Merge pull request #12 from oguzhankrcb/master

Add split functionality to EasyPdf class

CHANGELOG.md

@@ -3,6 +3,9 @@ All notable changes to `easy-pdf` will be documented in this file.
 
 ## [Unreleased]
 
+## 2.5.0 - 2022-01-11
+- `splitTo()` method added to `Parser` class.
+
 ## 2.4.0 - 2022-05-30
 - `setPage()` method added for setting current page.
 

README.md

@@ -6,7 +6,7 @@
 [![Total Downloads](https://img.shields.io/packagist/dt/tarfin-labs/easy-pdf.svg?style=flat-square)](https://packagist.org/packages/tarfin-labs/easy-pdf)
 
 ## Introduction
-easy-pdf is a [tcpdf](https://tcpdf.org/) wrapper for Laravel 6.x, 7.x and 8.x.
+easy-pdf is a [tcpdf](https://tcpdf.org/) wrapper for Laravel 6.x, 7.x, 8.x and 9.x.
 
 ## Installation
 
@@ -116,6 +116,27 @@ $pdf = EasyPdf::merge($files)
             ->content();
 ```
 
+### Splitting pdf
+
+You can split pdf file into multiple pdf files easily using easy-pdf.
+``` php
+// Pdf path.
+// Pdf path can be path, url or blob.
+
+$file = '/path/to/the/file.pdf';
+
+// You can use splitTo method to get new pdf contents
+// chunkSize argument determines that how many page should contain every pdf file
+// For example if you want to split your pdf file as each file includes 10 page
+// Then you must set chunkSize argument to 10
+$pdfs = EasyPdf::parser($file)
+            ->splitTo(10);
+
+foreach($pdfs as $pdfContent) {
+    // Your code here
+}
+```
+
 ### Resetting the instance
 If you try to generate pdf inside a Laravel queue, sometimes there might occure an error like `undefined property: TCPDF::$h`.
 

src/Parser.php

@@ -3,6 +3,7 @@
 namespace TarfinLabs\EasyPdf;
 
 use setasign\Fpdi\PdfParser\StreamReader;
+use setasign\Fpdi\Tcpdf\Fpdi;
 
 class Parser extends BasePdf
 {
@@ -56,6 +57,41 @@ public function setPage(int $page)
         return $this;
     }
 
+    /**
+     * Returns splitted pdf file contents.
+     *
+     * @param  int  $chunkSize
+     * @return array
+     *
+     * @throws \setasign\Fpdi\PdfParser\CrossReference\CrossReferenceException
+     * @throws \setasign\Fpdi\PdfParser\Filter\FilterException
+     * @throws \setasign\Fpdi\PdfParser\PdfParserException
+     * @throws \setasign\Fpdi\PdfParser\Type\PdfTypeException
+     * @throws \setasign\Fpdi\PdfReader\PdfReaderException
+     */
+    public function splitTo(int $chunkSize)
+    {
+        $chunks = array_chunk(range(1, $this->count()), $chunkSize);
+
+        $streamReader = StreamReader::createByString($this->content);
+
+        $splittedFileContents = [];
+
+        foreach ($chunks as $chunk) {
+            $this->pdf = new Fpdi();
+            $this->pdf->setSourceFile($streamReader);
+
+            foreach ($chunk as $index) {
+                $this->pdf->AddPage();
+                $this->pdf->useTemplate($this->pdf->importPage($index));
+            }
+
+            $splittedFileContents[] = $this->pdf->Output('doc.pdf', 'S');
+        }
+
+        return $splittedFileContents;
+    }
+
     /**
      * Render given source.
      *

tests/ParserTest.php

@@ -65,4 +65,19 @@ public function it_can_return_pdf_content()
 
         $this->assertSame('application/pdf; charset=binary', $buffer);
     }
+
+    /** @test */
+    public function it_can_split_one_file_to_multiple_files()
+    {
+        $pdfs = EasyPdf::parser($this->file)
+            ->splitTo(1);
+
+        foreach ($pdfs as $pdf) {
+            $finfo = new finfo(FILEINFO_MIME);
+            $buffer = $finfo->buffer($pdf);
+            $this->assertSame('application/pdf; charset=binary', $buffer);
+        }
+
+        $this->assertCount(3, $pdfs);
+    }
 }