WIP: Set up the test job to debug Mailcoach blog announcements

.github/workflows/test-job.yml

@@ -0,0 +1,96 @@
+name: "WIP: Test RSS check job"
+on: [push]
+jobs:
+  check-blog-changes:
+    name: Check for new blog posts to announce
+    runs-on: ubuntu-latest
+    container: httptoolkit/act-build-base:v3.0.0
+    outputs:
+      new-blog-post: ${{ steps.detect-changes.outputs.new-blog-post }}
+    steps:
+      - id: detect-changes
+        name: 'Check for RSS differences'
+        run: |
+          echo "new-blog-post=debug-failing-docker-container" >> "$GITHUB_OUTPUT"
+
+  announce-blog-changes:
+    name: Announce new blog posts
+    if: github.event_name == 'push' && needs.check-blog-changes.outputs.new-blog-post != ''
+    runs-on: ubuntu-latest
+    container: httptoolkit/act-build-base:v3.0.0
+    needs:
+      - check-blog-changes
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Send an email about the new blog post with Mailcoach
+        run: |
+          set -x
+
+          SLUG="${{ needs.check-blog-changes.outputs.new-blog-post }}"
+
+          URL="https://httptoolkit.com/blog/$SLUG/"
+
+          MARKDOWN=$(cat "src/posts/$SLUG.md")
+
+          echo "Parsing markdown..."
+
+          FRONTMATTER=$(echo "$MARKDOWN" | sed -n '/^---$/,/^---$/p')
+
+          # Get the title - stripping any surrounding quotes if required
+          TITLE=$(echo "$FRONTMATTER" |
+            sed -n 's/^title: //p' |
+            sed 's/^"//; s/"$//' |
+            sed "s/^'//; s/'$//"
+          )
+
+          # Get the post content, stripping out frontmatter:
+          CONTENT=$(echo  "$MARKDOWN" | sed '0,/^---$/d; 0,/^---$/d')
+
+          API_ENDPOINT="https://http-toolkit.mailcoach.app/api/campaigns"
+
+          echo "Creating campaign..."
+
+          # Create a Mailcoach campaign for this blog post email:
+          CAMPAIGN_ID=$(
+            curl \
+            -f -X POST $API_ENDPOINT \
+            -H "Authorization: Bearer $MAILCOACH_TOKEN" \
+            -H 'Accept: application/json' \
+            -H 'Content-Type: application/json' \
+            -d '{
+              "name": "Blog post: "'$TITLE'",
+              "email_list_uuid": "'$MAILING_LIST_UUID'",
+              "template_uuid": "'$EMAIL_TEMPLATE_ID'",
+              "fields": [
+                {
+                  "url": "'$URL'",
+                  "title": "'$TITLE'",
+                  "content": '$(echo "$CONTENT" | jq -R -r -s @json)'
+                }
+              ]
+            }'
+          )
+
+          echo "Sending test email..."
+
+          # Send a test email with this content immediately:
+          curl -f -X POST "$API_ENDPOINT/$CAMPAIGN_ID/send-test" \
+            -H "Authorization: Bearer $MAILCOACH_TOKEN" \
+            -H 'Accept: application/json' \
+            -H 'Content-Type: application/json' \
+            -d '{"email":"'$TEST_EMAIL'"}'
+
+          echo "Scheduling mailing list email..."
+
+          # Schedule the email to send in 3 hours:
+          curl -X PUT "$API_ENDPOINT/$CAMPAIGN_ID" \
+            -H "Authorization: Bearer $MAILCOACH_TOKEN" \
+            -H 'Accept: application/json' \
+            -H 'Content-Type: application/json' \
+            -d '{"schedule_at":"'$(date -u -d "3 hours" +"%Y-%m-%d %H:%M:%S")'"}'
+        env:
+          MAILCOACH_TOKEN: ${{ secrets.MAILCOACH_TOKEN }}
+          EMAIL_TEMPLATE_ID: ${{ vars.BLOG_POST_EMAIL_TEMPLATE_ID }}
+          MAILING_LIST_UUID: ${{ vars.BLOG_POST_MAILING_LIST_UUID }}
+          TEST_EMAIL: ${{ vars.BLOG_POST_TEST_EMAIL }}