options-framework.php

<?php
/*
Plugin Name: Options Framework
Plugin URI: http://www.wptheming.com
Description: A framework for building theme options.
Version: 1.3
Author: Devin Price
Author URI: http://www.wptheming.com
License: GPLv2
*/

/*
This program 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 2
of the License, or (at your option) any later version.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

/* Basic plugin definitions */

define('OPTIONS_FRAMEWORK_VERSION', '1.3');
define('OPTIONS_FRAMEWORK_URL', plugin_dir_url( __FILE__ ));

load_plugin_textdomain( 'optionsframework', false, dirname( plugin_basename( __FILE__ ) ) . '/lang/' );

/* Make sure we don't expose any info if called directly */

if ( !function_exists( 'add_action' ) ) {
	echo "Hi there!  I'm just a little plugin, don't mind me.";
	exit;
}

/* If the user can't edit theme options, no use running this plugin */

add_action('init', 'optionsframework_rolescheck' );

function optionsframework_rolescheck() {
	if ( current_user_can( 'edit_theme_options' ) ) {
		$options =& _optionsframework_options();
		if ( $options ) {
			// If the user can edit theme options, let the fun begin!
			add_action( 'admin_menu', 'optionsframework_add_page');
			add_action( 'admin_init', 'optionsframework_init' );
			add_action( 'admin_init', 'optionsframework_mlu_init' );
			add_action( 'wp_before_admin_bar_render', 'optionsframework_adminbar' );
		}
		else {
			// Display a notice if options aren't present in the theme
			add_action('admin_notices', 'optionsframework_admin_notice');
			add_action('admin_init', 'optionsframework_nag_ignore');
		}
	}
}

function optionsframework_admin_notice() {
	global $pagenow;
	if ( !is_multisite() && ( $pagenow == 'plugins.php' ||  $pagenow == 'themes.php') ) {
		global $current_user ;
		$user_id = $current_user->ID;
		if ( ! get_user_meta($user_id, 'optionsframework_ignore_notice') ) {
			echo '<div class="updated optionsframework_setup_nag"><p>';
			printf( __('Your current theme does not have support for the Options Framework plugin.  <a href="%1$s" target="_blank">Learn More</a> | <a href="%2$s">Hide Notice</a>', 'optionsframework'), 'http://wptheming.com/options-framework-plugin', '?optionsframework_nag_ignore=0');
			echo "</p></div>";
		}
	}
}

function optionsframework_nag_ignore() {
	global $current_user;
	$user_id = $current_user->ID;
	if ( isset($_GET['optionsframework_nag_ignore']) && '0' == $_GET['optionsframework_nag_ignore'] ) {
		add_user_meta($user_id, 'optionsframework_ignore_notice', 'true', true);
	}
}

/* Register plugin activation hooks */

register_activation_hook(__FILE__,'optionsframework_activation_hook');

function optionsframework_activation_hook() {
	register_uninstall_hook( __FILE__, 'optionsframework_delete_options' );
}

/* When uninstalled, deletes options */

register_uninstall_hook( __FILE__, 'optionsframework_delete_options' );

function optionsframework_delete_options() {

	$optionsframework_settings = get_option('optionsframework');

	// Each theme saves its data in a seperate option, which all gets deleted
	$knownoptions = $optionsframework_settings['knownoptions'];
	if ($knownoptions) {
		foreach ($knownoptions as $key) {
			delete_option($key);
		}
	}
	delete_option('optionsframework');
	delete_user_meta($user_id, 'optionsframework_ignore_notice', 'true');
}

/* Loads the file for option sanitization */

add_action('init', 'optionsframework_load_sanitization' );

function optionsframework_load_sanitization() {
	require_once dirname( __FILE__ ) . '/options-sanitize.php';
}

/*
 * The optionsframework_init loads all the required files and registers the settings.
 *
 * Read more about the Settings API in the WordPress codex:
 * http://codex.wordpress.org/Settings_API
 *
 * The theme options are saved using a unique option id in the database.  Developers
 * traditionally set the option id via in theme using the function
 * optionsframework_option_name, but it can also be set using a hook of the same name.
 *
 * If a theme developer doesn't explictly set the unique option id using one of those
 * functions it will be set by default to: optionsframework_[the theme name]
 *
 */

function optionsframework_init() {

	// Include the required files
	require_once dirname( __FILE__ ) . '/options-interface.php';
	require_once dirname( __FILE__ ) . '/options-medialibrary-uploader.php';

	// Optionally Loads the options file from the theme
	$location = apply_filters( 'options_framework_location', array('options.php') );
	$optionsfile = locate_template( $location );

	// Load settings
	$optionsframework_settings = get_option( 'optionsframework' );

	// Updates the unique option id in the database if it has changed
	if ( function_exists( 'optionsframework_option_name' ) ) {
		optionsframework_option_name();
	}
	elseif ( has_action( 'optionsframework_option_name' ) ) {
		do_action( 'optionsframework_option_name' );
	}
	// If the developer hasn't explicitly set an option id, we'll use a default
	else {
		$default_themename = get_option( 'stylesheet' );
		$default_themename = preg_replace("/\W/", "_", strtolower($default_themename) );
		$default_themename = 'optionsframework_' . $default_themename;
		if ( isset( $optionsframework_settings['id'] ) ) {
			if ( $optionsframework_settings['id'] == $default_themename ) {
				// All good, using default theme id
			} else {
				$optionsframework_settings['id'] = $default_themename;
				update_option( 'optionsframework', $optionsframework_settings );
			}
		}
		else {
			$optionsframework_settings['id'] = $default_themename;
			update_option( 'optionsframework', $optionsframework_settings );
		}
	}

	// If the option has no saved data, load the defaults
	if ( ! get_option( $optionsframework_settings['id'] ) ) {
		optionsframework_setdefaults();
	}

	// Registers the settings fields and callback
	register_setting( 'optionsframework', $optionsframework_settings['id'], 'optionsframework_validate' );
	// Change the capability required to save the 'optionsframework' options group.
	add_filter( 'option_page_capability_optionsframework', 'optionsframework_page_capability' );
}

/**
 * Ensures that a user with the 'edit_theme_options' capability can actually set the options
 * See: http://core.trac.wordpress.org/ticket/14365
 *
 * @param string $capability The capability used for the page, which is manage_options by default.
 * @return string The capability to actually use.
 */

function optionsframework_page_capability( $capability ) {
	return 'edit_theme_options';
}


/*
 * Adds default options to the database if they aren't already present.
 * May update this later to load only on plugin activation, or theme
 * activation since most people won't be editing the options.php
 * on a regular basis.
 *
 * http://codex.wordpress.org/Function_Reference/add_option
 *
 */

function optionsframework_setdefaults() {

	$optionsframework_settings = get_option('optionsframework');

	// Gets the unique option id
	$option_name = $optionsframework_settings['id'];

	/*
	 * Each theme will hopefully have a unique id, and all of its options saved
	 * as a separate option set.  We need to track all of these option sets so
	 * it can be easily deleted if someone wishes to remove the plugin and
	 * its associated data.  No need to clutter the database.
	 *
	 */

	if ( isset($optionsframework_settings['knownoptions']) ) {
		$knownoptions =  $optionsframework_settings['knownoptions'];
		if ( !in_array($option_name, $knownoptions) ) {
			array_push( $knownoptions, $option_name );
			$optionsframework_settings['knownoptions'] = $knownoptions;
			update_option('optionsframework', $optionsframework_settings);
		}
	} else {
		$newoptionname = array($option_name);
		$optionsframework_settings['knownoptions'] = $newoptionname;
		update_option('optionsframework', $optionsframework_settings);
	}

	// Gets the default options data from the array in options.php
	$options =& _optionsframework_options();

	// If the options haven't been added to the database yet, they are added now
	$values = of_get_default_values();

	if ( isset($values) ) {
		add_option( $option_name, $values ); // Add option with default settings
	}
}

/* Add a subpage called "Theme Options" to the appearance menu. */

if ( !function_exists( 'optionsframework_add_page' ) ) {

	function optionsframework_add_page() {
		$of_page = add_theme_page(__('Theme Options', 'optionsframework'), __('Theme Options', 'optionsframework'), 'edit_theme_options', 'options-framework','optionsframework_page');

		// Load the required CSS and javscript
		add_action('admin_enqueue_scripts', 'optionsframework_load_scripts');
		add_action( 'admin_print_styles-' . $of_page, 'optionsframework_load_styles' );
	}

}

/* Loads the CSS */

function optionsframework_load_styles() {
	wp_enqueue_style('optionsframework', OPTIONS_FRAMEWORK_URL.'css/optionsframework.css');
	wp_enqueue_style('color-picker', OPTIONS_FRAMEWORK_URL.'css/colorpicker.css');
}

/* Loads the javascript */

function optionsframework_load_scripts($hook) {

	if ( 'appearance_page_options-framework' != $hook )
        return;

	// Enqueued scripts
	wp_enqueue_script('jquery-ui-core');
	wp_enqueue_script('color-picker', OPTIONS_FRAMEWORK_URL .'js/colorpicker.js', array('jquery'));
	wp_enqueue_script('options-custom', OPTIONS_FRAMEWORK_URL .'js/options-custom.js', array('jquery'));

	// Inline scripts from options-interface.php
	add_action('admin_head', 'of_admin_head');
}

function of_admin_head() {

	// Hook to add custom scripts
	do_action( 'optionsframework_custom_scripts' );
}

/*
 * Builds out the options panel.
 *
 * If we were using the Settings API as it was likely intended we would use
 * do_settings_sections here.  But as we don't want the settings wrapped in a table,
 * we'll call our own custom optionsframework_fields.  See options-interface.php
 * for specifics on how each individual field is generated.
 *
 * Nonces are provided using the settings_fields()
 *
 */

if ( !function_exists( 'optionsframework_page' ) ) {
	function optionsframework_page() {
		settings_errors();
?>

	<div id="optionsframework-wrap" class="wrap">
    <?php screen_icon( 'themes' ); ?>
    <h2 class="nav-tab-wrapper">
        <?php echo optionsframework_tabs(); ?>
    </h2>

    <div id="optionsframework-metabox" class="metabox-holder">
	    <div id="optionsframework" class="postbox">
			<form action="options.php" method="post">
			<?php settings_fields('optionsframework'); ?>
			<?php optionsframework_fields(); /* Settings */ ?>
			<div id="optionsframework-submit">
				<input type="submit" class="button-primary" name="update" value="<?php esc_attr_e( 'Save Options', 'optionsframework' ); ?>" />
				<input type="submit" class="reset-button button-secondary" name="reset" value="<?php esc_attr_e( 'Restore Defaults', 'optionsframework' ); ?>" onclick="return confirm( '<?php print esc_js( __( 'Click OK to reset. Any theme settings will be lost!', 'optionsframework' ) ); ?>' );" />
				<div class="clear"></div>
			</div>
			</form>
		</div> <!-- / #container -->
	</div>
	<?php do_action('optionsframework_after'); ?>
	</div> <!-- / .wrap -->
	
<?php
	}
}

/**
 * Validate Options.
 *
 * This runs after the submit/reset button has been clicked and
 * validates the inputs.
 *
 * @uses $_POST['reset'] to restore default options
 */
function optionsframework_validate( $input ) {

	/*
	 * Restore Defaults.
	 *
	 * In the event that the user clicked the "Restore Defaults"
	 * button, the options defined in the theme's options.php
	 * file will be added to the option for the active theme.
	 */

	if ( isset( $_POST['reset'] ) ) {
		add_settings_error( 'options-framework', 'restore_defaults', __( 'Default options restored.', 'optionsframework' ), 'updated fade' );
		return of_get_default_values();
	}
	
	/*
	 * Update Settings
	 *
	 * This used to check for $_POST['update'], but has been updated
	 * to be compatible with the theme customizer introduced in WordPress 3.4
	 */
	 
	$clean = array();
	$options =& _optionsframework_options();
	foreach ( $options as $option ) {

		if ( ! isset( $option['id'] ) ) {
			continue;
		}

		if ( ! isset( $option['type'] ) ) {
			continue;
		}

		$id = preg_replace( '/[^a-zA-Z0-9._\-]/', '', strtolower( $option['id'] ) );

		// Set checkbox to false if it wasn't sent in the $_POST
		if ( 'checkbox' == $option['type'] && ! isset( $input[$id] ) ) {
			$input[$id] = false;
		}

		// Set each item in the multicheck to false if it wasn't sent in the $_POST
		if ( 'multicheck' == $option['type'] && ! isset( $input[$id] ) ) {
			foreach ( $option['options'] as $key => $value ) {
				$input[$id][$key] = false;
			}
		}

		// For a value to be submitted to database it must pass through a sanitization filter
		if ( has_filter( 'of_sanitize_' . $option['type'] ) ) {
			$clean[$id] = apply_filters( 'of_sanitize_' . $option['type'], $input[$id], $option );
		}
	}

	add_settings_error( 'options-framework', 'save_options', __( 'Options saved.', 'optionsframework' ), 'updated fade' );
	
	return $clean;

}

/**
 * Format Configuration Array.
 *
 * Get an array of all default values as set in
 * options.php. The 'id','std' and 'type' keys need
 * to be defined in the configuration array. In the
 * event that these keys are not present the option
 * will not be included in this function's output.
 *
 * @return    array     Rey-keyed options configuration array.
 *
 * @access    private
 */

function of_get_default_values() {
	$output = array();
	$config =& _optionsframework_options();
	foreach ( (array) $config as $option ) {
		if ( ! isset( $option['id'] ) ) {
			continue;
		}
		if ( ! isset( $option['std'] ) ) {
			continue;
		}
		if ( ! isset( $option['type'] ) ) {
			continue;
		}
		if ( has_filter( 'of_sanitize_' . $option['type'] ) ) {
			$output[$option['id']] = apply_filters( 'of_sanitize_' . $option['type'], $option['std'], $option );
		}
	}
	return $output;
}

/**
 * Add Theme Options menu item to Admin Bar.
 */

function optionsframework_adminbar() {

	global $wp_admin_bar;

	$wp_admin_bar->add_menu( array(
			'parent' => 'appearance',
			'id' => 'of_theme_options',
			'title' => __( 'Theme Options', 'optionsframework' ),
			'href' => admin_url( 'themes.php?page=options-framework' )
		));
}

if ( ! function_exists( 'of_get_option' ) ) {

	/**
	 * Get Option.
	 *
	 * Helper function to return the theme option value.
	 * If no value has been saved, it returns $default.
	 * Needed because options are saved as serialized strings.
	 */

	function of_get_option( $name, $default = false ) {
		$config = get_option( 'optionsframework' );

		if ( ! isset( $config['id'] ) ) {
			return $default;
		}

		$options = get_option( $config['id'] );

		if ( isset( $options[$name] ) ) {
			return $options[$name];
		}

		return $default;
	}
}

/**
 * Wrapper for optionsframework_options()
 *
 * Allows for manipulating or setting options via 'of_options' filter
 * For example:
 *
 * <code>
 * add_filter('of_options', function($options) {
 *     $options[] = array(
 *         'name' => 'Input Text Mini',
 *         'desc' => 'A mini text input field.',
 *         'id' => 'example_text_mini',
 *         'std' => 'Default',
 *         'class' => 'mini',
 *         'type' => 'text'
 *     );
 *
 *     return $options;
 * });
 * </code>
 *
 * Also allows for setting options via a return statement in the
 * options.php file.  For example (in options.php):
 *
 * <code>
 * return array(...);
 * </code>
 *
 * @return array (by reference)
 */
function &_optionsframework_options() {
	static $options = null;

	if (!$options) {
		// Load options from options.php file (if it exists)
		$location = apply_filters( 'options_framework_location', array('options.php') );
		if ( $optionsfile = locate_template( $location ) ) {
			$maybe_options = require_once $optionsfile;
			if (is_array($maybe_options)) {
				$options = $maybe_options;
			} else if (function_exists('optionsframework_options')) {
					$options = optionsframework_options();
				}
		}

		// Allow setting/manipulating options via filters
		$options = apply_filters('of_options', $options);
	}

	return $options;
}