The plugin should be able to detect the visitor's currency

[wvega]

This issue is about discussing the possible approaches to detect the visitor's currency, choose one and implement that solution.

[dgiraldo36]

To get the visitor's currency, I used the geoplugin.com service, by adding the following function to AUCP_Currency_Conversion class:

public function detect_currency_byIp(){
        $userIP = $_SERVER['REMOTE_ADDR'];
        $request = unserialize(file_get_contents('http://www.geoplugin.net/php.gp?ip='.$userIP)); 
        $retVal = ($request['geoplugin_status'] != 404) ? strtoupper($request['geoplugin_currencyCode']) : 'USD' ;
        return $retVal;
    }

it returns the 3-letter code if available, otherwise returns 'USD'.

[dgiraldo36]

If we want to avoid the http request, we can include de geoip lib and do the geolocation using the function:

geoip_country_code3_by_name($_SERVER['REMOTE_ADDR'])

Returns the three letter country code on success, or FALSE if the address cannot be found in the database.

[jorgeatorres]

After a discussion with @wvega we decided to postpone this until after 1.0.
Some implementation details:

• Detection should be attempted after page load using AJAX.
• Stored target currency (see The plugin should store the selected (or detected) currency #7) should take precedence over this (i.e. not trigger the IP detection).
• If a currency is detected, conversion shouldn't happen automatically. We think users should be informed (somehow) about the detected currency and let them accept it (or change it).