recreate project

app/Services/SemesterRangeService.php

@@ -0,0 +1,148 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\ConfigurationModel;
+use DateTimeImmutable;
+
+class SemesterRangeService
+{
+    private ConfigurationModel $configModel;
+
+    public function __construct(?ConfigurationModel $configModel = null)
+    {
+        $this->configModel = $configModel ?? new ConfigurationModel();
+    }
+
+    public function getSchoolYearRange(string $schoolYear): array
+    {
+        $startCfg = (string)($this->configModel->getConfig('fall_semester_start') ?? '');
+        $endCfg   = (string)($this->configModel->getConfig('last_school_day') ?? '');
+
+        $start = null;
+        $end = null;
+        try {
+            if ($startCfg !== '') {
+                $start = new DateTimeImmutable($startCfg);
+            }
+        } catch (\Throwable) {
+            $start = null;
+        }
+        try {
+            if ($endCfg !== '') {
+                $end = new DateTimeImmutable($endCfg);
+            }
+        } catch (\Throwable) {
+            $end = null;
+        }
+
+        if ($start === null || $end === null) {
+            if (preg_match('/^(\d{4})-(\d{4})$/', $schoolYear, $m)) {
+                $y1 = (int)$m[1];
+                $y2 = (int)$m[2];
+                if ($start === null) {
+                    $start = new DateTimeImmutable($y1 . '-09-01');
+                }
+                if ($end === null) {
+                    $end = new DateTimeImmutable($y2 . '-06-30');
+                }
+            } else {
+                $currentYear = (int)date('Y');
+                if ($start === null) {
+                    $start = new DateTimeImmutable($currentYear . '-09-01');
+                }
+                if ($end === null) {
+                    $end = new DateTimeImmutable(($currentYear + 1) . '-06-30');
+                }
+            }
+        }
+
+        if ($end < $start) {
+            [$start, $end] = [$end, $start];
+        }
+
+        return [$start->format('Y-m-d'), $end->format('Y-m-d')];
+    }
+
+    public function getSemesterRange(string $schoolYear, string $semester): ?array
+    {
+        if (!preg_match('/^(\\d{4})-(\\d{4})$/', $schoolYear, $m)) {
+            return null;
+        }
+        $y1 = (int)$m[1];
+        $y2 = (int)$m[2];
+        $normalized = ucfirst(strtolower(trim($semester)));
+        if ($normalized === 'Fall') {
+            return [sprintf('%04d-09-21', $y1), sprintf('%04d-01-18', $y2)];
+        }
+        if ($normalized === 'Spring') {
+            return [sprintf('%04d-01-25', $y2), sprintf('%04d-05-31', $y2)];
+        }
+        return null;
+    }
+
+    public function normalizeSemester(?string $semester): string
+    {
+        $value = strtolower(trim((string)($semester ?? '')));
+        if ($value === 'fall') {
+            return 'Fall';
+        }
+        if ($value === 'spring') {
+            return 'Spring';
+        }
+        return '';
+    }
+
+    public function getSemesterForDate(?string $date = null): string
+    {
+        $fallStartCfg   = (string)($this->configModel->getConfig('fall_semester_start')   ?? '');
+        $springStartCfg = (string)($this->configModel->getConfig('spring_semester_start') ?? '');
+        $lastDayCfg     = (string)($this->configModel->getConfig('last_school_day')
+            ?? $this->configModel->getConfig('last_day_of_school') ?? '');
+
+        try {
+            $target = new DateTimeImmutable($date ?: 'now');
+        } catch (\Throwable) {
+            return '';
+        }
+
+        try {
+            $fallStart = $fallStartCfg !== '' ? new DateTimeImmutable($fallStartCfg) : null;
+        } catch (\Throwable) {
+            $fallStart = null;
+        }
+        try {
+            $springStart = $springStartCfg !== '' ? new DateTimeImmutable($springStartCfg) : null;
+        } catch (\Throwable) {
+            $springStart = null;
+        }
+        try {
+            $lastDay = $lastDayCfg !== '' ? new DateTimeImmutable($lastDayCfg) : null;
+        } catch (\Throwable) {
+            $lastDay = null;
+        }
+
+        if ($fallStart === null || $springStart === null || $lastDay === null) {
+            return '';
+        }
+
+        $target = $target->setTime(0, 0, 0);
+        $fallStart = $fallStart->setTime(0, 0, 0);
+        $springStart = $springStart->setTime(0, 0, 0);
+        $lastDay = $lastDay->setTime(0, 0, 0);
+
+        $nextFallStart = $fallStart <= $lastDay ? $fallStart->modify('+1 year') : $fallStart;
+
+        if (($fallStart <= $target && $target < $springStart)
+            || ($lastDay <= $target && $target < $nextFallStart)
+        ) {
+            return 'Fall';
+        }
+
+        if ($springStart <= $target && $target < $lastDay) {
+            return 'Spring';
+        }
+
+        return '';
+    }
+}