oncall-generate

Trigger the on-call allocator Lambda to produce a fresh monthly rotation (Primary + Secondary per week), persist it to DynamoDB, then sync the result to the shared Google Calendar.

<Use_When>

• Slash command /codepresso:oncall-generate is invoked
• User says "generate next month's oncall", "다음달 온콜 만들어줘"
• Start of month and the next month's rotation hasn't been allocated yet </Use_When>

<Do_Not_Use_When>

• Only swapping a few weeks (use codepresso:oncall-swap)
• Only re-syncing existing DDB data to Calendar (use codepresso:oncall-sync-calendar) </Do_Not_Use_When>

Constants

• Lambda function: oncall-allocator-stack-OnCallAllocatorFunction-pQRyUZlV0CCh
• AWS Region: ap-northeast-2
• DynamoDB table: oncall-assignments-history
• Google Calendar ID: c_b96d007ccd3a348ceab92e4d7cab4be4ae91197da9f383a7a7bb0e4bd74f12f1@group.calendar.google.com

1. Ask the user which month to generate (default: next month).

2. Check DynamoDB if assignments already exist for that month:

   aws dynamodb scan --table-name oncall-assignments-history --region ap-northeast-2 \
     --filter-expression "begins_with(AssignmentDate, :prefix)" \
     --expression-attribute-values '{":prefix":{"S":"YYYY-MM"}}' \
     --select COUNT --output json
   

   If assignments exist, warn the user and ask for confirmation to overwrite.

3. Invoke the Lambda with the target month's first day:

   aws lambda invoke --function-name oncall-allocator-stack-OnCallAllocatorFunction-pQRyUZlV0CCh \
     --region ap-northeast-2 \
     --payload '{"time":"YYYY-MM-01T09:00:00Z"}' \
     --cli-binary-format raw-in-base64-out \
     /tmp/oncall-result.json && cat /tmp/oncall-result.json
   

4. Show the generated plan from the Lambda response.

5. After Lambda completes, sync to Google Calendar:

   • For each week in the plan, create an all-day event (Monday to Sunday) on the shared calendar using gcal_create_event:
     • summary: 온콜: {primary} (주) / {secondary} (부)
     • description: 주 담당자: {primary}\n부 담당자: {secondary}
     • calendarId: the Google Calendar ID above
     • start/end: use date format (all-day event) for Monday to Sunday
     • colorId: "11" (Tomato) for primary visibility
   • Before creating, check if events already exist for those dates and delete them first using gcal_list_events + gcal_delete_event.

6. Send confirmation to the user with the full schedule table.

<Tool_Usage>

• Bash for AWS CLI (aws dynamodb scan, aws lambda invoke)
• gcal_list_events, gcal_create_event, gcal_delete_event for calendar
• AskUserQuestion for month selection / overwrite confirmation </Tool_Usage>