automod: add role_added and role_removed triggers

backend/src/plugins/Automod/events/RunAutomodOnMemberUpdate.ts

@@ -0,0 +1,34 @@
+import { eventListener } from "knub";
+import { AutomodContext, AutomodPluginType } from "../types";
+import { RecentActionType } from "../constants";
+import { runAutomod } from "../functions/runAutomod";
+import isEqual from "lodash.isequal";
+import diff from "lodash.difference";
+
+export const RunAutomodOnMemberUpdate = eventListener<AutomodPluginType>()(
+  "guildMemberUpdate",
+  ({ pluginData, args: { member, oldMember } }) => {
+    if (!oldMember) return;
+
+    if (isEqual(oldMember.roles, member.roles)) return;
+
+    const addedRoles = diff(member.roles, oldMember.roles);
+    const removedRoles = diff(oldMember.roles, member.roles);
+
+    if (addedRoles.length || removedRoles.length) {
+      const context: AutomodContext = {
+        timestamp: Date.now(),
+        user: member.user,
+        member,
+        rolesChanged: {
+          added: addedRoles,
+          removed: removedRoles,
+        },
+      };
+
+      pluginData.state.queue.add(() => {
+        runAutomod(pluginData, context);
+      });
+    }
+  },
+);