UC /users v1.0

UC/backend/src/db/jsonDatabaseManager.js

@@ -31,6 +31,48 @@ class JSONDatabase {
             console.error('Error writing file:', error);
         }
     }
+
+    isKeyValue(key, value) {
+        const data = this.readFile();
+        if (!data) {
+            return false;
+        }
+
+        for (const item of data) {
+            if (item[key] === value) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    findIndexByKeyValueInArray(key, value) {
+        const data = this.readFile();
+        if (!data || !Array.isArray(data)) {
+            return -1;
+        }
+
+        for (let i = 0; i < data.length; i++) {
+            if (data[i][key] === value) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    findByKeyValue(key, value) {
+        const data = this.readFile();
+        if (!data || !Array.isArray(data)) {
+            return null; // Database read failed or data is not an array
+        }
+
+        for (const item of data) {
+            if (item[key] === value) {
+                return item; // Return the object containing the specified key-value pair
+            }
+        }
+        return null; // No matching key-value pair found
+    }
 }
 
 const usersDB = new JSONDatabase(path.join(__dirname, 'users.json'));