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sunnyluthra/bot-for-wp.php

Created May 18, 2016 14:13
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  1. sunnyluthra created this gist May 18, 2016.
    138 changes: 138 additions & 0 deletions bot-for-wp.php
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,138 @@
    <?php
    /*
    Plugin Name: Bot For WP
    Description: Messenger bot for WordPress
    Plugin URI: http://snypd.com/
    Author: Sunny Luthra
    Author URI: http://#
    Version: 1.0
    License: GPL2
    */
    if (!defined('ABSPATH')) {
    exit;
    }

    class Bot_For_WP {
    function __construct() {
    // Namespace of our plugin
    $this->namespace = 'bot-for-wp';
    // Verify Token
    $this->verify_token = 'SOME_RANDOM_STRING';
    // FB URL for posting
    $this->graph_api_url = 'https://graph.facebook.com/v2.6/me/messages?access_token=';
    // Page access token
    $this->access_token = 'ACCESS_TOKEN';

    // Add route for facebook to post/get requests
    add_action('rest_api_init', array($this, 'register_routes'));
    }
    function register_routes() {
    register_rest_route($this->namespace, '/bot', array(
    array(
    'methods' => WP_REST_Server::READABLE,
    'callback' => array($this, 'get'),
    'permission_callback' => array($this, 'verify_request'),
    ),
    array(
    'methods' => WP_REST_Server::CREATABLE,
    'callback' => array($this, 'post'),
    ),
    ));
    }
    function verify_request($request) {
    $params = $request->get_query_params();
    if ($params && isset($params['hub_challenge']) && $params['hub_verify_token'] == $this->verify_token) {
    return true;
    }
    return false;
    }
    function get($request) {
    $params = $request->get_query_params();
    echo $params['hub_challenge'];
    die();
    }
    function post($request) {
    $params = $request->get_params();
    if ($params && $params['entry']) {
    foreach ((array) $params['entry'] as $entry) {
    if ($entry && $entry['messaging']) {
    foreach ((array) $entry['messaging'] as $message) {
    $this->send_message($message);
    }
    }
    }
    }
    die();
    }
    function send_message($message) {
    // Facebook alos sends delivevery messages
    // so its better to check for text.
    if (!isset($message['message']['text'])) {
    return;
    }
    $sender_id = $message['sender']['id'];
    $text = strtolower($message['message']['text']);
    // Graph URL With Token
    $graph = $this->graph_api_url . $this->access_token;

    if ($text == 'posts') {
    $template = array(
    'attachment' => array(
    'type' => 'template',
    'payload' => array(
    'template_type' => 'generic',
    'elements' => $this->get_posts_elements(),
    ),
    ),
    );
    } else {
    // Text Template
    $template = array('text' => 'hi');
    }
    $data = array(
    'body' => array(
    'recipient' => array('id' => $sender_id),
    'message' => $template,
    ),
    );
    $response = wp_remote_post($graph, $data);

    }

    function get_posts_elements() {
    $args = array(
    'posts_per_page' => 10,
    'post_type' => 'post',
    );
    $posts = get_posts($args);
    $elements = [];
    if ($posts) {
    foreach ($posts as $post) {
    $data = array(
    'title' => $this->truncate($post->post_title, 45),
    'image_url' => 'http://thecatapi.com/api/images/get?format=src&type=png',
    'subtitle' => $this->truncate($post->post_content, 80),
    'buttons' => array(
    array(
    'type' => 'web_url',
    'url' => get_permalink($post),
    'title' => 'View Story',
    ),
    ),
    );
    $elements[] = $data;
    }
    }
    return $elements;
    }
    function truncate($text, $length) {
    // This is for truncating title and subtitles
    $length = abs((int) $length);
    $text = trim(preg_replace("/&#?[a-z0-9]{2,8};/i", "", $text));
    if (strlen($text) > $length) {
    $text = preg_replace("/^(.{1,$length})(\s.*|$)/s", '\\1...', $text);
    }
    return ($text);
    }
    }
    new Bot_For_WP;