prepare("SELECT COUNT(*) FROM election_assignments WHERE election_id = ? AND role_in_election = 'Voter'");
$totalVoters->execute([$electionId]);
$totalVoters = $totalVoters->fetchColumn();
$totalCandidates = $pdo->prepare("SELECT COUNT(*) FROM candidates WHERE election_id = ?");
$totalCandidates->execute([$electionId]);
$totalCandidates = $totalCandidates->fetchColumn();
$totalVotes = $pdo->prepare("SELECT COUNT(DISTINCT voter_id) FROM votes WHERE election_id = ?");
$totalVotes->execute([$electionId]);
$totalVotes = $totalVotes->fetchColumn();
// Chart Data: Participation per Grade Level
$gradeStats = $pdo->prepare("SELECT COALESCE(u.grade_level, 'Unknown') as label, COUNT(DISTINCT v.voter_id) as count
FROM users u JOIN votes v ON u.id = v.voter_id
WHERE v.election_id = ?
GROUP BY u.grade_level ORDER BY u.grade_level");
$gradeStats->execute([$electionId]);
$gradeStats = $gradeStats->fetchAll(PDO::FETCH_ASSOC);
// Chart Data: Participation per Track
$trackStats = $pdo->prepare("SELECT COALESCE(u.track, 'Unknown') as label, COUNT(DISTINCT v.voter_id) as count
FROM users u JOIN votes v ON u.id = v.voter_id
WHERE v.election_id = ?
GROUP BY u.track");
$trackStats->execute([$electionId]);
$trackStats = $trackStats->fetchAll(PDO::FETCH_ASSOC);
// Chart Data: Participation per Section
$sectionStats = $pdo->prepare("SELECT u.track, u.section as label, COUNT(DISTINCT v.voter_id) as count
FROM users u JOIN votes v ON u.id = v.voter_id
WHERE v.election_id = ?
GROUP BY u.track, u.section");
$sectionStats->execute([$electionId]);
$sectionStats = $sectionStats->fetchAll(PDO::FETCH_ASSOC);
// Tracks for dropdown
$tracks = array_unique(array_column($sectionStats, 'track'));
sort($tracks);
$projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Online Election System for Senior High School';
?>
Election Dashboard | <?= htmlspecialchars($projectDescription) ?>