Implement deduplicateIssues to filter issues

fetchdata.js

@@ -326,3 +326,19 @@ function fetchQuery(query, variables, callback)  {
     		callback(data);
 	});
 }
+
+function deduplicateIssues(issues) {
+    const seen = new Set();
+    const uniqueIssues = [];
+
+    issues.forEach(issue => {
+        if (!issue || !issue.url) return;
+
+        if (!seen.has(issue.url)) {
+            seen.add(issue.url);
+            uniqueIssues.push(issue);
+        }
+    });
+
+    return uniqueIssues;
+}

tests/jest/sum.js

@@ -1,3 +1,9 @@
+function daysBetweenDates(date1, date2) {
+  const oneDay = 24 * 60 * 60 * 1000;
+  return Math.round((date2 - date1) / oneDay);
+}
+
+module.exports = daysBetweenDates;
 
 function sum(a, b) {
   return a + b;