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Adding support to persist variables in Redis

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This commit is contained in:
David Négrier 2021-07-19 15:57:50 +02:00
parent 18e4d2ba4e
commit d955ddfe82
24 changed files with 397 additions and 120 deletions
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94
back/src/Services/VariablesManager.ts
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@ -1,14 +1,16 @@
/**
* Handles variables shared between the scripting API and the server.
*/
import {ITiledMap, ITiledMapObject, ITiledMapObjectLayer} from "@workadventure/tiled-map-type-guard/dist";
import {User} from "_Model/User";
import { ITiledMap, ITiledMapObject, ITiledMapObjectLayer } from "@workadventure/tiled-map-type-guard/dist";
import { User } from "_Model/User";
import { variablesRepository } from "./Repository/VariablesRepository";
import { redisClient } from "./RedisClient";
interface Variable {
defaultValue?: string,
persist?: boolean,
readableBy?: string,
writableBy?: string,
defaultValue?: string;
persist?: boolean;
readableBy?: string;
writableBy?: string;
}
export class VariablesManager {
@ -25,7 +27,7 @@ export class VariablesManager {
/**
* @param map The map can be "null" if it is hosted on a private network. In this case, we assume this is a test setup and bypass any server-side checks.
*/
constructor(private map: ITiledMap | null) {
constructor(private roomUrl: string, private map: ITiledMap | null) {
// We initialize the list of variable object at room start. The objects cannot be edited later
// (otherwise, this would cause a security issue if the scripting API can edit this list of objects)
if (map) {
@ -40,14 +42,43 @@ export class VariablesManager {
}
}
/**
* Let's load data from the Redis backend.
*/
public async init(): Promise<void> {
if (!this.shouldPersist()) {
return;
}
const variables = await variablesRepository.loadVariables(this.roomUrl);
console.error("LIST OF VARIABLES FETCHED", variables);
for (const key in variables) {
this._variables.set(key, variables[key]);
}
}
/**
* Returns true if saving should be enabled, and false otherwise.
*
* Saving is enabled if REDIS_HOST is set
* unless we are editing a local map
* unless we are in dev mode in which case it is ok to save
*
* @private
*/
private shouldPersist(): boolean {
return redisClient !== null && (this.map !== null || process.env.NODE_ENV === "development");
}
private static findVariablesInMap(map: ITiledMap): Map<string, Variable> {
const objects = new Map<string, Variable>();
for (const layer of map.layers) {
if (layer.type === 'objectgroup') {
if (layer.type === "objectgroup") {
for (const object of (layer as ITiledMapObjectLayer).objects) {
if (object.type === 'variable') {
if (object.type === "variable") {
if (object.template) {
console.warn('Warning, a variable object is using a Tiled "template". WorkAdventure does not support objects generated from Tiled templates.')
console.warn(
'Warning, a variable object is using a Tiled "template". WorkAdventure does not support objects generated from Tiled templates.'
);
continue;
}
@ -67,26 +98,30 @@ export class VariablesManager {
for (const property of object.properties) {
const value = property.value;
switch (property.name) {
case 'default':
case "default":
variable.defaultValue = JSON.stringify(value);
break;
case 'persist':
if (typeof value !== 'boolean') {
case "persist":
if (typeof value !== "boolean") {
throw new Error('The persist property of variable "' + object.name + '" must be a boolean');
}
variable.persist = value;
break;
case 'writableBy':
if (typeof value !== 'string') {
throw new Error('The writableBy property of variable "' + object.name + '" must be a string');
case "writableBy":
if (typeof value !== "string") {
throw new Error(
'The writableBy property of variable "' + object.name + '" must be a string'
);
}
if (value) {
variable.writableBy = value;
}
break;
case 'readableBy':
if (typeof value !== 'string') {
throw new Error('The readableBy property of variable "' + object.name + '" must be a string');
case "readableBy":
if (typeof value !== "string") {
throw new Error(
'The readableBy property of variable "' + object.name + '" must be a string'
);
}
if (value) {
variable.readableBy = value;
@ -107,14 +142,27 @@ export class VariablesManager {
throw new Error('Trying to set a variable "' + name + '" that is not defined as an object in the map.');
}
if (variableObject.writableBy && user.tags.indexOf(variableObject.writableBy) === -1) {
throw new Error('Trying to set a variable "' + name + '". User "' + user.name + '" does not have sufficient permission. Required tag: "' + variableObject.writableBy + '". User tags: ' + user.tags.join(', ') + ".");
if (variableObject.writableBy && !user.tags.includes(variableObject.writableBy)) {
throw new Error(
'Trying to set a variable "' +
name +
'". User "' +
user.name +
'" does not have sufficient permission. Required tag: "' +
variableObject.writableBy +
'". User tags: ' +
user.tags.join(", ") +
"."
);
}
readableBy = variableObject.readableBy;
}
this._variables.set(name, value);
variablesRepository
.saveVariable(this.roomUrl, name, value)
.catch((e) => console.error("Error while saving variable in Redis:", e));
return readableBy;
}
@ -128,9 +176,9 @@ export class VariablesManager {
for (const [key, value] of this._variables.entries()) {
const variableObject = this.variableObjects.get(key);
if (variableObject === undefined) {
throw new Error('Unexpected variable "'+key+'" found has no associated variableObject.');
throw new Error('Unexpected variable "' + key + '" found has no associated variableObject.');
}
if (!variableObject.readableBy || tags.indexOf(variableObject.readableBy) !== -1) {
if (!variableObject.readableBy || tags.includes(variableObject.readableBy)) {
readableVariables.set(key, value);
}
}