start moderation module, readd tidy

src/modules/moderation.js

@@ -0,0 +1,85 @@
+const Command = require("../lib/command.js");
+const CATEGORY = "moderation";
+
+const {lookupUser} = require("../lib/utils.js");
+
+const tidy = new Command("tidy");
+tidy.addAlias("prune");
+tidy.addAlias("purge");
+tidy.category = CATEGORY;
+tidy.helpText = "Clean up messages";
+tidy.usage = "[subcommand] <count> <extra>";
+tidy.callback = async function (msg, line, subcommand, count, extra) {
+  if (!msg.channel.permissionsOf(msg.author.id).has("MANAGE_MESSAGES")) {
+    return "You do not have `Manage Messages` permission.";
+  }
+  if (!msg.channel.permissionsOf(hf.bot.user.id).has("MANAGE_MESSAGES")) {
+    return "I do not have `Manage Messages` permission.";
+  }
+
+  switch (subcommand) {
+    case "all": {
+      const messages = await msg.channel.getMessages({
+        after: msg.id,
+        limit: count && parseInt(count) > 0 ? parseInt(count) : 10,
+      });
+      await msg.channel.deleteMessages(
+        messages.map((m) => m.id),
+        `Message purge by ${msg.author.tag}`
+      );
+
+      return `Deleted ${messages.length} messages.`;
+    }
+    case "user": {
+      const user = await lookupUser(count);
+      if (typeof user === "string") {
+        return user;
+      } else {
+        const messages = await msg.channel.getMessages({
+          after: msg.id,
+          limit: extra && parseInt(extra) > 0 ? parseInt(extra) : 10,
+        });
+        await msg.channel.deleteMessages(
+          messages.filter((m) => m.author.id == user.id).map((m) => m.id),
+          `Message purge by ${msg.author.tag} targeting ${user.tag}`
+        );
+
+        return `Deleted ${messages.length} messages.`;
+      }
+    }
+    case "bots": {
+      const messages = await msg.channel.getMessages({
+        after: msg.id,
+        limit: count && parseInt(count) > 0 ? parseInt(count) : 50,
+      });
+      await msg.channel.deleteMessages(
+        messages.filter((m) => msg.author.bot).map((m) => m.id),
+        `Message purge by ${msg.author.tag} targeting bots`
+      );
+
+      return `Deleted ${messages.length} messages.`;
+    }
+    case "filter": {
+      if (count.length === 0)
+        return "Filter must be at least 1 character long.";
+
+      const messages = await msg.channel.getMessages({
+        after: msg.id,
+        limit: extra && parseInt(extra) > 0 ? parseInt(extra) : 10,
+      });
+      await msg.channel.deleteMessages(
+        messages.filter((m) => m.content.indexOf(count) > -1).map((m) => m.id),
+        `Message purge by ${msg.author.tag} targeting "${count}"`
+      );
+
+      return `Deleted ${messages.length} messages.`;
+    }
+    default:
+      return `__Usage__
+• \`all <count = 10>\` - Last \`count\` messages.
+• \`user [user] <count = 10>\` - Last \`count\` messages from \`user\`.
+• \`bots <count = 50>\` - Last \`count\` messages from bots.
+• \`filter [string] <count = 10>\` - Last \`count\` messages whose content matches \`string\`.`;
+  }
+};
+hf.registerCommand(tidy);