🎉 init: 小龙的工作空间

.benchmark/course/fullstack/apps/api/src/services/user.ts

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+// Auto-generated User service
+import { queryAll, queryOne, execute } from "../db/client.js";
+import type { User, CreateUserInput, UpdateUserInput } from "../types/index.js";
+
+export class UserService {
+  /** List all users */
+  list(): User[] {
+    return queryAll<User>("SELECT * FROM users ORDER BY created_at DESC");
+  }
+
+  /** Get by ID */
+  getById(id: string): User | undefined {
+    return queryOne<User>("SELECT * FROM users WHERE id = ?", [id]);
+  }
+
+  /** Create */
+  create(input: CreateUserInput): User {
+    const id = crypto.randomUUID();
+    const now = new Date().toISOString();
+    const hasCreatedAt = true;
+    const hasUpdatedAt = true;
+    const cols = ["id", "phone", "nickname", "avatar_url", "created_at", "updated_at"];
+    const placeholders = cols.map(() => "?").join(", ");
+    const values = [id, input.phone ?? null, input.nickname ?? null, input.avatarUrl ?? null, now, now];
+
+    execute(`INSERT INTO users (${cols.join(", ")}) VALUES (${placeholders})`, values);
+    return this.getById(id)!;
+  }
+
+  /** Update */
+  update(id: string, input: UpdateUserInput): User | undefined {
+    const existing = this.getById(id);
+    if (!existing) return undefined;
+
+    const sets: string[] = [];
+    const values: unknown[] = [];
+    if (input.phone !== undefined) { sets.push("phone = ?"); values.push(input.phone); }
+    if (input.nickname !== undefined) { sets.push("nickname = ?"); values.push(input.nickname); }
+    if (input.avatarUrl !== undefined) { sets.push("avatar_url = ?"); values.push(input.avatarUrl); }
+
+    if (sets.length === 0) return existing;
+
+    sets.push("updated_at = ?");
+    values.push(new Date().toISOString());
+
+    values.push(id);
+    execute(`UPDATE users SET ${sets.join(", ")} WHERE id = ?`, values);
+    return this.getById(id)!;
+  }
+
+  /** Delete */
+  delete(id: string): boolean {
+    const result = execute("DELETE FROM users WHERE id = ?", [id]);
+    return result.changes > 0;
+  }
+}