feat(backend): forgot password (#250)

* feat(backend): forgot password

* feat: apply feedback from code review

* chore(auth): validate the minimum length of 'newPassword'

* chore(auth): make token has an expiry of 1 hour

* chore: rename all occurrences of 'code' to 'token'

* chore(backend): provide value on nanoIdGen method

apps/server/src/database/repos/user-tokens/user-tokens.repo.ts

@@ -0,0 +1,89 @@
+import {
+  InsertableUserToken,
+  UpdatableUserToken,
+} from '@docmost/db/types/entity.types';
+import { KyselyDB, KyselyTransaction } from '@docmost/db/types/kysely.types';
+import { dbOrTx } from '@docmost/db/utils';
+import { Injectable } from '@nestjs/common';
+import { InjectKysely } from 'nestjs-kysely';
+
+@Injectable()
+export class UserTokensRepo {
+  constructor(@InjectKysely() private readonly db: KyselyDB) {}
+
+  async insertUserToken(
+    insertableUserToken: InsertableUserToken,
+    trx?: KyselyTransaction,
+  ) {
+    const db = dbOrTx(this.db, trx);
+    return db
+      .insertInto('userTokens')
+      .values(insertableUserToken)
+      .returningAll()
+      .executeTakeFirst();
+  }
+
+  async findByUserId(
+    userId: string,
+    workspaceId: string,
+    tokenType: string,
+    trx?: KyselyTransaction,
+  ) {
+    const db = dbOrTx(this.db, trx);
+    return db
+      .selectFrom('userTokens')
+      .select([
+        'id',
+        'token',
+        'user_id',
+        'workspace_id',
+        'type',
+        'expires_at',
+        'used_at',
+        'created_at',
+      ])
+      .where('user_id', '=', userId)
+      .where('workspace_id', '=', workspaceId)
+      .where('type', '=', tokenType)
+      .orderBy('expires_at desc')
+      .execute();
+  }
+
+  async updateUserToken(
+    updatableUserToken: UpdatableUserToken,
+    userTokenId: string,
+    trx?: KyselyTransaction,
+  ) {
+    const db = dbOrTx(this.db, trx);
+    return db
+      .updateTable('userTokens')
+      .set({ ...updatableUserToken })
+      .where('id', '=', userTokenId)
+      .execute();
+  }
+
+  async deleteUserToken(
+    userId: string,
+    workspaceId: string,
+    tokenType: string,
+    trx?: KyselyTransaction,
+  ) {
+    const db = dbOrTx(this.db, trx);
+    return db
+      .deleteFrom('userTokens')
+      .where('user_id', '=', userId)
+      .where('workspace_id', '=', workspaceId)
+      .where('type', '=', tokenType)
+      .execute();
+  }
+
+  async deleteExpiredUserTokens(
+    trx?: KyselyTransaction,
+  ) {
+    const db = dbOrTx(this.db, trx);
+    return db
+      .deleteFrom('userTokens')
+      .where('expires_at', '<', new Date())
+      .execute(); 
+  }
+}