initial

backend/src/plugins/Automod/AutomodPlugin.ts

@@ -146,6 +146,9 @@ const configPreprocessor: ConfigPreprocessorFn<AutomodPluginType> = options => {
         if (rule["actions"]["log"] == null) {
           rule["actions"]["log"] = true;
         }
+        if (rule["actions"]["clean"] === true && rule["actions"]["start_thread"]) {
+          throw new StrictValidationError([`Cannot have both clean and start_thread at rule '${rule.name}'`]);
+        }
       }
     }
   }

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

@@ -14,6 +14,7 @@ import { ReplyAction } from "./reply";
 import { SetAntiraidLevelAction } from "./setAntiraidLevel";
 import { SetCounterAction } from "./setCounter";
 import { SetSlowmodeAction } from "./setSlowmode";
+import { StartThreadAction } from "./startThread";
 import { WarnAction } from "./warn";
 
 export const availableActions: Record<string, AutomodActionBlueprint<any>> = {
@@ -32,6 +33,7 @@ export const availableActions: Record<string, AutomodActionBlueprint<any>> = {
   add_to_counter: AddToCounterAction,
   set_counter: SetCounterAction,
   set_slowmode: SetSlowmodeAction,
+  start_thread: StartThreadAction,
 };
 
 export const AvailableActions = t.type({
@@ -50,4 +52,5 @@ export const AvailableActions = t.type({
   add_to_counter: AddToCounterAction.configType,
   set_counter: SetCounterAction.configType,
   set_slowmode: SetSlowmodeAction.configType,
+  start_thread: StartThreadAction.configType,
 });

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

@@ -0,0 +1,59 @@
+import { ThreadAutoArchiveDuration } from "discord-api-types";
+import { TextChannel } from "discord.js";
+import * as t from "io-ts";
+import { renderTemplate, TemplateSafeValueContainer } from "src/templateFormatter";
+import { tDelayString, tNullable } from "src/utils";
+import { userToTemplateSafeUser } from "src/utils/templateSafeObjects";
+import { noop } from "../../../utils";
+import { automodAction } from "../helpers";
+
+export const StartThreadAction = automodAction({
+  configType: t.type({
+    name: tNullable(t.string),
+    auto_archive: tNullable(t.number),
+    private: tNullable(t.boolean),
+    slowmode: tNullable(tDelayString),
+  }),
+
+  defaultConfig: {},
+
+  async apply({ pluginData, contexts, actionConfig, ruleName }) {
+    // check if the message still exists, we don't want to create threads for deleted messages
+    const threads = contexts.filter(c => {
+      if (!c.message || !c.user) return false;
+      const channel = pluginData.guild.channels.cache.get(c.message.channel_id);
+      if (channel?.type !== "GUILD_TEXT" || !channel.isText()) return false; // for some reason the typing here for channel.type defaults to ThreadChannelTypes (?)
+      return channel.messages.cache.has(c.message.id);
+    });
+    let autoArchive: ThreadAutoArchiveDuration;
+    if (actionConfig.auto_archive === 1440) {
+      autoArchive = ThreadAutoArchiveDuration.OneDay;
+    } else if (actionConfig.auto_archive === 4320) {
+      autoArchive = ThreadAutoArchiveDuration.ThreeDays;
+    } else if (actionConfig.auto_archive === 10080) {
+      autoArchive = ThreadAutoArchiveDuration.OneWeek;
+    } else {
+      autoArchive = ThreadAutoArchiveDuration.OneHour;
+    }
+
+    for (const c of threads) {
+      const channel = pluginData.guild.channels.cache.get(c.message!.channel_id) as TextChannel;
+      const renderThreadName = async str =>
+        renderTemplate(
+          str,
+          new TemplateSafeValueContainer({
+            user: userToTemplateSafeUser(c.user!),
+          }),
+        );
+      const threadName = await renderThreadName(actionConfig.name ?? "{user.username}#{user.discriminator}s thread");
+      await channel.threads
+        .create({
+          name: threadName,
+          autoArchiveDuration: autoArchive,
+          type: actionConfig.private ? "GUILD_PRIVATE_THREAD" : "GUILD_PUBLIC_THREAD",
+          startMessage: !actionConfig.private ? c.message!.id : undefined,
+        })
+        .catch(noop);
+    }
+  },
+});