automod: add role_added and role_removed triggers

backend/src/plugins/Automod/triggers/roleAdded.ts

@@ -0,0 +1,42 @@
+import * as t from "io-ts";
+import { automodTrigger } from "../helpers";
+import { consumeIgnoredRoleChange } from "../functions/ignoredRoleChanges";
+
+interface RoleAddedMatchResult {
+  matchedRoleId: string;
+}
+
+export const RoleAddedTrigger = automodTrigger<RoleAddedMatchResult>()({
+  configType: t.union([t.string, t.array(t.string)]),
+
+  defaultConfig: null,
+
+  async match({ triggerConfig, context, pluginData }) {
+    if (!context.member || !context.rolesChanged || context.rolesChanged.added.length === 0) {
+      return;
+    }
+
+    const triggerRoles = Array.isArray(triggerConfig) ? triggerConfig : [triggerConfig];
+    for (const roleId of triggerRoles) {
+      if (context.rolesChanged.added.includes(roleId)) {
+        if (consumeIgnoredRoleChange(pluginData, context.member.id, roleId)) {
+          continue;
+        }
+
+        return {
+          extra: {
+            matchedRoleId: roleId,
+          },
+        };
+      }
+    }
+  },
+
+  renderMatchInformation({ matchResult, pluginData, contexts }) {
+    const role = pluginData.guild.roles.get(matchResult.extra.matchedRoleId);
+    const roleName = role?.name || "Unknown";
+    const member = contexts[0].member!;
+    const memberName = `**${member.user.username}#${member.user.discriminator}** (\`${member.id}\`)`;
+    return `Role ${roleName} (\`${matchResult.extra.matchedRoleId}\`) was added to ${memberName}`;
+  },
+});