/**
 * Developer: My name
 * Date: 20/07/2016
 * Time: 11:08
 */

namespace AppHttpControllersApi;

use IlluminateHttpRequest;
use AppHttpControllersController;
use CarbonCarbon;



class WpBlogController extends Controller
{
    /*
     * Using Wordpress Rest API
     * http://v2.wp-api.org/
     *
     * Plugins to Install in Wordpress:
     * 1. https://wordpress.org/plugins/rest-api/
     * 2. https://wordpress.org/plugins/better-rest-api-featured-images/
     * 3. https://wordpress.org/plugins/wp-rest-api-pure-taxonomies/
     */

    const WP_USERNAME = "my_wp_username";
    const WP_PASSWORD = "my_wp_password";
    const WP_API_URL = "http://my.wp-blog.example/wp-json/wp/v2";


    public function getLatestThreePosts(){

        $curl = $this->getCurl();

        //set the right url to get only three posts
        curl_setopt($curl, CURLOPT_URL, self::WP_API_URL . "/posts?per_page=3&page=1");

        $raw_posts = curl_exec($curl) or abort(502); //bad gateway error if request fails

        //decode json and get the stdClass object
        $raw_posts = json_decode($raw_posts);


        $formatted_posts = [];

        foreach($raw_posts as $post){

            //some operations on the original html to get only the text
            $curpost = [
                "title" => trim(strip_tags($post->title->rendered)),
                "content" => trim(strip_tags($post->content->rendered)),
                "url" => $post->link,
                "date" => Carbon::parse($post->date)->formatLocalized('%d %B %Y')
            ];

            //abrreviate the post content.
            $curpost["abbr"] = substr($curpost["content"],0,200).'...';

            //get the featured image link if present
            if (!is_null($post->better_featured_image)){
                $curpost["thumb"] = $post->better_featured_image->media_details->sizes->medium->source_url;
            }

            //get the post categories
            $cat_list = [];
            foreach($post->pure_taxonomies->categories as $tax_obj){
                $cat_list[] = $tax_obj->name;
            }

            $curpost["categories"] = $cat_list;
            $formatted_posts[] = $curpost;

        }

        return response()->json($formatted_posts);
    }



    //returns a curl instance with http auth header already set
    private function getCurl(){

        // using http basic auth
        $auth_header = ["Authorization: Basic " . base64_encode(self::WP_USERNAME . ":" . self::WP_PASSWORD)];

        $curl = curl_init();
        curl_setopt_array($curl, array(
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_HTTPHEADER => $auth_header
        ));

        return $curl;
    }
}

//load wp posts
function loadPosts(){
    $.ajax({
        url: '/api/blog/get-latest-three-posts',
        method: 'GET',
        dataType: "json",
        success: function (posts, txtStatus, xhr) {
            $.each(posts, function (index, post) {
                //console.log(post);
                var post_html = '<div class="post-block">';

                if (post.hasOwnProperty('thumb')) {
                    post_html += '<div class="post-thumb">';
                    post_html += '<img src="' + post.thumb + '" alt="Post Thumb">';
                    post_html += '</div>';
                }

                post_html += '<div class="post-body">';
                post_html += '<div class="post-categories">';
                $.each(post.categories, function (index, category) {
                    post_html += '<span class="subcategory-label">' + category + '</span>';
                });
                post_html += '</div>';
                post_html += '<h3><a href="' + post.url + '"target="_blank">' + post.title + '</a></h3>';
                post_html += '<p class="post-date"><small>' + post.date + '</small></p>'
                post_html += '<p>' + post.abbr + '</p>';
                post_html += '<div class="text-left">'
                post_html += '<a href="' + post.url + '" class="btn post-read-all" target="_blank">Leggi tutto</a>'
                post_html += '</div>';
                post_html += '</div>';
                post_html += '</div>';

                $('#wp-posts').append(post_html);
            });
        },
        error: function (xhr) {
            $('#wp-posts').append('<p><strong>Impossibile caricare i post in questo momento</strong></p>');
        }

    });

}