retrozinndev
90 lines
2.0 KiB
TypeScript
90 lines
2.0 KiB
TypeScript
import { Subscribable } from "astal/binding";
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export class VarMap<K, V> implements Subscribable {
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#subs = new Set<(v: Map<K, V>) => void>();
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#map: Map<K, V>;
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constructor(initial?: Map<K, V>) {
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this.#map = initial || new Map<K, V>();
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}
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private notifyMap() {
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const subs = this.#subs;
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for(const sub of subs) {
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sub(this.#map);
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}
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}
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public get(): Map<K, V> {
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return this.#map;
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}
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public get size(): number {
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return this.#map.size;
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}
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public getValue(key: K): (V|undefined) {
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return this.#map.get(key);
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}
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public getKeyAt(index: number): (K|undefined) {
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return [...this.#map.keys()][index];
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}
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public getValueAt(index: number): (V|undefined) {
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return [...this.#map.values()][index];
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}
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public set(key: K, value: V): Map<K, V> {
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const newMap: Map<K, V> = this.#map.set(key, value);
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this.notifyMap();
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return newMap;
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}
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public delete(key: K): boolean {
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const deleted: boolean = this.#map.delete(key);
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this.notifyMap();
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return deleted;
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}
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public has(key: K): boolean {
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return this.#map.has(key);
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}
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public clear(): void {
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this.#map.clear();
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this.notifyMap();
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}
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public entries(): MapIterator<[K, V]> {
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return this.#map.entries();
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}
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public keys(): MapIterator<K> {
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return this.#map.keys();
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}
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public values(): MapIterator<V> {
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return this.#map.values();
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}
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public forEach<ReturnType = any> (callback: (value: V, key: K, map: Map<K, V>) => ReturnType): ReturnType[] {
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const result: Array<ReturnType> = [];
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for(const entry of this.#map.entries()) {
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result.push(callback(entry[1], entry[0], this.#map));
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}
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return result;
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}
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public subscribe(callback: (v: Map<K, V>) => void): () => void {
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this.#subs.add(callback);
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return () => {
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this.#subs.delete(callback);
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}
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}
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}
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