<?php
/* For licensing terms, see /license.txt */

/**
 * With this tool you can easily adjust non critical configuration settings.
 * Non critical means that changing them will not result in a broken campus.
 *
 * @author Patrick Cool
 * @author Julio Montoya - Multiple URL site
 * @package chamilo.admin
 */

/* INIT SECTION */

// Language files that need to be included.
if (isset($_GET['category']) && $_GET['category'] == 'Templates') {
    $language_file = array('admin', 'document');
} else if(isset($_GET['category']) && $_GET['category'] == 'Gradebook') {
    $language_file = array('admin', 'gradebook');
} else {
    $language_file = array('admin', 'document');
}
$language_file[] = 'tracking';

// Resetting the course id.
$cidReset = true;

// Including some necessary library files.
require_once '../inc/global.inc.php';
require_once api_get_path(LIBRARY_PATH).'fileManage.lib.php';
require_once api_get_path(LIBRARY_PATH).'fileUpload.lib.php';
require_once 'settings.lib.php';

// Setting the section (for the tabs).
$this_section = SECTION_PLATFORM_ADMIN;
$_SESSION['this_section'] = $this_section;

// Access restrictions.
api_protect_admin_script();

// Settings to avoid
$settings_to_avoid = array(
    'use_session_mode'                  => 'true',
    'gradebook_enable'                  => 'false',    
    'example_material_course_creation'  => 'true' // ON by default - now we have this option when  we create a course 
);

$convert_byte_to_mega_list = array('dropbox_max_filesize', 'message_max_upload_filesize', 'default_document_quotum', 'default_group_quotum');

// Submit stylesheets.
if (isset($_POST['submit_stylesheets'])) {
    $message = store_stylesheets();
    header("Location: ".api_get_self()."?category=Stylesheets");
    exit;
}

if (isset($_POST['style'])) {
    Display::$preview_style = $_POST['style'];
}

// Database table definitions.
$table_settings_current = Database :: get_main_table(TABLE_MAIN_SETTINGS_CURRENT);

// Setting breadcrumbs.
$interbreadcrumb[] = array('url' => 'index.php', 'name' => get_lang('PlatformAdmin'));

// Setting the name of the tool.
$tool_name = get_lang('PlatformConfigSettings');
if (empty($_GET['category'])) {
    $_GET['category'] = 'Platform';
}
$watermark_deleted = false;
if (isset($_GET['delete_watermark'])) {
    $watermark_deleted = PDF::delete_watermark();    
}

if (isset($_GET['action']) &&  $_GET['action'] == 'delete_grading') {
	$id = intval($_GET['id']);
	api_delete_setting_option($id);
}

$form_search = new FormValidator('search_settings', 'get', api_get_self() , null, array('class'=>'well form-inline'));
$form_search->addElement('text', 'search_field');
$form_search->addElement('hidden', 'category', 'search_setting');
$form_search->addElement('style_submit_button', 'submit_button', get_lang('Search'), 'value="submit_button", class="search"');         
$form_search->setDefaults(array('search_field' => $_REQUEST['search_field']));

$form_search_html = $form_search->return_form();

$url_id = api_get_current_access_url_id();

$settings = null;

function get_settings($category = null) {
    $url_id = api_get_current_access_url_id();
    
    if ($url_id == 1) {    
        $settings = api_get_settings($category, 'group', $url_id);        
    } else {
        $url_info = api_get_access_url($url_id);
        if ($url_info['active'] == 1) {
            // The default settings of Chamilo
            $settings = api_get_settings($category, 'group', 1, 0);
            // The settings that are changeable from a particular site.
            $settings_by_access = api_get_settings($category, 'group', $url_id, 1);
            
            $settings_by_access_list = array();
            foreach ($settings_by_access as $row) {
                if (empty($row['variable']))
                    $row['variable'] = 0;
                if (empty($row['subkey']))
                    $row['subkey'] = 0;
                if (empty($row['category']))
                    $row['category'] = 0;
                
                // One more validation if is changeable.
                if ($row['access_url_changeable'] == 1)
                    $settings_by_access_list[ $row['variable'] ] [ $row['subkey'] ] [ $row['category'] ]  = $row;
                else
                    $settings_by_access_list[ $row['variable'] ] [ $row['subkey'] ] [ $row['category'] ]  = array();
            }
        }
    }
    
    if (isset($category) && $category== 'search_setting') {  
        if (!empty($_REQUEST['search_field'])) {
            $settings = search_setting($_REQUEST['search_field']);                               
        }
    }
    return $settings;
}


// Build the form.
if (!empty($_GET['category']) && !in_array($_GET['category'], array('Plugins', 'stylesheets', 'Search'))) {
    $my_category = isset($_GET['category']) ? $_GET['category'] : null;
    $settings = get_settings($my_category);
    
    $form = generate_settings_form($settings, $settings_by_access_list);
        
    $message = array();
    
    if ($form->validate()) {    
        $values = $form->exportValues();   
        
        $mark_all = false;
        $un_mark_all = false;
        
        if ( $_configuration['multiple_access_urls']) {        
            if (isset($values['buttons_in_action_right']) && isset($values['buttons_in_action_right']['mark_all'])) {
                $mark_all = true;
            }

            if (isset($values['buttons_in_action_right']) && isset($values['buttons_in_action_right']['unmark_all'])) {
                $un_mark_all = true;
            }
        }
        
        if ($mark_all || $un_mark_all) {
            if (api_is_global_platform_admin()) {
                $locked_settings = api_get_locked_settings();
                foreach ($values as $key => $value) {
                    if (!in_array($key, $locked_settings)) {
                        
                        $changeable = 0;
                        if ($mark_all) {
                            $changeable = 1;
                        }                        
                        
                        $params = array('variable = ?' =>  array($key));
                        $data = api_get_settings_params($params);                        
                         
                        if (!empty($data)) {
                            foreach ($data as $item) {                
                                $params = array('id' =>$item['id'], 'access_url_changeable' => $changeable);                                
                                api_set_setting_simple($params);    
                            }
                        }
                    }
                }
                //Reload settings
                $settings = get_settings($my_category);
                $form = generate_settings_form($settings, $settings_by_access_list);
            }
        }                
        $pdf_export_watermark_path = $_FILES['pdf_export_watermark_path'];
         
        if (isset($pdf_export_watermark_path) && !empty($pdf_export_watermark_path['name'])) {       
            $pdf_export_watermark_path_result = PDF::upload_watermark($pdf_export_watermark_path['name'], $pdf_export_watermark_path['tmp_name']);  
            if ($pdf_export_watermark_path_result) {
                $message['confirmation'][] = get_lang('UplUploadSucceeded');
            } else {                
                $message['warning'][] = get_lang('UplUnableToSaveFile').' '.get_lang('Folder').': '.api_get_path(SYS_CODE_PATH).'default_course_document/images';
            }
            unset($update_values['pdf_export_watermark_path']);
        }

        // Set true for allow_message_tool variable if social tool is actived       
        foreach ($convert_byte_to_mega_list as $item) {
			if (isset($values[$item])) {
				$values[$item]        = round($values[$item]*1024*1024);
			}
		}
		         
        if ($values['allow_social_tool'] == 'true') {
            $values['allow_message_tool'] = 'true';
        }
        
      
        // The first step is to set all the variables that have type=checkbox of the category
        // to false as the checkbox that is unchecked is not in the $_POST data and can
        // therefore not be set to false.
        // This, however, also means that if the process breaks on the third of five checkboxes, the others
        // will be set to false.
        
        //$r = api_set_settings_category($my_category, 'false', $_configuration['access_url'], array('checkbox', 'radio'));
                
        //This is a more accurate way of updating to false the checkboxes and radios the settings
        //var_dump($settings);exit;
        
        /*
        foreach ($values as $key => $value) {          
            if (in_array($key, $settings_to_avoid)) { continue; }            
            if ($key == 'search_field' or $key == 'submit_fixed_in_bottom') { continue; }
            $key = Database::escape_string($key);
            $sql = "UPDATE $table_settings_current SET selected_value = 'false' WHERE variable = '".$key."' AND access_url = ".intval($url_id)."  AND type IN ('checkbox', 'radio') ";            
            $res = Database::query($sql);      
        }*/
        
        foreach ($settings as $item) {     
            $key = $item['variable'];
            if (in_array($key, $settings_to_avoid)) { continue; }            
            if ($key == 'search_field' or $key == 'submit_fixed_in_bottom') { continue; }
            $key = Database::escape_string($key);
            $sql = "UPDATE $table_settings_current SET selected_value = 'false' WHERE variable = '".$key."' AND access_url = ".intval($url_id)."  AND type IN ('checkbox', 'radio') ";            
            $res = Database::query($sql);      
        }
        
        /*foreach($settings_to_avoid as $key => $value) {
            api_set_setting($key, $value, null, null, $_configuration['access_url']);    
        }*/
        
        // Save the settings.
        $keys = array();
               
        foreach ($values as $key => $value) {
            if (in_array($key, $settings_to_avoid)) { continue; }
            // Avoid form elements which have nothing to do with settings
            if ($key == 'search_field' or $key == 'submit_fixed_in_bottom') { continue; }
            
            // Treat gradebook values in separate function.
            //if (strpos($key, 'gradebook_score_display_custom_values') === false) {
                if (!is_array($value)) {
                    $old_value = api_get_setting($key);                    
                    switch ($key) {                        
                    	case 'header_extra_content':
                    		file_put_contents(api_get_path(SYS_PATH).api_get_home_path().'/header_extra_content.txt', $value);                    		
                    		$value = api_get_home_path().'/header_extra_content.txt';
                    		break;
                    	case 'footer_extra_content':
                    		file_put_contents(api_get_path(SYS_PATH).api_get_home_path().'/footer_extra_content.txt', $value);                    		
                    		$value = api_get_home_path().'/footer_extra_content.txt';
                    		break;
                        // URL validation for some settings.
                        case 'InstitutionUrl':
                        case 'course_validation_terms_and_conditions_url':
                            $value = trim(Security::remove_XSS($value));
                            if ($value != '') {
                                // Here we accept absolute URLs only.
                                if (strpos($value, '://') === false) {
                                    $value = 'http://'.$value;
                                }
                                if (!api_valid_url($value, true)) {
                                    // If the new (non-empty) URL value is invalid, then the old URL value stays.
                                    $value = $old_value;
                                }
                            }
                            // If the new URL value is empty, then it will be stored (i.e. the setting will be deleted).
                            break;

                        // Validation against e-mail address for some settings.
                        case 'emailAdministrator':
                            $value = trim(Security::remove_XSS($value));
                            if ($value != '' && !api_valid_email($value)) {
                                // If the new (non-empty) e-mail address is invalid, then the old e-mail address stays.
                                // If the new e-mail address is empty, then it will be stored (i.e. the setting will be deleted).
                                $value = $old_value;
                            }
                            break;
                    }
                    if ($old_value != $value) $keys[] = $key;                    
                    $result = api_set_setting($key, $value, null, null, $url_id);
                } else {                
                    $sql = "SELECT subkey FROM $table_settings_current WHERE variable = '$key'";
                    $res = Database::query($sql);	                    
                    while ($row_subkeys = Database::fetch_array($res)) {
                        // If subkey is changed:
                        if ((isset($value[$row_subkeys['subkey']]) && api_get_setting($key, $row_subkeys['subkey']) == 'false') ||
                            (!isset($value[$row_subkeys['subkey']]) && api_get_setting($key, $row_subkeys['subkey']) == 'true')) {
                            $keys[] = $key;
                            break;
                        }
                    }
                    foreach ($value as $subkey => $subvalue) {                        
                        $result = api_set_setting($key, 'true', $subkey, null, $url_id);	
                    }
                	
                }
        }

        // Add event configuration settings category to the system log.        
        $user_id = api_get_user_id();
        $category = $_GET['category'];
        event_system(LOG_CONFIGURATION_SETTINGS_CHANGE, LOG_CONFIGURATION_SETTINGS_CATEGORY, $category, api_get_utc_datetime(), $user_id);
        
        // Add event configuration settings variable to the system log.
        if (is_array($keys) && count($keys) > 0) {
            foreach ($keys as $variable) {
                if (in_array($key, $settings_to_avoid)) { continue; }
                event_system(LOG_CONFIGURATION_SETTINGS_CHANGE, LOG_CONFIGURATION_SETTINGS_VARIABLE, $variable, api_get_utc_datetime(), $user_id);
            }
        }
    }
}

$htmlHeadXtra[] = '<script>    
    var hide_icon = "'.api_get_path(WEB_IMG_PATH).'shared_setting_na.png";
    var show_icon = "'.api_get_path(WEB_IMG_PATH).'shared_setting.png";
    var url       = "'.api_get_path(WEB_AJAX_PATH).'admin.ajax.php?a=update_changeable_setting";
        
    $(function() {
        $(".share_this_setting").on("click", function() {
            var my_img = $(this).find("img");
            var link = $(this);
            $.ajax({
                url: url,
                data: { changeable:  $(this).attr("data_status"), id: $(this).attr("data_to_send") },
                success: function(data) {                
                    if (data == 1) {
                        if (link.attr("data_status") == 1) {
                            my_img.attr("src", show_icon);
                            link.attr("data_status", 0); 
                        } else {                                
                            my_img.attr("src", hide_icon);
                            link.attr("data_status", 1);                            
                        }                        
                    }
                }
            });
        });
    });
</script>';

// Including the header (banner).
Display :: display_header($tool_name);

// The action images.
$action_images['platform']      = 'platform.png';
$action_images['course']        = 'course.png';
$action_images['session']       = 'session.png';
$action_images['tools']         = 'tools.png';
$action_images['user']          = 'user.png';
$action_images['gradebook']     = 'gradebook.png';
$action_images['ldap']          = 'ldap.png';
$action_images['cas'] 	        = 'user_access.png';
$action_images['security']      = 'security.png';
$action_images['languages']     = 'languages.png';
$action_images['tuning']        = 'tuning.png';
$action_images['templates']     = 'template.png';
$action_images['search']        = 'search.png';
$action_images['editor']        = 'html_editor.png';
$action_images['timezones']     = 'timezone.png';
$action_images['extra']     	= 'wizard.png';
$action_images['tracking']     	= 'statistics.png';
$action_images['gradebook']     = 'gradebook.png';
$action_images['search']        = 'search.png';
$action_images['stylesheets']   = 'stylesheets.png';
$action_images['templates']     = 'template.png';
$action_images['plugins']       = 'plugins.png';
$action_images['shibboleth']    = 'shibboleth.png';
$action_images['facebook']      = 'facebook.png';

// Grabbing the categories.
//$resultcategories = api_get_settings_categories(array('stylesheets', 'Plugins', 'Templates', 'Search'));

$action_array = array();
$resultcategories = array();

$resultcategories[] = array('category' => 'Platform');
$resultcategories[] = array('category' => 'Course');
$resultcategories[] = array('category' => 'Session');
$resultcategories[] = array('category' => 'Languages');
$resultcategories[] = array('category' => 'User');
$resultcategories[] = array('category' => 'Tools');
$resultcategories[] = array('category' => 'Editor');
$resultcategories[] = array('category' => 'Security');
$resultcategories[] = array('category' => 'Tuning');
$resultcategories[] = array('category' => 'Gradebook');
$resultcategories[] = array('category' => 'Timezones');
$resultcategories[] = array('category' => 'Tracking');
$resultcategories[] = array('category' => 'Search');
$resultcategories[] = array('category' => 'Stylesheets');
$resultcategories[] = array('category' => 'Templates');
$resultcategories[] = array('category' => 'Plugins');
$resultcategories[] = array('category' => 'LDAP');
$resultcategories[] = array('category' => 'CAS');
$resultcategories[] = array('category' => 'Shibboleth');
$resultcategories[] = array('category' => 'Facebook');


foreach ($resultcategories as $row) {
    $url = array();    
    $url['url'] = api_get_self()."?category=".$row['category'];
    $url['content'] = Display::return_icon($action_images[strtolower($row['category'])], api_ucfirst(get_lang($row['category'])),'',ICON_SIZE_MEDIUM);    
    if (strtolower($row['category']) == strtolower($_GET['category'])) {
        $url['active'] = true;
    }
    $action_array[] = $url;
}

echo Display::actions($action_array);

echo '<br />';

echo $form_search_html;

if ($watermark_deleted) {    
    Display :: display_normal_message(get_lang('FileDeleted'));
}

// Displaying the message that the settings have been stored.
if (isset($form) && $form->validate()) {
    
    Display::display_confirmation_message(get_lang('SettingsStored'));
    if (is_array($message)) {
        foreach($message as $type => $content) {
            foreach($content as $msg) {
                echo Display::return_message($msg, $type);
            }
        }
    }
}

if (!empty($_GET['category'])) {
    switch ($_GET['category']) {
        case 'Regions':
            handle_regions();
            break;
        case 'Plugins':
            // Displaying the extensions: Plugins.
            // This will be available to all the sites (access_urls).
            if (isset($_POST['submit_dashboard_plugins'])) {
                $affected_rows = DashboardManager::store_dashboard_plugins($_POST);
                if ($affected_rows) {
                    // add event to system log                    
                    $user_id = api_get_user_id();
                    $category = $_GET['category'];
                    event_system(LOG_CONFIGURATION_SETTINGS_CHANGE, LOG_CONFIGURATION_SETTINGS_CATEGORY, $category, api_get_utc_datetime(), $user_id);
                    Display :: display_confirmation_message(get_lang('DashboardPluginsHaveBeenUpdatedSucesslly'));
                }
            }            
            echo '<script>                    
                $(function(){
                    $("#tabs").tabs();
                });
                </script>';
            echo '<div id="tabs">';
                echo '<ul>';
                echo '<li><a href="#tabs-1">'.get_lang('Plugins').'</a></li>';
                echo '<li><a href="#tabs-2">'.get_lang('DashboardPlugins').'</a></li>';
                echo '<li><a href="#tabs-3">'.get_lang('ConfigureExtensions').'</a></li>';
                echo '</ul>';

                echo '<div id="tabs-1">';
                handle_plugins();
                echo '</div>';

                echo '<div id="tabs-2">';
                DashboardManager::handle_dashboard_plugins();
                echo '</div>';

                echo '<div id="tabs-3">';
                handle_extensions();
                echo '</div>';            
            echo '</div>';            
            break;
        case 'Stylesheets':        
            // Displaying the extensions: Stylesheets.
            handle_stylesheets();
            break;
        case 'Search':
            handle_search();
            break;
        case 'Templates':
            handle_templates();
            break;
        case 'search_setting':            
            search_setting($_REQUEST['search_field']);
            if (isset($_REQUEST['search_field'])) {                
                $form->display();    
            }            
            break;
        default:
            if (isset($form))
                $form->display();
    }
}

/* FOOTER */
Display :: display_footer();