uc_cron_gbase_token.include

<?php

require_once('uc_cron_gbase_token.include');

function uc_cron_gbase_token($new_token = NULL) {
    static $token;

    if (!empty($new_token)) {
        $new_token = trim($new_token);
        variable_set('uc_gbase_token', uc_gbase_encrypt($new_token));
        $token = $new_token;
    } elseif (empty($token)) {
        $token = uc_cron_gbase_decrypt(variable_get('uc_gbase_token', NULL));
    }
    return $token;
}

function uc_cron_gbase_check_token($token) {
	$token_info_url = 'https://www.google.com/accounts/AuthSubTokenInfo';
	$headers = array(
		'Content-Type' => 'application/x-www-form-urlencoded',
		'Authorization' => 'AuthSub token="' . $token . '"',
	);
	$result = drupal_http_request($token_info_url, $headers);
	return ($result->code == 200);
}

function uc_cron_gbase_exchange_token() {
	$url = 'https://www.google.com/accounts/AuthSubSessionToken';
	$token = $_GET['token'];

	$headers = array('Authorization' => 'AuthSub token="' . $token . '"');
	$result = drupal_http_request($url, $headers);

	list($temp, $token) = explode('=', $result->data, 2);

	if (empty($token)) {
		watchdog('uc_cron_gbase', t('Failed to receive AuthSub session token.'), NULL, WATCHDOG_ERROR);
		drupal_set_message(t('Failed to receive AuthSub session token.'), 'error');
	}

	uc_cron_gbase_token($token);
	drupal_goto('admin/store/settings/uc_cron_gbase');
}

function uc_cron_gbase_encrypt($string) {
	$key = uc_cron_gbase_get_key();
	$result = '';
	for($i=0; $i<strlen($string); $i++) {
		$char = substr($string, $i, 1);
		$keychar = substr($key, ($i % strlen($key))-1, 1);
		$char = chr(ord($char)+ord($keychar));
		$result.=$char;
	}

	return base64_encode($result);
}

function uc_cron_gbase_decrypt($string) {
	$key = uc_cron_gbase_get_key();
	$result = '';
	$string = base64_decode($string);

	for($i=0; $i<strlen($string); $i++) {
		$char = substr($string, $i, 1);
		$keychar = substr($key, ($i % strlen($key))-1, 1);
		$char = chr(ord($char)-ord($keychar));
		$result.=$char;
	}

	return $result;
}

function uc_cron_gbase_get_key() {
	global $cookie_domain, $db_url;
	return md5($cookie_domain . $db_url . $_SERVER['SERVER_NAME']);
}


function uc_cron_gbase_store_admin_settings_form() {

// variable_get('uc_currency_sign', 'moo');

	$form = array();
	$form['authentication'] = array(
	    '#type' => 'fieldset',
	    '#title' => t('Authentication'),
	    '#collapsible' => FALSE,
		'#collapsed' => FALSE,
	);
	
	$form['settings'] = array(
	    '#type' => 'fieldset',
	    '#title' => t('Settings'),
	    '#collapsible' => FALSE,
		'#collapsed' => FALSE,
	);	

    $form['settings']['uc_cron_gbase_enabled'] = array(
		'#type'          => 'radios',
		'#default_value' => variable_get('uc_cron_gbase_enabled',1),
		'#options'       => array(
			1 => t('Submit new/edited products item to Google Merchant by default.'),
			0 => t('Do not submit new/edited product items to Google Merchant by default.')
        ),
		'#description'   => 'Control if products on new / edited products should be submitted to Google Merchant by default'

    );
	
	$form['settings']['uc_cron_gbase_default_taxonomy'] = array(
	    '#type' => 'textfield',
	    '#title' => t('Default Taxonomy'),
	    '#size' => 60,
	    '#maxlength' => 500,
	    '#required' => TRUE,
		'#description'   =>'The default category which this Product should be listed under on Google Product Search, 
		        You Can refer to categories on <a href="http://www.google.com/support/merchants/bin/answer.py?hl=en&answer=160081">Google Merchant Help</a>,
		        Or you can find the sheet on <a href="http://www.google.com/basepages/producttype/taxonomy.txt">Product Taxonomy</a>,
		        An example of what you should enter in this field is:<br /> Electronics > Computers > Computer Components > Storage Devices > Hard Drives
				',	
		'#default_value' => variable_get('uc_cron_gbase_default_taxonomy', ''),
	);
	
    $form['settings']['uc_cron_gbase_default_condition'] = array(
        '#type'          => 'radios',
        '#title'         => 'Product Condition',
        '#default_value' => variable_get('uc_cron_gbase_default_condition', 0),
        '#options'       => array(
            t('New'),
            t('Used'),
            t('Refurbished')
		),
		'#description'  => 'Set the default condition of your products'
    );	

	$token = uc_cron_gbase_token();

    // Check if token is still valid.
	if(uc_cron_gbase_check_token($token)) {
	    $status = theme('image', 'misc/watchdog-ok.png', t('Authenticatedthenticated'), t('Authenticated')) . ' ' . t("You have successfully signed in to your Google Account.");
	} else {
		$itemsFeedURL = 'http://www.google.com/base/feeds/items';
		$next_url = url('uc_cron_gbase/exchange', array('absolute' => TRUE));
		$redirect_url = 'https://www.google.com/accounts/AuthSubRequest?session=1';
		$redirect_url .= '&next=';
		$redirect_url .= urlencode($next_url);
		$redirect_url .= "&scope=";
		$redirect_url .= urlencode($itemsFeedURL);

		$status = theme('image', 'misc/watchdog-error.png', t('Error'), t('Error')) . ' ' . t('You must') . ' ' . l('sign in to your Google account', $redirect_url) . '.';
	}
	
	$form['authentication']['status'] = array(
		'#value' => $status,
	);

	$form['authentication']['uc_cron_gbase_key'] = array(
	    '#type' => 'textfield',
	    '#title' => t('Developer Key'),
	    '#size' => 60,
	    '#maxlength' => 255,
	    '#required' => TRUE,
		'#default_value' => variable_get('uc_cron_gbase_key', ''),
	);
	
	// @todo add variable_get('uc_cron_gbase_key', '') form field

	$form = system_settings_form($form);
	return $form;
}