feat(backend): user from address (#99)

backend/src/routes/getUser.ts

@@ -0,0 +1,43 @@
+import { eq } from 'drizzle-orm/pg-core/expressions'
+import type { FastifyInstance } from 'fastify'
+
+import { registration } from '@/db/schema'
+
+import { addressRegex } from '.'
+
+export function getUserRoute(fastify: FastifyInstance) {
+  fastify.get(
+    '/get_user',
+
+    async (request, reply) => {
+      const { address } = request.query as { address?: string }
+
+      if (!address) {
+        return reply.status(400).send({ message: 'Address is required' })
+      }
+
+      // Validate address format
+      if (!addressRegex.test(address)) {
+        return reply.status(400).send({ message: 'Invalid address format' })
+      }
+
+      try {
+        const user = await fastify.db
+          .select({ user: registration.nickname })
+          .from(registration)
+          .where(eq(registration.contract_address, address))
+          .limit(1)
+          .execute()
+
+        if (!user.length) {
+          return reply.status(404).send({ message: 'User not found.' })
+        }
+
+        return reply.send(user[0])
+      } catch (error) {
+        console.error(error)
+        return reply.status(500).send({ message: 'Internal server error' })
+      }
+    },
+  )
+}

backend/src/routes/index.ts

@@ -12,6 +12,7 @@ import { getCurrentExpenseRoute } from './getCurrentExpense'
 import { getLimitRoute } from './getLimit'
 import { getOtp } from './getOtp'
 import { getTransactionHistory } from './getTransactionHistory'
+import { getUserRoute } from './getUser'
 import { verifyOtp } from './verifyOtp'
 
 export const addressRegex = /^0x0[0-9a-fA-F]{63}$/
@@ -26,6 +27,7 @@ export function declareRoutes(fastify: FastifyInstance, deployer: Account, twili
   getClaimRoute(fastify)
   getLimitRoute(fastify)
   getExecuteFromOutsideRoute(fastify, deployer)
+  getUserRoute(fastify)
 }
 
 function getStatusRoute(fastify: FastifyInstance) {

backend/test/getUser.test.ts

@@ -0,0 +1,83 @@
+import { PostgreSqlContainer, type StartedPostgreSqlContainer } from '@testcontainers/postgresql'
+import type { FastifyInstance } from 'fastify'
+import { afterAll, beforeAll, describe, expect, test } from 'vitest'
+
+import { buildApp } from '@/app'
+
+import * as schema from '../src/db/schema'
+
+describe('GET /get_user route', () => {
+  let container: StartedPostgreSqlContainer
+  let app: FastifyInstance
+  const testAddress = '0x064a24243f2aabae8d2148fa878276e6e6e452e3941b417f3c33b1649ea83e11'
+  const unknownAddress = '0x064a24243f2aabae8d2148fa878276e6e6e452e3941b417f3c33b1649ea83e12'
+  const testName = 'Jean Dupont'
+
+  beforeAll(async () => {
+    container = await new PostgreSqlContainer().start()
+    const connectionUri = container.getConnectionUri()
+    app = await buildApp({
+      database: {
+        connectionString: connectionUri,
+      },
+      app: {
+        port: 8080,
+      },
+    })
+
+    await app.ready()
+    await app.db.insert(schema.registration).values([
+      {
+        phone_number: '+33611223344',
+        contract_address: testAddress,
+        nickname: testName,
+      },
+    ])
+  })
+
+  afterAll(async () => {
+    await app.close()
+    await container.stop()
+  })
+
+  test('should return the name for a valid registered address', async () => {
+    const response = await app.inject({
+      method: 'GET',
+      url: `/get_user?address=${testAddress}`,
+    })
+
+    expect(response.statusCode).toBe(200)
+    expect(response.json()).toHaveProperty('user', testName)
+  })
+
+  test('should return an error for an unknown address', async () => {
+    const response = await app.inject({
+      method: 'GET',
+      url: `/get_user?address=${unknownAddress}`,
+    })
+
+    expect(response.statusCode).toBe(404)
+    expect(response.json()).toHaveProperty('message', 'User not found.')
+  })
+
+  test('should return error, invalid address format', async () => {
+    const invalidAddress = '0x0'
+    const response = await app.inject({
+      method: 'GET',
+      url: `/get_user?address=${invalidAddress}`,
+    })
+
+    expect(response.statusCode).toBe(400)
+    expect(response.json()).toHaveProperty('message', 'Invalid address format')
+  })
+
+  test('should return error, no address provided', async () => {
+    const response = await app.inject({
+      method: 'GET',
+      url: '/get_user',
+    })
+
+    expect(response.statusCode).toBe(400)
+    expect(response.json()).toHaveProperty('message', 'Address is required')
+  })
+})