<?php
/*
Plugin Name: Material Design Icons
Plugin URI: http://braginteractive.com
Description: Use the Material Design icon set within WordPress. Icons can be inserted using either HTML or a shortcode.
Version: 0.0.5
Author: Brad Williams
Author URI: http://braginteractive.com
Author Email: info@braginteractive.com
Credits:
    Copyright (c) 2014, Austin Andrews (http://materialdesignicons.com/),
    with Reserved Font Name Material Design Icons.
    Copyright (c) 2014, Google (http://www.google.com/design/)
    uses the license at https://github.com/google/material-design-icons/blob/master/LICENSE

License:

  Copyright (C) 2015  Brad Williams

    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 3 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, see <http://www.gnu.org/licenses/>.

*/

class MaterialDesignIcons {
    private static $instance;
    const VERSION = '0.0.5';

    private static function has_instance() {
        return isset(self::$instance) && self::$instance != null;
    }

    public static function get_instance() {
        if (!self::has_instance())
            self::$instance = new MaterialDesignIcons;
        return self::$instance;
    }

    public static function setup() {
        self::get_instance();
    }

    protected function __construct() {
        if (!self::has_instance()) {
            add_action('init', array(&$this, 'init'));
        }
    }

    public function init() {
        add_action('wp_enqueue_scripts', array(&$this, 'register_plugin_styles'));
        add_action( 'admin_enqueue_scripts', array( $this, 'register_plugin_styles' ) );
        add_shortcode('mdi-icon', array($this, 'setup_shortcode'));
        add_filter('widget_text', 'do_shortcode');
        add_action( 'admin_init', array( $this, 'add_tinymce_hooks' ) );
    }

    public function add_tinymce_hooks() {
        // check user permissions
        if ( !current_user_can( 'edit_posts' ) && !current_user_can( 'edit_pages' ) ) {
            return;
        }
        // check if WYSIWYG is enabled
        if ( 'true' == get_user_option( 'rich_editing' ) ) {
            add_filter( 'mce_external_plugins', array( $this, 'register_tinymce_plugin' ) );
            add_filter( 'mce_buttons', array( $this, 'add_tinymce_buttons' ) );

        }
    }

    public function register_plugin_styles() {
        global $wp_styles;
        wp_enqueue_style('material-design-icon-styles', plugins_url('bower_components/mdi/css/materialdesignicons.min.css', __FILE__), array(), self::VERSION, 'all');
        wp_enqueue_style('material-design-icon-styles-admin', plugins_url('css/admin-styles.css', __FILE__), array(), self::VERSION, 'all');
        wp_enqueue_style('material-design-icon-styles-size', plugins_url('css/size-styles.css', __FILE__), array(), self::VERSION, 'all');
    }

    public function setup_shortcode($params) {
        extract(shortcode_atts(array(
                    'name'  => '',
                    'color'  => '',
                    'size'  => '',
                ), $params));

        
        $size = $size ? 'mdi-' . $size : '';
        $color = $color ? 'style="color:' .$color .';' : '';

        return '<i class="mdi mdi-'. $params['name'] . ' ' . $size .'" ' . $color . '">&nbsp;</i>';
    }

    // Declare script for new button
    public function register_tinymce_plugin( $plugin_array ) {
        $plugin_array['mdi_icons'] = plugins_url( 'js/mdi-icons.js', __FILE__ );
        return $plugin_array;
    }

    // Register new button in the editor
    public function add_tinymce_buttons( $buttons ) {
        array_push( $buttons, 'mdi_icons' );
        return $buttons;
    }
}

MaterialDesignIcons::setup();