Segment view contract export option

app/Exports/SegmentContractsExport.php

@@ -0,0 +1,125 @@
+<?php
+
+namespace App\Exports;
+
+use App\Models\Contract;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Carbon;
+use Maatwebsite\Excel\Concerns\FromQuery;
+use Maatwebsite\Excel\Concerns\ShouldAutoSize;
+use Maatwebsite\Excel\Concerns\WithColumnFormatting;
+use Maatwebsite\Excel\Concerns\WithHeadings;
+use Maatwebsite\Excel\Concerns\WithMapping;
+use PhpOffice\PhpSpreadsheet\Shared\Date as ExcelDate;
+
+class SegmentContractsExport implements FromQuery, ShouldAutoSize, WithColumnFormatting, WithHeadings, WithMapping
+{
+    public const DATE_EXCEL_FORMAT = 'dd"."mm"."yyyy';
+
+    /**
+     * @var array<string, array{label: string}>
+     */
+    public const COLUMN_METADATA = [
+        'reference' => ['label' => 'Pogodba'],
+        'client_case' => ['label' => 'Primer'],
+        'client' => ['label' => 'Stranka'],
+        'type' => ['label' => 'Vrsta'],
+        'start_date' => ['label' => 'Začetek'],
+        'end_date' => ['label' => 'Konec'],
+        'account' => ['label' => 'Stanje'],
+    ];
+
+    /**
+     * @param  array<int, string>  $columns
+     */
+    public function __construct(private Builder $query, private array $columns) {}
+
+    /**
+     * @return array<int, string>
+     */
+    public static function allowedColumns(): array
+    {
+        return array_keys(self::COLUMN_METADATA);
+    }
+
+    public static function columnLabel(string $column): string
+    {
+        return self::COLUMN_METADATA[$column]['label'] ?? $column;
+    }
+
+    public function query(): Builder
+    {
+        return $this->query;
+    }
+
+    /**
+     * @return array<int, mixed>
+     */
+    public function map($row): array
+    {
+        return array_map(fn (string $column) => $this->resolveValue($row, $column), $this->columns);
+    }
+
+    /**
+     * @return array<int, string>
+     */
+    public function headings(): array
+    {
+        return array_map(fn (string $column) => self::columnLabel($column), $this->columns);
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function columnFormats(): array
+    {
+        $formats = [];
+
+        foreach ($this->columns as $index => $column) {
+            if (in_array($column, ['start_date', 'end_date'], true)) {
+                $formats[$this->columnLetter($index)] = self::DATE_EXCEL_FORMAT;
+            }
+        }
+
+        return $formats;
+    }
+
+    private function resolveValue(Contract $contract, string $column): mixed
+    {
+        return match ($column) {
+            'reference' => $contract->reference,
+            'client_case' => optional($contract->clientCase?->person)->full_name,
+            'client' => optional($contract->clientCase?->client?->person)->full_name,
+            'type' => optional($contract->type)->name,
+            'start_date' => $this->formatDate($contract->start_date),
+            'end_date' => $this->formatDate($contract->end_date),
+            'account' => optional($contract->account)->balance_amount,
+            default => null,
+        };
+    }
+
+    private function formatDate(mixed $value): ?float
+    {
+        $carbon = Carbon::make($value);
+
+        if (! $carbon) {
+            return null;
+        }
+
+        return ExcelDate::dateTimeToExcel($carbon->copy()->startOfDay());
+    }
+
+    private function columnLetter(int $index): string
+    {
+        $index++;
+        $letter = '';
+
+        while ($index > 0) {
+            $remainder = ($index - 1) % 26;
+            $letter = chr(65 + $remainder).$letter;
+            $index = intdiv($index - 1, 26);
+        }
+
+        return $letter;
+    }
+}