reduce slack message if success + use global slack webhook url (#196)

Signed-off-by: Nicolas Rol <[email protected]>

Author: rolnico

Diff for: .github/workflows/snapshot-ci.yml

@@ -203,15 +203,31 @@ jobs:
           formatted="${formatted%\\n}"  # Remove the last newline
           echo "formatted_results=${formatted}" >> $GITHUB_OUTPUT
 
-      - name: Send Slack Notification
-        uses: 8398a7/action-slack@28ba43ae48961b90635b50953d216767a6bea486 # v3.16.2
-        with:
-          author_name: 'powsybl-metrix on GitHub'
-          status: custom
-          custom_payload: |
-            {
-              attachments: [{
-                color: '${{ job.status }}' === 'success' ? "#319f4b" : '${{ job.status }}' === 'failure' ? "#f64538" : "#ffc965",
+      - name: Prepare Slack payload
+        id: prepare_payload
+        run: |
+          if [ "${{ steps.workflow_status.outputs.status }}" == "Successful" ]; then
+            echo 'payload<<EOF' >> $GITHUB_OUTPUT
+            echo '{
+              "attachments": [{
+                "color": "#319f4b",
+                "blocks": [
+                  {
+                    "type": "section",
+                    "text": {
+                      "type": "mrkdwn",
+                      "text": "${{ steps.workflow_status.outputs.icon }} *${{ steps.workflow_status.outputs.status }} workflow: Snapshot-CI on <https://github.com/powsybl/powsybl-metrix|powsybl-metrix>*\n\nBranch built: ${{ needs.build_powsybl_metrix.outputs.metrix-branch }}\nPowSyBl-Core version used: ${{ needs.build_powsybl_metrix.outputs.core-version }}\n\nSee logs on <https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}|GitHub>"
+                    }
+                  }
+                ]
+              }]
+            }' >> $GITHUB_OUTPUT
+            echo 'EOF' >> $GITHUB_OUTPUT
+          else
+            echo 'payload<<EOF' >> $GITHUB_OUTPUT
+            echo '{
+              "attachments": [{
+                "color": "#f64538",
                 "blocks": [
                   {
                     "type": "section",
@@ -232,6 +248,15 @@ jobs:
                   }
                 ]
               }]
-            }
+            }' >> $GITHUB_OUTPUT
+            echo 'EOF' >> $GITHUB_OUTPUT
+          fi
+
+      - name: Send Slack Notification
+        uses: 8398a7/action-slack@28ba43ae48961b90635b50953d216767a6bea486 # v3.16.2
+        with:
+          author_name: 'powsybl-metrix on GitHub'
+          status: custom
+          custom_payload: ${{ steps.prepare_payload.outputs.payload }}
         env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_METRIX }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_POWSYBL_WEBHOOK_URL }}