From 4513e828dac47a1818062c1cbd5d94d980a14ff3 Mon Sep 17 00:00:00 2001
From: Saumya Palakodety <palakodety.s@northeastern.edu>
Date: Tue, 4 Nov 2025 18:56:03 -0500
Subject: [PATCH] route for project users

---
 apps/backend/lambdas/projects/db.ts        | 18 +++++++++++++++++
 apps/backend/lambdas/projects/handler.ts   | 23 +++++++++++++++++++++-
 apps/backend/lambdas/projects/openapi.yaml | 13 ++++++++++++
 3 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 apps/backend/lambdas/projects/db.ts

diff --git a/apps/backend/lambdas/projects/db.ts b/apps/backend/lambdas/projects/db.ts
new file mode 100644
index 0000000..a34eac4
--- /dev/null
+++ b/apps/backend/lambdas/projects/db.ts
@@ -0,0 +1,18 @@
+import { Kysely, PostgresDialect } from 'kysely'
+import { Pool } from 'pg'
+import type { DB } from './db-types'  
+
+const db = new Kysely<DB>({
+  dialect: new PostgresDialect({
+    pool: new Pool({
+      host: process.env.DB_HOST ?? 'localhost',
+      port: Number(process.env.DB_PORT ?? 5432),
+      user: process.env.DB_USER ?? 'branch_dev',
+      password: process.env.DB_PASSWORD ?? 'password',
+      database: process.env.DB_NAME ?? 'branch_db',
+      ssl: false, 
+    }),
+  }),
+})
+
+export default db
\ No newline at end of file
diff --git a/apps/backend/lambdas/projects/handler.ts b/apps/backend/lambdas/projects/handler.ts
index 4ad00a1..36af8f2 100644
--- a/apps/backend/lambdas/projects/handler.ts
+++ b/apps/backend/lambdas/projects/handler.ts
@@ -1,4 +1,5 @@
 import { APIGatewayProxyEvent, APIGatewayProxyResult } from 'aws-lambda';
+import db from './db';
 
 export const handler = async (event: any): Promise<APIGatewayProxyResult> => {
   try {
@@ -16,7 +17,27 @@ export const handler = async (event: any): Promise<APIGatewayProxyResult> => {
 
     // >>> ROUTES-START (do not remove this marker)
     // CLI-generated routes will be inserted here
-    // <<< ROUTES-END
+    
+    // GET /projects/{id}/members
+    if (normalizedPath.startsWith('/projects/') && normalizedPath.split('/').length === 4 && method === 'GET') {
+      const id = normalizedPath.split('/')[2];
+      if (!id) return json(400, { message: 'id is required' });
+      const users = await db
+      .selectFrom('branch.project_memberships as pm')
+      .innerJoin('branch.users as u', 'u.user_id', 'pm.user_id')
+      .select([
+        'u.user_id',
+        'u.name',
+        'u.email',
+        'pm.role'
+      ])
+      .where('pm.project_id', '=', id)
+      .execute();
+      return json(200, { ok: true, route: 'GET /projects/{id}/members', pathParams: { id }, body: {
+        users
+    }});
+    }
+    // <<< ROUTES-END 
 
     return json(404, { message: 'Not Found', path: normalizedPath, method });
   } catch (err) {
diff --git a/apps/backend/lambdas/projects/openapi.yaml b/apps/backend/lambdas/projects/openapi.yaml
index cb44afd..e614e2e 100644
--- a/apps/backend/lambdas/projects/openapi.yaml
+++ b/apps/backend/lambdas/projects/openapi.yaml
@@ -18,3 +18,16 @@ paths:
                 properties:
                   ok:
                     type: boolean
+
+  /projects/{id}/members:
+    get:
+      summary: GET /projects/{id}/members
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: OK