1 files changed, 85 insertions, 0 deletions
diff --git a/src/util/cache/Cache.ts b/src/util/cache/Cache.ts
new file mode 100644
index 00000000..fb66c2e3
--- /dev/null
+++ b/src/util/cache/Cache.ts
@@ -0,0 +1,85 @@
+/*
+ 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);
+ }
+}
|
