From dbece8d9b957ecdc1102b2fd231b41371b4f3c3a Mon Sep 17 00:00:00 2001
From: Eloar <eloar@itchaos.pl>
Date: Thu, 20 Oct 2022 08:42:43 +0200
Subject: [PATCH] Maatwebsite/Excel v3 support through new component

Created new PhpSpreadsheetExport component as compatible with
Maatwebsite/Excel v3 and newer. Needs PHP 7 to run
---
 README.md                               |  4 +-
 composer.json                           |  5 +-
 src/Components/ExcelExport.php          |  5 ++
 src/Components/PhpSpreadsheetExport.php | 96 +++++++++++++++++++++++++
 4 files changed, 107 insertions(+), 3 deletions(-)
 create mode 100644 src/Components/PhpSpreadsheetExport.php

diff --git a/README.md b/README.md
index 67d0d07..a7b5c10 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Laravel 4.X, Laravel 5.X and Laravel 6 are supported.
 
 * Laravel 4.X / 5.X / 6.X
 * laravelcollective/html package if you use Laravel5.X
-* php 5.4+
+* php 5.5+
 
 ## Installation
 
@@ -433,7 +433,7 @@ If you discover any security related issues, please email mail@vitaliy.in instea
 
 ## License
 
-© 2014&mdash;2019 Vitalii Stepanenko
+© 2014&mdash;2022 Vitalii Stepanenko
 
 Licensed under the MIT License. 
 
diff --git a/composer.json b/composer.json
index cc3e302..f8bace9 100644
--- a/composer.json
+++ b/composer.json
@@ -23,10 +23,13 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0",
+        "php": ">=5.5.0",
         "illuminate/support": ">=4.2",
         "nayjest/builder": "~2"
     },
+    "require-dev": {
+        "laravel/framework": "^5.5.0"
+    },
     "suggest": {
         "laravelcollective/html": "Required to work with Laravel 5.X",
         "maatwebsite/excel": "Required to work with Excel export component"
diff --git a/src/Components/ExcelExport.php b/src/Components/ExcelExport.php
index 78db5eb..69e0b90 100644
--- a/src/Components/ExcelExport.php
+++ b/src/Components/ExcelExport.php
@@ -209,6 +209,11 @@ protected function renderExcel()
     {
         /** @var Excel $excel */
         $excel = app('excel');
+
+        if (!method_exists($excel, 'create')) {
+            throw new \RuntimeException('U are most likely using Maatwebsite/Excel v3 or newer. Use PhpSpreadsheetExport component instead');
+        }
+
         $excel
             ->create($this->getFileName(), $this->getOnFileCreate())
             ->export($this->getExtension());
diff --git a/src/Components/PhpSpreadsheetExport.php b/src/Components/PhpSpreadsheetExport.php
new file mode 100644
index 0000000..18c8529
--- /dev/null
+++ b/src/Components/PhpSpreadsheetExport.php
@@ -0,0 +1,96 @@
+<?php
+
+namespace Nayjest\Grids\Components;
+
+
+use Generator;
+use Illuminate\Http\Exceptions\HttpResponseException;
+use Maatwebsite\Excel\Concerns\FromGenerator;
+use Maatwebsite\Excel\Concerns\WithEvents;
+use Maatwebsite\Excel\Concerns\WithHeadings;
+use Maatwebsite\Excel\Events\BeforeSheet;
+use Maatwebsite\Excel\Excel;
+use Maatwebsite\Excel\Exporter;
+use Nayjest\Grids\Grid;
+
+
+/**
+ * When using Maatwebsite/Excel v3 (or newer) which uses PhpSpreadsheet in place of PhpExcel
+ * use this export component in place of ExcelExport component. It provides same funcionality
+ * but uses newer API
+ * 
+ * Be careful this file is compatible with php version 7 and above. Don't try to use this
+ * component in projects using older PHP versions.
+ * 
+ * @author: Janusz Paszynski
+ * @package Nayjest\Grids\Components
+ */
+class PhpSpreadsheetExport extends ExcelExport implements FromGenerator, WithHeadings, WithEvents
+{
+    /** @var Exporter */
+    protected $exporter;
+
+    public function __construct()
+    {
+        if(!interface_exists('Maatwebsite\Excel\Exporter')) {
+            throw new \RuntimeException('It seems there is no Maatwebsite v3 installed. Install it or use ExcelExport component');
+        }
+    }
+
+    public function initialize(Grid $grid)
+    {
+        parent::initialize($grid);
+        $this->exporter = \app(Exporter::class);
+    }
+
+    /** @inheritDoc */
+    protected function renderExcel()
+    {
+        $response = $this->exporter->download($this, sprintf('%s.%s', $this->getFileName(), $this->getExtension()), Excel::XLSX);
+        throw new HttpResponseException($response);
+    }
+
+    /** @inheritDoc */
+    public function generator(): Generator
+    {
+        $columnsConfig = $this->grid->getConfig()->getColumns();
+        $provider = $this->grid->getConfig()->getDataProvider();
+        $this->resetPagination($provider);
+        $provider->reset();
+        while($row = $provider->getRow()) {
+            $output = [];
+            foreach($columnsConfig as $column) {
+                if ($this->isColumnExported($column)) {
+                    $output[] = $this->escapeString($column->getValue($row));
+                }
+            }
+            yield $output;
+        }
+    }
+
+	/**
+	 *
+	 * @return array
+	 */
+	function headings(): array
+    {
+        return $this->getHeaderRow();
+	}
+
+	/**
+	 *
+	 * @return array
+	 */
+	function registerEvents(): array
+    {
+        return [
+            BeforeSheet::class => function(BeforeSheet $event) {
+                $sheetTitle = $this->getSheetName();
+                if ($sheetTitle) {
+                    $event->sheet->setTitle($sheetTitle);
+                }
+            }
+        ];
+	}
+
+}