<?php

defined( 'ABSPATH' ) or exit;


final class Mobile_Contact_Bar_Validator
{
    /**
     * Sanitizes the contact URI.
     *
     * @since 2.0.0
     *
     * @param  string $uri Contact URI (URL, phone number, email address, etc. )
     * @return string      Sanitized URI
     */
    public static function sanitize_contact_uri( $uri )
    {
        if( '' == $uri || '#' == $uri )
        {
            return $uri;
        }

        $parsed_uri = parse_url( $uri );
        $new_uri    = '';

        if( isset( $parsed_uri['scheme'] ) && ( isset( $parsed_uri['host'] ) || isset( $parsed_uri['path'] )))
        {
            switch( $parsed_uri['scheme'] )
            {
                case 'tel':
                case 'sms':
                    $path    = self::sanitize_phone_number( $parsed_uri['path'] );
                    $new_uri = ( '' != $path ) ? $parsed_uri['scheme'] . ':+' . $path : '';
                    break;

                case 'skype':
                    $path    = self::sanitize_skype_name( $parsed_uri['path'] );
                    $action  = in_array( $parsed_uri['query'], array( 'call', 'chat' )) ? $parsed_uri['query'] : 'chat';
                    $new_uri = ( '' != $path ) ? $parsed_uri['scheme'] . ':' . $path . '?' . $action : '';
                    break;

                case 'mailto':
                    $path    = sanitize_email( $parsed_uri['path'] );
                    $new_uri = ( is_email( $path )) ? $parsed_uri['scheme'] . ':' . $path : '';
                    break;

                case 'http':
                case 'https':
                    if( isset( $parsed_uri['path'] ))
                    {
                        $new_uri = untrailingslashit( esc_url_raw( $parsed_uri['scheme'] . '://' . $parsed_uri['host'] . $parsed_uri['path'] ));
                    }
                    else
                    {
                        $new_uri = untrailingslashit( esc_url_raw( $parsed_uri['scheme'] . '://' . $parsed_uri['host'] ));
                    }
                    break;

                default:
                    $new_uri = '';
                    break;
            }
        }
        return $new_uri;
    }


    /**
     * Escapes the contact URI.
     *
     * @since 2.0.0
     *
     * @param  string $uri Contact URI (URL, phone number, email address, etc. )
     * @return string      Escaped URI
     */
    public static function escape_contact_uri( $uri )
    {
        if( '' == $uri || '#' == $uri )
        {
            return $uri;
        }

        $parsed_uri = parse_url( $uri );
        $new_uri    = '';

        if( isset( $parsed_uri['scheme'] ) && ( isset( $parsed_uri['host'] ) || isset( $parsed_uri['path'] )))
        {
            switch( $parsed_uri['scheme'] )
            {
                case 'tel':
                case 'sms':
                    $path    = self::sanitize_phone_number( $parsed_uri['path'] );
                    $new_uri = ( '' != $path ) ? $parsed_uri['scheme'] . ':+' . $path : '';
                    break;

                case 'skype':
                    $path    = self::sanitize_skype_name( $parsed_uri['path'] );
                    $action  = in_array( $parsed_uri['query'], array( 'call', 'chat' )) ? $parsed_uri['query'] : 'chat';
                    $new_uri = ( '' != $path ) ? $parsed_uri['scheme'] . ':' . $path . '?' . $action : '';
                    break;

                case 'mailto':
                    $path    = sanitize_email( $parsed_uri['path'] );
                    $new_uri = ( is_email( $path )) ? $parsed_uri['scheme'] . ':' . $path : '';
                    break;

                case 'http':
                case 'https':
                    if( isset( $parsed_uri['path'] ))
                    {
                        $new_uri = untrailingslashit( esc_url( $parsed_uri['scheme'] . '://' . $parsed_uri['host'] . $parsed_uri['path'] ));
                    }
                    else
                    {
                        $new_uri = untrailingslashit( esc_url( $parsed_uri['scheme'] . '://' . $parsed_uri['host'] ));
                    }
                    break;

                default:
                    $new_uri = '';
                    break;
            }
        }
        return $new_uri;
    }


    /**
     * Sanitizes the value part of a query string parameter.
     *
     * @since 2.0.0
     *
     * @param  string $value Parameter value
     * @param  string $type  Parameter type (text, textarea)
     * @return string        Sanitized parameter value
     */
    public static function sanitize_parameter_value( $value, $type )
    {
        if( ! $value )
        {
            return '';
        }

        switch( $type )
        {
            case 'text':
                $value = sanitize_text_field( $value );
                break;

            case 'textarea':
                $value = sanitize_textarea_field( $value );
                break;

            case 'email':
                $value = self::sanitize_email_addresses( $value );
                break;

            default:
                $value = '';
                break;
        }
        return $value;
    }


    /**
     * Sanitizes skype name.
     *
     * @since 2.0.0
     *
     * @param  string $skype_name Skype name
     * @return string             Filtered skype name
     */
    public static function sanitize_skype_name( $skype_name )
    {
        if( preg_match('/^[a-z][a-z0-9\.,\-_]{5,31}$/i', $skype_name ))
        {
            return $skype_name;
        }

        return '';
    }


    /**
     * Sanitizes phone number.
     *
     * @since 1.2.0
     *
     * @param  string $phone Phone number
     * @return string        Filtered phone number with a plus sign (+) prefix
     */
    public static function sanitize_phone_number( $phone )
    {
        $phone = preg_replace( '/[^0-9\-]/', '', $phone );

        if( $phone )
        {
            return $phone;
        }

        return '';
    }


    /**
     * Sanitizes email address list.
     *
     * @since 2.0.0
     *
     * @param  string $email_addresses Comma separated email address list
     * @return string                  Filtered comma separated email address list
     */
    public static function sanitize_email_addresses( $email_addresses )
    {
        $email_addresses = preg_replace( '/\s+/', '', $email_addresses );

        if( $email_addresses )
        {
            $sanitized_list = array();
            $list = explode( ',', $email_addresses );

            foreach( $list as $item )
            {
                $value = sanitize_email( $item );
                if( is_email( $value ))
                {
                    $sanitized_list[] = $value;
                }
            }
            $email_addresses = join( ',', $sanitized_list );
            return $email_addresses;
        }

        return '';
    }
}