From a75444f1c7616fb4d96902c822a7cbf6eac45922 Mon Sep 17 00:00:00 2001
From: Peter Steenbergen <psteenbergen@gmail.com>
Date: Fri, 9 Aug 2019 14:30:28 +0200
Subject: [PATCH] Added PageExtractor Class

---
 CHANGELOG.md          | 11 +++++++-
 README.md             | 12 ++++++++-
 src/PageExtractor.php | 60 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+), 2 deletions(-)
 create mode 100644 src/PageExtractor.php

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0667be..6186fdf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,9 +2,18 @@
 
 All notable changes to `pdf-tools` will be documented in this file.
 
+### 0.3 - 2019-08-09
+Note when you want to use the PageExtractor you would have ghostscript installed on your OS. 
+
+- Added PageExtractor which can make smaller single-page PDF file
+
+### 0.2 - 2019-07-21
+
+- Added JPG Exporter
+
 ### 0.1 - 2019-07-14
 
 - Initial release
 - Get information from a PDF file
 - Separate a single PDF with multiple pages to multiple single pages
-- Get text from a PDF file
\ No newline at end of file
+- Get text from a PDF file
diff --git a/README.md b/README.md
index 8bfb4ab..88977a6 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ This library depends on poppler utils which can be installed by the following.
 Debian / Ubuntu
 ```bash
 apt install poppler-utils
+apt install ghostscript
 ```
 
 OSX
@@ -32,6 +33,15 @@ $pdf = new ThreeWS\PdfTools\Info('location_to_pdf.pdf');
 var_dump($pdf->toArray());
 ```
 
+### Jpg
+
+Convert a PDF page to a JPG file.
+
+```php
+$pdf = new ThreeWS\PdfTools\Jpg('location_to_pdf.pdf', 60, 'y');
+var_dump($pdf->convert());
+```
+
 ### Separate
 
 Convert a PDF file with multiple pages into multiple single page PDF's using a pattern with replacement of %d.
@@ -47,4 +57,4 @@ Extract Text from a PDF file.
 ```php
 $pdf = new ThreeWS\PdfTools\Text('location_to_pdf.pdf');
 var_dump($pdf->convert());
-```
\ No newline at end of file
+```
diff --git a/src/PageExtractor.php b/src/PageExtractor.php
new file mode 100644
index 0000000..3295807
--- /dev/null
+++ b/src/PageExtractor.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace ThreeWS\PdfTools;
+
+use ThreeWS\PdfTools\Exceptions\OpenOutputException;
+use ThreeWS\PdfTools\Exceptions\OpenPDFException;
+use ThreeWS\PdfTools\Exceptions\OtherException;
+use ThreeWS\PdfTools\Exceptions\PDFPermissionException;
+
+class PageExtractor
+{
+    protected $file;
+    protected $outputfile;
+    protected $page;
+
+    public function __construct($file, $page, $outputfile = null)
+    {
+        $this->file = $file;
+        $this->outputfile = $outputfile;
+        $this->page = $page;
+    }
+
+    public function convert()
+    {
+        if (is_null($this->outputfile)) {
+            if (strtolower(substr($this->file, -4)) == '.pdf') {
+                $parts = explode('.pdf', $this->file);
+                $outputfile = $parts[0].'-'.escapeshellarg($this->page).'.pdf';
+            } else {
+                $outputfile = escapeshellarg($this->file).'-'.escapeshellarg($this->page);
+            }
+        } else {
+            $outputfile = escapeshellarg($this->outputfile);
+        }
+
+        $file = escapeshellarg($this->file);
+        $page = escapeshellarg($this->page);
+
+        exec("ps2pdf -dFirstPage=$page -dLastPage=$page -dPDFSETTINGS=/ebook -dUseFlateCompression=true -dOptimize=true $file $outputfile", $output, $returnVar);
+
+        switch ($returnVar) {
+            case 1:
+                throw new OpenPDFException("Error opening PDF file: {$this->file}.");
+                break;
+            case 2:
+                throw new OpenOutputException();
+                break;
+            case 3:
+                throw new PDFPermissionException();
+                break;
+            case 99:
+                throw new OtherException();
+                break;
+            default:
+                break;
+        }
+
+        return $returnVar;
+    }
+}