<?php
class ImageGrabber {
    private $use_proxy = FALSE;
    private $proxy;
    private $proxy_username;
    private $proxy_password;
    public function __construct() {
        register_activation_hook(__FILE__, array(&$this, 'activate'));
        add_action('admin_menu', array(&$this, 'adminMenu'));
        add_filter("media_upload_tabs", array(&$this, "build_tab"));
        add_action("media_upload_ImageGrabber", array(&$this, "menu_handle"));
        $this->use_proxy = (bool)get_option('image-grab.use_proxy');
        $this->proxy = get_option('image-grab.proxy_host') . ':' . (int)get_option('image-grab.proxy_port');
        $this->proxy_username = get_option('image-grab.proxy_username');
        $this->proxy_password = get_option('image-grab.proxy_password');
        add_action('admin_enqueue_scripts', array(&$this, 'image_grabber_style'));
        add_action('wp_ajax_add_category', array(&$this, 'add_category_callback'));
    }
    function image_grabber_style() {
        wp_enqueue_style('style_css', plugin_dir_url(__FILE__) . 'style.css');
    }
    function add_category_callback() {
        $action = $_POST['action'];
        $taxonomy = get_taxonomy(substr($action, 4));
        check_ajax_referer($action, '_ajax_nonce-add-' . $taxonomy->name);
        if (!current_user_can($taxonomy->cap->edit_terms)) wp_die(-1);
        $names = explode(',', $_POST['new' . $taxonomy->name]);
        $parent = isset($_POST['new' . $taxonomy->name . '_parent']) ? (int)$_POST['new' . $taxonomy->name . '_parent'] : 0;
        if (0 > $parent) $parent = 0;
        if ($taxonomy->name == 'category') $post_category = isset($_POST['post_category']) ? (array)$_POST['post_category'] : array();
        else $post_category = (isset($_POST['tax_input']) && isset($_POST['tax_input'][$taxonomy->name])) ? (array)$_POST['tax_input'][$taxonomy->name] : array();
        $checked_categories = array_map('absint', (array)$post_category);
        foreach ($names as $cat_name) {
            $cat_name = trim($cat_name);
            $category_nicename = sanitize_title($cat_name);
            if ('' === $category_nicename) continue;
            if (!$cat_id = term_exists($cat_name, $taxonomy->name, $parent)) $cat_id = wp_insert_term($cat_name, $taxonomy->name, array('parent' => $parent));
            if (is_wp_error($cat_id)) continue;
            elseif (is_array($cat_id)) $cat_id = $cat_id['term_id'];
            $checked_categories[] = $cat_id;
            if ($parent) continue;
        }
        if ($parent) {
            $parent = get_term($parent, $taxonomy->name);
            $term_id = $parent->term_id;
            while ($parent->parent) {
                $parent = get_term($parent->parent, $taxonomy->name);
                if (is_wp_error($parent)) break;
                $term_id = $parent->term_id;
            }
        }
        $combo_category = $this->_buildCategoryOptionList('post_category[]', $checked_categories, 'post_category', get_option('image-grab.multiple_category'));
        ob_start();
        wp_dropdown_categories(array('taxonomy' => $taxonomy->name, 'hide_empty' => 0, 'name' => 'new' . $taxonomy->name . '_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $taxonomy->labels->parent_item . ' &mdash;'));
        $combo_add_category = ob_get_contents();
        ob_end_clean();
        $response = '<div id="response">';
        $response.= '<div id="category_list">' . $combo_category . '</div>';
        $response.= '<div id="new_category_list">' . $combo_add_category . '</div>';
        $response.= '</div>';
        echo $response;
        die();
    }
    function activate() {
        add_option('image-grab.default_category', serialize(array(0)));
        add_option('image-grab.multiple_category', '0');
        add_option('image-grab.schedule_interval', '60');
        add_option('image-grab.content_desc', "New Wallpaper {TITLE} Dimesion: {DIMENSION} File Size: {FILE_SIZE}");
    }
    private function array_insert(&$array, $insert, $position) {
        settype($array, "array");
        settype($insert, "array");
        settype($position, "int");
        if ($position == 0) {
            $array = array_merge($insert, $array);
        } else {
            if ($position >= (count($array) - 1)) {
                $array = array_merge($array, $insert);
            } else {
                $head = array_slice($array, 0, $position);
                $tail = array_slice($array, $position);
                $array = array_merge($head, $insert, $tail);
            }
        }
        return $array;
    }
    public function build_tab($tabs) {
        $newtab = array('ImageGrabber' => __('Grab Images', 'ImageGrabber'));
        return $this->array_insert($tabs, $newtab, 2);
    }
    public function menu_handle() {
        return wp_iframe(array(&$this, "media_process"));
    }
    private function fetch_image($url) {
        if (function_exists("curl_init")) {
            return $this->curl_fetch_image($url);
        } elseif (ini_get("allow_url_fopen")) {
            return $this->fopen_fetch_image($url);
        }
    }
    private function curl_fetch_image($url) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $image = curl_exec($ch);
        curl_close($ch);
        return $image;
    }
    private function fopen_fetch_image($url) {
        $image = file_get_contents($url, FALSE, $context);
        return $image;
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