Embeds: factor out from postMessage

src/util/config/types/subconfigurations/limits/MessageLimits.ts

@@ -24,4 +24,5 @@ export class MessageLimits {
     maxBulkDelete: number = 1000;
     maxEmbedDownloadSize: number = 1024 * 1024 * 5;
     maxPreloadCount: number = 100;
+    maxEmbeds: number = 20;
 }

src/util/entities/EmbedCache.ts

@@ -29,4 +29,11 @@ export class EmbedCache extends BaseClass {
 
     @Column({ type: "simple-json" })
     embed: Embed;
+
+    // TODO: store all returned embed objects from a handler
+    // @Column({ type: "simple-json" })
+    // embeds: Embed[];
+
+    @Column({ name: "created_at", type: "timestamp with time zone" })
+    createdAt: Date;
 }

src/util/migration/postgres/1772404321402-EmbedCacheCreatedAt.ts

@@ -0,0 +1,13 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class EmbedCacheCreatedAt1772404321402 implements MigrationInterface {
+    name = "EmbedCacheCreatedAt1772404321402";
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "embed_cache" ADD "created_at" timestamp with time zone DEFAULT now();`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "embed_cache" DROP COLUMN "created_at"`);
+    }
+}

src/util/util/extensions/Array.ts

@@ -42,3 +42,16 @@ export function arrayDistinctBy<T, M>(array: T[], selector: (elem: T) => M): T[]
         return true;
     });
 }
+
+export function arrayGroupBy<T, M>(array: T[], selector: (elem: T) => M): Map<M, T[]> {
+    const map = new Map<M, T[]>();
+
+    array.forEach((item) => {
+        const mappedValue = selector(item);
+        const existing = map.get(mappedValue);
+        if (existing) existing.push(item);
+        else map.set(mappedValue, [item]);
+    });
+
+    return map;
+}