yolanda/trunk/search.pl

require "functions.pl";

#initialize session data
CGI::Session->name($session_name);
$query = new CGI;
$session = new CGI::Session;

@userinfo = get_userinfo_from_sid($session->id);

@page = get_page_array(@userinfo);

#check if query is set
if($query->param('query'))
{
	$page->{'search'} = [''];
	$page->{'results'}->{'query'} = $query->param('query');
	
	my @args = ();
	
	$strquery = $query->param('query');
	$strquery = s/%([0-9A-F]{2})/chr(hex($1))/eg;
	(@tags) = $strquery =~ /tag:(\w+)/gi;
	($orderby) = $strquery =~ /orderby:(\w+)/i;
	($sort) = $strquery =~ /sort:(\w+)/i;
	#($title) = $strquery =~ /title:(\w+)/i;
	#($description) = $strquery =~ /description:(\w+)/i;
	#($creator) = $strquery =~ /creator:(\w+)/i;
	#($language) = $strquery =~ /language:(\w+)/i;
	#($coverage) = $strquery =~ /coverage:(\w+)/i;
	#($rights) = $strquery =~ /rights:(\w+)/i;
	#($license) = $strquery =~ /license:(\w+)/i;
	#($filesize) = $strquery =~ /filesize:([<>]?\w+)/i;
	#($duration) = $strquery =~ /duration:([<>]?\w+)/i;
	#($timestamp) = $strquery =~ /timestamp:([<>]?\w+)/i;
	$strquery =~ s/(tag|orderby|sort):\w+//gi;
	$strquery =~ s/^\s*(.*?)\s*$/$1/;

	#build mysql query
	$dbquery = "select v.id, v.title, v.description, u.username,
		from_unixtime( v.timestamp ), v.creator, v.subject, 
		v.source, v.language, v.coverage, v.rights, v.license, filesize,
		duration, width, height, fps, viewcount, downloadcount";
	
	if($strquery)
	{
		$dbquery .= ", match(v.title, v.description, v.subject) against( ? in boolean mode) as relevance";
		$dbquery .= " from videos as v, users as u where u.id = v.userid";
		$dbquery .= " and match(v.title, v.description, v.subject) against( ? in boolean mode)";
		push @args, $strquery, $strquery;
	}
	else
	{
		$dbquery .= " from videos as v, users as u where u.id = v.userid";
	}
	
	if(@tags)
	{
		$dbquery .= " and match(v.subject) against (? in boolean mode)";
		push @args, "@tags";
	}
	
	if($publisher)
	{
		$dbquery .= " and match(u.username) against (? in boolean mode)";
		push @args, "$publisher";
	}
	
	if($orderby)
	{
		if($orderby eq 'filesize')
		{
			$dbquery .= " order by v.filesize";
		}
		elsif($orderby eq 'duration')
		{
			$dbquery .= " order by v.duration";
		}
		elsif($orderby eq 'viewcount')
		{
			$dbquery .= " order by v.viewcount";
		}
		elsif($orderby eq 'downloadcount')
		{
			$dbquery .= " order by v.downloadcount";
		}
		elsif($orderby eq 'timestamp')
		{
			$dbquery .= " order by v.timestamp";
		}
		elsif($orderby eq 'relevance' and $strquery)
		{
			$dbquery .= " order by relevance";
		}
		else
		{
			$dbquery .= " order by v.id";
		}
		
		if($sort eq "ascending")
		{
			$dbquery .= " asc";
		}
		elsif($sort eq "descending")
		{
			$dbquery .= " desc";
		}
	}
	
	fill_results(@args);
	
	if(@{$page->{'results'}->{'result'}} == 0)
	{
		print $query->redirect("index.pl?warning=warning_no_results");
	}
	elsif(@{$page->{'results'}->{'result'}} == 1 or $query->param('lucky'))
	{
		print $query->redirect($page->{'results'}->{'result'}[0]->{'rdf:RDF'}->{'cc:Work'}->{'dc:identifier'}[0]);
	}
	else
	{
		print output_page();
	}
}
elsif($query->param('advanced'))
{
	$page->{'advancedsearch'} = [''];
	print output_page();
}
else
{
	print $query->redirect("index.pl?error=error_no_query");
}