98 lines
3.7 KiB
TypeScript
98 lines
3.7 KiB
TypeScript
import * as fs from 'fs';
|
|
|
|
type CacheEntry = { data: string, lastUpdateMs: number }
|
|
|
|
export class MangaUpdatesCache {
|
|
private readonly FILE_CACHE_DIR = 'cache';
|
|
private readonly FILE_SEARCH_BY_TITLE = this.FILE_CACHE_DIR + '/searchByTitle.json';
|
|
private readonly FILE_SERIES_BY_ID = this.FILE_CACHE_DIR + '/seriesById.json';
|
|
private readonly FILE_SERIES_GROUPS_BY_ID = this.FILE_CACHE_DIR + '/seriesGroupsById.json';
|
|
|
|
private readonly MAX_CACHE_AGE_SEARCH_BY_TITLE = 7 * 24 * 60 * 60 * 1000;
|
|
private readonly MAX_CACHE_AGE_SERIES_BY_ID = 30 * 24 * 60 * 60 * 1000;
|
|
private readonly MAX_CACHE_AGE_SERIES_GROUPS_BY_ID = 1 * 24 * 60 * 60 * 1000;
|
|
|
|
private _searchByTitle = new Map<string, CacheEntry>();
|
|
private _seriesById = new Map<string, CacheEntry>();
|
|
private _seriesGroupsById = new Map<string, CacheEntry>();
|
|
|
|
constructor() {
|
|
this.load();
|
|
}
|
|
|
|
private load(): void {
|
|
try {
|
|
fs.mkdirSync(this.FILE_CACHE_DIR);
|
|
} catch (_) {
|
|
}
|
|
this._searchByTitle = this.loadJson(this.FILE_SEARCH_BY_TITLE);
|
|
this._seriesById = this.loadJson(this.FILE_SERIES_BY_ID);
|
|
this._seriesGroupsById = this.loadJson(this.FILE_SERIES_GROUPS_BY_ID);
|
|
}
|
|
|
|
private loadJson(file: string): Map<string, CacheEntry> {
|
|
try {
|
|
const data = fs.readFileSync(file, {encoding: 'utf8', flag: 'r'});
|
|
const json = JSON.parse(data);
|
|
return new Map<string, CacheEntry>(Object.entries(json));
|
|
} catch (err) {
|
|
console.error('Failed to load cache from ' + file + ':' + (err as Error).message);
|
|
return new Map();
|
|
}
|
|
}
|
|
|
|
private saveJson(file: string, map: Map<string, CacheEntry>): void {
|
|
try {
|
|
const data = JSON.stringify(Object.fromEntries(map.entries()));
|
|
fs.writeFileSync(file, data, {encoding: 'utf8', flag: 'w'});
|
|
} catch (err) {
|
|
console.error(err);
|
|
}
|
|
}
|
|
|
|
getSearchByTitle(title: string): string | undefined {
|
|
const entry = this._searchByTitle.get(title);
|
|
return !entry || entry.lastUpdateMs + this.MAX_CACHE_AGE_SEARCH_BY_TITLE < Date.now() ? undefined : entry.data;
|
|
}
|
|
|
|
getSeriesById(id: string): string | undefined {
|
|
const entry = this._seriesById.get(id);
|
|
return !entry || entry.lastUpdateMs + this.MAX_CACHE_AGE_SERIES_BY_ID < Date.now() ? undefined : entry.data;
|
|
}
|
|
|
|
getSeriesGroupsById(id: string): string | undefined {
|
|
const entry = this._seriesGroupsById.get(id);
|
|
return !entry || entry.lastUpdateMs + this.MAX_CACHE_AGE_SERIES_GROUPS_BY_ID < Date.now() ? undefined : entry.data;
|
|
}
|
|
|
|
putSearchByTitle(title: string, value: string): void {
|
|
this._searchByTitle.set(title, {data: value, lastUpdateMs: Date.now()});
|
|
this.saveJson(this.FILE_SEARCH_BY_TITLE, this._searchByTitle);
|
|
}
|
|
|
|
putSeriesById(id: string, value: string): void {
|
|
this._seriesById.set(id, {data: value, lastUpdateMs: Date.now()});
|
|
this.saveJson(this.FILE_SERIES_BY_ID, this._seriesById);
|
|
}
|
|
|
|
putSeriesGroupsById(id: string, value: string): void {
|
|
this._seriesGroupsById.set(id, {data: value, lastUpdateMs: Date.now()});
|
|
this.saveJson(this.FILE_SERIES_GROUPS_BY_ID, this._seriesGroupsById);
|
|
}
|
|
|
|
getOutOfDateSearch(): string[] {
|
|
return Array.from(this._searchByTitle.entries())
|
|
.filter(([title, entry]) => entry.lastUpdateMs + this.MAX_CACHE_AGE_SEARCH_BY_TITLE < Date.now())
|
|
.map(([title, entry]) => title);
|
|
}
|
|
getOutOfDateSeries(): string[] {
|
|
return Array.from(this._seriesById.entries())
|
|
.filter(([title, entry]) => entry.lastUpdateMs + this.MAX_CACHE_AGE_SERIES_BY_ID < Date.now())
|
|
.map(([title, entry]) => title);
|
|
}
|
|
getOutOfDateSeriesGroups(): string[] {
|
|
return Array.from(this._seriesGroupsById.entries())
|
|
.filter(([title, entry]) => entry.lastUpdateMs + this.MAX_CACHE_AGE_SERIES_GROUPS_BY_ID < Date.now())
|
|
.map(([title, entry]) => title);
|
|
}
|
|
} |