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<?php

/* sample usage:
$tree = new xmlTreeParser('sample.xml');
echo '<pre>';
print_r($tree->getTree());
*/

class xmlTreeParser {

    var $_parser;
    var $_xmldata;
    var $_obj;
    var $_xmltree;
    var $_encoding;

    function xmlTreeParser($filename='',$data='',$encoding = '')
    {
        $this->_init();
        if ($filename)
            $this->xmlFromFile($filename);
        else if ($data)
            $this->xmlFromData($data);
        $this->_encoding = $encoding;    
    }
    
    function _init()
    {
        $this->_parser = xml_parser_create($this->_encoding);
        $this->_obj->tree = '$this->_obj->xml';
        $this->_obj->xml = '';
        
        xml_set_object($this->_parser, $this);
        xml_set_element_handler($this->_parser, "startElement", "endElement");
        xml_set_character_data_handler($this->_parser, "characterData");
        xml_parser_set_option($this->_parser, XML_OPTION_CASE_FOLDING, false);
    }
    
    function xmlFromFile($filename)
    {
        $this->_xmldata = implode('',file($filename));
        return $this->_parse();
    }
    
    function xmlFromData($data)
    {
        $this->_xmldata = $data;
        return $this->_parse();
    }
    
    function _parse()
    {
        xml_parse($this->_parser, $this->_xmldata);
    
        $this->_xmltree = $this->_flatten($this->_obj->xml);
    
        // reset for next run
        xml_parser_free($this->_parser);
        $this->_init();
    
        return $this->_xmltree;
    }
    
    function _flatten($tree)
    {
        if (is_object($tree))
            $vars = array_keys(get_object_vars($tree));
        else if (is_array($tree))
            $vars = array_keys($tree);
        else
            $vars = Array();
    
        $ct = count($vars);
    
        if ($ct == 1 && $vars[0] == 'data')
            return $tree->data;
    
        foreach ($vars as $key) {
            if (is_object($tree))
            $tree->{$key} = $this->_flatten($tree->{$key});
            else if (is_array($tree))
            $tree[$key] = $this->_flatten($tree[$key]);
        }
    
        return $tree;
    }
    
    function startElement($parser, $name, $attrs)
    {
        // If var already defined, make array
        eval('$test=isset('.$this->_obj->tree.'->'.$name.');');
        if ($test) {
            eval('$tmp='.$this->_obj->tree.'->'.$name.';');
            eval('$arr=is_array('.$this->_obj->tree.'->'.$name.');');
            if (!$arr) {
                eval('unset('.$this->_obj->tree.'->'.$name.');');
                eval($this->_obj->tree.'->'.$name.'[0]=$tmp;');
                $cnt = 1;
            }    else {
                eval('$cnt=count('.$this->_obj->tree.'->'.$name.');');
            }
    
            $this->_obj->tree .= '->'.$name."[$cnt]";
        } else {
            $this->_obj->tree .= '->'.$name;
        }
    
        if (count($attrs)) {
            eval($this->_obj->tree.'->attr=$attrs;');
        }
    }
    
    function endElement($parser, $name)
    {
        // Strip off last ->
        for($a=strlen($this->_obj->tree);$a>0;$a--) {
            if (substr($this->_obj->tree, $a, 2) == '->') {
                $this->_obj->tree = substr($this->_obj->tree, 0, $a);
                break;
            }
        }
    }

    function _escapePHPSingleQuotedString($string)
    {
        return preg_replace('#([\'\])#', '\1', $string);        
    }            
    
    function characterData($parser, $data)
    {
        $data = $this->_escapePHPSingleQuotedString($data);
            
        if ($data !== '')
            eval($this->_obj->tree.'->data.=\''.$data.'\';');
    }
    
    function getTree()
    {
        return $this->_xmltree;
    }
}

?> <?

// +----------------------------------------------------------------------+
// | YahooAPI                                                             |
// | Uses Yahoo REST API to obtain search results                         |
// +----------------------------------------------------------------------+
// | Copyright (c) 2004 Jaimie Sirovich                                   |
// +----------------------------------------------------------------------+
// | Author: Jaimie Sirovich <jsirovic@gmail.com>                         |
// +----------------------------------------------------------------------+

class YahooAPI
{
    
    var $_parameters;
    
    function YahooAPI($app_id)
    {        
        $_parameters = array();
        
        $this->setParameter('appid', $app_id);
    }
    
    function setParameter($key, $value)
    {
        $this->_parameters[$key] = $value;
    }
    
    function simpleQuery($query_string, $limit = '', $offset = '')
    {
        $this->setParameter('query', $query_string);
        if ($limit)     $this->setParameter('results', $limit);            
        if ($offset) $this->setParameter('start', $offset);        
        return $this->executeQuery();
    }
    
    function spellCheckQuery($query_string)
    {
        $this->setParameter('query', $query_string);
        $xml_parser = new xmlTreeParser('', $this->_executeQuery('spellingSuggestion'));        
        $tmp = $xml_parser->getTree();
        return $tmp->ResultSet->Result;
    }

    function imageQuery($query_string)
    {
        $this->setParameter('query', $query_string);
        if ($limit)     $this->setParameter('results', $limit);            
        if ($offset) $this->setParameter('start', $offset);        
        return $this->executeImageQuery('imageSearch');
    }    

    function newsQuery($query_string, $limit = '', $offset = '')
    {
        $this->setParameter('query', $query_string);
        if ($limit)     $this->setParameter('results', $limit);            
        if ($offset) $this->setParameter('start', $offset);        
        return $this->executeNewsQuery('newsSearch');
    }        
    
    function _executeNewsQuery($service_name)
    {
        $url = "http://api.search.yahoo.com/NewsSearchService/V1/$service_name";
        
        $params = $this->_parameters;
        
        foreach ($params as $index => $p) {
            $params[$index] = "$index=" . urlencode($p);
        }
        
        $param_str = implode('&', $params);

        $full_url = $url . '?' . $param_str;
        
        //echo $full_url;
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$full_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        
        $result = curl_exec($ch);
        
        //echo htmlentities($result);
        
        curl_close($ch);

        return $result;    
    }        
    
    function _executeImageQuery($service_name)
    {
        $url = "http://api.search.yahoo.com/ImageSearchService/V1/$service_name";
        
        $params = $this->_parameters;
        
        foreach ($params as $index => $p) {
            $params[$index] = "$index=" . urlencode($p);
        }
        
        $param_str = implode('&', $params);

        $full_url = $url . '?' . $param_str;
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$full_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        
        $result = curl_exec($ch);
        curl_close($ch);

        return $result;    
    }    
    
    function _executeQuery($service_name)
    {
        $url = "http://api.search.yahoo.com/WebSearchService/V1/$service_name";
        
        $params = $this->_parameters;
        
        foreach ($params as $index => $p) {
            $params[$index] = "$index=" . urlencode($p);
        }
        
        $param_str = implode('&', $params);
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_POST,1);
        curl_setopt($ch, CURLOPT_POSTFIELDS,$param_str);
        curl_setopt($ch, CURLOPT_URL,$url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        
        $result = curl_exec($ch);
        curl_close($ch);
        
        return $result;    
    }
    
    function executeNewsQuery($service_name = 'newsSearch')
    {
        return $this->_parseXML($this->_executeNewsQuery($service_name));
    }    
    
    function executeImageQuery($service_name = 'imageSearch')
    {    
           return $this->_parseXML($this->_executeImageQuery($service_name));
    }    
    
    function executeQuery($service_name = 'webSearch')
    {    
           return $this->_parseXML($this->_executeQuery($service_name));
    }
        
    function _arrayizeVar($var, $nulls_to_empty_arrays = false)
    {
        if (!is_array($var)) {
            
            if ($var === null && $nulls_to_empty_arrays) {
                return array();
            } else {
                return array($var);    
            }
            
        } else {
            return $var;    
        }
    }    
    
    function _parseXML($xml)
    {
        
        $xml_parser = new xmlTreeParser('', $xml);
        
        $tmp = $xml_parser->getTree();
        
        //print_ar($tmp);
        
        $result_array = array();
        
        $result_array['total_results'] = $tmp->ResultSet->attr['totalResultsAvailable'];
        
        $results_tmp = array();
        
        if ($tmp->ResultSet->Result) foreach ($this->_arrayizeVar($tmp->ResultSet->Result) as $result) {
            
            $results_tmp[] = array('title' => $result->Title, 'description' => $result->Summary, 'url' => $result->Url, 'summary' => $result->Summary, 'date_reported' => $result->PublishDate);
            
        }
        
        $result_array['results'] = $results_tmp;
        
        return $result_array;
        
    }

    function makeURL($query_string, $limit = '', $offset = '', $additional_parameters = '')
    {
        $url = 'http://search.yahoo.com/search?';
        
        $params = array();

        $params['p'] = $query_string;        
        $params['n'] = $limit;
        $params['b'] = $offset;
        
        if ($additional_parameters)
            $params = array_merge($params, $additional_parameters);
        
        foreach ($params as $index => $p) {
            $params[$index] = "$index=" . urlencode($p);
        }
        
        $param_str = implode('&', $params);
        
        return $url . $param_str;
    }    
    
}

?>