Automod actions + ModActions public interface

backend/src/plugins/Automod/actions/reply.ts

@@ -0,0 +1,63 @@
+import * as t from "io-ts";
+import { automodAction } from "../helpers";
+import {
+  convertDelayStringToMS,
+  noop,
+  renderRecursively,
+  stripObjectToScalars,
+  tDelayString,
+  tMessageContent,
+  tNullable,
+} from "../../../utils";
+import { TextChannel } from "eris";
+import { AutomodContext } from "../types";
+import { renderTemplate } from "../../../templateFormatter";
+
+export const ReplyAction = automodAction({
+  configType: t.union([
+    t.string,
+    t.type({
+      text: tMessageContent,
+      auto_delete: tNullable(t.union([tDelayString, t.number])),
+    }),
+  ]),
+
+  async apply({ pluginData, contexts, actionConfig }) {
+    const contextsWithTextChannels = contexts
+      .filter(c => c.message?.channel_id)
+      .filter(c => pluginData.guild.channels.get(c.message.channel_id) instanceof TextChannel);
+
+    const contextsByChannelId = contextsWithTextChannels.reduce((map: Map<string, AutomodContext[]>, context) => {
+      if (!map.has(context.message.channel_id)) {
+        map.set(context.message.channel_id, []);
+      }
+
+      map.get(context.message.channel_id).push(context);
+      return map;
+    }, new Map());
+
+    for (const [channelId, _contexts] of contextsByChannelId.entries()) {
+      const users = Array.from(new Set(_contexts.map(c => c.user).filter(Boolean)));
+      const user = users[0];
+
+      const renderReplyText = async str =>
+        renderTemplate(str, {
+          user: stripObjectToScalars(user),
+        });
+      const formatted =
+        typeof actionConfig === "string"
+          ? await renderReplyText(actionConfig)
+          : await renderRecursively(actionConfig.text, renderReplyText);
+
+      if (formatted) {
+        const channel = pluginData.guild.channels.get(channelId) as TextChannel;
+        const replyMsg = await channel.createMessage(formatted);
+
+        if (typeof actionConfig === "object" && actionConfig.auto_delete) {
+          const delay = convertDelayStringToMS(String(actionConfig.auto_delete));
+          setTimeout(() => replyMsg.delete().catch(noop), delay);
+        }
+      }
+    }
+  },
+});