Added center filter to trainer endpoint

server/src/routes/trainer.ts

@@ -6,16 +6,38 @@ import { DatabaseError } from "pg";
 import Trainer from "../interfaces/trainer";
 import { AdminAuth } from "../middlewares/auth";
 import { trainerExists } from "../middlewares/trainer";
+import { idSchema } from "../schemas";
 
 const router: Router = express.Router();
 
+const trainerFiltersSchema = Joi.object({
+    center: Joi.array().single().items(
+        idSchema.required()
+    )
+});
+
+interface TrainerFilters {
+    center?: number[]
+}
+
 router.get("/trainer", async (req: Request, res: Response) => {
     try {
+        const validation = trainerFiltersSchema.validate(req.query, { abortEarly: false, stripUnknown: true });
+        if (validation.error !== undefined) {
+            return res.status(400).send(validation.error.details);
+        }
+
+        const trainerFilters: TrainerFilters = validation.value;
+
         const databaseResult = await client.query(`
         SELECT trainers.id, first_name, last_name, center_id, centers.name as center_name FROM trainers
         JOIN users ON trainers.user_id = users.id
-        JOIN centers on trainers.center_id = centers.id;
+        JOIN centers on trainers.center_id = centers.id
-        `);
+        WHERE trainers.id = ANY($1) OR $2;
+        `,[
+            trainerFilters.center !== undefined ? trainerFilters.center : [],
+            trainerFilters.center === undefined
+        ]);
 
         const trainers: Trainer[] = databaseResult.rows;