Fix #18 - Enable passing JSON payload to Slack App Route

example-workflows/Bot token post to channel/JSONTextPayload.yml

@@ -0,0 +1,15 @@
+on: [push]
+
+jobs:
+  new_push_job:
+    runs-on: ubuntu-latest
+    name: New push to repo
+    steps:
+    - name: Send GitHub trigger payload to Slack Workflow Builder
+      id: slack
+      uses: slackapi/slack-github-action@v1.15.0
+      with:
+        channel-id: 'SLACK_CHANNEL_ID' # ID of Slack Channel you want to post to
+        payload: "{\"text\":\"posting from a github action\"}"
+      env:
+        SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}

example-workflows/Bot token post to channel/customJSONPayload.yml

@@ -0,0 +1,47 @@
+on: [push]
+
+jobs:
+  new_push_job:
+    runs-on: ubuntu-latest
+    name: New push to repo
+    steps:
+    - name: Send GitHub trigger payload to Slack Workflow Builder
+      id: slack
+      uses: slackapi/slack-github-action@v1.15.0
+      with:
+        channel-id: 'SLACK_CHANNEL_ID' # ID of Slack Channel you want to post to
+        payload: |
+          {
+            "blocks": [
+              { "type": "divider" },
+              {
+                "type": "image",
+                "title": {
+                  "type": "plain_text",
+                  "text": "Slack Slack Slack",
+                  "emoji": true
+                },
+                "image_url": "https://media.makeameme.org/created/a-slack-this.jpg",
+                "alt_text": "marg"
+              },
+              {
+                "type": "actions",
+                "elements": [
+                  {
+                    "type": "button",
+                    "text": {
+                      "type": "plain_text",
+                      "text": $values.button_text
+                    },
+                    "url": $values.button_url
+                  }
+                ]
+              }
+            ],
+            channel-id": "NEW_TARGET_CHANNEL_ID"
+          }
+      env:
+        SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
+      values: |
+        button_text: ${{ github.sha }}
+        button_url: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}

index.js

@@ -13,35 +13,37 @@ try {
         throw 'Need to provide at least one botToken or webhookUrl'
     }
 
+    if(payload) {
+        try {
+            // confirm it is valid json
+            payload = JSON.parse(payload);
+        } catch (e) {
+            // passed in payload wasn't valid json
+            console.error("passed in payload was invalid JSON")
+            throw 'Need to provide valid JSON payload'
+        }
+    }
+
     if (typeof botToken !== 'undefined' && botToken.length > 0) {
         const message = core.getInput('slack-message');
         const channelId = core.getInput('channel-id');
         const web = new WebClient(botToken);
 
-        if(channelId.length > 0 && message.length > 0) {
+        if(channelId.length > 0 && (message.length > 0 || payload)) {
             // post message
-            web.chat.postMessage({text: message, channel: channelId});
+            web.chat.postMessage({channel: channelId, text: message, ...(payload || {})});
         } else {
-            console.log('missing either channel-id or slack-message! Did not send a message via chat.postMessage with botToken');
+            console.log('missing either channel-id, slack-message or payload! Did not send a message via chat.postMessage with botToken');
         }
-    } 
-    
+    }
+
     if (typeof webhookUrl !== 'undefined' && webhookUrl.length > 0) {
 
-        if (payload.length < 1) {
+        if (!payload) {
             // No Payload was passed in
             console.log('no custom payload was passed in, using default payload that triggered the GitHub Action')
             // Get the JSON webhook payload for the event that triggered the workflow
             payload = github.context.payload;
-        } else {
-            try {
-                // confirm it is valid json
-                payload = JSON.parse(payload);
-            } catch (e) {
-                // passed in payload wasn't valid json
-                console.error("passed in payload was invalid JSON")
-                throw 'Need to provide valid JSON payload'
-            }
         }
 
         // flatten JSON payload (no nested attributes)