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/*
Fosscord: A FOSS re-implementation and extension of the Discord.com backend.
Copyright (C) 2023 Fosscord and Fosscord Contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* eslint-disable @typescript-eslint/ban-ts-comment */
/* eslint-disable @typescript-eslint/no-explicit-any */
import { EntityMetadata, FindOptionsWhere } from "typeorm";
import { LocalCache } from "./LocalCache";
declare module "typeorm" {
interface BaseEntity {
metadata?: EntityMetadata;
cache: CacheManager;
}
}
export type BaseEntityWithId = { id: string; [name: string]: any };
export type Criteria =
| string
| string[]
| number
| number[]
| FindOptionsWhere<never>;
export interface Cache {
get(id: string): BaseEntityWithId | undefined;
set(id: string, entity: BaseEntityWithId): this;
find(options: Record<string, never>): BaseEntityWithId | undefined;
filter(options: Record<string, never>): BaseEntityWithId[];
delete(id: string): boolean;
}
export class CacheManager {
// last access time to automatically remove old entities from cache after 5 minutes of inactivity (to prevent memory leaks)
cache: Cache;
constructor() {
this.cache = new LocalCache();
// TODO: Config.get().cache.redis;
}
delete(id: string) {
return this.cache.delete(id);
}
insert(entity: BaseEntityWithId) {
if (!entity.id) return;
return this.cache.set(entity.id, entity);
}
find(options?: Record<string, never>, select?: string[] | undefined) {
if (!options) return null;
const entity = this.cache.find(options);
if (!entity) return null;
if (!select) return entity;
const result = {};
for (const prop of select) {
// @ts-ignore
result[prop] = entity[prop];
}
// @ts-ignore
return entity.constructor.create(result);
}
filter(options: Record<string, never>) {
return this.cache.filter(options);
}
}
|
