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<?php
/**
* AurJSON
*
* This file contains the AurRPC remote handling class
**/
include_once("aur.inc");
/**
* This class defines a remote interface for fetching data
* from the AUR using JSON formatted elements.
* @package rpc
* @subpackage classes
**/
class AurJSON {
private $dbh = false;
private static $exposed_methods = array('search', 'info', 'msearch');
private static $fields = array(
'Packages.ID', 'Name', 'Version', 'CategoryID',
'Description', 'URL', 'License',
'NumVotes', '(OutOfDateTS IS NOT NULL) AS OutOfDate'
);
/**
* Handles post data, and routes the request.
* @param string $post_data The post data to parse and handle.
* @return string The JSON formatted response data.
**/
public function handle($http_data) {
// handle error states
if ( !isset($http_data['type']) || !isset($http_data['arg']) ) {
return $this->json_error('No request type/data specified.');
}
// do the routing
if ( in_array($http_data['type'], self::$exposed_methods) ) {
// set up db connection.
$this->dbh = db_connect();
// ugh. this works. I hate you php.
$json = call_user_func(array(&$this, $http_data['type']),
$http_data['arg']);
// allow rpc callback for XDomainAjax
if ( isset($http_data['callback']) ) {
// it is more correct to send text/javascript
// content-type for jsonp-callback
header('content-type: text/javascript');
return $http_data['callback'] . "({$json})";
}
else {
// set content type header to app/json
header('content-type: application/json');
return $json;
}
}
else {
return $this->json_error('Incorrect request type specified.');
}
}
/**
* Returns a JSON formatted error string.
*
* @param $msg The error string to return
* @return mixed A json formatted error response.
**/
private function json_error($msg) {
// set content type header to app/json
header('content-type: application/json');
return $this->json_results('error', $msg);
}
/**
* Returns a JSON formatted result data.
* @param $type The response method type.
* @param $data The result data to return
* @return mixed A json formatted result response.
**/
private function json_results($type, $data) {
return json_encode( array('type' => $type, 'results' => $data) );
}
private function process_query($type, $query) {
$result = db_query($query, $this->dbh);
if ( $result && (mysql_num_rows($result) > 0) ) {
$search_data = array();
while ( $row = mysql_fetch_assoc($result) ) {
$name = $row['Name'];
$row['URLPath'] = URL_DIR . $name . "/" . $name . ".tar.gz";
if ($type == 'info') {
$search_data = $row;
break;
}
else {
array_push($search_data, $row);
}
}
mysql_free_result($result);
return $this->json_results($type, $search_data);
}
else {
return $this->json_error('No results found');
}
}
/**
* Performs a fulltext mysql search of the package database.
* @param $keyword_string A string of keywords to search with.
* @return mixed Returns an array of package matches.
**/
private function search($keyword_string) {
if (strlen($keyword_string) < 2) {
return $this->json_error('Query arg too small');
}
$fields = implode(',', self::$fields);
$keyword_string = mysql_real_escape_string($keyword_string, $this->dbh);
$keyword_string = addcslashes($keyword_string, '%_');
$query = "SELECT {$fields} " .
" FROM Packages WHERE " .
" ( Name LIKE '%{$keyword_string}%' OR " .
" Description LIKE '%{$keyword_string}%' )";
return $this->process_query('search', $query);
}
/**
* Returns the info on a specific package.
* @param $pqdata The ID or name of the package. Package Query Data.
* @return mixed Returns an array of value data containing the package data
**/
private function info($pqdata) {
$fields = implode(',', self::$fields);
$base_query = "SELECT {$fields} " .
" FROM Packages WHERE ";
if ( is_numeric($pqdata) ) {
// just using sprintf to coerce the pqd to an int
// should handle sql injection issues, since sprintf will
// bork if not an int, or convert the string to a number 0
$query_stub = "ID={$pqdata}";
}
else {
$query_stub = sprintf("Name=\"%s\"",
mysql_real_escape_string($pqdata, $this->dbh));
}
$query = $base_query . $query_stub;
return $this->process_query('info', $query);
}
/**
* Returns all the packages for a specific maintainer.
* @param $maintainer The name of the maintainer.
* @return mixed Returns an array of value data containing the package data
**/
private function msearch($maintainer) {
$fields = implode(',', self::$fields);
$maintainer = mysql_real_escape_string($maintainer, $this->dbh);
$query = "SELECT Users.Username as Maintainer, {$fields} " .
" FROM Packages, Users WHERE " .
" Packages.MaintainerUID = Users.ID AND " .
" Users.Username = '{$maintainer}'";
return $this->process_query('msearch', $query);
}
}
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