Add MediaUpload entity & Media module

Signed-off-by: David Mehren <git@herrmehren.de>

src/media/media-upload.entity.ts

@@ -0,0 +1,65 @@
+import * as crypto from 'crypto';
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  ManyToOne,
+  PrimaryColumn,
+} from 'typeorm';
+import { Note } from '../notes/note.entity';
+import { User } from '../users/user.entity';
+
+@Entity()
+export class MediaUpload {
+  @PrimaryColumn()
+  id: string;
+
+  @ManyToOne(_ => Note, { nullable: false })
+  note: Note;
+
+  @ManyToOne(_ => User, { nullable: false })
+  user: User;
+
+  @Column({
+    nullable: false,
+  })
+  extension: string;
+
+  @Column({
+    nullable: false,
+  })
+  backendType: string;
+
+  @Column({
+    nullable: true,
+  })
+  backendData: string | null;
+
+  @CreateDateColumn()
+  createdAt: Date;
+
+  // eslint-disable-next-line @typescript-eslint/no-empty-function
+  private constructor() {}
+
+  public static create(
+    note: Note,
+    user: User,
+    extension: string,
+    backendType: string,
+    backendData?: string,
+  ): MediaUpload {
+    const upload = new MediaUpload();
+    const randomBytes = crypto.randomBytes(16);
+    upload.id = randomBytes.toString('hex');
+    upload.note = note;
+    upload.user = user;
+    upload.extension = extension;
+    upload.backendType = backendType;
+    if (backendData) {
+      upload.backendData = backendData;
+    } else {
+      upload.backendData = null;
+    }
+    return upload;
+  }
+}