auto_reactions: check permissions ahead-of-time

backend/src/utils/memberHasChannelPermissions.ts

@@ -0,0 +1,8 @@
+import { Constants, GuildChannel, Member, Permission } from "eris";
+import { PluginData } from "knub";
+import { hasChannelPermissions } from "./hasChannelPermissions";
+
+export function memberHasChannelPermissions(member: Member, channel: GuildChannel, permissions: number | number[]) {
+  const memberChannelPermissions = channel.permissionsOf(member.id);
+  return hasChannelPermissions(memberChannelPermissions, permissions);
+}