<?
include_once("schema_loader.php5");

class query_object {

    //String Vars that are suppplied through search form
    public $project;
    public $query_type;
    public $max_conditions;
    public $search_stripped_fields;
    public $schema;
    public $stylesheet;    
    public $page;
    public $max_results;
    public $pre_processing_script;
    public $post_processing_script;


    public $sort_order; //must be preprocessed to deal with indexing of database columns

    //Array Vars supplied through search form
    public $db_cols;
    public $reg_exps;
    public $strings;
    public $connectives;
    public $user_char_classes;
    public $xml_char_classes;


    //Vars that are produced aftery querying database
    public $query;
    public $link;
    public $xml;
    public $main_ids;
       
    public $string_var_names;

    function __construct() {
	$this->project = "";

	$this->max_conditions = "";
	$this->max_results = "";
	$this->page = "";
	$this->pre_processing_script = "";
	$this->post_processing_script = "";
	$this->query_type = "";
	$this->schema = "";
	$this->search_stripped_fields = false;
	$this->stylesheet = "";
	$this->xml_char_classes = "";
	$this->string_var_names = array("max_conditions","max_results","pre_processing_script",
					"post_processing_script","query_type","schema",
					"search_stripped_fields","stylesheet");

	$this->sort_order = "";	

	$this->connectives = array();
	$this->db_cols = array();
	$this->reg_exps = array();
	$this->strings = array();
	$this->user_char_classes = array();
	      	
	$this->main_ids = array();
	$this->query = "";
	$this->xml = "";
	$this->link = "";
    }

/******************************* project ****************************/

    function set_project($project) {
	$this->project = $project;
    }

    function get_project() {
	return $this->project;
    }

/******************************* query_type  ****************************/

    function set_query_type($query_type) {
	$this->query_type = $query_type;
    }

    function get_query_type() {
	return $this->query_type;
    }


/******************************* max_conditions  ****************************/

    function set_max_conditions($max_conditions) {
	$this->max_conditions = $max_conditions;
    }

    function get_max_conditions() {
	return $this->max_conditions;
    }
	

/******************************* condition_set  ****************************/
    function reset_condition_set() {	
	$this->db_cols = array();
	$this->reg_exps = array();
	$this->strings = array();
	$this->connectives = array();
    }

    function add_condition_set($db_cols,$reg_exp,$string) {
	$this->db_cols[] = $db_cols;
	$this->reg_exps[] = $reg_exp;
	$this->strings[] = $string;
    }


/******************************* db_cols  ****************************/
    function get_db_cols($i) {
	if(count($this->db_cols) > $i) {	
	    return $this->db_cols[$i];
	}
	else
	    return false;
    }

    function set_db_cols($db_cols) {
	$this->db_cols = $db_cols;
    }

/******************************* reg_exps  ****************************/
    
    function get_reg_exp($i) {
	if(count($this->reg_exps) > $i) {	
	    return $this->reg_exps[$i];
	}
	else
	    return false;
    }
    
    function set_reg_exps($reg_exps) {
	$this->reg_exps = $reg_exps;
    }

/******************************* strings  ****************************/

    function get_string($i) {
	if(count($this->strings) > $i) {	
	    return $this->strings[$i];
	}
	else
	    return false;
    }

    function set_strings($strings) {
	$this->strings = $strings;
    }

/******************************* connnectives  ****************************/

    function add_connective($connective) {
	$this->connectives[] = $connective;
    }

    function get_connective($i) {
	if(count($this->connectives) > $i) {	
	    return $this->connectives[$i];
	}
	else
	    return false;
    }

    function get_last_connective() {
	return end($this->connectives);
    }


/******************************* search_stripped_fields  ****************************/
        
    function get_search_stripped_fields() {
	return $this->search_stripped_fields;
    }

    function set_search_stripped_fields($search_stripped_fields) {
	$this->search_stripped_fields = $search_stripped_fields;
    }

/******************************* stylesheet  ****************************/

    function get_stylesheet() {
	return $this->stylesheet;
    }

    function set_stylesheet($stylesheet) {
	$this->stylesheet = $stylesheet;
    }

/******************************* schema  ****************************/

    function get_schema() {
	return $this->schema;
    }

    function set_schema($schema) {
	$this->schema = $schema;
    }

/******************************* sort_order  ****************************/

    function get_sort_order() {
	return $this->sort_order;
    }	
    

    /**
     * For now, this function takes a comma delimited string of non-indexed fields, e.g. lxa,lxo not lxa_0,lxo_0;
    */
    function set_sort_order($sort_order) {
	$sort_fields = explode(",",$sort_order);
	if(count($sort_fields) != 0) {
	    $sort_order = "";
	    $sl = new schema_loader();
	    $schema = $this->schema;
	    if($this->schema == "") {
		$schema = "../$this->project/schema.xml";
	    }
	    else {
		$schema = "../$this->project/$schema";
	    }
	    if(!file_exists($schema)) {
		die("No schema file in project folder $this->project");
	    }
	    $group = $sl->create_group_structure($schema,"");
	    
	    foreach($sort_fields as $field) {
		$field = trim($field);
		if(array_key_exists($field,$group->fields)) {
		    $num_fields = $group->fields[$field];
		    for($i=0;$i<$num_fields;$i++) {
			$sort_order .= $field."_".$i.",";
		    }
		}
	    }
	    $this->sort_order = substr($sort_order,0,-1);
	}
	else 
	    $this->sort_order = "";
    }

/******************************* char_classes  ****************************/

    function get_char_classes() {
	$char_classes = array();
	if((count($this->xml_char_classes) != 0) || (count($this->user_char_classes) != 0)) {
	    $char_classes = array_merge($this->xml_char_classes, $this->user_char_classes);
	}
	return $char_classes;
    }

/******************************* user_char_classes  ****************************/

    function load_user_char_classes($user_char_classes) {
	if($user_char_classes != "") {
	    $lines = explode("\n",$user_char_classes);
	    foreach($lines as $line) {
		$vals = explode(" = ",$line);
		$this->user_char_classes[$vals[0]] = $vals[1];
	    }
	}
    }

/******************************* xml_char_classes  ****************************/

    function get_xml_char_classes() {
	return $this->xml_char_classes;
    }

    function set_xml_char_classes($xml_char_classes) {
	$this->xml_char_classes = "../".$this->get_project()."/".$xml_char_classes;
    }

    function load_xml_char_classes($xml_char_classes) {
	if($xml_char_classes != "") {
	    $xcc = array();
	    $char_xml = simplexml_load_file($xml_char_classes);
	    foreach($char_xml->children() as $class) {
		$xcc[(string)$class->NAME] = (string)$class->VALUE;
	    }
	    $this->xml_char_classes = $xcc;
	}
    }


/******************************* page  ****************************/

    function get_page() {	
	return $this->page;
    }

    function set_page($page) {
	$this->page = $page;
    }

/******************************* main_ids  ****************************/

    function get_main_ids() {
	return $this->main_ids;
    }

    function set_main_ids($main_ids) {
	$this->main_ids = $main_ids;
    }

/******************************* max_results  ****************************/
    
    function get_max_results() {
	return $this->max_results;
    }

    function set_max_results($max_results) {
	$this->max_results = $max_results;
    }

/******************************* xml  ****************************/
    
    function get_xml() {
	return $this->xml;
    }

    function set_xml($xml) {
	$this->xml = $xml;
    }

/******************************* pre_processing_script  ****************************/
    
    function get_pre_processing_script() {
	return $this->pre_processing_script;
    }

    function set_pre_processing_script($pre_processing_script) {
	$this->pre_processing_script = $pre_processing_script;
    }


/******************************* post_processing_script  ****************************/
    
    function get_post_processing_script() {
	return $this->post_processing_script;
    }

    function set_post_processing_script($post_processing_script) {
	$this->post_processing_script = $post_processing_script;
    }

/******************************* num_conditions  ****************************/

    function get_num_conditions() {
	return count($this->strings);	
    }


/******************************* subqueries  ****************************/

    function get_query() {
	return $this->query;
    }

    function set_query($query) {
	$this->query = $query;
    }

/******************************* link  ****************************/

    function get_link() {
	return $this->link;
    }

    function set_link($link) {
	$this->link = $link;
    }


/******************************* group  ****************************/

   function get_group() {
       $project = $this->get_project();
       $schema = $this->get_schema();
       if($schema == "")
	   $schema = "../$project/schema.xml";
       else
	   $schema = "../$project/$schema";
       $sl = new schema_loader();
       $group = $sl->create_group_structure($schema,"");
       return $group;
    }

/******************************* print_values  ****************************/

    function print_values() {
	echo "Project: $this->project <BR>";
	echo "Query Type: $this->query_type<BR>";
	echo "Max Conditions: $this->max_conditions<BR>";

	echo "Db_cols:<BR>";
	foreach($this->db_cols as $i=>$cols) {
	    echo "$i: $cols<BR>";
	}
	echo "Reg_exps:<BR>";
	foreach($this->reg_exps as $i=>$reg) {
	    echo "$i: $reg<BR>";
	}

	echo "Strings:<BR>";
	foreach($this->strings as $i=>$string) {
	    echo "$i: $string<BR>";
	}

	echo "Connectives:<BR>";
	foreach($this->connectives as $i=>$con) {
	    echo "$i: $con<BR>";
	}
	echo "Search Stripped Fields: $this->search_stripped_fields<BR>";
	echo "Schema: $this->schema<BR>";
	echo "Sort Order: $this->sort_order<BR>";
	echo "Stylesheet: $this->stylesheet<BR>";
	echo "XML Char Classes:<BR>";
	foreach($this->xml_char_classes as $k=>$c) {
	    echo "$k: $c<BR>";
	}
	echo "User Char Classes:<BR>";
	foreach($this->user_char_classes as $k=>$c) {
	    echo "$k: $c<BR>";
	}
    
	echo "Page: $this->page<BR>";
	echo "Main Ids:<BR>";
	foreach($this->main_ids as $id) {
	    echo "$id ";
	}
	echo "<BR>";
	echo "Max Results: $this->max_results<BR>";

	echo "xml: $this->xml<BR>";
	
	echo "Pre-processing Script: $this->pre_processing_script<BR>";
	echo "Post-processing Script: $this->post_processing_script<BR>";

	echo "Query: $this->query<BR>";
	echo "Link: $this->link<BR>";
    }


/******************************* assign_value ****************************/
    function assign_value($form_vars, $defaults, $var_name) {
	$var = trim($form_vars[$var_name]);
	if($var == "") {
	    $function = "get_$var_name";
	    $var = $this->$function();
	    if($var == "") {
		$var = $defaults[$var_name];
	    }
	}
	$function = "set_$var_name";
	$this->$function($var);
    }
/******************************* get_project_defaults  ****************************/
    
    function get_project_defaults($defaults_file) {
	$defaults = array();
	$defaults_xml = simplexml_load_file($defaults_file);
	foreach($defaults_xml->children() as $tag=>$value) {
	    $defaults["".$tag] = "".$value;
	}
	return $defaults;
    }

/******************************* fill_query_object  ****************************/

    //Order of precedence: $form_vars > current > defaults
    function fill_query_object($form_vars,$defaults) {
	$project = $form_vars["project"];
	$this->set_project($project);

	if((count($defaults) == 0) || ($defaults=="")) {
	    $defaults_file = "../$project/defaults.xml";
	    $defaults = array();
	    if(file_exists($defaults_file)) {
		$defaults = $this->get_project_defaults($defaults_file);
	    }
	}

	foreach($this->string_var_names as $var_name) {
	    $this->assign_value($form_vars,$defaults,$var_name);
	}


	$page = trim($form_vars["page"]);
	$this->set_page($page);

	if($defaults["xml_char_classes"] != "") {
	    $xml_char_classes = "../$project/".$defaults["xml_char_classes"];
	    $this->load_xml_char_classes($xml_char_classes);
	}
	if($form_vars["user_char_classes"] != "") {
	    $user_char_classes = $form_vars["user_char_classes"];
	    $this->load_user_char_classes($user_char_classes);	 
	}   

	$sort_order = strtolower(trim($form_vars["sort_order"]));
	if($sort_order == "") {
	    $sort_order = $defaults["sort_order"];
	}
	$this->set_sort_order($sort_order);

	
	$reg_exps = array();
	$xml = simplexml_load_file("../$project/reg_exps.xml");
	foreach($xml->children() as $set) {
	    $english = "".$set->ENGLISH;
	    $value = "".$set->VALUE;
	    $reg_exps[$english] = $value;
	}

	$xml = simplexml_load_file("../$project/phrases_and_fields.xml");
	$phrases_and_fields = array();
	foreach($xml->children() as $set) {
	    $phrases_and_fields["".$set->ENGLISH] = "".$set->VALUE;
	}
	$address = getenv("SERVER_NAME");
	$script =  getenv("REQUEST_URI");
	$script = ereg_replace("[?].*","",$script);
	$link = "http://".$address.$script."?project=$project";

	$max_conditions = $this->get_max_conditions();
	$this->reset_condition_set();
	for($i=0;$i<$max_conditions;$i++) {
	    $db_cols_var = "db_cols_".$i;
	    $db_cols = trim($form_vars[$db_cols_var]);
	    if(array_key_exists($db_cols,$phrases_and_fields)) {
		$db_cols = $phrases_and_fields[$db_cols];
	    }
	    $reg_exp_var = "reg_exp_".$i;
	    $reg_exp = stripslashes($form_vars[$reg_exp_var]);
	    if(array_key_exists($reg_exp,$reg_exps)) {
		$reg_exp = $reg_exps[$reg_exp];
	    }
		
	    $string_var = "string_".$i;
	    $string = trim($form_vars[$string_var]);
	    $string = ereg_replace("[+]","\\\+",$string);
	    
	    $connective_var = "connective_".($i);
	    $connective = trim($form_vars[$connective_var]);
	    
	    if($string != "" || ereg("<>", $reg_exp)) {
		$link .= "&$db_cols_var=$db_cols&$reg_exp_var=$reg_exp&$string_var=$string&$connective_var=$connective";
		$this->add_condition_set($db_cols,$reg_exp,$string);
		$this->add_connective($connective);
	    }
	}
	$link = ereg_replace("&","&amp;",$link);
	$link = ereg_replace("<","&lt;",$link);
	$link = ereg_replace(">","&gt;",$link);
	$this->set_link($link);

    }
}


?>