Clearer message for range blocks on CreateAccount

If a user tries to create an account but their
IP address is part of a range block, this will
be reflected in the error that is displayed via
the cantcreateaccount-range-text message.

Bug: 35090
Change-Id: I74e912755dea93c2b74e67d7104b7525298051c0

includes/specials/SpecialUserlogin.php

@@ -980,14 +980,23 @@ class LoginForm extends SpecialPage {
 		# haven't bothered to log out before trying to create an account to
 		# evade it, but we'll leave that to their guilty conscience to figure
 		# out.
+		$errorParams = array(
+			$block->getTarget(),
+			$block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
+			$block->getByName()
+		);
+
+		if ( $block->getType() === Block::TYPE_RANGE ) {
+			$errorMessage = 'cantcreateaccount-range-text';
+			$errorParams[] = $this->getRequest()->getIP();
+		} else {
+			$errorMessage = 'cantcreateaccount-text';
+		}
+
 		throw new ErrorPageError(
 			'cantcreateaccounttitle',
-			'cantcreateaccount-text',
-			array(
-				$block->getTarget(),
-				$block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
-				$block->getByName()
-			)
+			$errorMessage,
+			$errorParams
 		);
 	}
 

languages/messages/MessagesEn.php

@@ -1615,6 +1615,9 @@ Please check the comparison below to verify that this is what you want to do, an
 
 # Account creation failure
 'cantcreateaccounttitle' => 'Cannot create account',
+'cantcreateaccount-range-text' => "Account creation from IP addresses in the range '''$1''', which includes your IP address ('''$4'''), has been blocked by [[User:$3|$3]].
+
+The reason given by $3 is ''$2''",
 'cantcreateaccount-text' => "Account creation from this IP address ('''$1''') has been blocked by [[User:$3|$3]].
 
 The reason given by $3 is ''$2''",

languages/messages/MessagesQqq.php

@@ -2266,6 +2266,11 @@ See also:
 * $1 - target IP address
 * $2 - reason or {{msg-mw|blockednoreason}}
 * $3 - username',
+'cantcreateaccount-range-text' => "Used as more detailed version of the {{msg-mw|Cantcreateaccount-text}} error message, with the title {{msg-mw|cantcreateaccounttitle}}.
+* $1 - target IP range
+* $2 - reason or {{msg-mw|blockednoreason}}
+* $3 - username
+* $4 - current user's IP address",
 
 # History pages
 'viewpagelogs' => 'Link displayed in history of pages',

maintenance/language/messages.inc

@@ -800,6 +800,7 @@ $wgMessageStructure = array(
 	'cantcreateaccount' => array(
 		'cantcreateaccounttitle',
 		'cantcreateaccount-text',
+		'cantcreateaccount-range-text',
 	),
 	'history' => array(
 		'viewpagelogs',