<?php
/**
* Admin AJAX Controller for TablePress with functionality for the AJAX backend
*
* @package TablePress
* @subpackage Controllers
* @author Tobias Bäthge
* @since 1.0.0
*/
// Prohibit direct script loading
defined( 'ABSPATH' ) || die( 'No direct script access allowed!' );
/**
* Admin AJAX Controller class, extends Base Controller Class
* @package TablePress
* @subpackage Controllers
* @author Tobias Bäthge
* @since 1.0.0
*/
class TablePress_Admin_AJAX_Controller extends TablePress_Controller {
/* protected $table = array();
protected $known_ranges = array();
*/
/**
* Initiate Admin AJAX functionality
*
* @since 1.0.0
*/
public function __construct() {
ob_start(); // buffer all outputs, to prevent errors/warnings being printed that make the JSON invalid
parent::__construct();
$ajax_actions = array( 'hide_message', 'save_table', 'preview_table' );
foreach ( $ajax_actions as $action ) {
add_action( "wp_ajax_tablepress_{$action}", array( $this, "ajax_action_{$action}" ) );
}
}
/**
* Hide a header message on an admin screen
*
* @since 1.0.0
*/
public function ajax_action_hide_message() {
if ( empty( $_GET['item'] ) )
wp_die( '0' );
else
$message_item = $_GET['item'];
TablePress::check_nonce( 'hide_message', $message_item, '_wpnonce', true );
if ( ! current_user_can( 'tablepress_list_tables' ) )
wp_die( '-1' );
$updated_options = array( "message_{$message_item}" => false );
if ( 'plugin_update' == $message_item )
$updated_options['message_plugin_update_content'] = '';
$this->model_options->update( $updated_options );
wp_die( '1' );
}
/**
* Save the table after the "Save Changes" button on the "Edit" screen has been clicked
*
* @since 1.0.0
*/
public function ajax_action_save_table() {
if ( empty( $_POST['tablepress'] ) || empty( $_POST['tablepress']['id'] ) )
wp_die( '-1' );
else
$edit_table = stripslashes_deep( $_POST['tablepress'] );
// check to see if the submitted nonce matches with the generated nonce we created earlier, dies -1 on fail
TablePress::check_nonce( 'edit', $edit_table['id'], '_ajax_nonce', true );
// ignore the request if the current user doesn't have sufficient permissions
if ( ! current_user_can( 'tablepress_edit_table', $edit_table['id'] ) )
wp_die( '-1' );
// default response data:
$success = false;
$message = 'error_save';
do { // to be able to "break;" (allows for better readable code)
// Load existing table from DB
$existing_table = $this->model_table->load( $edit_table['id'] );
if ( false === $existing_table ) // maybe somehow load a new table here? ($this->model_table->get_table_template())?
break;
// Check and convert data that was transmitted as JSON
if ( empty( $edit_table['data'] )
|| empty( $edit_table['options'] )
|| empty( $edit_table['visibility'] ) )
break;
$edit_table['data'] = json_decode( $edit_table['data'], true );
$edit_table['options'] = json_decode( $edit_table['options'], true );
$edit_table['visibility'] = json_decode( $edit_table['visibility'], true );
// Check consistency of new table, and then merge with existing table
$table = $this->model_table->prepare_table( $existing_table, $edit_table, true, true );
if ( false === $table )
break;
// DataTables Custom Commands can only be edit by trusted users
if ( ! current_user_can( 'unfiltered_html' ) )
$table['options']['datatables_custom_commands'] = $existing_table['options']['datatables_custom_commands'];
// Save updated table
$saved = $this->model_table->save( $table );
if ( false === $saved )
break;
// at this point, the table was saved successfully, possible ID change remains
$success = true;
$message = 'success_save';
// Check if ID change is desired
if ( $table['id'] === $table['new_id'] ) // if not, we are done
break;
// Change table ID
if ( current_user_can( 'tablepress_edit_table_id', $table['id'] ) )
$id_changed = $this->model_table->change_table_id( $table['id'], $table['new_id'] );
else
$id_changed = false;
if ( $id_changed ) {
$message = 'success_save_success_id_change';
$table['id'] = $table['new_id'];
} else {
$message = 'success_save_error_id_change';
}
} while ( false ); // do-while-loop through this exactly once, to be able to "break;" early
// Generate the response
$response = array( // common for all responses
'success' => $success,
'message' => $message
);
if ( $success ) {
$response['table_id'] = $table['id'];
$response['new_edit_nonce'] = wp_create_nonce( TablePress::nonce( 'edit', $table['id'] ) );
$response['new_preview_nonce'] = wp_create_nonce( TablePress::nonce( 'preview_table', $table['id'] ) );
$response['last_modified'] = TablePress::format_datetime( $table['last_modified'] );
$response['last_editor'] = TablePress::get_user_display_name( $table['options']['last_editor'] );
}
// Send the response
$response['output_buffer'] = ob_get_clean(); // buffer all outputs, to prevent errors/warnings being printed that make the JSON invalid
wp_send_json( $response );
}
/**
* Return the live preview data of table that has non-saved changes
*
* @since 1.0.0
*/
public function ajax_action_preview_table() {
if ( empty( $_POST['tablepress'] ) || empty( $_POST['tablepress']['id'] ) )
wp_die( '-1' );
else
$preview_table = stripslashes_deep( $_POST['tablepress'] );
// check to see if the submitted nonce matches with the generated nonce we created earlier, dies -1 on fail
TablePress::check_nonce( 'preview_table', $preview_table['id'], '_ajax_nonce', true );
// ignore the request if the current user doesn't have sufficient permissions
if ( ! current_user_can( 'tablepress_preview_table', $preview_table['id'] ) )
wp_die( '-1' );
// default response data:
$success = false;
do { // to be able to "break;" (allows for better readable code)
// Load existing table from DB
$existing_table = $this->model_table->load( $preview_table['id'] );
if ( false === $existing_table ) // maybe somehow load a new table here? ($this->model_table->get_table_template())?
break;
// Check and convert data that was transmitted as JSON
if ( empty( $preview_table['data'] )
|| empty( $preview_table['options'] )
|| empty( $preview_table['visibility'] ) )
break;
$preview_table['data'] = json_decode( $preview_table['data'], true );
$preview_table['options'] = json_decode( $preview_table['options'], true );
$preview_table['visibility'] = json_decode( $preview_table['visibility'], true );
// Check consistency of new table, and then merge with existing table
$table = $this->model_table->prepare_table( $existing_table, $preview_table, true, true );
if ( false === $table )
break;
// DataTables Custom Commands can only be edit by trusted users
if ( ! current_user_can( 'unfiltered_html' ) )
$table['options']['datatables_custom_commands'] = $existing_table['options']['datatables_custom_commands'];
// If the ID has changed, and the new ID is valid, render with the new ID (important e.g. for CSS classes/HTML ID)
if ( $table['id'] !== $table['new_id'] && 0 === preg_match( '/[^a-zA-Z0-9_-]/', $table['new_id'] ) )
$table['id'] = $table['new_id'];
// at this point, the table data is valid and can be rendered
$success = true;
} while ( false ); // do-while-loop through this exactly once, to be able to "break;" early
if ( $success ) {
// Create a render class instance
$_render = TablePress::load_class( 'TablePress_Render', 'class-render.php', 'classes' );
// Merge desired options with default render options (as not all of them are stored in the table options, but are just Shortcode parameters)
$render_options = shortcode_atts( $_render->get_default_render_options(), $table['options'] );
$_render->set_input( $table, $render_options );
$head_html = '<style type="text/css">body{margin:10px;}</style>';
$head_html .= $_render->get_preview_css();
// Add "Custom CSS"
if ( $this->model_options->get( 'use_custom_css_file' ) ) {
$custom_css = $this->model_options->load_custom_css_from_file( 'normal' );
// fall back to "Custom CSS" in options, if it could not be retrieved from file
if ( false === $custom_css )
$custom_css = $this->model_options->get( 'custom_css' );
} else {
// get "Custom CSS" from options
$custom_css = $this->model_options->get( 'custom_css' );
}
if ( ! empty( $custom_css ) )
$head_html .= "<style type=\"text/css\">\n{$custom_css}\n</style>\n";
$body_html = '<div id="tablepress-page"><p>'
. __( 'This is a preview of your table.', 'tablepress' ) . ' '
. __( 'Because of CSS styling, the table might look different on your page!', 'tablepress' ) . ' '
. __( 'The features of the DataTables JavaScript library are also not visible in this preview!', 'tablepress' ) . '<br />'
. sprintf( __( 'To insert the table into a page, post, or text widget, copy the Shortcode %s and paste it into the editor.', 'tablepress' ), '<input type="text" class="table-shortcode table-shortcode-inline" value="[' . TablePress::$shortcode . ' id=' . esc_attr( $table['id'] ) . ' /]" readonly="readonly" />' )
. '</p>' . $_render->get_output() . '</div>';
} else {
$head_html = '';
$body_html = __( 'The preview could not be loaded.', 'tablepress' );
}
// Generate the response
$response = array(
'success' => $success,
'head_html' => $head_html,
'body_html' => $body_html
);
// Send the response
$response['output_buffer'] = ob_get_clean(); // buffer all outputs, to prevent errors/warnings being printed that make the JSON invalid
wp_send_json( $response );
}
} // class TablePress_Admin_AJAX_Controller