#73 added message-ts as an output

action.yml

@@ -16,6 +16,8 @@ inputs:
 outputs:
   time: # id of output
     description: 'The time'
+  message-ts: # timestamp on the message that was posted when using bot token
+    description: 'The timestamp on the message that was posted into Slack when using bot token'
 runs:
   using: 'node12'
   main: 'dist/index.js'

src/slack-send.js

@@ -31,6 +31,8 @@ module.exports = async function slackSend(core) {
 
     const payloadFilePath = core.getInput('payload-file-path');
 
+    let webResponse;
+
     if (payloadFilePath && !payload) {
       try {
         payload = await fs.readFile(path.resolve(payloadFilePath), 'utf-8');
@@ -68,7 +70,7 @@ module.exports = async function slackSend(core) {
 
       if (message.length > 0 || payload) {
         // post message
-        await web.chat.postMessage({ channel: channelId, text: message, ...(payload || {}) });
+        webResponse = await web.chat.postMessage({ channel: channelId, text: message, ...(payload || {}) });
       } else {
         console.log('Missing slack-message or payload! Did not send a message via chat.postMessage with botToken', { channel: channelId, text: message, ...(payload) });
         throw new Error('Missing message content, please input a valid payload or message to send. No Message has been send.');
@@ -114,6 +116,10 @@ module.exports = async function slackSend(core) {
 
     const time = (new Date()).toTimeString();
     core.setOutput('time', time);
+
+    if (webResponse && webResponse.ts !== undefined) {
+      core.setOutput('message-ts', webResponse.ts);
+    }
   } catch (error) {
     core.setFailed(error);
   }