add inventory and supply logic
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@@ -0,0 +1,298 @@
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<?php
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namespace App\Services\Inventory;
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use App\Models\ClassSection;
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use App\Models\InventoryItem;
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use App\Models\InventoryMovement;
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use App\Models\StudentClass;
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use App\Models\TeacherClass;
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use App\Models\User;
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use Illuminate\Support\Facades\DB;
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use Illuminate\Support\Facades\Log;
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class InventoryTeacherDistributionService
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{
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public function __construct(
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private InventoryContextService $context,
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private InventoryMovementService $movementService
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) {
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}
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public function formData(int $userId, ?int $classSectionId, ?int $itemId): array
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{
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$ctx = $this->buildTeacherClassContext($userId);
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if (!$ctx['ok']) {
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return $ctx;
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}
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$classIds = $ctx['classSectionIds'];
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$lockClassSection = count($classIds) === 1;
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$selectedClassId = $lockClassSection
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? (int) ($ctx['defaultClassSectionId'] ?? 0)
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: (int) ($classSectionId ?? ($ctx['defaultClassSectionId'] ?? 0));
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$classID = null;
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if (!empty($selectedClassId)) {
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$classID = ClassSection::getClassId($selectedClassId);
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$classID = $classID !== null ? (int) $classID : null;
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}
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$builder = DB::table('inventory_items as i')
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->select('i.id', 'i.name', 'i.isbn', 'i.edition', 'i.quantity', 'i.category_id', 'i.type', 'c.name as category_name', 'c.grade_min', 'c.grade_max')
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->leftJoin('inventory_categories as c', 'c.id', '=', 'i.category_id')
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->where('i.type', 'book');
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if (!empty($classID)) {
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$builder->where(function ($q) use ($classID) {
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$q->where(function ($inner) use ($classID) {
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$inner->whereNotNull('c.grade_min')
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->whereNotNull('c.grade_max')
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->where('c.grade_min', '<=', $classID)
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->where('c.grade_max', '>=', $classID);
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})->orWhere(function ($inner) use ($classID) {
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$inner->whereNotNull('c.grade_min')
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->whereNull('c.grade_max')
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->where('c.grade_min', $classID);
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})->orWhere(function ($inner) use ($classID) {
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$inner->whereNotNull('c.grade_max')
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->whereNull('c.grade_min')
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->where('c.grade_max', $classID);
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});
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});
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}
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$rows = $builder->orderBy('i.name')->get()->map(fn ($r) => (array) $r)->all();
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$labelFor = static function (?array $r): string {
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$name = $r['category_name'] ?? 'Uncategorized';
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$gmin = $r['grade_min'] ?? null;
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$gmax = $r['grade_max'] ?? null;
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if ($gmin === null && $gmax === null) return $name;
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if ($gmin !== null && $gmax !== null) return $name . ' (G' . (int) $gmin . '–G' . (int) $gmax . ')';
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if ($gmin !== null) return $name . ' (G' . (int) $gmin . '+)';
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return $name . ' (≤G' . (int) $gmax . ')';
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};
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$booksGrouped = [];
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foreach ($rows as $r) {
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$catId = (int) ($r['category_id'] ?? 0);
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if (!isset($booksGrouped[$catId])) {
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$booksGrouped[$catId] = [
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'label' => $labelFor($r),
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'items' => [],
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];
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}
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$display = $r['name'];
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if (!empty($r['isbn'])) {
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$display .= ' — ISBN ' . $r['isbn'];
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}
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if (!empty($r['edition'])) {
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$display .= ' (' . $r['edition'] . ')';
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}
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$booksGrouped[$catId]['items'][] = [
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'id' => (int) $r['id'],
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'display' => $display,
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'quantity' => (int) ($r['quantity'] ?? 0),
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];
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}
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uasort($booksGrouped, fn ($a, $b) => strnatcasecmp($a['label'], $b['label']));
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foreach ($booksGrouped as &$grp) {
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usort($grp['items'], fn ($x, $y) => strnatcasecmp($x['display'], $y['display']));
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}
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unset($grp);
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$students = $ctx['studentsData'][$selectedClassId] ?? [];
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$already = [];
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$itemId = (int) ($itemId ?? 0);
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if ($itemId && $selectedClassId) {
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$rowsHist = InventoryMovement::query()
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->selectRaw('student_id, SUM(CASE WHEN qty_change < 0 THEN -qty_change ELSE 0 END) AS qty')
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->where([
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'item_id' => $itemId,
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'movement_type' => 'distribution',
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'class_section_id' => $selectedClassId,
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'school_year' => $ctx['schoolYear'],
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])
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->groupBy('student_id')
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->get()
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->map(fn ($r) => (array) $r)
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->all();
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foreach ($rowsHist as $r) {
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$sid = (int) ($r['student_id'] ?? 0);
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if ($sid) $already[$sid] = (int) ($r['qty'] ?? 0);
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}
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}
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$onHand = 0;
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if ($itemId) {
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$book = InventoryItem::query()->find($itemId);
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if ($book && $book->type === 'book') {
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$onHand = (int) ($book->quantity ?? 0);
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}
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}
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return [
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'ok' => true,
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'booksGrouped' => $booksGrouped,
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'items' => $rows,
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'classes' => $ctx['classes'],
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'class_section_id' => $selectedClassId,
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'lockClassSection' => $lockClassSection,
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'item_id' => $itemId,
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'students' => $students,
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'already' => $already,
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'onHand' => $onHand,
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'schoolYear' => $ctx['schoolYear'],
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'semester' => $ctx['semester'],
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];
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}
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public function distribute(int $userId, array $payload): array
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{
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$ctx = $this->buildTeacherClassContext($userId);
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if (!$ctx['ok']) {
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return $ctx;
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}
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$itemId = (int) ($payload['item_id'] ?? 0);
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$postedClassId = (int) ($payload['class_section_id'] ?? 0);
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$selectedIds = array_values(array_unique(array_map('intval', $payload['student_ids'] ?? [])));
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$note = (string) ($payload['note'] ?? '');
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$classIds = $ctx['classSectionIds'];
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$classSectionId = (count($classIds) === 1)
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? (int) $classIds[0]
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: (in_array($postedClassId, $classIds, true) ? $postedClassId : 0);
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if (!$classSectionId) {
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return ['ok' => false, 'message' => 'Invalid class selection.'];
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}
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$book = InventoryItem::query()->find($itemId);
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if (!$book || $book->type !== 'book') {
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return ['ok' => false, 'message' => 'Invalid book.'];
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}
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$students = $ctx['studentsData'][$classSectionId] ?? [];
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$validIds = [];
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foreach ($students as $st) {
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$sid = $st['student_id'] ?? ($st['id'] ?? null);
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if ($sid) $validIds[(int) $sid] = true;
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}
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$selectedIds = array_values(array_filter($selectedIds, fn ($sid) => isset($validIds[$sid])));
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$already = [];
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$rows = InventoryMovement::query()
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->selectRaw('student_id, SUM(CASE WHEN qty_change < 0 THEN -qty_change ELSE 0 END) AS qty')
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->where([
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'item_id' => $itemId,
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'movement_type' => 'distribution',
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'class_section_id' => $classSectionId,
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'school_year' => $ctx['schoolYear'],
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])
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->groupBy('student_id')
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->get()
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->map(fn ($r) => (array) $r)
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->all();
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foreach ($rows as $r) {
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$sid = (int) ($r['student_id'] ?? 0);
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if ($sid) $already[$sid] = (int) ($r['qty'] ?? 0);
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}
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$toGive = [];
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foreach ($selectedIds as $sid) {
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if (($already[$sid] ?? 0) < 1) {
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$toGive[] = $sid;
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}
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}
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$needed = count($toGive);
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$onHand = (int) ($book->quantity ?? 0);
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if ($needed > $onHand) {
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return ['ok' => false, 'message' => 'Not enough stock to complete distribution.'];
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}
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$okCount = 0;
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foreach ($toGive as $sid) {
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$ok = $this->movementService->recordMovement($itemId, -1, 'distribution', 'Teacher distribution', $note, $classSectionId, $sid, $userId);
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if ($ok) {
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$okCount++;
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}
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}
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return [
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'ok' => true,
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'distributed' => $okCount,
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'already_assigned' => count($selectedIds) - $okCount,
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];
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}
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private function buildTeacherClassContext(int $userId): array
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{
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if ($userId <= 0) {
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return ['ok' => false, 'message' => 'Please log in first.'];
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}
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$classes = TeacherClass::getClassAssignmentsByUserId($userId, $this->context->schoolYear());
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if (empty($classes)) {
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return ['ok' => false, 'message' => 'You do not have an assigned class yet.'];
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}
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$user = User::query()->find($userId);
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if (!$user) {
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return ['ok' => false, 'message' => 'User not found.'];
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}
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$roles = DB::table('user_roles as ur')
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->join('roles as r', 'r.id', '=', 'ur.role_id')
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->where('ur.user_id', $userId)
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->pluck('r.name')
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->toArray();
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if (!in_array('teacher', $roles, true) && !in_array('teacher_assistant', $roles, true)) {
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return ['ok' => false, 'message' => 'Access denied.'];
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}
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$classSectionIds = array_column($classes, 'class_section_id');
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$studentsData = [];
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if (!empty($classSectionIds)) {
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$students = StudentClass::getStudentsByClassSectionIds($classSectionIds);
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foreach ($students as $student) {
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$studentsData[$student['class_section_id']][] = $student;
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}
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}
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$taAssignments = TeacherClass::query()
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->whereIn('class_section_id', $classSectionIds)
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->where('school_year', $this->context->schoolYear())
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->where('position', 'ta')
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->get()
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->toArray();
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$taNames = [];
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foreach ($taAssignments as $ta) {
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$taUser = User::query()->find($ta['teacher_id'] ?? 0);
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if ($taUser) {
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$csid = $ta['class_section_id'];
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$taNames[$csid][] = trim(($taUser->firstname ?? '') . ' ' . ($taUser->lastname ?? ''));
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}
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}
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$defaultClassSectionId = $classSectionIds[0] ?? null;
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return [
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'ok' => true,
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'classes' => $classes,
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'classSectionIds' => $classSectionIds,
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'studentsData' => $studentsData,
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'taNames' => $taNames,
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'defaultClassSectionId' => $defaultClassSectionId,
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'schoolYear' => $this->context->schoolYear(),
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'semester' => $this->context->semester(),
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];
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}
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}
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