refactor: unify channel config matching and gating

Co-authored-by: thewilloftheshadow <thewilloftheshadow@users.noreply.github.com>

src/channels/command-gating.ts

@@ -21,3 +21,19 @@ export function resolveCommandAuthorizedFromAuthorizers(params: {
   }
   return authorizers.some((entry) => entry.configured && entry.allowed);
 }
+
+export function resolveControlCommandGate(params: {
+  useAccessGroups: boolean;
+  authorizers: CommandAuthorizer[];
+  allowTextCommands: boolean;
+  hasControlCommand: boolean;
+  modeWhenAccessGroupsOff?: CommandGatingModeWhenAccessGroupsOff;
+}): { commandAuthorized: boolean; shouldBlock: boolean } {
+  const commandAuthorized = resolveCommandAuthorizedFromAuthorizers({
+    useAccessGroups: params.useAccessGroups,
+    authorizers: params.authorizers,
+    modeWhenAccessGroupsOff: params.modeWhenAccessGroupsOff,
+  });
+  const shouldBlock = params.allowTextCommands && params.hasControlCommand && !commandAuthorized;
+  return { commandAuthorized, shouldBlock };
+}