refactor: pretty much the whole backend module hierarchy

backend/src/user-data/play-state/play-state.entity.ts

@@ -0,0 +1,80 @@
+import { ApiProperty } from '@nestjs/swagger';
+import {
+  Column,
+  Entity,
+  JoinColumn,
+  ManyToOne,
+  PrimaryColumn,
+  PrimaryGeneratedColumn,
+  Unique,
+  UpdateDateColumn,
+} from 'typeorm';
+import { LibraryItem } from '../library/library.entity';
+import { MediaType } from 'src/common/common.dto';
+import { User } from 'src/users/user.entity';
+
+@Entity()
+@Unique(['tmdbId', 'userId', 'season', 'episode'])
+export class PlayState {
+  @ApiProperty({ type: 'string' })
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @ApiProperty({ required: true, type: 'number' })
+  @Column()
+  tmdbId: string;
+
+  @ApiProperty({ enum: MediaType })
+  @Column()
+  mediaType: MediaType;
+
+  @ApiProperty({ required: true, type: 'string' })
+  @Column()
+  userId: string;
+
+  // @ApiProperty({ required: false, type: UserDto })
+  @ManyToOne(() => User, (user) => user.playStates, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'userId' })
+  user?: User;
+
+  @ApiProperty({ required: false, type: 'number' })
+  @PrimaryColumn({ default: 0 })
+  season: number = 0;
+
+  @ApiProperty({ required: false, type: 'number' })
+  @PrimaryColumn({ default: 0 })
+  episode: number = 0;
+
+  @ApiProperty({
+    type: 'boolean',
+    default: false,
+    description: 'Whether the user has watched this media',
+  })
+  @Column({ default: false })
+  watched: boolean = false;
+
+  @ApiProperty({
+    default: false,
+    example: 0.5,
+    description: 'A number between 0 and 1',
+  })
+  @Column('double', { default: 0 })
+  progress: number = 0;
+
+  @ApiProperty({
+    type: 'string',
+    description: 'Last time the user played this media',
+  })
+  @UpdateDateColumn()
+  lastPlayedAt: Date;
+
+  @ManyToOne(() => LibraryItem, (libraryItem) => libraryItem.playStates, {
+    nullable: true,
+    createForeignKeyConstraints: false,
+  })
+  @JoinColumn([
+    { name: 'tmdbId', referencedColumnName: 'tmdbId' },
+    { name: 'userId', referencedColumnName: 'userId' },
+  ])
+  libraryItem?: LibraryItem;
+}