Fix History Service Database Connection Issue

- As mySQL Database Container takes time to initially load

HistoryService/Controllers/HistoryDatabaseController.js

@@ -8,18 +8,41 @@ const TABLE_NAME = config.tableName;
 var pool = null;
 
 async function connectToDatabase() {
-  // Waiting for SQL Container to be up
-  await new Promise((r) => setTimeout(r, 10000));
-
-  pool = mySql
-    .createPool({
-      host: config.databaseUrl,
-      port: config.databasePort,
-      user: "root",
-      password: "",
-      //   database: DATABASE_NAME,
-    })
-    .promise();
+  let connected = false;
+  const maxRetries = 10;
+  const retryInterval = 3000; // 3 seconds
+
+  for (let attempt = 1; attempt <= maxRetries; attempt++) {
+    try {
+      pool = mySql
+        .createPool({
+          host: config.databaseUrl,
+          port: config.databasePort,
+          user: "root",
+          password: "",
+        })
+        .promise();
+
+      console.log(`Attempting to connect to database (Attempt ${attempt})...`);
+      await pool.query(`USE ${DATABASE_NAME};`); // Simple query to test connection
+      console.log("Connected to database.");
+      connected = true;
+      break;
+    } catch (error) {
+      console.error(
+        `Database connection failed (Attempt ${attempt}):`,
+        error.message
+      );
+      if (attempt < maxRetries) {
+        console.log(`Retrying in ${retryInterval / 1000} seconds...`);
+        await new Promise((resolve) => setTimeout(resolve, retryInterval));
+      }
+    }
+  }
+
+  if (!connected) {
+    throw new Error("Failed to connect to database after multiple attempts.");
+  }
 
   await setUpDatabase();
 }
@@ -53,6 +76,8 @@ async function setUpDatabase() {
   );
 
   console.log(createTableResult);
+
+  console.log("History Database Set Up!");
 }
 
 async function getAttemptDetailsFromDatabase(userId) {

HistoryService/Controllers/HistoryRoutesController.js

@@ -12,7 +12,7 @@ const getAttemptDetails = async (req, res, next) => {
     if (result[0].length === 0) {
       res.status(404).json({
         message: "NO HISTORY DATA FOUND: GET USER ATTEMPT HISTORY",
-        result: [0],
+        result: result[0],
       });
 
       return;

README.md

@@ -31,3 +31,7 @@
 ## GPT Service Build and Test
 
 ![Communication Service Build and Test](https://github.com/CS3219-AY2324S1/ay2324s1-course-assessment-g16/actions/workflows/build_and_test_master_gpt_service.yaml/badge.svg)
+
+## History Service Build and Test
+
+![Communication Service Build and Test](https://github.com/CS3219-AY2324S1/ay2324s1-course-assessment-g16/actions/workflows/build_and_test_master_history_service.yaml/badge.svg)