Added day plan sample export page

app/Exports/DayPlanSampleExport.php

@@ -0,0 +1,150 @@
+<?php
+
+namespace App\Exports;
+
+use App\Models\ProductionPlan;
+use App\Models\Plant;
+use Carbon\Carbon;
+use Maatwebsite\Excel\Concerns\FromArray;
+
+class DayPlanSampleExport implements FromArray
+{
+    protected $plantId;
+    protected $lineId;
+    protected $year;
+    protected $month;
+    protected $week;
+
+    public function __construct($plantId, $lineId, $year, $month, $week)
+    {
+        $this->plantId = $plantId;
+        $this->lineId = $lineId;
+        $this->year = $year;
+        $this->month = $month;
+        $this->week = strtolower($week);
+    }
+
+    public function array(): array
+    {
+        $weekMapping = [
+            'week_1' => 1,
+            'week_2' => 8,
+            'week_3' => 15,
+            'week_4' => 22,
+            'week_5' => 29,
+        ];
+
+        $daysInMonth = Carbon::create(
+            $this->year,
+            $this->month,
+            1
+        )->daysInMonth;
+
+        if ($this->week === 'all_weeks') {
+
+            $startDay = 1;
+            $maxDays = $daysInMonth;
+
+        } else {
+
+            if (!isset($weekMapping[$this->week])) {
+                throw new \Exception('Please select a valid week.');
+            }
+
+            $startDay = $weekMapping[$this->week];
+
+            $daysInMonth = Carbon::create(
+                $this->year,
+                $this->month,
+                1
+            )->daysInMonth;
+
+            $maxDays = min(7, $daysInMonth - $startDay + 1);
+
+            if ($maxDays <= 0) {
+                throw new \Exception('Selected week has no dates in this month.');
+            }
+        }
+
+        // Plant Code
+        $plant = Plant::find($this->plantId);
+
+        if (!$plant) {
+            throw new \Exception('Plant not found.');
+        }
+
+        // Excel headings
+        $headings = [
+            'Plant Code',
+            'Item Code',
+        ];
+
+        $selectedDates = [];
+
+        for ($i = 0; $i < $maxDays; $i++) {
+
+            $day = $startDay + $i;
+
+            $date = Carbon::create(
+                $this->year,
+                $this->month,
+                $day
+            );
+
+            $selectedDates[] = $date->format('Y-m-d');
+
+            $headings[] = $date->format('d-m-Y');
+        }
+
+        // Existing monthly production plans
+        $plans = ProductionPlan::where('plant_id', $this->plantId)
+            ->where('line_id', $this->lineId)
+            ->whereMonth('created_at', $this->month)
+            ->whereYear('created_at', $this->year)
+            ->with('item')
+            ->get();
+
+        $excelRows = [];
+
+        foreach ($plans as $plan) {
+
+            $itemCode = $plan->item->code ?? '';
+
+            // Get leave dates
+            $leaveDates = $plan->leave_dates ?? [];
+
+            if (is_string($leaveDates)) {
+                $leaveDates = explode(',', $leaveDates);
+            }
+
+            $leaveDates = collect($leaveDates)
+                ->map(fn ($date) => trim($date))
+                ->filter()
+                ->map(fn ($date) => Carbon::parse($date)->format('Y-m-d'))
+                ->toArray();
+
+            $row = [
+                $plant->code,
+                $itemCode,
+            ];
+
+            foreach ($selectedDates as $date) {
+
+                // Leave date quantity is 0
+                if (in_array($date, $leaveDates)) {
+                    $row[] = 0;
+                } else {
+                    // Sample default quantity
+                    $row[] = 0;
+                }
+            }
+
+            $excelRows[] = $row;
+        }
+
+        return array_merge(
+            [$headings],
+            $excelRows
+        );
+    }
+}