root
136 lines
4.2 KiB
PHP
136 lines
4.2 KiB
PHP
<?php
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namespace App\Services\ClassPreparation;
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use App\Models\ClassSection;
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use App\Models\Configuration;
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use Illuminate\Support\Facades\DB;
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class ClassPreparationCalculatorService
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{
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private array $allowedPrepCategories = [
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'Grade Box',
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'Large Table',
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'Regular Chair',
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'Small Chair',
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'Small Table',
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'Teacher Chair',
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'Trash Bin',
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'White Board',
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];
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public function getAllowedCategories(): array
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{
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return $this->allowedPrepCategories;
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}
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public function getClassLevelBySection(string $classSectionId): int
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{
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$sectionName = ClassSection::getClassSectionNameBySectionId($classSectionId);
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$label = $sectionName !== null && $sectionName !== '' ? (string) $sectionName : $classSectionId;
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if (preg_match('/^(kg|k)(\\b|[^a-z0-9])/i', $label)) {
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return 1;
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}
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$numValue = (int) preg_replace('/\\D/', '', $label);
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if ($numValue > 0 && $numValue < 30) {
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$firstDigit = (int) substr((string) $numValue, 0, 1);
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return $firstDigit === 1 ? 1 : ($firstDigit === 2 ? 2 : 3);
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}
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return 3;
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}
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public function calculatePrepItems(int $students, int $classLevel, string $classSectionId): array
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{
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$allowed = $this->allowedPrepCategories;
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$items = array_fill_keys($allowed, 0);
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$categories = DB::table('inventory_categories')
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->select('name', 'grade_min', 'grade_max')
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->where('type', 'classroom')
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->whereIn('name', $allowed)
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->orderBy('name')
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->get()
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->toArray();
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$isLowerGrades = in_array($classLevel, [1, 2], true);
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$teacherCount = $this->getTeacherCountForSection(
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$classSectionId,
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(string) Configuration::getConfig('school_year')
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);
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foreach ($categories as $cat) {
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$name = (string) $cat->name;
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$gradeMin = $cat->grade_min ?? null;
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$gradeMax = $cat->grade_max ?? null;
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if ($gradeMin !== null && $classLevel < (int) $gradeMin) {
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$items[$name] = 0;
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continue;
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}
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if ($gradeMax !== null && $classLevel > (int) $gradeMax) {
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$items[$name] = 0;
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continue;
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}
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$qty = 0;
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switch (strtolower($name)) {
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case 'small table':
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$qty = $isLowerGrades ? (int) ceil($students / 3) : 0;
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break;
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case 'large table':
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$qty = $isLowerGrades ? 0 : (int) ceil($students / 4);
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break;
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case 'small chair':
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$qty = $isLowerGrades ? $students : 0;
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break;
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case 'regular chair':
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$qty = $isLowerGrades ? 0 : $students;
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break;
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case 'teacher chair':
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$qty = $teacherCount > 0 ? (int) $teacherCount : 1;
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break;
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case 'trash bin':
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case 'white board':
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case 'grade box':
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$qty = 1;
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break;
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default:
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$qty = 0;
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}
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if (array_key_exists($name, $items)) {
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$items[$name] = $qty;
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}
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}
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return $items;
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}
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private function getTeacherCountForSection(string $classSectionId, ?string $schoolYear = null): int
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{
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$schoolYear = $schoolYear ?: (string) Configuration::getConfig('school_year');
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$baseQuery = DB::table('teacher_class')
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->select('COUNT(*) AS cnt')
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->where('class_section_id', $classSectionId)
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->whereIn('position', ['main', 'ta']);
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$row = $schoolYear !== null && $schoolYear !== ''
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? (clone $baseQuery)->where('school_year', $schoolYear)->first()
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: $baseQuery->first();
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$count = (int) ($row->cnt ?? 0);
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if ($count === 0 && $schoolYear !== null && $schoolYear !== '') {
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$row = $baseQuery->first();
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$count = (int) ($row->cnt ?? 0);
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}
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return $count;
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}
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}
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