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lib/PdfParser/Element/ElementDate.php

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+<?php
+
+/**
+ * @file
+ *          This file is part of the PdfParser library.
+ *
+ * @author  Sébastien MALOT <sebastien@malot.fr>
+ * @date    2017-01-03
+ * @license LGPLv3
+ * @url     <https://github.com/smalot/pdfparser>
+ *
+ *  PdfParser is a pdf library written in PHPi, extraction oriented.
+ *  Copyright (C) 2017 - Sébastien MALOT <sebastien@malot.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.
+ *  If not, see <http://www.pdfparser.org/sites/default/LICENSE.txt>.
+ *
+ */
+
+namespace Smalot\PdfParser\Element;
+
+use Smalot\PdfParser\Element;
+use Smalot\PdfParser\Document;
+
+/**
+ * Class ElementDate
+ *
+ * @package Smalot\PdfParser\Element
+ */
+class ElementDate extends ElementString
+{
+    /**
+     * @var array
+     */
+    protected static $formats = array(
+        4  => 'Y',
+        6  => 'Ym',
+        8  => 'Ymd',
+        10 => 'YmdH',
+        12 => 'YmdHi',
+        14 => 'YmdHis',
+        15 => 'YmdHise',
+        17 => 'YmdHisO',
+        18 => 'YmdHisO',
+        19 => 'YmdHisO',
+    );
+
+    /**
+     * @var string
+     */
+    protected $format = 'c';
+
+    /**
+     * @param \DateTime $value
+     * @param Document  $document
+     */
+    public function __construct($value, Document $document = null)
+    {
+        if (!($value instanceof \DateTime)) {
+            throw new \Exception('DateTime required.');
+        }
+
+        parent::__construct($value, null);
+    }
+
+    /**
+     * @param string $format
+     */
+    public function setFormat($format)
+    {
+        $this->format = $format;
+    }
+
+    /**
+     * @param mixed $value
+     *
+     * @return bool
+     */
+    public function equals($value)
+    {
+        if ($value instanceof \DateTime) {
+            $timestamp = $value->getTimeStamp();
+        } else {
+            $timestamp = strtotime($value);
+        }
+
+        return ($timestamp == $this->value->getTimeStamp());
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return (string)($this->value->format($this->format));
+    }
+
+    /**
+     * @param string   $content
+     * @param Document $document
+     * @param int      $offset
+     *
+     * @return bool|ElementDate
+     */
+    public static function parse($content, Document $document = null, &$offset = 0)
+    {
+        if (preg_match('/^\s*\(D\:(?P<name>.*?)\)/s', $content, $match)) {
+            $name = $match['name'];
+            $name = str_replace("'", '', $name);
+            $date = false;
+
+            // Smallest format : Y
+            // Full format     : YmdHisP
+            if (preg_match('/^\d{4}(\d{2}(\d{2}(\d{2}(\d{2}(\d{2}(Z(\d{2,4})?|[\+-]?\d{2}(\d{2})?)?)?)?)?)?)?$/', $name)) {
+                if ($pos = strpos($name, 'Z')) {
+                    $name = substr($name, 0, $pos + 1);
+                } elseif (strlen($name) == 18 && preg_match('/[^\+-]0000$/', $name)) {
+                    $name = substr($name, 0, -4) . '+0000';
+                }
+
+                $format = self::$formats[strlen($name)];
+                $date   = \DateTime::createFromFormat($format, $name);
+            } else {
+                // special cases
+                if (preg_match('/^\d{1,2}-\d{1,2}-\d{4},?\s+\d{2}:\d{2}:\d{2}[\+-]\d{4}$/', $name)) {
+                    $name   = str_replace(',', '', $name);
+                    $format = 'n-j-Y H:i:sO';
+                    $date   = \DateTime::createFromFormat($format, $name);
+                }
+            }
+
+            if (!$date) {
+                return false;
+            }
+
+            $offset += strpos($content, '(D:') + strlen($match['name']) + 4; // 1 for '(D:' and ')'
+            $element = new self($date, $document);
+
+            return $element;
+        }
+
+        return false;
+    }
+}