refactor permission checks

default.yaml

@@ -724,6 +724,7 @@ oper-classes:
             - "history"      # modify or delete history messages
             - "defcon"       # use the DEFCON command (restrict server capabilities)
             - "massmessage"  # message all users on the server
+            - "metadata"     # modify arbitrary metadata on channels and users
 
 # ircd operators
 opers:

irc/handlers.go

@@ -3155,7 +3155,7 @@ func metadataHandler(server *Server, client *Client, msg ircmsg.Message, rb *Res
 			return
 		}
 
-		if !metadataCanIEditThisKey(client, target, key) {
+		if !metadataCanIEditThisKey(client, targetObj, key) {
 			noKeyPerms(key)
 			return
 		}
@@ -3192,6 +3192,11 @@ func metadataHandler(server *Server, client *Client, msg ircmsg.Message, rb *Res
 		}
 
 	case "get":
+		if !metadataCanISeeThisTarget(client, targetObj) {
+			noKeyPerms("*")
+			return
+		}
+
 		batchId := rb.StartNestedBatch("metadata")
 		defer rb.EndNestedBatch(batchId)
 
@@ -3224,7 +3229,7 @@ func metadataHandler(server *Server, client *Client, msg ircmsg.Message, rb *Res
 		}
 
 	case "clear":
-		if !metadataCanIEditThisTarget(client, target) {
+		if !metadataCanIEditThisTarget(client, targetObj) {
 			invalidTarget()
 			return
 		}

irc/metadata.go

@@ -117,48 +117,29 @@ func metadataKeyIsEvil(key string) bool {
 		metadataEvilCharsRegexp.MatchString(key) // key can't contain the stuff it can't contain
 }
 
-func metadataCanIEditThisKey(client *Client, target string, _ string) bool {
-	if !metadataCanIEditThisTarget(client, target) { // you can't edit keys on targets you can't edit.
-		return false
-	}
-
-	// todo: we don't actually do anything regarding visibility yet so there's not much to do here
-
-	return true
+func metadataCanIEditThisKey(client *Client, targetObj MetadataHaver, key string) bool {
+	// no key-specific logic as yet
+	return metadataCanIEditThisTarget(client, targetObj)
 }
 
-func metadataCanIEditThisTarget(client *Client, target string) bool {
-	if !metadataCanISeeThisTarget(client, target) { // you can't edit what you can't see. a wise man told me this once
-		return false
+func metadataCanIEditThisTarget(client *Client, targetObj MetadataHaver) bool {
+	switch target := targetObj.(type) {
+	case *Client:
+		return client == target || client.HasRoleCapabs("metadata")
+	case *Channel:
+		return target.ClientIsAtLeast(client, modes.Operator) || client.HasRoleCapabs("metadata")
+	default:
+		return false // impossible
 	}
-
-	if client.HasRoleCapabs("sajoin") { // sajoin opers can do whatever they want
-		return true
-	}
-
-	if target == client.Nick() { // your right to swing your fist ends where my nose begins
-		return true
-	}
-
-	// if you're a channel operator, knock yourself out
-	channel := client.server.channels.Get(target)
-	if channel != nil && channel.ClientIsAtLeast(client, modes.Operator) {
-		return true
-	}
-
-	return false
 }
 
-func metadataCanISeeThisTarget(client *Client, target string) bool {
-	if client.HasRoleCapabs("sajoin") { // sajoin opers can do whatever they want
+func metadataCanISeeThisTarget(client *Client, targetObj MetadataHaver) bool {
+	switch target := targetObj.(type) {
+	case *Client:
 		return true
+	case *Channel:
+		return target.hasClient(client) || client.HasRoleCapabs("metadata")
+	default:
+		return false // impossible
 	}
-
-	// check if the user is in the channel
-	channel := client.server.channels.Get(target)
-	if channel != nil && !channel.hasClient(client) {
-		return false
-	}
-
-	return true
 }

traditional.yaml

@@ -695,6 +695,7 @@ oper-classes:
             - "history"      # modify or delete history messages
             - "defcon"       # use the DEFCON command (restrict server capabilities)
             - "massmessage"  # message all users on the server
+            - "metadata"     # modify arbitrary metadata on channels and users
 
 # ircd operators
 opers: