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<?PHP
/**
* patTemplate Reader that reads from a database using PEAR::DB
*
* $Id: DB.php 10381 2008-06-01 03:35:53Z pasamio $
*
* @package patTemplate
* @subpackage Readers
* @author Stephan Schmidt <schst@php.net>
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
/**
* PEAR::DB is not installed
*/
define('PATTEMPLATE_READER_DB_ERROR_CLASS_NOT_FOUND', 'patTemplate::Reader::DB::001');
/**
* Connection could not be established
*/
define('PATTEMPLATE_READER_DB_ERROR_NO_CONNECTION', 'patTemplate::Reader::DB::002');
/**
* Could not find input
*/
define('PATTEMPLATE_READER_DB_ERROR_NO_INPUT', 'patTemplate::Reader::DB::003');
/**
* Unknown input syntax
*/
define('PATTEMPLATE_READER_DB_ERROR_UNKNOWN_INPUT', 'patTemplate::Reader::DB::004');
/**
* patTemplate Reader that reads from a database using PEAR::DB
*
* $Id: DB.php 10381 2008-06-01 03:35:53Z pasamio $
*
* @package patTemplate
* @subpackage Readers
* @author Stephan Schmidt <schst@php.net>
*/
class patTemplate_Reader_DB extends patTemplate_Reader
{
/**
* reader name
* @access private
* @var string
*/
var $_name = 'DB';
/**
* read templates from the database
*
* Input may either be an SQL query or a string defining the location
* of the template using the format:
* <code>
* table[@key=value]/@templateField
* </code>
*
* @final
* @access public
* @param string file to parse
* @return array templates
*/
function readTemplates($input)
{
$content = $this->getDataFromDb($input);
if (patErrorManager::isError($content)) {
return $content;
}
$templates = $this->parseString($content);
return $templates;
}
/**
* fetch the template data from the database
*
* @access protected
* @param string input to read from
*/
function getDataFromDb($input)
{
// check for PEAR DB
if (!class_exists('DB')) {
@include_once 'DB.php';
if (!class_exists('DB')) {
return patErrorManager::raiseError(PATTEMPLATE_READER_DB_ERROR_CLASS_NOT_FOUND, 'This reader requires PEAR::DB which could not be found on your system.');
}
}
// establish connection
$db = &DB::connect($this->getTemplateRoot());
if (PEAR::isError($db)) {
return patErrorManager::raiseError(PATTEMPLATE_READER_DB_ERROR_NO_CONNECTION, 'Could not establish database connection: ' . $db->getMessage());
}
$input = $this->parseInputStringToQuery($input, $db);
if (patErrorManager::isError($input)) {
return $input;
}
$content = $db->getOne($input);
if (PEAR::isError($content)) {
return patErrorManager::raiseError(PATTEMPLATE_READER_DB_ERROR_NO_INPUT, 'Could not fetch template: ' . $content->getMessage());
}
return $content;
}
/**
* Parse the template location syntax to a query
*
* @access private
* @param string
* @param DB_common
*/
function parseInputStringToQuery($input, $db)
{
// Input is no query
if (strstr($input, 'SELECT') !== false) {
return $input;
}
$matches = array();
if (!preg_match('/^([a-z]+)\[([^]]+)\]\/@([a-z]+)$/i', $input, $matches)) {
return patErrorManager::raiseError(PATTEMPLATE_READER_DB_ERROR_UNKNOWN_INPUT, 'Could not parse input string.');
}
$table = $matches[1];
$templateField = $matches[3];
$where = array();
$tmp = explode(',', $matches[2]);
foreach ($tmp as $clause) {
list($field, $value) = explode('=', trim($clause));
if ($field{0} !== '@') {
return patErrorManager::raiseError(PATTEMPLATE_READER_DB_ERROR_UNKNOWN_INPUT, 'Could not parse input string.');
}
$field = substr($field, 1);
array_push($where, $field . '=' . $db->quoteSmart($value));
}
$query = sprintf('SELECT %s FROM %s WHERE %s', $templateField, $table, implode(' AND ', $where));
return $query;
}
/**
* load template from any input
*
* If the a template is loaded, the content will not get
* analyzed but the whole content is returned as a string.
*
* @abstract must be implemented in the template readers
* @param mixed input to load from.
* This can be a string, a filename, a resource or whatever the derived class needs to read from
* @return string template content
*/
function loadTemplate($input)
{
$content = $this->getDataFromDb($input);
return $content;
}
}
?>