feat: define medium model, media repository (#396)

pkg/drive/model/medium.ts

@@ -0,0 +1,77 @@
+import type { AccountID } from '../../accounts/model/account.js';
+import type { ID } from '../../id/type.js';
+
+export type MediumID = string;
+
+export interface CreateMediumArgs {
+  id: ID<MediumID>;
+  name: string;
+  authorId: ID<AccountID>;
+  hash: string;
+  mime: string;
+  nsfw: boolean;
+  url: string;
+  thumbnailUrl: string;
+}
+
+export class Medium {
+  private constructor(arg: CreateMediumArgs) {
+    this.id = arg.id;
+    this.name = arg.name;
+    this.authorId = arg.authorId;
+    this.hash = arg.hash;
+    this.mime = arg.mime;
+    this.nsfw = arg.nsfw;
+    this.url = arg.url;
+    this.thumbnailUrl = arg.thumbnailUrl;
+  }
+
+  public static new(arg: CreateMediumArgs): Medium {
+    return new Medium(arg);
+  }
+
+  public static reconstruct(arg: CreateMediumArgs): Medium {
+    return new Medium(arg);
+  }
+
+  private readonly id: ID<MediumID>;
+
+  getId(): ID<MediumID> {
+    return this.id;
+  }
+  private readonly name: string;
+
+  getName(): string {
+    return this.name;
+  }
+  private readonly authorId: ID<AccountID>;
+
+  getAuthorId(): ID<AccountID> {
+    return this.authorId;
+  }
+  private readonly hash: string;
+
+  getHash(): string {
+    return this.hash;
+  }
+  private readonly mime: string;
+
+  getMime(): string {
+    return this.mime;
+  }
+  private readonly nsfw: boolean;
+
+  isNsfw(): boolean {
+    return this.nsfw;
+  }
+  private readonly url: string;
+
+  getUrl(): string {
+    return this.url;
+  }
+  private readonly thumbnailUrl: string;
+
+  getThumbnailUrl(): string {
+    return this.thumbnailUrl;
+  }
+}

pkg/drive/model/repository.ts

@@ -0,0 +1,12 @@
+import { Ether, type Option, type Result } from '@mikuroxina/mini-fn';
+
+import type { AccountID } from '../../accounts/model/account.js';
+import type { ID } from '../../id/type.js';
+import type { Medium, MediumID } from './medium.js';
+
+export interface MediaRepository {
+  create(medium: Medium): Promise<Result.Result<Error, void>>;
+  findById(id: ID<MediumID>): Promise<Option.Option<Medium>>;
+  findByAuthor(authorId: ID<AccountID>): Promise<Option.Option<Medium[]>>;
+}
+export const mediaRepoSymbol = Ether.newEtherSymbol<MediaRepository>();