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import MemoryStorage from "../infrastructures/MemoryStorage";
const REPOSITORY_KEY = "readyFrameRepository";
type State = { [tabId: number]: { [frameId: number]: number } };
export default interface ReadyFrameRepository {
addFrameId(tabId: number, frameId: number): Promise<void>;
removeFrameId(tabId: number, frameId: number): Promise<void>;
getFrameIds(tabId: number): Promise<number[] | undefined>;
}
export class ReadyFrameRepositoryImpl implements ReadyFrameRepository {
private cache: MemoryStorage;
constructor() {
this.cache = new MemoryStorage();
}
addFrameId(tabId: number, frameId: number): Promise<void> {
let state: State | undefined = this.cache.get(REPOSITORY_KEY);
if (typeof state === "undefined") {
state = {};
}
const tab = state[tabId] || {};
tab[frameId] = (tab[frameId] || 0) + 1;
state[tabId] = tab;
this.cache.set(REPOSITORY_KEY, state);
return Promise.resolve();
}
removeFrameId(tabId: number, frameId: number): Promise<void> {
const state: State | undefined = this.cache.get(REPOSITORY_KEY);
if (typeof state === "undefined") {
return Promise.resolve();
}
const ids = state[tabId];
if (typeof ids === "undefined") {
return Promise.resolve();
}
const tab = state[tabId] || {};
tab[frameId] = (tab[frameId] || 0) - 1;
if (tab[frameId] == 0) {
delete tab[frameId];
}
if (Object.keys(tab).length === 0) {
delete state[tabId];
}
this.cache.set(REPOSITORY_KEY, state);
return Promise.resolve();
}
getFrameIds(tabId: number): Promise<number[] | undefined> {
const state: State | undefined = this.cache.get(REPOSITORY_KEY);
if (typeof state === "undefined") {
return Promise.resolve(undefined);
}
const tab = state[tabId];
if (typeof tab === "undefined") {
return Promise.resolve(undefined);
}
const frameIds = Object.keys(tab)
.map((v) => Number(v))
.sort();
return Promise.resolve(frameIds);
}
}
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