#Gocha#

<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/** Configurable Reports
  * A Moodle block for creating customizable reports
  * @package blocks
  * @author: Juan leyva <http://www.twitter.com/jleyvadelgado>
  * @date: 2009
  */

class component_calcs extends component_base{

function init(){
		$this->plugins = true;
		$this->ordering = false;
		$this->form = false;
		$this->help = true;
	}

function add_form_elements(&$mform,$components){
		global $DB, $CFG;

$components = cr_unserialize($components);
		$options = array();

if($this->config->type != 'sql'){
			if(!is_array($components) || empty($components['columns']['elements']))
				print_error('nocolumns');

$columns = $components['columns']['elements'];

$calcs = isset($components['calcs']['elements'])?  $components['calcs']['elements']: array();
			$columnsused = array();
			if($calcs){
				foreach($calcs as $c){
					$columnsused[] = $c['formdata']->column;
				}
			}

$i = 0;
			foreach($columns as $c){
				if(!in_array($i,$columnsused))
					$options[$i] = $c['summary'];
				$i++;
			}
		}
		else{
			require_once($CFG->dirroot.'/blocks/configurable_reports/report.class.php');
			require_once($CFG->dirroot.'/blocks/configurable_reports/reports/'.$this->config->type.'/report.class.php');

$reportclassname = 'report_'.$this->config->type;
			$reportclass = new $reportclassname($this->config);

$components = cr_unserialize($this->config->components);
			$config = (isset($components['customsql']['config']))? $components['customsql']['config'] : new stdclass;

if(isset($config->querysql)){

$sql =$config->querysql;
				$sql = $reportclass->prepare_sql($sql);
				if($rs = $reportclass->execute_query($sql)){
					foreach ($rs as $row) {
                        $i = 0;
                        foreach($row as $colname=>$value){
                            $options[$i] = str_replace('_', ' ', $colname);
                            $i++;
                        }
                        break;
                    }
					$rs->close();
				}
			}
		}

$mform->addElement('header',  'crformheader' ,get_string('coursefield','block_configurable_reports'), '');
		$mform->addElement('select', 'column', get_string('column','block_configurable_reports'), $options);

}