Combine Knub's type helpers with Zeppelin's, continue Utility plugin port

backend/src/plugins/Utility/commands/SourceCmd.ts

@@ -0,0 +1,32 @@
+import { utilityCmd } from "../types";
+import { commandTypeHelpers as ct } from "../../../commandTypes";
+import { errorMessage } from "../../../utils";
+import { getBaseUrl } from "../../../pluginUtils";
+import moment from "moment-timezone";
+
+export const SourceCmd = utilityCmd({
+  trigger: "source",
+  description: "View the message source of the specified message id",
+  usage: "!source 534722219696455701",
+  permission: "can_source",
+
+  signature: {
+    messageId: ct.string(),
+  },
+
+  async run({ message: msg, args, pluginData }) {
+    const savedMessage = await pluginData.state.savedMessages.find(args.messageId);
+    if (!savedMessage) {
+      msg.channel.createMessage(errorMessage("Unknown message"));
+      return;
+    }
+
+    const source =
+      (savedMessage.data.content || "<no text content>") + "\n\nSource:\n\n" + JSON.stringify(savedMessage.data);
+
+    const archiveId = await pluginData.state.archives.create(source, moment().add(1, "hour"));
+    const baseUrl = getBaseUrl(pluginData);
+    const url = pluginData.state.archives.getUrl(baseUrl, archiveId);
+    msg.channel.createMessage(`Message source: ${url}`);
+  },
+});