From 38d745e61998ea5c6fde403e6b967fa091b5b693 Mon Sep 17 00:00:00 2001
From: AdrianSantamarina <uo279062@uniovi.es>
Date: Tue, 12 Mar 2024 00:51:55 +0100
Subject: [PATCH] =?UTF-8?q?Adici=C3=B3n=20comprobaci=C3=B3n=20nombre=20de?=
 =?UTF-8?q?=20usuario=20ya=20existe=20en=20register?=
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---
 users/userservice/user-service.js | 13 +++++++++++++
 webapp/src/components/AddUser.js  |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/users/userservice/user-service.js b/users/userservice/user-service.js
index 9fe91127..7921cb28 100644
--- a/users/userservice/user-service.js
+++ b/users/userservice/user-service.js
@@ -45,6 +45,19 @@ app.post('/adduser', async (req, res) => {
         res.status(400).json({ error: error.message }); 
     }});
 
+app.get('/checkuser/:username', async (req, res) => {
+    try{
+      const existUser = await User.findOne({ username: req.params.username });
+      if(existUser){
+        return res.json({ exists: true });
+      }else{
+        return res.json({ exists: false });
+      }
+    } catch (error) {
+        res.status(400).json({ error: error.message }); 
+    }
+});
+
 const server = app.listen(port, () => {
   console.log(`User Service listening at http://localhost:${port}`);
 });
diff --git a/webapp/src/components/AddUser.js b/webapp/src/components/AddUser.js
index 2869d2f1..88d5ab7d 100644
--- a/webapp/src/components/AddUser.js
+++ b/webapp/src/components/AddUser.js
@@ -22,6 +22,13 @@ const AddUser = () => {
         setError("Passwords don't match");
         return;
       }
+
+      const response = await axios.get(`${apiEndpoint}/checkuser/${username}`);
+      if (response.data.exists) {
+        setError("Username already exists");
+        return;
+      }
+
       await axios.post(`${apiEndpoint}/adduser`, { username, password });
       setOpenSnackbar(true);
     } catch (error) {