fixes #3639: Added description to GDPR prefs

Added check in shortcode to disable the GDPR message in case the prefs are empty

e107_admin/prefs.php

@@ -575,6 +575,13 @@ $text .= "
 							<div class='smalltext field-help'>".PRFLAN_279."</div>
 						</td>
 					</tr>
+
+					<tr>
+						<td><label>".LAN_DESCRIPTION."</label></td>
+						<td>
+							<div class='field-help'>".nl2br(PRFLAN_281)."</div>
+						</td>
+					</tr>
 				</tbody>
 			</table>
 			".pref_submit('display')."

e107_core/shortcodes/batch/signup_shortcodes.php

@@ -651,6 +651,11 @@ class signup_shortcodes extends e_shortcode
 	 */
 	function sc_signup_gdpr_info()
 	{
+		if (!e107::getPref('gdpr_termsandconditions', '') || !e107::getPref('gdpr_privacypolicy', ''))
+		{
+			return '';
+		}
+
 		$text = e107::getParser()->lanVars(LAN_SIGNUP_124,
 			array($this->sc_signup_gdpr_privacypolicy_link(), $this->sc_signup_gdpr_termsandconditions_link()));
 		return $text;

e107_languages/English/admin/lan_prefs.php

@@ -300,3 +300,11 @@ define("PRFLAN_277", "GDPR Settings");
 define("PRFLAN_278", "URL to the Privacy Policy");
 define("PRFLAN_279", "Make sure the url exists! It's best to use an absolute url. This setting will be used on all places that require a consent from the user (e.g. signup, contact form/menu, etc.).");
 define("PRFLAN_280", "URL to the website terms and conditions");
+define("PRFLAN_281", <<<STR
+The 2 links above are used on various page on this site (e.g. signup and contact form/menu).
+Please create 2 pages (if not already done) that contain your "Privacy Policy" and the websites "Terms and conditions". 
+There are several websites that can generate those text for you.
+Copy the urls of this websites into the fields above (e.g. /page/privacy-policy or /page/terms-and-conditions). 
+Just make sure, the pages and urls exist and are working!
+STR
+);