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- <?php
- /* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
- // +----------------------------------------------------------------------+
- // | PHP version 4 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 2003-2004 TownNews.com |
- // +----------------------------------------------------------------------+
- // | This source file is subject to version 2.0 of the PHP license, |
- // | that is bundled with this package in the file LICENSE, and is |
- // | available at through the world-wide-web at |
- // | http://www.php.net/license/2_02.txt. |
- // | If you did not receive a copy of the PHP license and are unable to |
- // | obtain it through the world-wide-web, please send a note to |
- // | license@php.net so we can mail you a copy immediately. |
- // +----------------------------------------------------------------------+
- // | Authors: Patrick O'Lone <polone@townnews.com> |
- // +----------------------------------------------------------------------+
- //
- // NITF.php,v 1.2 2003/05/29 19:02:08 polone Exp
-
- require_once('XML/Parser.php');
-
- /**
- * Generic NITF Parser class
- *
- * This class provides basic NITF parsing. Many of the major elements of the NITF
- * standard are supported. This implementation is based off the NITF 3.1 DTD,
- * publicly available at the following URL:
- *
- * http://www.nitf.org/site/nitf-documentation/nitf-3-1.dtd
- *
- * Note that not all elements of this standard are not supported.
- *
- * @author Patrick O'Lone <polone@townnews.com>
- * @version 1.2
- * @package XML
- */
- class XML_NITF extends XML_Parser
- {
- /**
- * @var array
- * Document metadata. Container for metadata information about this
- * particular document.
- * @see getDocData()
- * @access private
- */
- var $m_kDocData = array('key-list' => array());
-
- /**
- * @var array
- * Information about specific instance of an item's publication. Contains
- * metadata about how the particular news object was used in a specific
- * instance.
- * @see getPubData()
- * @access private
- */
- var $m_kPubData = array();
-
- /**
- * @var array
- * Information about the creative history of the document; also used as an
- * audit trail. Includes who made changes, when the changes were made, and
- * why. Each element of the array is a key-based array that corresponds to
- * the <revision-history> element.
- * @see getRevision()
- * @access private
- */
- var $m_akRevisions = array();
-
- /**
- * @var array
- * The various headlines that were found in the document. The headlines are
- * keyed by the levels of HLX. The default hedline (if no level is found) is
- * HL1.
- * @see getHedlines()
- * @access private
- */
- var $m_kHedlines = array( 'HL1' => null, 'HL2' => array() );
-
- /**
- * @var string
- * Story abstract summary or synopsis of the contents of the document.
- * @access private
- */
- var $m_sAbstract = null;
-
- /**
- * @var string
- * Significant place mentioned in an article. Used to normalize locations.
- * The location in this variable is the place where the story's events will
- * or have unfolded.
- * @access private
- */
- var $m_sLocation = null;
-
- /**
- * @var string
- * Information distributor. May or may not be the owner or creator.
- * @access private
- */
- var $m_sDistributor = null;
-
- /**
- * @var string
- * The elements of the byline, including the author's name and title.
- * @see getByline()
- * @access private
- */
- var $m_kByline = array( 'author' => null, 'title' => null );
-
- /**
- * @var array
- * An array of paragraphs extracted from the document
- * @see getLede(), getContent()
- * @access private
- */
- var $m_aContent = array();
-
- /**
- * @var array
- * A list of media reference elements as found in the body section of the
- * document. Each element is an array itself with keyed properties related
- * to media element in question.
- * @see getMedia()
- * @access private
- */
- var $m_aMedia = array();
-
- /**
- * @var array
- * A list of tags that were parsed (in order) denoting the current sequence
- * of tags that were parsed. This is array is used for parsing the document
- * elements in a particular order (if needed).
- * @see StartHandler(), EndHandler(), cdataHandler()
- * @access private
- */
- var $m_aParentTags = array();
-
- /**
- * @var string
- * A byline at the end of a story. Example: Stuart Myles contributed to this
- * article.
- * @see getTagline()
- * @access private
- */
- var $m_sTagline = null;
-
- /**
- * @var string
- * Free-form bibliographic data. Used to elaborate on the source of
- * information.
- * @see getBibliography()
- * @access private
- */
- var $m_sBibliography = null;
-
- /**
- * Access all or specific elements of the <docdata> block
- *
- * @return mixed
- * All of the elements from the <docdata> block will be returned if a specific
- * property is not provided. If a specific property is requested and is found
- * in the docdata block, then that property will be returned. If the property
- * cannot be found, null is returned.
- *
- * @param string
- * The property of the <docdata> block to return, the most common being:
- *
- * "doc-id" - a unique identifier of this document (string)
- * "key-list" - a list of keywords provided with the document (array)
- * "copyright" - the copyright holder (string)
- * "series" - if the document is part of series (string)
- * "urgency" - a number between 1 (urgent) and 8 (not urgent) (integer)
- * "date.issue" - date the document was issued (UNIX timestamp)
- * "date.release" - date the document is publicly available (UNIX timestamp)
- * "date.expires" - date the document is no longer valid (UNIX timestamp)
- *
- * @see getDocDataElement()
- * @access public
- */
- function getDocData( $sProperty = null )
- {
- if (!empty($sProperty)) {
-
- $sProperty = strtolower($sProperty);
- if (isset($this->m_kDocData[$sProperty])) {
-
- return $this->m_kDocData[$sProperty];
-
- }
- return null;
-
- }
- return $this->m_kDocData;
- }
-
- /**
- * Returns all elements or a specific element from the <pubdata> block
- *
- * @return mixed
- * Returns string, numeric, or array values depending on the property being
- * accessed from the <pubdata> block.
- *
- * @access public
- */
- function getPubData( $sProperty = null )
- {
- if (!empty($sProperty)) {
-
- $sProperty = strtolower($sProperty);
- if (isset($this->m_kPubData[$sProperty])) {
-
- return $this->m_kPubData[$sProperty];
-
- }
- return null;
-
- }
-
- return $this->m_kPubData;
- }
-
- /**
- * Get the revision history
- *
- * @return array
- * An array containing key-value arrays. The properties of each array element
- * in this array are:
- *
- * "comment" - Reason for the revision
- * "function" - Job function of individual performing revision
- * "name" - Name of the person who made the revision
- * "norm" - Date of the revision
- *
- * @access public
- */
- function getRevision()
- {
- return $this->m_akRevisions;
- }
-
- /**
- * Retrieve all headlines or a single headline denoted by key
- *
- * @return mixed
- * Returns an array if no specific headline element is requested, or a string
- * if the specific headline element requested exists
- *
- * @param string
- * The key value corresponding to the headline to be retrieved
- *
- * @access public
- */
- function getHeadline( $nLevel = 1 )
- {
- return $this->m_kHedlines["HL$nLevel"];
- }
-
- /**
- * Return information about the author of a document
- *
- * @param string
- * The field of the byline to retrieve.
- *
- * @access public
- */
- function getByline( $sProperty = 'author' )
- {
- $sProperty = strtolower($sProperty);
- if (isset($this->m_kByline[$sProperty])) {
-
- return $this->m_kByline[$sProperty];
-
- }
-
- return null;
- }
-
- /**
- * Query for a list of related media elements
- *
- * @return array
- * Returns an array of all media reference data, or an array of select media
- * reference data determined by the property parameter passed.
- *
- * @param string
- * If supplied, only this property will be returned for each element of the
- * media reference array.
- *
- * @access public
- */
- function getMedia( $sProperty = null )
- {
- if (empty($sProperty)) {
-
- return $this->m_aMedia;
-
- } else {
-
- $aMediaRefs = array();
- foreach($this->m_aMedia as $aMediaElement) {
-
- if (isset($aMediaElem[$sProperty])) {
-
- array_push($aMediaRefs, $aMediaElem[$sProperty]);
-
- }
- }
-
- return $aMediaRefs;
-
- }
- }
-
- /**
- * Returns the lede (sometimes called lead) paragraph
- *
- * @return string
- * Returns the lede paragraph if it is defined, or null otherwise
- *
- * @access public
- */
- function getLede()
- {
- if (isset($this->m_aContent[0])) {
-
- return $this->m_aContent[0];
-
- }
- return null;
- }
-
- /**
- * Returns the paragraphs of content
- *
- * @return array
- * An array of elements that represent a single paragraph each
- *
- * @access public
- */
- function &getContent()
- {
- return $this->m_aContent;
- }
-
- /**
- * Returns the tag line (if one exists)
- *
- * @return string
- * The tag line extracted from the NITF data source
- *
- * @access public
- */
- function getTagline()
- {
- return $this->m_sTagline;
- }
-
- /**
- * Returns the free-form bibliographic data
- *
- * @return string
- * The bibliography (if one exists) is returned
- *
- * @access public
- */
- function getBibliography()
- {
- return $this->m_sBibliography;
- }
-
- /**
- * Get a string version of the article
- *
- * @return string
- * A string representing the main headline, author, content, and tagline.
- *
- * @param string
- * The character(s) used to separate each article element in the string that
- * is returned - often referred to as the CRLF.
- *
- * @access public
- */
- function &toString( $sCRLF = "\n" )
- {
- $sArticle = "{$this->m_kHedlines['HL1']}$sCRLF";
-
- if (!empty($this->m_kByline['author'])) {
-
- $sArticle .= "{$this->m_kByline['author']}$sCRLF";
-
- }
-
- if (!empty($this->m_sLocation)) {
-
- $sArticle .= "{$this->m_sLocation} - ";
-
- }
-
- $sArticle .= join($sCRLF, $this->m_aContent);
-
- if (!empty($this->m_sTagline)) {
-
- $sArticle .= "$sCRLF{$this->m_sTagline}";
-
- }
-
- return $sArticle;
- }
-
- /**
- * Handle start XML elements and attributes
- *
- * When a new element is begun, this handler is executed.
- *
- * @param object
- * The XML parser object instance that was inherited from the XML_Parser
- * class
- *
- * @param string
- * A tag element from the XML data stream
- *
- * @param array
- * An array of XML attributes associated with the given tag supplied
- *
- * @access private
- */
- function StartHandler($oParser, $sName, $kAttrib )
- {
- // Push the element into the stack of XML elements already visited
-
- array_push($this->m_aParentTags, $sName);
-
- // Handle the attributes of the XML tags
-
- switch ($sName) {
-
- case 'HL2':
- $this->_sHedline = null;
- break;
-
- case 'P':
- if (!empty($kAttrib['LEDE']) && ($kAttrib['LEDE'] == 'true')) {
-
- $this->_bIsLede = true;
-
- }
- $this->_sContent = null;
- break;
-
- case 'DOC.COPYRIGHT':
- $this->m_sCopyright = $kAttrib['HOLDER'];
- break;
-
- case 'MEDIA':
- $this->_kMedia = array();
- if (!empty($kAttrib['MEDIA-TYPE'])) {
-
- $this->_kMedia['type'] = $kAttrib['MEDIA-TYPE'];
-
- } else {
-
- $this->_kMedia['type'] = 'other';
-
- }
-
- $this->_kMedia['source'] = null;
- $this->_kMedia['mime-type'] = null;
- $this->_kMedia['caption'] = null;
- $this->_kMedia['data'] = null;
- $this->_kMedia['encoding'] = null;
- $this->_kMedia['producer'] = null;
- $this->_kMedia['meta'] = array();
- break;
-
- case 'MEDIA-REFERENCE':
- if (!empty($kAttrib['SOURCE'])) {
-
- $this->_kMedia['source'] = $kAttrib['SOURCE'];
-
- // Compatibility with the AP Usenet feed - note that this is a non
- // standard attribute and is NOT a part of NITF standards
-
- } elseif (!empty($kAttrib['DATA-LOCATION'])) {
-
- $this->_kMedia['source'] = $kAttrib['DATA-LOCATION'];
-
- }
-
- $this->_kMedia['mime-type'] = $kAttrib['MIME-TYPE'];
- break;
-
- case 'MEDIA-OBJECT':
- $this->_kMedia['encoding'] = $kAttrib['ENCODING'];
- break;
-
- case 'MEDIA-METADATA':
- if (!empty($kAttrib['NAME'])) {
-
- $this->_kMedia[$kAttrib['NAME']] = $kAttrib['VALUE'];
-
- }
- break;
-
- case 'PUBDATA':
- foreach ($kAttrib as $sKey => $sValue) {
-
- $this->m_kPubData[strtolower($sKey)] = $sValue;
-
- }
- break;
-
- case 'DOC-ID':
- $this->m_kDocData['doc-id'] = $kAttrib['ID-STRING'];
- break;
-
- // The list of keywords or phrases are just added to the array of
- // keywords.
-
- case 'KEYWORD':
- if (empty($this->m_kDocData['key-list'])) {
-
- $this->m_kDocData['key-list'] = array();
-
- }
-
- array_push($this->m_kDocData['key-list'], $kAttrib['KEY']);
- break;
-
- // The release, expiration, and issuing dates of this article. The
- // ISO-8601 time stamp settings are preserved, but you can use the
- // magic function strtotime() to convert these to time stamp values.
-
- case 'DATE.RELEASE':
- case 'DATE.EXPIRE':
- case 'DATE.ISSUE':
- if (!empty($kAttrib['NORM'])) {
-
- $sName = strtolower($sName);
- $this->m_kDocData[$sName] = $kAttrib['NORM'];
-
- }
- break;
-
- case 'REVISION-HISTORY':
- array_push($this->m_akRevisions, array_change_key_case($kAttrib, CASE_LOWER));
- break;
-
- }
-
- }
-
- /**
- * Called when a tag element ends
- *
- * @param object
- * The parser object parsing the XML data
- *
- * @param string
- * The name of the tag element that has just ended
- *
- * @access private
- */
- function EndHandler( $oParser, $sName )
- {
- switch ( $sName ) {
-
- case 'HL1':
- $this->m_kHedlines['HL1'] = trim($this->m_kHedlines['HL1']);
- break;
-
- case 'HL2':
- array_push($this->m_kHedlines['HL2'], trim($this->_sHedline));
- unset($this->_sHedline);
- break;
-
- case 'P':
- if (isset($this->_bIsLede)) {
-
- array_unshift($this->m_aContent, trim($this->_sContent));
- unset($this->_bIsLede);
-
- } else {
-
- array_push($this->m_aContent, trim($this->_sContent));
-
- }
- unset($this->_sContent);
- break;
-
- case 'MEDIA':
- array_push($this->m_aMedia, $this->_kMedia);
- unset($this->_kMedia);
- break;
-
- }
-
- array_pop($this->m_aParentTags);
- }
-
- /**
- * Handles CDATA sections from the XML document during processing
- *
- * @param object
- * The XML parser instance inherited from the XML_Parser class
- *
- * @param string
- * The data chunk to be processed from the parser
- *
- * @access private
- */
- function cdataHandler( $oParser, $sData )
- {
- if (!in_array('MEDIA-OBJECT', $this->m_aParentTags)) {
-
- $sData = preg_replace('#\s+#', ' ', $sData);
-
- }
-
- // Elements that can be found in the BODY.HEAD section of the NITF
- // document are defined in this handler.
-
- if (in_array('BODY.HEAD', $this->m_aParentTags)) {
-
- // We don't care if they use other attribute items, we just want the
- // textual version of the byline. Other attributes are appended to
- // the byline data.
-
- if (in_array('BYLINE', $this->m_aParentTags)) {
-
- if (in_array('BYTTL', $this->m_aParentTags)) {
-
- $this->m_kByline['title'] .= $sData;
- return;
-
- }
-
- $this->m_kByline['author'] .= $sData;
- return;
-
- }
-
- // Generally, the distributor is the same as the company supplying
- // the content. However, this is not always the case (the AP, for
- // example).
-
- if (in_array('DISTRIBUTOR', $this->m_aParentTags)) {
-
- $this->m_sDistributor .= $sData;
- return;
-
- }
-
- // The location where the story pertains too.
-
- if (in_array('DATELINE', $this->m_aParentTags)) {
-
- if (in_array('LOCATION', $this->m_aParentTags)) {
-
- $this->m_sLocation .= $sData;
-
- }
- return;
- }
-
- // There are only two possibilities for hedlines, the main headline
- // or a subheadline.
-
- if (in_array('HEDLINE', $this->m_aParentTags)) {
-
- if (in_array('HL2', $this->m_aParentTags)) {
-
- $this->_sHedline .= $sData;
-
- } else {
-
- $this->m_kHedlines['HL1'] .= $sData;
-
- }
-
- }
- return;
-
- }
-
- // The article content, including the lead and following paragraphs, can
- // be found in this section of the XML document.
-
- if (in_array('BODY.CONTENT', $this->m_aParentTags)) {
-
- if (in_array('MEDIA', $this->m_aParentTags)) {
-
- // The media caption for the currently selected media element.
-
- if (in_array('MEDIA-CAPTION', $this->m_aParentTags)) {
-
- $this->_kMedia['caption'] .= $sData;
- return;
-
- }
-
- if (in_array('MEDIA-OBJECT', $this->m_aParentTags)) {
-
- $this->_kMedia['data'] .= $sData;
- return;
-
- }
-
- }
-
- // A paragraph element was found.
-
- if (in_array('P', $this->m_aParentTags)) {
-
- $this->_sContent .= $sData;
- return;
-
- }
-
- }
-
- // The <body.end> tag has two primary elements, <taglines> and the free
- // form <bibliography> tags.
-
- if (in_array('BODY.END', $this->m_aParentTags)) {
-
- if (in_array('TAGLINE', $this->m_aParentTags)) {
-
- $this->m_sTagline .= $sData;
- return;
-
- }
-
- if (in_array('BIBLIOGRAPHY', $this->m_aParentTags)) {
-
-
- $this->m_sBibliography .= $sData;
-
- }
-
- }
-
- }
-
- }
-
- ?>
-