(1,"bySecond(" . ZDateHelper::toSqlDateTime($startdate) . ","
-			. ZDateHelper::toSqlDateTime($enddate) . "," . count($rdates) . " dates)");
-		$count = 0;
-		if(count($this->bysecond) > 0){
-			foreach($this->bysecond as $second){
-				$t = getdate($startdate);
-				$wdate = mktime($t["hours"],$t["minutes"],$second,$t["mon"],$t["mday"],$t["year"]);
-				if($startdate <= $wdate && $wdate < $enddate && !$this->maxDates($rdates)){
-					$rdates[] = $wdate;
-					$count++;
-				}
-			}
-		}
-		self::debug(1,"bySecond() returned " . $count );
-		return $count;
-	}
-
-/**
- * Determine if the loop has reached the end date
- * 
- * @param array $rdates array of repeating dates
- *
- * @return boolean
- */	
-	private function maxDates($rdates){
-		if($this->repeatmode == "c" && count($rdates) >= $this->count)
-			return true; // exceeded count
-		else if(count($rdates) > 0 && $this->repeatmode == "u" && $rdates[count($rdates) - 1] > $this->until){
-			return true; //past date
-		}
-		return false;
-	}
-
-/**
- * Get array of dates from recurring rule
- *
- * @param $maxdate integer maximum date to appear in repeating dates in Unix timestamp format
- *
- * @return array
- */	
-	public function getDates($maxdate = null){
-		//$this->debug = 2;
-		self::debug(1,"getDates()");
-		$nextdate = $enddate = $this->startdate;
-		$rdates = array();
-		$done = false;
-		$eventcount = 0;
-		$loopcount = 0;
-		self::debug(2,"freq: " . $this->freq . ", interval: " . $this->interval);
-		while(!$done){
-			self::debug(1,"<b>*** Frequency ({$this->freq}) loop pass $loopcount ***</b>");
-			switch($this->freq){
-			case "y":
-				if($eventcount > 0)
-				{
-					$nextdate = ZDateHelper::addDate($nextdate,0,0,0,0,0,$this->interval,$this->tzid);
-					self::debug(2,"addDate() returned " . ZDateHelper::toSqlDateTime($nextdate));
-					if(!empty($this->byday)){
-						$t = getdate($nextdate);
-						$nextdate = gmmktime($t["hours"],$t["minutes"],$t["seconds"],$t["mon"],1,$t["year"]);
-					}
-					self::debug(2,"nextdate set to $nextdate (". ZDateHelper::toSQLDateTime($nextdate) . ")");
-				}
-				$enddate=ZDateHelper::addDate($nextdate,0,0,0,0,0,1);
-				break;
-			case "m":
-				if($eventcount > 0)
-				{
-					
-					$nextdate = ZDateHelper::addDate($nextdate,0,0,0,$this->interval,0,0,$this->tzid);
-					self::debug(2,"addDate() returned " . ZDateHelper::toSqlDateTime($nextdate));
-				}
-				if(count($this->byday) > 0)
-				{
-					$t = getdate($nextdate);
-					if($t["mday"] > 28)
-					{
-						//check for short months when using month by day, make sure we do not overshoot the counter and skip a month
-						$nextdate = ZDateHelper::addDate($nextdate,0,0,0,$this->interval,0,0,$this->tzid);
-						$t2 = getdate($nextdate);
-						if($t2["mday"] < $t["mday"])
-						{
-							// oops, skipped a month, backup to previous month
-							$nextdate = ZDateHelper::addDate($nextdate,0,0,0,0,$t2["mday"] - $t["mday"],0,$this->tzid);
-						}
-					}
-					$t = getdate($nextdate);
-					$nextdate = mktime($t["hours"],$t["minutes"],$t["seconds"],$t["mon"],1,$t["year"]);
-				}
-				self::debug(2,"nextdate set to $nextdate (". ZDateHelper::toSQLDateTime($nextdate) . ")");
-				$enddate=ZDateHelper::addDate($nextdate,0,0,0,$this->interval,0,0);
-				break;
-			case "w":
-				if($eventcount == 0)
-					$nextdate=$nextdate;
-				else {
-					$nextdate = ZDateHelper::addDate($nextdate,0,0,0,0,$this->interval*7,0,$this->tzid);
-					if(count($this->byday) > 0){
-						$dow = date("w", $nextdate);
-						// move to beginning of week (Sunday)
-						$bow = 0;
-						$diff = $bow - $dow;
-						if($diff > 0)
-							$diff = $diff - 7;
-						$nextdate = ZDateHelper::addDate($nextdate,0,0,0,0,$diff,0);
-					}
-					self::debug(2,"nextdate set to $nextdate (". ZDateHelper::toSQLDateTime($nextdate) . ")");
-				}
-				$enddate=ZDateHelper::addDate($nextdate,0,0,0,0,$this->interval*7,0);
-				break;
-			case "d":
-				$nextdate=($eventcount==0?$nextdate:
-					ZDateHelper::addDate($nextdate,0,0,0,0,$this->interval,0,$this->tzid));
-				$enddate=ZDateHelper::addDate($nextdate,0,0,0,0,1,0);
-				break;
-			}
-	
-			$count = $this->byYear($nextdate,$enddate,$rdates,$this->tzid);
-			$eventcount += $count;
-			if($maxdate > 0 && $maxdate < $nextdate)
-			{
-				array_pop($rdates);
-				$done = true;
-			}
-			else if($count == 0 && !$this->maxDates($rdates)){
-				$rdates[] = $nextdate;
-				$eventcount++;
-			}
-			if($this->maxDates($rdates))
-				$done = true;
-	
-			$year = date("Y", $nextdate);
-			if($year > _ZAPCAL_MAXYEAR)
-			{
-				$done = true;
-			}
-			$loopcount++;
-			if($loopcount > _ZAPCAL_MAXYEAR){
-				$done = true;
-				throw new Exception("Infinite loop detected in getDates()");
-			}
-		}
-		if($this->repeatmode == "u" && $rdates[count($rdates) - 1] > $this->until){
-			// erase last item
-			array_pop($rdates);
-		}
-		$count1 = count($rdates);
-		$rdates = array_unique($rdates);
-		$count2 = count($rdates);
-		$dups = $count1 - $count2;
-		$excount = 0;
-	
-		foreach($this->exdates as $exdate)
-		{
-			if($pos = array_search($exdate,$rdates))
-			{
-				array_splice($rdates,$pos,1);
-				$excount++;
-			}
-		}
-		self::debug(1,"getDates() returned " . count($rdates) . " dates, removing $dups duplicates, $excount exceptions");
-	
-	
-		if($this->debug >= 2)
-		{
-			self::debug(2,"Recurring Dates:");
-			foreach($rdates as $rdate)
-			{
-				$d = getdate($rdate);
-				self::debug(2,ZDateHelper::toSQLDateTime($rdate) . " " . $d["wday"] ); 
-			}
-			self::debug(2,"Exception Dates:");
-			foreach($this->exdates as $exdate)
-			{
-				self::debug(2, ZDateHelper::toSQLDateTime($exdate));
-			}
-			//exit;
-		}
-	
-		return $rdates;
-	}
-}

src/lib/includes/timezone.php

@@ -1,142 +0,0 @@
-<?php	
-/**
- * timezone.php - create timezone data for use in icalendar file
- * 
- * @package	ZapCalLib
- * @author	Dan Cogliano <http://zcontent.net>
- * @copyright   Copyright (C) 2006 - 2017 by Dan Cogliano
- * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
- * @link	http://icalendar.org/php-library.html
- */
-
-// No direct access
-defined('_ZAPCAL') or die( 'Restricted access' );
-
-/**
- * Zap Calendar Time Zone Helper Class
- *
- * Class to help create timezone section of iCalendar file
- *
- * @copyright   Copyright (C) 2006 - 2016 by Dan Cogliano
- * @license	 GNU General Public License version 2 or later; see LICENSE.txt
- */
-class ZCTimeZoneHelper {
-
-	/**
-	 * getTZNode creates VTIMEZONE section in an iCalendar file
-	 *
-	 * @param @startyear int start year of date range
-	 *
-	 * @param @endyear int end year of date range
-	 *
-	 * @param $tzid string PHP timezone, use underscore for multiple words (i.e. "New_York" for "New York")
-	 *
-	 * @param $parentnode object iCalendar object where VTIMEZONE will be created
-	 *
-	 * @return object return VTIMEZONE object
-	 */
-	static function getTZNode($startyear, $endyear, $tzid, $parentnode)
-	{
-		$tzmins = array();
-		$tzmaxs = array();
-		if(!array_key_exists($tzid,$tzmins) || $tzmins[$tzid] > $startyear)
-		{
-			$tzmins[$tzid] = $startyear;
-		}
-		if(!array_key_exists($tzid,$tzmaxs) || $tzmaxs[$tzid] < $endyear)
-		{
-			$tzmaxs[$tzid] = $endyear;
-		}
-
-		foreach(array_keys($tzmins) as $tzid)
-		{
-			$tmin = $tzmins[$tzid] - 1;
-			if(array_key_exists($tzid,$tzmaxs))
-			{
-				$tmax = $tzmaxs[$tzid] + 1;
-			}
-			else
-			{
-				$tmax = $tzmins[$tzid] + 1;
-			}
-			$tstart = gmmktime(0,0,0,1,1,$tmin);
-			$tend = gmmktime(23,59,59,12,31,$tmax);
-			$tz = new DateTimeZone($tzid);
-			$transitions = $tz->getTransitions($tstart,$tend);
-			$tzobj = new ZCiCalNode("VTIMEZONE", $parentnode, true);
-			$datanode = new ZCiCalDataNode("TZID:" . str_replace("_"," ",$tzid));
-			$tzobj->data[$datanode->getName()] = $datanode;
-			$count = 0;
-			$lasttransition = null;
-			if(count($transitions) == 1)
-			{
-				// not enough transitions found, probably UTC
-				// lets add fake transition at end for those systems that need it (i.e. Outlook)
-
-				$t2 = array();
-				$t2["isdst"] = $transitions[0]["isdst"];
-				$t2["offset"] = $transitions[0]["offset"];
-				$t2["ts"] = $tstart;
-				$t2["abbr"] = $transitions[0]["abbr"];
-				$transitions[] = $t2;
-			}
-			foreach($transitions as $transition)
-			{
-				$count++;
-				if($count == 1)
-				{
-					$lasttransition = $transition;
-					continue; // skip first item
-				}
-				if($transition["isdst"] == 1)
-				{
-					$tobj = new ZCiCalNode("DAYLIGHT", $tzobj);
-				}
-				else
-				{
-					$tobj = new ZCiCalNode("STANDARD", $tzobj);
-				}
-				//$tzobj->data[$tobj->getName()] == $tobj;
-
-				// convert timestamp to local time zone
-				$ts = ZDateHelper::toUnixDateTime(ZDateHelper::toLocalDateTime(ZDateHelper::toSQLDateTime($transition["ts"]),$tzid));
-				$datanode = new ZCiCalDataNode("DTSTART:".ZDateHelper::toICalDateTime($ts));
-				$tobj->data[$datanode->getName()] = $datanode;
-				//echo $ts . " => " . ZDateHelper::toICalDateTime($ts) . "<br/>\n"; exit;
-				$toffset = $lasttransition["offset"];
-				$thours = intval($toffset/60/60);
-				$tmins = abs($toffset)/60 - intval(abs($toffset)/60/60)*60;
-				if($thours < 0)
-				{
-					$offset = sprintf("%03d%02d",$thours,$tmins);
-				}
-				else
-				{
-					$offset = sprintf("+%02d%02d",$thours,$tmins);
-				}
-				$datanode = new ZCiCalDataNode("TZOFFSETFROM:".$offset);
-				$tobj->data[$datanode->getName()] = $datanode;
-
-				$toffset = $transition["offset"];
-				$thours = intval($toffset/60/60);
-				$tmins = abs($toffset)/60 - intval(abs($toffset)/60/60)*60;
-				if($thours < 0)
-				{
-					$offset = sprintf("%03d%02d",$thours,$tmins);
-				}
-				else
-				{
-					$offset = sprintf("+%02d%02d",$thours,$tmins);
-				}
-				$datanode = new ZCiCalDataNode("TZOFFSETTO:".$offset);
-				$tobj->data[$datanode->getName()] = $datanode;
-
-				$datanode = new ZCiCalDataNode("TZNAME:".$transition["abbr"]);
-				$tobj->data[$datanode->getName()] = $datanode;
-
-				$lasttransition = $transition;
-			}
-		}
-		return $tzobj;
-	}
-}

src/lib/zapcallib.php

@@ -1,28 +0,0 @@
-<?php
-/**
- * zapcallib.php
- *
- * @package	ZapCalLib
- * @author	Dan Cogliano <http://zcontent.net>
- * @copyright   Copyright (C) 2006 - 2017 by Dan Cogliano
- * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
- * @link	http://icalendar.org/php-library.html
- */
-
-/**
- * used by ZapCalLib
- * @var integer
- */
-define('_ZAPCAL',1);
-
-if(!defined('_ZAPCAL_BASE'))
-{
-	/**
-	 * the base folder of the library
-	 * @var string
-	 */
-	define('_ZAPCAL_BASE',__DIR__);
-}
-
-require_once(_ZAPCAL_BASE . '/includes/framework.php');
-