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@reigelgallarde
Forked from sunnyluthra/bot-for-wp.php
Created May 20, 2016 01:29
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<?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;
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