Latest updates

get_qid_counts.php

@@ -0,0 +1,67 @@
+<?php
+header('Content-Type: application/json');
+
+// Basic input validation and sanitization
+if (!isset($_POST['qid']) || empty($_POST['qid'])) {
+    echo json_encode(['error' => 'Missing QID parameter']);
+    exit;
+}
+
+$qid = $_POST['qid'];
+
+// Database connection (adjust credentials accordingly)
+//
+$config = require 'config.php';
+$host = $config['db_host'];
+$db   = $config['db_name'];
+$user = $config['db_user'];
+$pass = $config['db_pass'];
+$charset = 'utf8mb4';
+
+$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
+$options = [
+    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+];
+
+try {
+    $pdo = new PDO($dsn, $user, $pass, $options);
+
+    $sql = "
+        SELECT value, COUNT(*) AS count
+        FROM Answers
+        WHERE QID = :qid
+          AND value BETWEEN -3 AND 3
+        GROUP BY value
+        ORDER BY value
+    ";
+
+    $stmt = $pdo->prepare($sql);
+    $stmt->execute(['qid' => $qid]);
+    $results = $stmt->fetchAll();
+
+    // Initialize array with all possible values from -3 to 3 with zero counts
+    $counts = [];
+    for ($i = -3; $i <= 3; $i++) {
+        $counts[$i] = 0;
+    }
+
+    // Fill in counts from query results
+    foreach ($results as $row) {
+        $counts[(int)$row['value']] = (int)$row['count'];
+    }
+
+    // Return as JSON array of objects [{value: -3, count: 5}, ...]
+    $response = [];
+    foreach ($counts as $value => $count) {
+        $response[] = ['value' => $value, 'count' => $count];
+    }
+
+    echo json_encode($response);
+
+} catch (PDOException $e) {
+    echo json_encode(['error' => 'Database error: ' . $e->getMessage()]);
+    exit;
+}
+
+