feat: add check validity to the user signup

apps/edr-freight-api/src/modules/auth/check-availability.controller.ts

@@ -0,0 +1,22 @@
+import { Controller, Get, Query } from "@nestjs/common";
+import { ApiOperation, ApiTags } from "@nestjs/swagger";
+import { Public } from "@edr/api-common";
+
+import { CheckAvailabilityService } from "./check-availability.service";
+
+@ApiTags("auth")
+@Controller("auth")
+@Public()
+export class CheckAvailabilityController {
+  constructor(
+    private readonly checkAvailabilityService: CheckAvailabilityService,
+  ) {}
+
+  @Get("check-availability")
+  @ApiOperation({
+    summary: "Check whether an email and/or phone number is already registered",
+  })
+  check(@Query("email") email?: string, @Query("phone") phone?: string) {
+    return this.checkAvailabilityService.check({ email, phone });
+  }
+}

apps/edr-freight-api/src/modules/auth/check-availability.service.ts

@@ -0,0 +1,47 @@
+import { BadRequestException, Injectable } from "@nestjs/common";
+import { InjectRepository } from "@nestjs/typeorm";
+import { Repository } from "typeorm";
+
+import { User } from "@tria-plc/iamapi-common/entities/iam/user/user.entity";
+
+export interface CheckAvailabilityQuery {
+  email?: string;
+  phone?: string;
+}
+
+export interface CheckAvailabilityResult {
+  emailTaken: boolean;
+  phoneTaken: boolean;
+}
+
+@Injectable()
+export class CheckAvailabilityService {
+  constructor(
+    @InjectRepository(User)
+    private readonly userRepository: Repository<User>,
+  ) {}
+
+  async check({
+    email,
+    phone,
+  }: CheckAvailabilityQuery): Promise<CheckAvailabilityResult> {
+    if (!email && !phone) {
+      throw new BadRequestException("email or phone is required");
+    }
+
+    const matches = await this.userRepository.find({
+      where: [
+        ...(email ? [{ email }] : []),
+        ...(phone ? [{ phoneNumber: phone }] : []),
+      ],
+      select: { id: true, email: true, phoneNumber: true },
+    });
+
+    return {
+      emailTaken: email ? matches.some((user) => user.email === email) : false,
+      phoneTaken: phone
+        ? matches.some((user) => user.phoneNumber === phone)
+        : false,
+    };
+  }
+}

apps/edr-freight-api/src/modules/auth/freight-auth.module.ts

@@ -1,10 +1,16 @@
 import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
 
+import { User } from '@tria-plc/iamapi-common/entities/iam/user/user.entity';
+
+import { CheckAvailabilityController } from './check-availability.controller';
+import { CheckAvailabilityService } from './check-availability.service';
 import { FreightMeController } from './freight-me.controller';
 import { FreightMeService } from './freight-me.service';
 
 @Module({
-  controllers: [FreightMeController],
-  providers: [FreightMeService],
+  imports: [TypeOrmModule.forFeature([User])],
+  controllers: [FreightMeController, CheckAvailabilityController],
+  providers: [FreightMeService, CheckAvailabilityService],
 })
 export class FreightAuthModule {}