modules/carto/wms-parser.php

<?php

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

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