rudimentary export options

app/Tables/CsvExporter.php

@@ -0,0 +1,52 @@
+<?php
+
+
+namespace App\Tables;
+
+
+class CsvExporter extends BaseExporter
+{
+    /**
+     * @return string - mime type for the downloaded file
+     */
+    protected function getMimeType()
+    {
+        return $this->wantDownload ? 'text/csv' : 'text/plain';
+    }
+
+    /**
+     * @return string - file extension for the downloaded file
+     */
+    protected function getFileExtension()
+    {
+        return 'csv';
+    }
+
+    /**
+     * Write the document to stdout ('php://output')
+     */
+    protected function writeDocument()
+    {
+        $handle = fopen('php://output', 'w');
+
+        $columnNames = array_map(function (Column $c) {
+            return $c->title;
+        }, $this->columns);
+
+        fputcsv($handle, $columnNames);
+
+        foreach ($this->iterateRows() as $row) {
+            $items = [];
+            foreach ($this->columns as $column) {
+                if (isset($row->{$column->name})) {
+                    $items[] = $row->{$column->name};
+                } else {
+                    $items[] = null;
+                }
+            }
+            fputcsv($handle, $items);
+        }
+
+        fclose($handle);
+    }
+}