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<?php


/**
 * Class incorporates akismet screening into inbound form submission process
 *
 * @package Leads
 * @subpackage Akismet
 */


class Inbound_Akismet {

    function __construct() {
        self::load_hooks();
    }

    private function load_hooks() {
        /* Load hooks if akismet filtering is enabled */
        add_action( 'inbound_check_if_spam', array(__CLASS__, 'check_is_spam' ), 10, 2 );
    }

    /* Checks if post content contains spam material
    *
    * @param lead_data ARRAY
    *
    * @return BOOL true for spam and false for spam
    *
    */
    public static function check_is_spam( $is_spam = false,  $lead_data ) {

        if (!Leads_Settings::get_setting('inbound_forms_enable_akismet', '1' )) {
            return;
        }

        $api_key = Inbound_Akismet::get_api_key();

        /* return false if akismet is not setup */
        if (!$api_key) {
            return false;
        }

        $params = Inbound_Akismet::prepare_params( $lead_data );
        $is_spam = Inbound_Akismet::api_check( $params );

        /* if not spam return false */
        if (!$is_spam) {
            return false;
        }
        /* else return true for spam */
        else {
            return true;
        }
    }

    /* This function polls Akismet to see if submitted content contains spam */
    public static function api_check( $params ) {
        global $akismet_api_host, $akismet_api_port;

        /* bail if no content to check against akismet */
        if (!isset($params['comment_content'])) {
            return;
        }

        $spam = false;
        $query_string = '';

        foreach ( $params as $key => $data ) {
            $query_string .= $key . '=' . urlencode( wp_unslash( (string) $data ) ) . '&';
        }

        if ( is_callable( array( 'Akismet', 'http_post' ) ) ) { /* Akismet v3.0+ */
            $response = Akismet::http_post( $query_string, 'comment-check' );
        } else {
            $response = akismet_http_post( $query_string, $akismet_api_host,
                '/1.1/comment-check', $akismet_api_port );
        }

        /* returns true if spam else return false */
        if ( 'true' == $response[1] ) {
            return true;
        }

        return false;
    }

    /* Get Akismet API key */
    public static function get_api_key() {

        if ( is_callable( array( 'Akismet', 'get_api_key' ) ) ) { /* Akismet v3.0+ */
            return (bool) Akismet::get_api_key();
        }

        if ( function_exists( 'akismet_get_key' ) ) {
            return (bool) akismet_get_key();
        }

        return false;
    }

    /* Extract lead data and prepare params for akismet filtering */
    public static function prepare_params( $lead_data ) {

        $first_name = (isset($lead_data['wpleads_first_name'])) ? $lead_data['wpleads_first_name'] : '';
        $last_name = (isset($lead_data['wpleads_last_name'])) ? $lead_data['wpleads_last_name'] : '';
        $email_address = (isset($lead_data['wpleads_email_address'])) ? $lead_data['wpleads_email_address'] : '';

        $content = Inbound_Akismet::detect_content( $lead_data );


        $params = array(
            'comment_author' => $first_name . ' ' . $last_name,
            /*'comment_author' => 'spamcheck-test-123', */
            'comment_author_email' => $email_address,
            'comment_content' => $content
        );

        $params['blog'] = get_option( 'home' );
        $params['blog_lang'] = get_locale();
        $params['blog_charset'] = get_option( 'blog_charset' );
        $params['user_ip'] = preg_replace( '/[^0-9., ]/', '', $_SERVER['REMOTE_ADDR'] );
        $params['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
        $params['referrer'] = $_SERVER['HTTP_REFERER'];
        $params['permalink'] = $_SERVER['HTTP_REFERER'];
        $params['comment_type'] = 'contact-form';

        return $params;
    }

    public static function detect_content( $lead_data ) {

        /* Look for the form_input_values key in lead data array first */
        if (isset($lead_data['form_input_values'])) {
            $form_submit_values = json_decode( stripslashes($lead_data['form_input_values']), true );

            if (!is_array($form_submit_values)) {
                $form_submit_values = array();
            }

            /* If notes is mapped to the form then use the 'wpleads_notes' map key */
            if (isset($form_submit_values['wpleads_notes'])) {
                return $form_submit_values['wpleads_notes'];
            }

            /* detect multi-line content in form submission */
            foreach ( $form_submit_values as $key => $value ) {
                if ( !is_array( $value ) && substr_count( $value, "\n" ) > 1 ) {
                    return $value;
                }
            }
        }


        /* Next look to see if our data is available in the main array */
        if (isset($lead_data['wpleads_notes'])) {
            return $lead_data['wpleads_notes'];
        }

        /* detect multi-line content in form submission */
        foreach ( $lead_data as $key => $value ) {
            if ( !is_array( $value ) && substr_count( $value, "\n" ) > 1 ) {
                return $value;
            }
        }

        return '';
    }

}

/**
 *      Load Inbound Akismet
 */
new Inbound_Akismet();