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/home/cluster1/data/bu01/1121861/jlex/nahuatl/php5/embedded_xml_cleanser.php5

<?
include_once("../../php5/schema_discoverer.php5");
include_once("../../php5/schema_loader.php5");
include_once("../../php5/db_connection.php5");

class embedded_xml_cleanser {

public $parser;
    public $emb_parser;
    public $data;
    public $emb_data;
    public $group;
    public $emb_tags;
    public $id;
    public $results;
    public $cur_tag;
    public $db_cols;
    public $id_start;
    public $id_end;

function __construct() {
	$this->emb_tags = array();
	$this->ref = -1;
	$this->results = array();
	$this->db_cols = array();
	$this->id_start = -1;
	$this->id_end = 1000000;
    }

function startHandler($xp, $element, $attributes) {
	$element = strtolower($element);
	set_time_limit(100);
    }

function cDataHandler($xp,$data) {
	if(trim($data) != "") {		
	    $this->data .= $data;
	}
    }

function embEnd($xp,$element) {
	$element = strtolower($element);
	if(array_key_exists($element,$this->db_cols)) {
	    $this->results[$this->id][$this->cur_tag][$element][] = $this->emb_data;
	}
	$this->emb_data = "";
    }

function embCData($xp,$data) {
	if(trim($data) != "") {
	    $this->emb_data .= $data;
	}
    }

function get_embedded_tag_content($xml) {

$this->parser = xml_parser_create();
	xml_set_object($this->parser, $this);
	xml_set_element_handler($this->parser, "startHandler", "endHandler");
	xml_set_character_data_handler($this->parser, "cDataHandler");

$this->emb_parser = xml_parser_create();
	xml_set_object($this->emb_parser, $this);
	xml_set_element_handler($this->emb_parser, "embStart", "embEnd");
	xml_set_character_data_handler($this->emb_parser, "embCData");
	
	xml_parse($this->emb_parser,"<set>",false);

$in = fopen($xml,"r");
	$line_num = 0;
	while($line = fgets($in)) {
	    $line_num++;
	    xml_parse($this->parser,$line,false);
	    set_time_limit(100);
	    //echo "line: $line_num \n";
	}
	sort($this->emb_tags);
	return $this->results;
    }

/**
     * This takes a string argument in the form tag = field1,field2,field3,etc.
     */
    function get_db_cols($textarea) {
	$lines = explode("\n",$textarea);
	$db_cols = array();
	foreach($lines as $line) {
	    $vals = explode(" = ",$line);
	    $tag = trim($vals[0]);
	    $db_cols[$tag] = explode(",",$vals[1]);
	}
	return $db_cols;
    }

function get_starter_queries($project, $db_cols) {
	$starter_queries = array();

foreach($db_cols as $tag=>$cols) {
	    $query_cols = "";
	    $tables_used = array();
	    foreach($cols as $col) {
		if(ereg("[!]",$col)) {
		    $col = substr($col,1);
		}
		$group_names = $this->group->find_group($col);
		foreach($group_names as $group_name=>$count) {
		    $table = $project."_".$group_name;
		    if(!in_array($table,$tables_used)) {
			$tables_used[] = $table;
		    }
		    for($j=0;$j<$count;$j++) {
			$query_cols .= $col."_$j,";
		    }
		}
	    }
	    $query_cols = substr($query_cols,0,-1);
	    $query = "SELECT $query_cols FROM ";
	    $t = array_shift($tables_used);
	    foreach($tables_used as $table) {
		$t .= " LEFT JOIN $table USING (".$this->group->name."_id)";
	    }
	    $query .= $t;
	    $starter_queries[$tag] = $query;
	}
	
	return $starter_queries;
    }

function find_errors($form_vars) {
	$project = $form_vars["project"];
	$this->id_field = $form_vars["id_field"];
	
	/*
	$head_tag = strtolower($form_vars["head_tag"]);
	$sd = new schema_discoverer();
	$schema = $sd->create_schema($xml,$head_tag);

$out = fopen("nahuatl_full_schema.xml","w");
	fwrite($out,$schema);
	fclose($out);
	*/
	$schema = "nahuatl_full_schema.xml";
	$sl = new schema_loader();
	$this->group = $sl->create_group_structure($schema,"");
	$textarea = $form_vars["db_cols"];
	$this->db_cols = $this->get_db_cols($textarea);
	
	$starter_queries = $this->get_starter_queries($project,$this->db_cols);

$this->id_start = $form_vars["id_start"];
	if($this->id_start == "") {
	    $this->id_start == -1;
	}
	$this->id_end = $form_vars["id_end"];
	if($this->id_end == "") {
	    $this->id_end = 1000000;
	}

$db_xml = $form_vars["db_xml"];
	$this->get_embedded_tag_content($db_xml);

foreach($this->results as $id=>$fields) {
	    foreach($fields as $field=>$tags) {		
		foreach($tags as $tag=>$vals) {
		    foreach($vals as $value) {
			if(array_key_exists($tag,$starter_queries)) {
			    $col = $this->db_cols[$tag][0];
			    if(ereg("[!]",$col)) {
				$col = substr($col,1);
			    }
			    $query = $starter_queries[$tag]." WHERE ".$col."_0='$value'";
			    $query_result = mysql_query($query);
			    $row = mysql_fetch_assoc($query_result);
			    foreach($this->db_cols[$tag] as $col) {
				if(strpos($col,"!") === false) {
				    $should_be_empty = false;
				}
				else {
				    $col = substr($col,1);
				    $should_be_empty = true;
				}

$group_names = $this->group->find_group($col);
				$has_value = false;
				foreach($group_names as $name=>$count) {
				    if($has_value) {
					break;
				    }
				    for($i=0;$i<$count;$i++) {
					if($row[$col."_".$i] != "") {
					    $has_value = true;
					    break;
					}
				    }
				}
				if(!$has_value && !$should_be_empty) {
				    $has_error = true;
				    $message = "tag is $tag : but no entry exists with $col=$value";
				}
				else if($has_value && $should_be_empty){
				    $has_error = true;
				    $message = "tag is $tag : but there exists an entry with $col=$value";
				}
				if($has_error) {
				    echo "$this->id_field: $id : $field : $message <BR>";
				    $message = "";	    
				    $has_error = false;	    
				}
			    }
			}
		    }
		}
	    }
	}
    }
}
$form_vars = array_merge($_POST,$_GET);
$exc = new embedded_xml_cleanser();
$results = $exc->find_errors($form_vars);