photoshop_file_info.php

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<?php

/******************************************************************************
*
* Filename:     Photoshop_File_Info.php
*
* Description:  Provides functions that mimic the way Photoshop reads and writes
*               metadata in it's 'File Info' dialog
*
* Author:       Evan Hunter
*
* Date:         11/11/2004
*
* Project:      JPEG Metadata
*
* Revision:     1.11
* Changes:      1.10 -> 1.11 : Changed displayed toolkit version numbers to reference Toolkit_Version.php
*
* URL:          http://electronics.ozhiker.com
*
* License:      This file is part of the PHP JPEG Metadata Toolkit.
*
*               The PHP JPEG Metadata Toolkit is free software; you can
*               redistribute it and/or modify it under the terms of the
*               GNU General Public License as published by the Free Software
*               Foundation; either version 2 of the License, or (at your
*               option) any later version.
*
*               The PHP JPEG Metadata Toolkit 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 General Public License
*               for more details.
*
*               You should have received a copy of the GNU General Public
*               License along with the PHP JPEG Metadata Toolkit; if not,
*               write to the Free Software Foundation, Inc., 59 Temple
*               Place, Suite 330, Boston, MA  02111-1307  USA
*
*               If you require a different license for commercial or other
*               purposes, please contact the author: [e-mail]
*
******************************************************************************/

// TODO: XMP sections: XAPMM, TIFF, EXIF


include 'Toolkit_Version.php';          // Change: added as of version 1.11


/******************************************************************************
* Global Variable:      Software Name
*
* Contents:     The string that is appended to fields which store the name of
*               the software editor.
*
******************************************************************************/

$GLOBALS[ "Software Name" ] = "(PHP JPEG Metadata Toolkit v" . $GLOBALS['Toolkit_Version'] . ")";          // Change:  Changed version numbers to reference Toolkit_Version.php - as of version 1.11

/******************************************************************************
* End of Global Variable:     Software Name
******************************************************************************/






/******************************************************************************
*
* Function:     get_photoshop_file_info
*
* Description:  Retrieves Photoshop 'File Info' metadata in the same way that Photoshop
*               does. The results are returned in an array as below:
*
*               $file_info_array = array(
*                       "title"                  => "",
*                       "author"                 => "",
*                       "authorsposition"        => "",      // Note: Not used in Photoshop 7 or higher
*                       "caption"                => "",
*                       "captionwriter"          => "",
*                       "jobname"                => "",      // Note: Not used in Photoshop CS
*                       "copyrightstatus"        => "",
*                       "copyrightnotice"        => "",
*                       "ownerurl"               => "",
*                       "keywords"               => array( 0 => "", 1 => "", ... ),
*                       "category"               => "",     // Note: Max 3 characters
*                       "supplementalcategories" => array( 0 => "", 1 => "", ... ),
*                       "date"                   => "",     // Note: DATE MUST BE IN YYYY-MM-DD format
*                       "city"                   => "",
*                       "state"                  => "",
*                       "country"                => "",
*                       "credit"                 => "",
*                       "source"                 => "",
*                       "headline"               => "",
*                       "instructions"           => "",
*                       "transmissionreference"  => "",
*                       "urgency"                => "" );
*
* Parameters:   Exif_array - an array containing the EXIF information to be
*                            searched, as retrieved by get_EXIF_JPEG. (saves having to parse the EXIF again)
*               XMP_array - an array containing the XMP information to be
*                           searched, as retrieved by read_XMP_array_from_text. (saves having to parse the XMP again)
*               IRB_array - an array containing the Photoshop IRB information
*                           to be searched, as retrieved by get_Photoshop_IRB. (saves having to parse the IRB again)
*
* Returns:      outputarray - an array as above, containing the Photoshop File Info data
*
******************************************************************************/

function get_photoshop_file_info( $Exif_array, $XMP_array, $IRB_array )
{

        // Create a blank array to receive the output
        $outputarray = array(
                "title" => "",
                "author" => "",
                "authorsposition" => "",
                "caption" => "",
                "captionwriter" => "",
                "jobname" => "",
                "copyrightstatus" => "",
                "copyrightnotice" => "",
                "ownerurl" => "",
                "keywords" => array(),
                "category" => "",
                "supplementalcategories" => array(),
                "date" => "",
                "city" => "",
                "state" => "",
                "country" => "",
                "credit" => "",
                "source" => "",
                "headline" => "",
                "instructions" => "",
                "transmissionreference" => "",
                "urgency" => "" );


        /***************************************/

        // XMP Processing


        // Retrieve the dublin core section from the XMP header

        // Extract the Dublin Core section from the XMP
        $dublincore_block = find_XMP_block( $XMP_array, "dc" );

        // Check that the Dublin Core section exists
        if ( $dublincore_block != FALSE )
        {
                // Dublin Core Description Field contains caption
                // Extract Description
                $Item = find_XMP_item( $dublincore_block, "dc:description" );

                // Check if Description Tag existed
                if ( $Item != FALSE )
                {
                        // Ensure that the Description value exists and save it.
                        if  ( ( array_key_exists( 'children', $Item ) ) &&
                              ( $Item['children'][0]['tag'] == "rdf:Alt" ) &&
                              ( array_key_exists( 'value', $Item['children'][0]['children'][0] ) ) )
                        {
                                $outputarray = add_to_field( $outputarray, 'caption' , HTML_UTF8_Escape( $Item['children'][0]['children'][0]['value'] ), "\n" );
                        }
                }

                /***************************************/

                // Dublin Core Creator Field contains author
                // Extract Description
                $Item = find_XMP_item( $dublincore_block, "dc:creator" );

                // Check if Creator Tag existed
                if ( $Item != FALSE )
                {
                        // Ensure that the Creator value exists and save it.
                        if  ( ( array_key_exists( 'children', $Item ) ) &&
                              ( $Item['children'][0]['tag'] =="rdf:Seq" ) &&
                              ( array_key_exists( 'value', $Item['children'][0]['children'][0] ) ) )
                        {
                                $outputarray = add_to_field( $outputarray, 'author' , HTML_UTF8_Escape( $Item['children'][0]['children'][0]['value'] ), "\n" );
                        }
                }

                /***************************************/

                // Dublin Core Title Field contains title
                // Extract Title
                $Item = find_XMP_item( $dublincore_block, "dc:title" );

                // Check if Title Tag existed
                if ( $Item != FALSE )
                {
                        // Ensure that the Title value exists and save it.
                        if  ( ( array_key_exists( 'children', $Item ) ) &&
                              ( $Item['children'][0]['tag'] =="rdf:Alt" ) &&
                              ( array_key_exists( 'value', $Item['children'][0]['children'][0] ) ) )
                        {

                                $outputarray = add_to_field( $outputarray, 'title' , HTML_UTF8_Escape( $Item['children'][0]['children'][0]['value'] ), "," );
                        }
                }

                /***************************************/

                // Dublin Core Rights Field contains copyrightnotice
                // Extract Rights
                $Item = find_XMP_item( $dublincore_block, "dc:rights" );

                // Check if Rights Tag existed
                if ( $Item != FALSE )
                {
                        // Ensure that the Rights value exists and save it.
                        if  ( ( array_key_exists( 'children', $Item ) ) &&
                              ( $Item['children'][0]['tag'] =="rdf:Alt" ) &&
                              ( array_key_exists( 'value', $Item['children'][0]['children'][0] ) ) )
                        {

                                $outputarray = add_to_field( $outputarray, 'copyrightnotice' , HTML_UTF8_Escape( $Item['children'][0]['children'][0]['value'] ), "," );
                        }
                }

                /***************************************/

                // Dublin Core Subject Field contains keywords
                // Extract Subject
                $Item = find_XMP_item( $dublincore_block, "dc:subject" );

                // Check if Subject Tag existed
                if ( $Item != FALSE )
                {
                        // Ensure that the Subject values exist
                        if  ( ( array_key_exists( 'children', $Item ) ) && ( $Item['children'][0]['tag'] =="rdf:Bag" ) )
                        {
                                // Cycle through each Subject value and save them
                                foreach ( $Item['children'][0]['children'] as $keywords )
                                {
                                        if ( ! in_array ( HTML_UTF8_Escape( $keywords['value'] ), $outputarray['keywords']))
                                        {
                                                if  ( array_key_exists( 'value', $keywords ) )
                                                {
                                                        $outputarray['keywords'][] = HTML_UTF8_Escape( $keywords['value'] );
                                                }
                                        }
                                }
                        }
                }


        }

        /***************************************/

        // Find the Photoshop Information within the XMP block
        $photoshop_block = find_XMP_block( $XMP_array, "photoshop" );

        // Check that the Photoshop Information exists
        if ( $photoshop_block != FALSE )
        {
                // The Photoshop CaptionWriter tag contains captionwriter - Find it
                $Item = find_XMP_item( $photoshop_block, "photoshop:CaptionWriter" );

                // Check that the CaptionWriter Field exists and save the value
                if ( ( $Item != FALSE ) && ( array_key_exists( 'value', $Item ) ) )