service.php

<?php
/**
 * Handles the different services that can be connected to Social.
 *
 * @package Social
 */
abstract class Social_Service {

	/**
	 * @var  string  the service
	 */
	public $service = '';

	/**
	 * @var string  the UI display value
	 */
	public $title = '';

	/**
	 * @var  array  service's accounts
	 */
	protected $accounts = array();

	/**
	 * @var  WP_User  current user
	 */
	private $user = false;

	/**
	 * Initializes the service, and loads a user by ID.
	 *
	 * @param  int  $user_id
	 */
	public function __construct($user_id = null) {
		if ($user_id === null) {
			$this->user = wp_get_current_user();
		}
		else {
			$this->user = get_userdata($user_id);

			// Load the users account(s)
			$accounts = get_user_meta($user_id, Social::$prefix . 'accounts', true);
			if (!empty($accounts) and isset($accounts[$this->service])) {
				$this->accounts = $accounts[$this->service];
			}
		}
	}

	/**
	 * Sets the service accounts. Returns all of the service's accounts.
	 *
	 * @param  array  $accounts
	 * @return array|IService
	 */
	public function accounts(array $accounts = null) {
		if ($accounts === null) {
			return $this->accounts;
		}

		$this->accounts = $accounts;
		return $this;
	}

	/**
	 * Adds an account to the service. Returns an account by ID.
	 *
	 * @param  int|object  $account
	 * @return array|bool|IService
	 */
	public function account($account) {
		if (is_int($account) or is_string($account)) {
			return (isset($this->accounts[$account]) ? $this->accounts[$account] : false);
		}

		$this->accounts[$account->user->id] = $account;
		return $this;
	}

	/**
	 * Returns the UI-friendly version of the service.
	 *
	 * @return string
	 */
	public function title() {
		$title = $this->title;
		if (empty($title)) {
			$title = ucwords(str_replace('_', ' ', $this->service));
		}

		return $title;
	}

	/**
	 * Checks to see if the WP_User object is loaded.
	 *
	 * @return bool
	 */
	public function loaded() {
		return ($this->user !== false and $this->user->ID) ? true : false;
	}

	/**
	 * Disconnects an account from the user's account.
	 *
	 * @param  int  $id
	 * @return void
	 */
	public function disconnect($id) {
		if (!is_admin() or IS_PROFILE_PAGE) {
			$accounts = get_user_meta($this->user->ID, Social::$prefix . 'accounts', true);;
			if (isset($accounts[$this->service][$id])) {
				unset($accounts[$this->service][$id]);
				update_user_meta($this->user->ID, Social::$prefix . 'accounts', $accounts);
			}
		}
		else {
			$accounts = get_option(Social::$prefix . 'accounts', array());
			if (isset($accounts[$this->service][$id])) {
				unset($accounts[$this->service][$id]);
				update_option(Social::$prefix . 'accounts', $accounts);
			}
		}
	}

	/**
	 * Saves a WP_User object.
	 *
	 * @param  int|object  $account  the account ID
	 * @return void
	 */
	public function save($account = null) {
		if (!is_admin() or IS_PROFILE_PAGE) {
			$accounts = get_user_meta(get_current_user_id(), Social::$prefix . 'accounts', true);
			if ($account === null) {
				$accounts[$this->service] = $this->accounts;
			}
			else {
				if (is_int($account)) {
					$account = $this->account($account);
				}
				$accounts[$this->service][$account->user->id] = $account;
			}
			update_user_meta(get_current_user_id(), Social::$prefix . 'accounts', $accounts);
		}
		else {
			$accounts = get_option(Social::$prefix . 'accounts', array());
			if ($account === null) {
				$accounts[$this->service] = $this->accounts;
			}
			else {
				if (is_int($account)) {
					$account = $this->account($account);
				}
				$accounts[$this->service][$account->user->id] = $account;
			}
			update_option(Social::$prefix . 'accounts', $accounts);
		}
	}

	/**
	 * Formats the broadcast content.
	 *
	 * @param  object  $post
	 * @param  string  $format
	 * @return string
	 */
	public function format_content($post, $format) {
		// Filter the format
		$format = apply_filters(Social::$prefix . 'broadcast_format', $format);
		$format = apply_filters(Social::$prefix . $this->service . '_broadcast_format', $format);


		$_format = $format;
		$available = $this->max_broadcast_length();
		foreach (Social::broadcast_tokens() as $token => $description) {
			$_format = str_replace($token, '', $_format);
		}
		$available = $available - strlen($_format);

		$_format = explode(' ', $format);
		foreach (Social::broadcast_tokens() as $token => $description) {
			$content = '';
			switch ($token) {
				case '{url}':
					$url = wp_get_shortlink($post->ID);
					if (empty($url)) {
						$url = home_url('?p='.$post->ID);
					}
					$url = apply_filters(Social::$prefix . 'broadcast_permalink', $url, $post);
					$url = apply_filters(Social::$prefix . $this->service . '_broadcast_permalink', $url, $post);
					$content = $url;
					break;
				case '{title}':
					$content = $post->post_title;
					break;
				case '{content}':
					$content = strip_tags($post->post_content);
					$content = str_replace(array("\n", "\r", PHP_EOL), '', $content);
					break;
				case '{author}':
					$user = get_userdata($post->post_author);
					$content = $user->display_name;
					break;
				case '{date}':
					$content = get_date_from_gmt($post->post_date_gmt);
					break;
			}

			if (strlen($content) > $available) {
				if (in_array($token, array('{date}', '{author}'))) {
					$content = '';
				}
				else {
					$content = substr($content, 0, ($available-3)).'...';
				}
			}

			// Filter the content
			$content = apply_filters(Social::$prefix . 'format_content', $content, $post, $format);
			$content = apply_filters(Social::$prefix . $this->service . '_format_content', $content, $post, $format);

			foreach ($_format as $haystack) {
				if (strpos($haystack, $token) !== false) {
					if ($available > 0) {
						$haystack = str_replace($token, $content, $haystack);
						$available = $available - strlen($haystack);
						$format = str_replace($token, $content, $format);
						break;
					}
				}
			}
		}

		return $format;
	}

	/**
	 * Performs an API request.
	 *
	 * @param  string      $service  service to use
	 * @param  int|object  $account  account to use
	 * @param  string      $api      API endpoint to request
	 * @param  array       $params   parameters to pass to the API
	 * @param  string      $method   GET|POST, default: GET
	 * @return mixed
	 */
	public function do_request($service, $account, $api, array $params = array(), $method = 'GET') {
		if (!is_object($account)) {
			$account = $this->account($account);
		}
		return Social_Helper::request($service, $api, $account->keys->public, $account->keys->secret, $params, $method);
	}

	/**
	 * Returns the disconnect URL.
	 *
	 * @static
	 * @param  object  $account
	 * @param  bool    $is_admin
	 * @param  string  $before
	 * @param  string  $after
	 * @return string
	 */
	public function disconnect_url($account, $is_admin = false, $before = '', $after = '') {
		$params = array(
			Social::$prefix . 'disconnect' => 'true',
			'id' => $account->user->id,
			'service' => $this->service
		);
		if ($is_admin) {
			$url = Social_Helper::settings_url($params);
			$text = '<span title="'.__('Disconnect', Social::$i18n).'" class="social-disconnect social-ir">' . __('Disconnect', Social::$i18n) . '</span>';
		}
		else {
			$path = array();
			foreach ($params as $key => $value) {
				$path[] = $key . '=' . urlencode($value);
			}

			$redirect_to = $_SERVER['REQUEST_URI'];
			if (isset($_GET['redirect_to'])) {
				$redirect_to = $_GET['redirect_to'];
			}

			$url = site_url('?' . implode('&', $path) . '&redirect_to=' . $redirect_to);
			$text = 'Disconnect';
		}

		return sprintf('%s<a href="%s">%s</a>%s', $before, $url, $text, $after);
	}

} // End Social_Service