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<?php
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namespace App\Http\Controllers\Api;
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use App\Models\Calendar;
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use App\Models\Configuration;
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use App\Models\Homework;
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use Illuminate\Support\Facades\DB;
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use Symfony\Component\HttpFoundation\Response;
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class HomeworkTrackingController extends BaseApiController
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{
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protected Calendar $calendar;
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protected Homework $homework;
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protected Configuration $config;
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protected string $schoolYear;
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protected string $semester;
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public function __construct()
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{
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parent::__construct();
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$this->calendar = model(Calendar::class);
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$this->homework = model(Homework::class);
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$this->config = model(Configuration::class);
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$this->schoolYear = (string) ($this->config->getConfig('school_year') ?? '');
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$this->semester = (string) ($this->config->getConfig('semester') ?? '');
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}
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/**
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* Get homework tracking data with Sunday-based schedule
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*/
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public function index()
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{
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try {
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// Get date range from request or use defaults
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$startDate = $this->request->getGet('start_date') ?? '2025-09-21';
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$endDate = $this->request->getGet('end_date') ?? '2026-01-18';
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// Parse dates
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try {
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$start = new \DateTime($startDate);
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} catch (\Throwable $e) {
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$start = new \DateTime('today');
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}
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try {
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$end = new \DateTime($endDate);
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} catch (\Throwable $e) {
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$end = new \DateTime('today');
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}
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// Move start to the first Sunday on/after start
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if ((int)$start->format('w') !== 0) {
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$start = (clone $start)->modify('next sunday');
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}
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// Collect all Sundays within range
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$sundays = [];
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$d = clone $start;
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while ($d <= $end) {
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$sundays[] = $d->format('Y-m-d');
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$d->modify('+7 days');
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}
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// Map "no school" events by date (Y-m-d) using explicit DB flag
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$events = $this->calendar->getEventsBySchoolYear($this->schoolYear) ?? [];
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$eventDays = [];
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foreach ($events as $ev) {
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$ymd = substr((string)($ev['date'] ?? $ev['start_date'] ?? ''), 0, 10);
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$no = (int)($ev['no_school'] ?? 0);
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if ($ymd && $no === 1) {
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$eventDays[$ymd] = true; // yellow highlight for no-school day
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}
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}
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// Map Sundays to ordinal homework_index, skipping event Sundays
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$dateToIndex = [];
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$idx = 0;
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foreach ($sundays as $ymd) {
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if (!isset($eventDays[$ymd])) {
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$idx++;
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$dateToIndex[$ymd] = $idx;
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} else {
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$dateToIndex[$ymd] = null; // event day (no homework expected)
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}
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}
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// Aggregate homework presence + first entered date per class_section_id + homework_index
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$rows = DB::table('homework')
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->select('class_section_id', 'homework_index', DB::raw('MIN(created_at) AS first_created'), DB::raw('COUNT(*) AS cnt'))
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->where('school_year', $this->schoolYear)
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->where('semester', $this->semester)
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->groupBy('class_section_id', 'homework_index')
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->get()
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->toArray();
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$hasHomework = [];
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$hwEnteredAt = [];
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foreach ($rows as $r) {
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$csid = (int)($r->class_section_id ?? 0);
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$hi = (int)($r->homework_index ?? 0);
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$cnt = (int)($r->cnt ?? 0);
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if ($csid > 0 && $hi > 0 && $cnt > 0) {
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$hasHomework[$csid][$hi] = true;
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$dateStr = substr((string)($r->first_created ?? ''), 0, 10);
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$hwEnteredAt[$csid][$hi] = $dateStr ?: null;
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}
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}
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// Build date-based presence mapped to the nearest prior non-NoSchool Sunday
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$rowsByDate = DB::table('homework')
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->select(DB::raw('class_section_id, DATE(created_at) AS hw_date, MIN(created_at) AS first_created, COUNT(*) AS cnt'))
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->where('school_year', $this->schoolYear)
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->where('semester', $this->semester)
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->groupBy(DB::raw('class_section_id, DATE(created_at)'))
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->orderBy('hw_date', 'ASC')
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->get()
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->toArray();
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$hasHomeworkByDate = [];
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$hwEnteredAtByDate = [];
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foreach ($rowsByDate as $r) {
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$csid = (int)($r->class_section_id ?? 0);
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$d = substr((string)($r->hw_date ?? ''), 0, 10);
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$cnt = (int)($r->cnt ?? 0);
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$firstCreated = substr((string)($r->first_created ?? ''), 0, 10);
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if ($csid <= 0 || !$d || $cnt <= 0) {
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continue;
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}
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// Find the index of the last Sunday on or before $d
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$baseIndex = -1;
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for ($i = count($sundays) - 1; $i >= 0; $i--) {
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if ($sundays[$i] <= $d) {
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$baseIndex = $i;
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break;
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}
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}
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if ($baseIndex < 0) {
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continue;
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}
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// Map this homework day to only the nearest prior non–No School Sunday
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$j = $baseIndex;
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while ($j >= 0 && !empty($eventDays[$sundays[$j]])) {
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$j--;
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}
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if ($j < 0) {
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continue;
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}
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$sd = $sundays[$j];
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// Mark homework on that Sunday for this class_section (single mapping)
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$hasHomeworkByDate[$csid][$sd] = true;
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if (empty($hwEnteredAtByDate[$csid][$sd])) {
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$hwEnteredAtByDate[$csid][$sd] = $firstCreated ?: $d;
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} else {
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// Keep the earliest date for display
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$existing = (string)$hwEnteredAtByDate[$csid][$sd];
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$candidate = $firstCreated ?: $d;
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if ($candidate && (!$existing || $candidate < $existing)) {
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$hwEnteredAtByDate[$csid][$sd] = $candidate;
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}
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}
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}
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// Fetch teachers and TAs per section for this term
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$teacherRows = DB::table('teacher_class as tc')
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->select('tc.class_section_id', 'tc.position', 'cs.class_section_name', 'cs.class_id', 'u.firstname', 'u.lastname')
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->leftJoin('classSection as cs', 'cs.class_section_id', '=', 'tc.class_section_id')
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->leftJoin('users as u', 'u.id', '=', 'tc.teacher_id')
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->where('tc.school_year', $this->schoolYear)
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->where('tc.semester', $this->semester)
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->whereNotNull('tc.class_section_id')
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->whereIn('tc.position', ['main', 'ta'])
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->orderBy('cs.class_id', 'ASC')
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->orderBy('cs.class_section_name', 'ASC')
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->orderByRaw("FIELD(tc.position, 'main','ta')")
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->orderBy('u.firstname', 'ASC')
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->get()
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->toArray();
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$bySection = [];
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foreach ($teacherRows as $r) {
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$sid = (int)($r->class_section_id ?? 0);
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if ($sid <= 0) continue;
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if (!isset($bySection[$sid])) {
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$bySection[$sid] = [
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'class_section_id' => $sid,
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'class_id' => (int)($r->class_id ?? 0),
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'class_section_name' => (string)($r->class_section_name ?? ''),
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'teachers' => [],
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'tas' => [],
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];
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}
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$name = trim(($r->firstname ?? '') . ' ' . ($r->lastname ?? ''));
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$pos = strtolower((string)($r->position ?? ''));
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if ($name !== '') {
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if ($pos === 'main') {
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$bySection[$sid]['teachers'][] = $name;
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} elseif ($pos === 'ta') {
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$bySection[$sid]['tas'][] = $name;
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}
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}
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}
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$teachers = array_values($bySection);
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// Sort by grade order: KG(13) → Grade 1..11 → Youth(12) → others
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usort($teachers, function ($a, $b) {
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$ai = (int)($a['class_id'] ?? 0);
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$bi = (int)($b['class_id'] ?? 0);
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$ord = function ($cid) {
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if ($cid === 13) return 0; // KG first
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if ($cid >= 1 && $cid <= 11) return $cid; // Grades 1..11
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if ($cid === 12) return 99; // Youth last of known
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return 200 + $cid; // any others after
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};
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$cmp = $ord($ai) <=> $ord($bi);
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if ($cmp !== 0) return $cmp;
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return strnatcasecmp($a['class_section_name'] ?? '', $b['class_section_name'] ?? '');
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});
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// Simple server-side pagination for rows (8 lines per page)
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$perPage = 8;
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$totalRows = count($teachers);
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$totalPages = max(1, (int)ceil($totalRows / $perPage));
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$page = (int) ($this->request->getGet('page') ?? 1);
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if ($page < 1) $page = 1;
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if ($page > $totalPages) $page = $totalPages;
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$offset = ($page - 1) * $perPage;
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$teachersPage = array_slice($teachers, $offset, $perPage);
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return $this->success([
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'semester' => $this->semester,
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'school_year' => $this->schoolYear,
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'sundays' => $sundays,
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'event_days' => $eventDays,
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'date_to_index' => $dateToIndex,
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'teachers' => $teachersPage,
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'has_homework' => $hasHomework,
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'hw_entered_at' => $hwEnteredAt,
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'has_homework_by_date' => $hasHomeworkByDate,
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'hw_entered_at_by_date' => $hwEnteredAtByDate,
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'pagination' => [
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'page' => $page,
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'total_pages' => $totalPages,
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'per_page' => $perPage,
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'total_rows' => $totalRows,
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],
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], 'Homework tracking retrieved successfully');
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} catch (\Throwable $e) {
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log_message('error', 'Homework tracking error: ' . $e->getMessage());
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return $this->respondError('Failed to retrieve homework tracking: ' . $e->getMessage(), Response::HTTP_INTERNAL_SERVER_ERROR);
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}
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}
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}
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