<?php

/* !
 * HybridAuth
 * http://hybridauth.sourceforge.net | http://github.com/hybridauth/hybridauth
 * (c) 2009-2015, HybridAuth authors | http://hybridauth.sourceforge.net/licenses.html
 */

/**
 * Hybrid_Providers_LinkedIn provider adapter based on OAuth1 protocol
 *
 * Hybrid_Providers_LinkedIn use linkedinPHP library created by fiftyMission Inc.
 *
 * http://hybridauth.sourceforge.net/userguide/IDProvider_info_LinkedIn.html
 */
class Hybrid_Providers_LinkedIn extends Hybrid_Provider_Model {

	/**
	 * Provider API Wrapper
	 * @var LinkedIn 
	 */
	public $api;

	/**
	 * {@inheritdoc}
	 */
	function initialize() {
		if (!$this->config["keys"]["key"] || !$this->config["keys"]["secret"]) {
			throw new Exception("Your application key and secret are required in order to connect to {$this->providerId}.", 4);
		}
		if (!class_exists('OAuthConsumer', false)) {
			require_once Hybrid_Auth::$config["path_libraries"] . "OAuth/OAuth.php";
		}
		require_once Hybrid_Auth::$config["path_libraries"] . "LinkedIn/LinkedIn.php";

		$this->api = new LinkedIn(array('appKey' => $this->config["keys"]["key"], 'appSecret' => $this->config["keys"]["secret"], 'callbackUrl' => $this->endpoint));

		if ($this->token("access_token_linkedin")) {
			$this->api->setTokenAccess($this->token("access_token_linkedin"));
		}
	}

	/**
	 * {@inheritdoc}
	 */
	function loginBegin() {
		// send a request for a LinkedIn access token
		$response = $this->api->retrieveTokenRequest();

		if (isset($response['success']) && $response['success'] === true) {
			$this->token("oauth_token", $response['linkedin']['oauth_token']);
			$this->token("oauth_token_secret", $response['linkedin']['oauth_token_secret']);

			# redirect user to LinkedIn authorisation web page
			Hybrid_Auth::redirect(LINKEDIN::_URL_AUTH . $response['linkedin']['oauth_token']);
		} else {
			throw new Exception("Authentication failed! {$this->providerId} returned an invalid Token.", 5);
		}
	}

	/**
	 * {@inheritdoc}
	 */
	function loginFinish() {
        // in case we get oauth_problem=user_refused
        if (isset($_REQUEST['oauth_problem']) && $_REQUEST['oauth_problem'] == "user_refused") {
            throw new Exception("Authentication failed! The user denied your request.", 5);
        }

		$oauth_token = isset($_REQUEST['oauth_token']) ? $_REQUEST['oauth_token'] : null;
		$oauth_verifier = isset($_REQUEST['oauth_verifier']) ? $_REQUEST['oauth_verifier'] : null;

		if (!$oauth_token || !$oauth_verifier) {
			throw new Exception("Authentication failed! {$this->providerId} returned an invalid Token.", 5);
		}

		$response = $this->api->retrieveTokenAccess($oauth_token, $this->token("oauth_token_secret"), $oauth_verifier);

		if (isset($response['success']) && $response['success'] === true) {
			$this->deleteToken("oauth_token");
			$this->deleteToken("oauth_token_secret");

			$this->token("access_token_linkedin", $response['linkedin']);
			$this->token("access_token", $response['linkedin']['oauth_token']);
			$this->token("access_token_secret", $response['linkedin']['oauth_token_secret']);

			// set user as logged in
			$this->setUserConnected();
		} else {
			throw new Exception("Authentication failed! {$this->providerId} returned an invalid Token.", 5);
		}
	}

	/**
	 * {@inheritdoc}
	 */
	function getUserProfile() {
		try {
			// http://developer.linkedin.com/docs/DOC-1061
			$response = $this->api->profile('~:(id,first-name,last-name,public-profile-url,picture-url,email-address,date-of-birth,phone-numbers,summary)');
		} catch (LinkedInException $e) {
			throw new Exception("User profile request failed! {$this->providerId} returned an error: $e", 6);
		}

		if (isset($response['success']) && $response['success'] === true) {
			$data = @ new SimpleXMLElement($response['linkedin']);

			if (!is_object($data)) {
				throw new Exception("User profile request failed! {$this->providerId} returned an invalid xml data.", 6);
			}

			$this->user->profile->identifier = (string) $data->{'id'};
			$this->user->profile->firstName = (string) $data->{'first-name'};
			$this->user->profile->lastName = (string) $data->{'last-name'};
			$this->user->profile->displayName = trim($this->user->profile->firstName . " " . $this->user->profile->lastName);

			$this->user->profile->email = (string) $data->{'email-address'};
			$this->user->profile->emailVerified = (string) $data->{'email-address'};

			$this->user->profile->photoURL = (string) $data->{'picture-url'};
			$this->user->profile->profileURL = (string) $data->{'public-profile-url'};
			$this->user->profile->description = (string) $data->{'summary'};

			if ($data->{'phone-numbers'} && $data->{'phone-numbers'}->{'phone-number'}) {
				$this->user->profile->phone = (string) $data->{'phone-numbers'}->{'phone-number'}->{'phone-number'};
			} else {
				$this->user->profile->phone = null;
			}

			if ($data->{'date-of-birth'}) {
				$this->user->profile->birthDay = (string) $data->{'date-of-birth'}->day;
				$this->user->profile->birthMonth = (string) $data->{'date-of-birth'}->month;
				$this->user->profile->birthYear = (string) $data->{'date-of-birth'}->year;
			}

			return $this->user->profile;
		} else {
			throw new Exception("User profile request failed! {$this->providerId} returned an invalid response.", 6);
		}
	}

	/**
	 * {@inheritdoc}
	 */
	function getUserContacts() {
		try {
			$response = $this->api->profile('~/connections:(id,first-name,last-name,picture-url,public-profile-url,summary)');
		} catch (LinkedInException $e) {
			throw new Exception("User contacts request failed! {$this->providerId} returned an error: $e");
		}

		if (!$response || !$response['success']) {
			return array();
		}

		$connections = new SimpleXMLElement($response['linkedin']);

		$contacts = array();

		foreach ($connections->person as $connection) {
			$uc = new Hybrid_User_Contact();

			$uc->identifier = (string) $connection->id;
			$uc->displayName = (string) $connection->{'last-name'} . " " . $connection->{'first-name'};
			$uc->profileURL = (string) $connection->{'public-profile-url'};
			$uc->photoURL = (string) $connection->{'picture-url'};
			$uc->description = (string) $connection->{'summary'};

			$contacts[] = $uc;
		}

		return $contacts;
	}

	/**
	 * {@inheritdoc}
	 */
	function setUserStatus($status) {
		$parameters = array();
		$private = true; // share with your connections only

		if (is_array($status)) {
			if (isset($status[0]) && !empty($status[0]))
				$parameters["title"] = $status[0]; // post title
			if (isset($status[1]) && !empty($status[1]))
				$parameters["comment"] = $status[1]; // post comment
			if (isset($status[2]) && !empty($status[2]))
				$parameters["submitted-url"] = $status[2]; // post url
			if (isset($status[3]) && !empty($status[3]))
				$parameters["submitted-image-url"] = $status[3]; // post picture url
			if (isset($status[4]) && !empty($status[4]))
				$private = $status[4]; // true or false
		}
		else {
			$parameters["comment"] = $status;
		}

		try {
			$response = $this->api->share('new', $parameters, $private);
		} catch (LinkedInException $e) {
			throw new Exception("Update user status update failed!  {$this->providerId} returned an error: $e");
		}

		if (!$response || !$response['success']) {
			throw new Exception("Update user status update failed! {$this->providerId} returned an error.");
		}

		return $response;
	}

	/**
	 * load the user latest activity
	 *    - timeline : all the stream
	 *    - me       : the user activity only
	 * {@inheritdoc}
	 */
	function getUserActivity($stream) {
		try {
			if ($stream == "me") {
				$response = $this->api->updates('?type=SHAR&scope=self&count=25');
			} else {
				$response = $this->api->updates('?type=SHAR&count=25');
			}
		} catch (LinkedInException $e) {
			throw new Exception("User activity stream request failed! {$this->providerId} returned an error: $e");
		}

		if (!$response || !$response['success']) {
			return array();
		}

		$updates = new SimpleXMLElement($response['linkedin']);

		$activities = array();

		foreach ($updates->update as $update) {
			$person = $update->{'update-content'}->person;
			$share = $update->{'update-content'}->person->{'current-share'};

			$ua = new Hybrid_User_Activity();

			$ua->id = (string) $update->id;
			$ua->date = (string) $update->timestamp;
			$ua->text = (string) $share->{'comment'};

			$ua->user->identifier = (string) $person->id;
			$ua->user->displayName = (string) $person->{'first-name'} . ' ' . $person->{'last-name'};
			$ua->user->profileURL = (string) $person->{'site-standard-profile-request'}->url;
			$ua->user->photoURL = null;

			$activities[] = $ua;
		}

		return $activities;
	}

}
