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More work on refactoring the changes handling

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This commit is contained in:
Pieter Vander Vennet 2021-07-18 14:52:09 +02:00
parent 42391b4ff1
commit b55f9a25c6
19 changed files with 181 additions and 105 deletions
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27
Logic/UIEventSource.ts
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@ -6,7 +6,7 @@ export class UIEventSource<T> {
public data: T;
public trace: boolean;
private readonly tag: string;
private _callbacks = [];
private _callbacks: ((t: T) => (boolean | void | any)) [] = [];
constructor(data: T, tag: string = "") {
this.tag = tag;
@ -31,7 +31,7 @@ export class UIEventSource<T> {
}
return [];
}
public static flatten<X>(source: UIEventSource<UIEventSource<X>>, possibleSources: UIEventSource<any>[]): UIEventSource<X> {
const sink = new UIEventSource<X>(source.data?.data);
@ -63,7 +63,13 @@ export class UIEventSource<T> {
}
public addCallback(callback: ((latestData: T) => void)): UIEventSource<T> {
/**
* Adds a callback
*
* If the result of the callback is 'true', the callback is considered finished and will be removed again
* @param callback
*/
public addCallback(callback: ((latestData: T) => (boolean | void | any))): UIEventSource<T> {
if (callback === console.log) {
// This ^^^ actually works!
throw "Don't add console.log directly as a callback - you'll won't be able to find it afterwards. Wrap it in a lambda instead."
@ -90,8 +96,21 @@ export class UIEventSource<T> {
}
public ping(): void {
let toDelete = undefined
for (const callback of this._callbacks) {
callback(this.data);
if (callback(this.data) === true) {
// This callback wants to be deleted
if (toDelete === undefined) {
toDelete = [callback]
} else {
toDelete.push(callback)
}
}
}
if (toDelete !== undefined) {
for (const toDeleteElement of toDelete) {
this._callbacks.splice(this._callbacks.indexOf(toDeleteElement), 1)
}
}
}