101 lines
3.2 KiB
PHP
101 lines
3.2 KiB
PHP
<?php
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namespace App\Services;
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use App\Models\ChecklistTemplate;
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use App\Models\Submission;
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/**
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* Mengira hasil formula seksyen (A, B, C, D, E ...) berdasarkan jawapan serahan.
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*
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* Token tersedia kepada formula:
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* - formula_token bagi setiap checklist_item (cth: SKOP1, EE, RE, D4I)
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* - result_token bagi setiap formula yang telah dikira sebelumnya (cth: A, B)
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*
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* Formula dinilai mengikut turutan `order` supaya C boleh merujuk A & B, dsb.
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*/
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class FormulaService
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{
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public function __construct(protected ExpressionEvaluator $evaluator) {}
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/**
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* Kira semua hasil formula bagi satu serahan.
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*
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* @return array<int, array{result_token:string,label:?string,value:?float,unit:?string}>
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*/
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public function computeForSubmission(Submission $submission): array
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{
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$template = $submission->checklistTemplate
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?: ($submission->checklist_template_id ? ChecklistTemplate::find($submission->checklist_template_id) : ChecklistTemplate::activeTemplate());
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if (! $template) {
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return [];
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}
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// Bina peta token => nilai daripada jawapan item.
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$variables = [];
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$answers = $submission->relationLoaded('answers')
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? $submission->answers
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: $submission->answers()->with('item')->get();
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foreach ($answers as $answer) {
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$item = $answer->item;
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if ($item && $item->formula_token) {
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$variables[$item->formula_token] = is_numeric($answer->value) ? (float) $answer->value : 0.0;
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}
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}
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return $this->compute($template, $variables);
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}
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/**
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* Kira hasil formula daripada peta pemboleh ubah mentah (berguna untuk ujian).
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*
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* @param array<string, float|int|null> $variables
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* @return array<int, array{result_token:string,label:?string,value:?float,unit:?string}>
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*/
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public function compute(ChecklistTemplate $template, array $variables): array
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{
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$formulas = $template->relationLoaded('formulas')
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? $template->formulas->sortBy('order')
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: $template->formulas()->orderBy('order')->get();
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$results = [];
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foreach ($formulas as $formula) {
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$value = $this->evaluator->evaluate($formula->expression, $variables, $formula->guard_div_zero);
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// Hasil ini menjadi token yang boleh dirujuk oleh formula seterusnya.
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$variables[$formula->result_token] = $value ?? 0.0;
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$results[] = [
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'result_token' => $formula->result_token,
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'label' => $formula->label,
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'value' => $value,
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'unit' => $formula->unit,
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];
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}
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return $results;
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}
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/**
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* Kira semula dan simpan hasil ke dalam jadual submission_results.
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*/
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public function recalculateAndStore(Submission $submission): void
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{
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$results = $this->computeForSubmission($submission);
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foreach ($results as $r) {
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$submission->results()->updateOrCreate(
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['result_token' => $r['result_token']],
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[
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'label' => $r['label'],
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'value' => $r['value'],
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'unit' => $r['unit'],
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]
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);
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}
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}
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}
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