Add 'set_channel_permission_overrides' custom event action

backend/src/plugins/CustomEvents/actions/setChannelPermissionOverrides.ts

@@ -0,0 +1,41 @@
+import { GuildPluginData } from "knub";
+import { CustomEventsPluginType, TCustomEvent } from "../types";
+import * as t from "io-ts";
+import { ActionError } from "../ActionError";
+
+export const SetChannelPermissionOverridesAction = t.type({
+  type: t.literal("set_channel_permission_overrides"),
+  channel: t.string,
+  overrides: t.array(
+    t.type({
+      type: t.union([t.literal("member"), t.literal("role")]),
+      id: t.string,
+      allow: t.number,
+      deny: t.number,
+    }),
+  ),
+});
+export type TSetChannelPermissionOverridesAction = t.TypeOf<typeof SetChannelPermissionOverridesAction>;
+
+export async function setChannelPermissionOverridesAction(
+  pluginData: GuildPluginData<CustomEventsPluginType>,
+  action: TSetChannelPermissionOverridesAction,
+  values: any,
+  event: TCustomEvent,
+  eventData: any,
+) {
+  const channel = pluginData.guild.channels.get(action.channel);
+  if (!channel) {
+    throw new ActionError(`Unknown channel: ${action.channel}`);
+  }
+
+  for (const override of action.overrides) {
+    await channel.editPermission(
+      override.id,
+      override.allow,
+      override.deny,
+      override.type,
+      `Custom event: ${event.name}`,
+    );
+  }
+}