modules/carto/wms-parser.php

<?php
// $Id$

// CubeWerx requires at least 10M for wms capabilities
ini_set( 'memory_limit', '20M' );

/**
 *
 * inherited: +style, +crs, =latlonboundingbox, =boundingbox, +authorityurl
 *   =dimension, =attribution, =min/maxscaledenominator, =queryable, =cascaded
 *   =opaque
 * attribution: title, onlineresource->xlink:href, logourl(format,onlineresource)
 * style: name, title, legendurl(format,onlineresource->xlink:href)
 */
class CapabilitiesParser
{
    var $parser;

    var $version = NULL; // wms version
    var $root = NULL; // root element name (depends on wms version)
    var $path = ''; // current path (excluding root)

    var $layers = array();
    var $layer_level = 0;
    var $layer_props;
    var $inAttribution = false;
    var $inStyle = false;

    var $element = ''; // current element
    var $cbLayer = NULL;
    var $cbLayerParams = NULL;
    var $numLayers = 0;
    
    function CapabilitiesParser( )
    {
        $this->parser = xml_parser_create( "UTF-8" );
        xml_parser_set_option( $this->parser, XML_OPTION_CASE_FOLDING, 0 );
        xml_set_element_handler( $this->parser, array(&$this,"_startElement"), array(&$this,"_endElement") );
        xml_set_character_data_handler( $this->parser, array(&$this,"_characterData") );
        $this->layer_level = 0;
        $this->layer_props = array();
        $this->layer_props[ $this->layer_level ] = array( );
        $this->layers = array( );
    }
    
    function free_parser( )
    {
        xml_parser_free( $this->parser );
    }
    
    function inSomething()
    {
        return $this->inAttribution || $this->inStyle !== false;
    }
    
    function parse( $capabilities, $cbLayer = NULL, $cbLayerParams = NULL )
    {
        $this->cbLayer = $cbLayer;
        $this->cbLayerParams = $cbLayerParams;
        return xml_parse( $this->parser, $capabilities, TRUE );
    }
    
    function _startElement( $parser, $name, $attrs )
    {
//print '_startElement ' . $name . "\n";
        if( ! $this->root )
        {
            $this->root = $name;
            $this->version = $attrs['version'];
            $this->layer_props[ $this->layer_level ]['wms_version'] = $this->version;
        }
        else
        {
            $this->path .= '/' . $name;
        }
        $this->element = $name;
        
        switch( $name )
        {
            case 'Attribution':
                $this->inAttribution = true;
                break;
            case 'Style':
                $this->inStyle = true;
//                $this->layer_props[ $this->layer_level ]['Style'] = array( );
                break;
            case 'OnlineResource':
                if( $this->inStyle !== false )
                {
                    $this->layer_props[ $this->layer_level ]['Style'][ $this->inStyle ] = $attrs['xlink:href'];
                }
                break;
            case 'Layer':
                // the previous layer is a parent layer of the new one
                if( ! isset($this->layer_props[ $this->layer_level ]['layer_id']) )
                {
                    $this->layer_props[ $this->layer_level ]['layer_id'] = $this->numLayers++;
                    if( $this->cbLayer )
                        eval( $this->cbLayer . "(\$this->layer_props[\$this->layer_level], \$this->cbLayerParams );" );
                    else
                    {
//                    print $this->layer_level . ' : ' . var_export($this->layer_props[ $this->layer_level ],true) . '<br>';
                        $this->layers[] = $this->layer_props[ $this->layer_level ];
                    }
                }
                else
                {
                    // adjust layer of $this->layer_props[ $this->layer_level ]
                    // count child layers?
                }
                $this->layer_level += 1;
                // copy layer_props for new layer level and merge new attrs
                // @todo: merge only inherited props!
                $inherited_values = array();
                $inherited_properties = array( 'Style', 'SRS', 'LatLonBoundingBox', 'BoundingBox', 'queryable', 'opaque', 'cascaded' );
                foreach( $inherited_properties as $prop )
                {
                    if( isset($this->layer_props[ $this->layer_level - 1 ][$prop]) )
                        $inherited_values[$prop] = $this->layer_props[ $this->layer_level - 1 ][$prop];
                }
                $this->layer_props[ $this->layer_level ] = array_merge( $inherited_values, $attrs );
                
//                print var_export( array($name,$attrs,$this->layer_level), true ) . '<br>';
                break;
            case 'LatLonBoundingBox';
                if( $this->layer_level > 0 )
                    $this->layer_props[ $this->layer_level][ $name ] = $attrs;
                break;
            case 'BoundingBox':
                if( $this->layer_level > 0 )
                {
                    if( ! isset($this->layer_props[ $this->layer_level][ $name ]) )
                        $this->layer_props[ $this->layer_level][ $name ] = array();
                    $SRS = $attrs['SRS'];
                    unset( $attrs['SRS'] );
                    $this->layer_props[ $this->layer_level][ $name ][$SRS] = $attrs;
                }
                break;
            default:
//                print $this->path . ':' . var_export($attrs,true) . '<br>';
                break;
        }
//        print $this->path . ': attrs = ' . var_export($attrs,true) . '<br>';
    }
    
    function _characterData( $parser, $data )
    {
//print '_characterData ' . $this->element . ':' . $data . "\n";
        if( $this->element != '' )
        {
            $text = trim($data);
            if( $this->layer_level == 0 )
            {
                switch( $this->element )
                {
                    case 'Title':
                    case 'Name':
                    case 'Abstract':
    //print 'abstract=' . $test . '<br/>';
                        $this->layer_props[ $this->layer_level][ $this->element ] .= $text;
                        break;
                }
            }
            if( $this->layer_level > 0 && ! $this->inSomething() )
            {
                switch( $this->element )
                {
                    case 'Title':
                    case 'Name':
                        // if not a style name!!
                        $this->layer_props[ $this->layer_level][ $this->element ] .= $text;
                        break;
                    case 'Abstract':
    //print 'abstract=' . $test . '<br/>';
                        // if not a style name!!
                        $this->layer_props[ $this->layer_level][ $this->element ] .= $text;
                        break;
                    case 'SRS':
                        if( isset($this->layer_props[ $this->layer_level][ $this->element ]) 
                        && $this->layer_props[ $this->layer_level][ $this->element ] != '' )
                        {
                            $this->layer_props[ $this->layer_level][ $this->element ] .= ' ';
                        }
                        $this->layer_props[ $this->layer_level][ $this->element ] .= $text;
                        break;
                }
            }
            else if( $this->inStyle !== false )
            {
                switch( $this->element )
                {
                    case 'Name':
                        $this->inStyle .= $text;
                        break;
                }
            }
//            print $this->path . ':<b>' . $this->element . '=' . $text . '|</b><br>';
//            print '---> ' . $this->layer_level . '/' . var_export($this->layer_props[ $this->layer_level],true) . '<br>';
            
            //$this->element = ''; // previously here instead of at start of _endElement
        }
    }
    
    function _endElement( $parser, $name )
    {
//print '_endElement ' . $name . "\n";
        $this->element = ''; // instead of at end of _characterData function
        
        $this->path = substr( $this->path, 0, -(1+strlen($name)) );
        switch( $name )
        {
            case 'Layer':
                if( ! $this->layer_props[ $this->layer_level ]['layer_id'] )
                {
                    $this->layer_props[ $this->layer_level ]['layer_id'] = $this->numLayers++;
                    if( $this->cbLayer )
                        eval( $this->cbLayer . "(\$this->layer_props[\$this->layer_level], \$this->cbLayerParams );" );
                    else
                    {
//                    print $this->layer_level . ' : ' . var_export($this->layer_props[ $this->layer_level ],true) . '<br>';
                        $this->layers[] = $this->layer_props[ $this->layer_level ];
                    }
                }
                $this->layer_level -= 1;
                array_pop( $this->layer_props );
                break;
            case 'Attribution':
                $this->inAttribution = false;
                break;
            case 'Style':
                $this->inStyle = false;
                break;
            default:
                break;
        }
    }
    
} // CapabilitiesParser

?>
1	openwereld	1.1	<?php
2	openwereld	1.2	// $Id$
3	openwereld	1.1
4			// CubeWerx requires at least 10M for wms capabilities
5	openwereld	1.2	ini_set( 'memory_limit', '20M' );
6	openwereld	1.1
7			/**
8			*
9			* inherited: +style, +crs, =latlonboundingbox, =boundingbox, +authorityurl
10			* =dimension, =attribution, =min/maxscaledenominator, =queryable, =cascaded
11			* =opaque
12			* attribution: title, onlineresource->xlink:href, logourl(format,onlineresource)
13			* style: name, title, legendurl(format,onlineresource->xlink:href)
14			*/
15			class CapabilitiesParser
16			{
17			var $parser;
18
19			var $version = NULL; // wms version
20			var $root = NULL; // root element name (depends on wms version)
21			var $path = ''; // current path (excluding root)
22
23			var $layers = array();
24			var $layer_level = 0;
25			var $layer_props;
26			var $inAttribution = false;
27			var $inStyle = false;
28
29			var $element = ''; // current element
30			var $cbLayer = NULL;
31			var $cbLayerParams = NULL;
32			var $numLayers = 0;
33
34			function CapabilitiesParser( )
35			{
36	openwereld	1.2	$this->parser = xml_parser_create( "UTF-8" );
37	openwereld	1.1	xml_parser_set_option( $this->parser, XML_OPTION_CASE_FOLDING, 0 );
38			xml_set_element_handler( $this->parser, array(&$this,"_startElement"), array(&$this,"_endElement") );
39			xml_set_character_data_handler( $this->parser, array(&$this,"_characterData") );
40			$this->layer_level = 0;
41			$this->layer_props = array();
42			$this->layer_props[ $this->layer_level ] = array( );
43			$this->layers = array( );
44			}
45
46			function free_parser( )
47			{
48			xml_parser_free( $this->parser );
49			}
50
51			function inSomething()
52			{
53			return $this->inAttribution \|\| $this->inStyle !== false;
54			}
55
56			function parse( $capabilities, $cbLayer = NULL, $cbLayerParams = NULL )
57			{
58			$this->cbLayer = $cbLayer;
59			$this->cbLayerParams = $cbLayerParams;
60			return xml_parse( $this->parser, $capabilities, TRUE );
61			}
62
63			function _startElement( $parser, $name, $attrs )
64			{
65	openwereld	1.2	//print '_startElement ' . $name . "\n";
66	openwereld	1.1	if( ! $this->root )
67			{
68			$this->root = $name;
69			$this->version = $attrs['version'];
70	openwereld	1.2	$this->layer_props[ $this->layer_level ]['wms_version'] = $this->version;
71	openwereld	1.1	}
72			else
73			{
74			$this->path .= '/' . $name;
75			}
76			$this->element = $name;
77
78			switch( $name )
79			{
80			case 'Attribution':
81			$this->inAttribution = true;
82			break;
83			case 'Style':
84			$this->inStyle = true;
85			// $this->layer_props[ $this->layer_level ]['Style'] = array( );
86			break;
87			case 'OnlineResource':
88			if( $this->inStyle !== false )
89			{
90			$this->layer_props[ $this->layer_level ]['Style'][ $this->inStyle ] = $attrs['xlink:href'];
91			}
92			break;
93			case 'Layer':
94			// the previous layer is a parent layer of the new one
95			if( ! isset($this->layer_props[ $this->layer_level ]['layer_id']) )
96			{
97			$this->layer_props[ $this->layer_level ]['layer_id'] = $this->numLayers++;
98			if( $this->cbLayer )
99			eval( $this->cbLayer . "(\$this->layer_props[\$this->layer_level], \$this->cbLayerParams );" );
100			else
101			{
102			// print $this->layer_level . ' : ' . var_export($this->layer_props[ $this->layer_level ],true) . '<br>';
103			$this->layers[] = $this->layer_props[ $this->layer_level ];
104			}
105			}
106			else
107			{
108			// adjust layer of $this->layer_props[ $this->layer_level ]
109			// count child layers?
110			}
111			$this->layer_level += 1;
112			// copy layer_props for new layer level and merge new attrs
113			// @todo: merge only inherited props!
114			$inherited_values = array();
115			$inherited_properties = array( 'Style', 'SRS', 'LatLonBoundingBox', 'BoundingBox', 'queryable', 'opaque', 'cascaded' );
116			foreach( $inherited_properties as $prop )
117			{
118			if( isset($this->layer_props[ $this->layer_level - 1 ][$prop]) )
119			$inherited_values[$prop] = $this->layer_props[ $this->layer_level - 1 ][$prop];
120			}
121			$this->layer_props[ $this->layer_level ] = array_merge( $inherited_values, $attrs );
122
123			// print var_export( array($name,$attrs,$this->layer_level), true ) . '<br>';
124			break;
125			case 'LatLonBoundingBox';
126			if( $this->layer_level > 0 )
127			$this->layer_props[ $this->layer_level][ $name ] = $attrs;
128			break;
129			case 'BoundingBox':
130			if( $this->layer_level > 0 )
131			{
132			if( ! isset($this->layer_props[ $this->layer_level][ $name ]) )
133			$this->layer_props[ $this->layer_level][ $name ] = array();
134			$SRS = $attrs['SRS'];
135			unset( $attrs['SRS'] );
136			$this->layer_props[ $this->layer_level][ $name ][$SRS] = $attrs;
137			}
138			break;
139			default:
140			// print $this->path . ':' . var_export($attrs,true) . '<br>';
141			break;
142			}
143			// print $this->path . ': attrs = ' . var_export($attrs,true) . '<br>';
144			}
145
146			function _characterData( $parser, $data )
147			{
148	openwereld	1.2	//print '_characterData ' . $this->element . ':' . $data . "\n";
149	openwereld	1.1	if( $this->element != '' )
150			{
151			$text = trim($data);
152	openwereld	1.2	if( $this->layer_level == 0 )
153			{
154			switch( $this->element )
155			{
156			case 'Title':
157			case 'Name':
158			case 'Abstract':
159			//print 'abstract=' . $test . '<br/>';
160			$this->layer_props[ $this->layer_level][ $this->element ] .= $text;
161			break;
162			}
163			}
164	openwereld	1.1	if( $this->layer_level > 0 && ! $this->inSomething() )
165			{
166			switch( $this->element )
167			{
168			case 'Title':
169			case 'Name':
170	openwereld	1.2	// if not a style name!!
171			$this->layer_props[ $this->layer_level][ $this->element ] .= $text;
172			break;
173	openwereld	1.1	case 'Abstract':
174	openwereld	1.2	//print 'abstract=' . $test . '<br/>';
175	openwereld	1.1	// if not a style name!!
176	openwereld	1.2	$this->layer_props[ $this->layer_level][ $this->element ] .= $text;
177	openwereld	1.1	break;
178			case 'SRS':
179			if( isset($this->layer_props[ $this->layer_level][ $this->element ])
180			&& $this->layer_props[ $this->layer_level][ $this->element ] != '' )
181			{
182			$this->layer_props[ $this->layer_level][ $this->element ] .= ' ';
183			}
184			$this->layer_props[ $this->layer_level][ $this->element ] .= $text;
185			break;
186			}
187			}
188			else if( $this->inStyle !== false )
189			{
190			switch( $this->element )
191			{
192			case 'Name':
193	openwereld	1.2	$this->inStyle .= $text;
194	openwereld	1.1	break;
195			}
196			}
197			// print $this->path . ':<b>' . $this->element . '=' . $text . '\|</b><br>';
198			// print '---> ' . $this->layer_level . '/' . var_export($this->layer_props[ $this->layer_level],true) . '<br>';
199	openwereld	1.2
200			//$this->element = ''; // previously here instead of at start of _endElement
201	openwereld	1.1	}
202			}
203
204			function _endElement( $parser, $name )
205			{
206	openwereld	1.2	//print '_endElement ' . $name . "\n";
207			$this->element = ''; // instead of at end of _characterData function
208
209	openwereld	1.1	$this->path = substr( $this->path, 0, -(1+strlen($name)) );
210			switch( $name )
211			{
212			case 'Layer':
213			if( ! $this->layer_props[ $this->layer_level ]['layer_id'] )
214			{
215			$this->layer_props[ $this->layer_level ]['layer_id'] = $this->numLayers++;
216			if( $this->cbLayer )
217			eval( $this->cbLayer . "(\$this->layer_props[\$this->layer_level], \$this->cbLayerParams );" );
218			else
219			{
220			// print $this->layer_level . ' : ' . var_export($this->layer_props[ $this->layer_level ],true) . '<br>';
221			$this->layers[] = $this->layer_props[ $this->layer_level ];
222			}
223			}
224			$this->layer_level -= 1;
225			array_pop( $this->layer_props );
226			break;
227			case 'Attribution':
228			$this->inAttribution = false;
229			break;
230			case 'Style':
231			$this->inStyle = false;
232			break;
233			default:
234			break;
235			}
236			}
237
238			} // CapabilitiesParser
239
240			?>