<?php
class Social_Network_Google extends Social_Protocol_Model_OAuth2 {
    public $scope = "https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email https://www.google.com/m8/feeds/";

    function init() {
        parent::init();
        $this->api->authorize_url = "https://accounts.google.com/o/oauth2/auth";
        $this->api->token_url = "https://accounts.google.com/o/oauth2/token";
        $this->api->token_info_url = "https://www.googleapis.com/oauth2/v1/tokeninfo";
    }

    function startLogin() {
        $parameters = array("scope" => $this->scope, "access_type" => "offline");
        $optionals  = array("scope", "access_type", "redirect_uri", "approval_prompt", "hd");

        foreach ($optionals as $parameter){
            if( isset( $this->config[$parameter] ) && ! empty( $this->config[$parameter] ) ){
                $parameters[$parameter] = $this->config[$parameter];
            }
        }

        Social_Auth::redirect( $this->api->authorizeUrl( $parameters ) );
    }

    function getUserProfile() {
        $this->refreshToken();
        $response = $this->api->api( "https://www.googleapis.com/oauth2/v1/userinfo" );

        if ( ! isset( $response->id ) || isset( $response->error ) ){
            throw new Social_Exception( "User profile request failed! $this->network_name: invalid response.");
        }

        $this->user->profile->identifier    = (property_exists($response,'id'))?$response->id:"";
        $this->user->profile->firstName     = (property_exists($response,'given_name'))?$response->given_name:"";
        $this->user->profile->lastName      = (property_exists($response,'family_name'))?$response->family_name:"";
        $this->user->profile->displayName   = (property_exists($response,'name'))?$response->name:"";
        $this->user->profile->photoURL      = (property_exists($response,'picture'))?$response->picture:"";
        $this->user->profile->profileURL    = "https://profiles.google.com/" . $this->user->profile->identifier;
        $this->user->profile->gender        = (property_exists($response,'gender'))?$response->gender:"";
        $this->user->profile->email         = (property_exists($response,'email'))?$response->email:"";
        $this->user->profile->emailVerified = (property_exists($response,'email'))?$response->email:"";
        $this->user->profile->language      = (property_exists($response,'locale'))?$response->locale:"";

        if( property_exists($response,'birthday') ){
            list($birthday_year, $birthday_month, $birthday_day) = explode( '-', $response->birthday );

            $this->user->profile->birthDay   = (int) $birthday_day;
            $this->user->profile->birthMonth = (int) $birthday_month;
            $this->user->profile->birthYear  = (int) $birthday_year;
        }

        return $this->user->profile;
    }

    function getUserContacts() {
        $this->refreshToken();

        if( ! isset( $this->config['contacts_param'] ) ){
            $this->config['contacts_param'] = array( "max-results" => 500 );
        }

        $response = $this->api->api( "https://www.google.com/m8/feeds/contacts/default/full?"
            . http_build_query( array_merge( array('alt' => 'json'), $this->config['contacts_param'] ) ) );

        if( ! $response ){
            return array();
        }

        $contacts = array();

        foreach( $response->feed->entry as $idx => $entry ){
            $uc = new Social_User_Contact();

            $uc->email = isset($entry->{'gd$email'}[0]->address) ? (string) $entry->{'gd$email'}[0]->address : '';
            $uc->displayName = isset($entry->title->{'$t'}) ? (string) $entry->title->{'$t'} : '';
            $uc->identifier = $uc->email;

            $contacts[] = $uc;
        }

        return $contacts;
    }
}