fix: Parse error when user passed contains quotes (#378)

Author: DenverCoder1

.gitignore

@@ -5,6 +5,7 @@ node_modules/
 composer.phar
 yarn.lock
 package-lock.json
+.vercel
 
 # Local Configuration
 package.json

src/index.php

@@ -32,7 +32,8 @@
 
 try {
     // get streak stats for user given in query string
-    $contributionGraphs = getContributionGraphs($_REQUEST["user"]);
+    $user = preg_replace("/[^a-zA-Z0-9\-]/", "", $_REQUEST["user"]);
+    $contributionGraphs = getContributionGraphs($user);
     $contributions = getContributionDates($contributionGraphs);
     if (isset($_GET["mode"]) && $_GET["mode"] === "weekly") {
         $stats = getWeeklyContributionStats($contributions);

src/stats.php

@@ -191,13 +191,14 @@ function getContributionYears(string $user): array
     }";
     $response = fetchGraphQL($query);
     // User not found
-    if (!empty($response->errors) && $response->errors[0]->type === "NOT_FOUND") {
-        throw new InvalidArgumentException("Could not find a user with that name.", 404);
-    }
-    // API Error
     if (!empty($response->errors)) {
+        $type = $response->errors[0]->type ?? "";
+        if ($type === "NOT_FOUND") {
+            throw new InvalidArgumentException("Could not find a user with that name.", 404);
+        }
+        $message = $response->errors[0]->message ?? "An API error occurred.";
         // Other errors that contain a message field
-        throw new InvalidArgumentException($response->errors[0]->message, 500);
+        throw new InvalidArgumentException($message, 500);
     }
     // API did not return data
     if (!isset($response->data) && isset($response->message)) {