Shareable abstract getOpenGraphTagValues

src/dal/entity/file.entity.ts

@@ -6,8 +6,9 @@ import {
   type Ref,
   Unique,
 } from '@mikro-orm/core';
-import { ShareableId } from './shareableId.entity';
+import { OpenGraphTagValues, ShareableId } from './shareableId.entity';
 import { User } from './user.entity';
+import { FastifyRequest } from 'fastify';
 
 @Entity()
 export class File extends ShareableId {
@@ -31,4 +32,18 @@ export class File extends ShareableId {
     nullable: true,
   })
   public createdBy?: Ref<User>;
+
+  public async getOpenGraphTagValues(
+    req: FastifyRequest,
+  ): Promise<OpenGraphTagValues> {
+    const createdBy = await this?.createdBy?.load();
+    return {
+      ogUrl: `${req.protocol}://${req.host}/file/${this.shareableId}`,
+      ogTitle: this?.fileName,
+      ogDescription: `From ${createdBy?.email}`,
+      ogImage: this.fileUrlService.getWatermarkedFileUrl(this.shareableId, req),
+      file: this,
+      createdBy,
+    } as OpenGraphTagValues;
+  }
 }

src/dal/entity/shareableId.entity.ts

@@ -1,5 +1,14 @@
 import { BeforeCreate, Property } from '@mikro-orm/core';
 import { randomUUID } from 'crypto';
+import type { FastifyRequest } from 'fastify';
+
+export interface OpenGraphTagValues {
+  ogUrl: string;
+  ogTitle: string;
+  ogDescription: string;
+  ogImage: string;
+  file?: any;
+}
 
 export abstract class ShareableId {
   @Property()
@@ -17,4 +26,8 @@ export abstract class ShareableId {
 
   @Property({ nullable: true })
   public banned?: boolean;
+
+  public abstract getOpenGraphTagValues(
+    req?: FastifyRequest,
+  ): Promise<OpenGraphTagValues>;
 }

src/dal/entity/user.entity.ts

@@ -11,8 +11,9 @@ import {
 } from '@mikro-orm/core';
 import { File } from './file.entity';
 import { PasswordReset } from './passwordReset.entity';
-import { ShareableId } from './shareableId.entity';
+import { OpenGraphTagValues, ShareableId } from './shareableId.entity';
 import { UserDevice } from './userDevice.entity';
+import { FastifyRequest } from 'fastify';
 
 @Entity()
 export class User extends ShareableId {
@@ -46,4 +47,10 @@ export class User extends ShareableId {
 
   @OneToMany(() => File, (file) => file.createdBy)
   public fileUploads = new Collection<File>(this);
+
+  public getOpenGraphTagValues(
+    req?: FastifyRequest,
+  ): Promise<OpenGraphTagValues> {
+    throw Error(`Not implemented ${JSON.stringify(req)}`);
+  }
 }

src/open-graph/open-graph.service.ts

@@ -4,13 +4,7 @@ import { FileUrlService } from '../file/file-url/file-url.service';
 import { InjectRepository } from '@mikro-orm/nestjs';
 import { File } from '../dal/entity/file.entity';
 import { EntityManager, EntityRepository } from '@mikro-orm/core';
-
-export interface OpenGraphTagValues {
-  ogUrl: string;
-  ogTitle: string;
-  ogDescription: string;
-  ogImage: string;
-}
+import { OpenGraphTagValues } from '../dal/entity/shareableId.entity';
 
 @Injectable()
 export class OpenGraphService {
@@ -25,23 +19,15 @@ export class OpenGraphService {
     shareableId: string,
     type: string,
     req: FastifyRequest,
-  ) {
+  ): Promise<OpenGraphTagValues> {
     if (type == 'file') {
       const file = await this.fileRepository.findOne(
         { shareableId },
         {
           populate: ['createdBy'],
         },
       );
-      const createdBy = await file?.createdBy?.load();
-      return {
-        ogUrl: `${req.protocol}://${req.host}/file/${shareableId}`,
-        ogTitle: file?.fileName,
-        ogDescription: `From ${createdBy?.email}`,
-        ogImage: this.fileUrlService.getWatermarkedFileUrl(shareableId, req),
-        file,
-        createdBy,
-      };
+      return file.getOpenGraphTagValues(req);
     }
   }
 }