feat(slack): add bot capability in send message action

packages/backend/src/apps/slack/actions/send-a-message-to-channel/index.ts

@@ -32,13 +32,46 @@ export default defineAction({
       description: 'The content of your new message.',
       variables: true,
     },
+    {
+      label: 'Send as a bot?',
+      key: 'sendAsBot',
+      type: 'dropdown' as const,
+      required: false,
+      value: false,
+      description: 'If you choose no, this message will appear to come from you. Direct messages are always sent by bots.',
+      variables: false,
+      options: [
+        {
+          label: 'Yes',
+          value: true,
+        },
+        {
+          label: 'No',
+          value: false,
+        }
+      ]
+    },
+    {
+      label: 'Bot name',
+      key: 'botName',
+      type: 'string' as const,
+      required: true,
+      value: 'Automatisch',
+      description: 'Specify the bot name which appears as a bold username above the message inside Slack. Defaults to Automatisch.',
+      variables: true,
+    },
+    {
+      label: 'Bot icon',
+      key: 'botIcon',
+      type: 'string' as const,
+      required: false,
+      description: 'Either an image url or an emoji available to your team (surrounded by :). For example, https://example.com/icon_256.png or :robot_face:',
+      variables: true,
+    },
   ],
 
   async run($) {
-    const channelId = $.step.parameters.channel as string;
-    const text = $.step.parameters.message as string;
-
-    const message = await postMessage($, channelId, text);
+    const message = await postMessage($);
 
     return message;
   },

packages/backend/src/apps/slack/actions/send-a-message-to-channel/post-message.ts

@@ -1,23 +1,54 @@
 import { IGlobalVariable } from '@automatisch/types';
+import { URL } from 'url';
 
-const postMessage = async (
-  $: IGlobalVariable,
-  channelId: string,
-  text: string
-) => {
-  const params = {
+type TData = {
+  channel: string;
+  text: string;
+  username?: string;
+  icon_url?: string;
+  icon_emoji?: string;
+}
+
+const postMessage = async ($: IGlobalVariable) => {
+  const { parameters } = $.step;
+  const channelId = parameters.channel as string;
+  const text = parameters.message as string;
+  const sendAsBot = parameters.sendAsBot as boolean;
+  const botName = parameters.botName as string;
+  const botIcon = parameters.botIcon as string;
+
+  const data: TData = {
     channel: channelId,
     text,
   };
 
-  const response = await $.http.post('/chat.postMessage', params);
+  if (sendAsBot) {
+    data.username = botName;
+    try {
+      // challenging the input to check if it is a URL!
+      new URL(botIcon);
+      data.icon_url = botIcon;
+    } catch {
+      data.icon_emoji = botIcon;
+    }
+  }
+
+  const customConfig = {
+    sendAsBot,
+  };
+
+  const response = await $.http.post(
+    '/chat.postMessage',
+    data,
+    { additionalProperties: customConfig },
+  );
 
   if (response.data.ok === false) {
     throw new Error(JSON.stringify(response.data));
   }
 
   const message = {
-    raw: response?.data?.message,
+    raw: response?.data,
   };
 
   $.setActionItem(message);