add class progress and fix endpoints

app/Services/ClassProgress/ClassProgressMetaService.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace App\Services\ClassProgress;
+
+use App\Models\SubjectCurriculum;
+
+class ClassProgressMetaService
+{
+    public function subjectSections(): array
+    {
+        return (array) config('progress.subject_sections', []);
+    }
+
+    public function statusOptions(): array
+    {
+        return (array) config('progress.status_options', []);
+    }
+
+    public function sundayOptions(int $count = 12): array
+    {
+        $start = now();
+        if ((int) $start->format('w') !== 0) {
+            $start = $start->next('Sunday');
+        }
+
+        $options = [];
+        for ($i = 0; $i < $count; $i++) {
+            $options[] = $start->format('Y-m-d');
+            $start = $start->addDays(7);
+        }
+
+        return $options;
+    }
+
+    public function curriculumOptions(?int $classId): array
+    {
+        if (!$classId) {
+            return [];
+        }
+
+        $options = [];
+        foreach ($this->subjectSections() as $slug => $section) {
+            $options[$slug] = SubjectCurriculum::getOptionsForClass((int) $classId, (string) $slug);
+        }
+
+        return $options;
+    }
+}