Add option to set exportFormat from Column builder.

Author: yajra

README.md

@@ -86,6 +86,15 @@ You can set the export type by setting the property to `csv` or `xlsx`. Default
 <livewire:export-button :table-id="$dataTable->getTableId()" type="csv" />
 ```
 
+## Formatting Columns
+
+You can format column by setting it via Column definition on you DataTable service class.
+
+```phpt
+Column::make('mobile')->exportFormat('00000000000'),
+```
+
+The format above will treat mobile numbers with leading zeroes.
 
 ## Contributing
 

src/Exports/DataTableQueuedExport.php

@@ -5,11 +5,13 @@
 use Illuminate\Support\Collection;
 use Maatwebsite\Excel\Concerns\Exportable;
 use Maatwebsite\Excel\Concerns\FromQuery;
+use Maatwebsite\Excel\Concerns\WithColumnFormatting;
 use Maatwebsite\Excel\Concerns\WithHeadings;
 use Maatwebsite\Excel\Concerns\WithMapping;
+use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 use Yajra\DataTables\Html\Column;
 
-class DataTableQueuedExport implements FromQuery, WithMapping, WithHeadings
+class DataTableQueuedExport implements FromQuery, WithMapping, WithHeadings, WithColumnFormatting
 {
     use Exportable;
 
@@ -40,4 +42,26 @@ public function headings(): array
     {
         return $this->columns->pluck('title')->toArray();
     }
+
+    public function columnFormats(): array
+    {
+        $formats = [];
+
+        $this->columns
+            ->each(function (Column $column, $index) use (&$formats) {
+                $formats[$this->num2alpha($index - 1)] = $column['exportFormat'] ?? NumberFormat::FORMAT_TEXT;
+            })
+            ->toArray();
+
+        return $formats;
+    }
+
+    protected function num2alpha($n)
+    {
+        for ($r = ""; $n >= 0; $n = intval($n / 26) - 1) {
+            $r = chr($n % 26 + 0x41) . $r;
+        }
+
+        return $r;
+    }
 }