docs(03-02): complete callback query handling plan

Tasks completed: 3/3 - Task 1: Configure Telegram Trigger for callback queries - Task 2: Implement suggestion flow for no-match cases - Task 3: Handle suggestion callback and execute action SUMMARY: .planning/phases/03-container-actions/03-02-SUMMARY.md
2026-01-30 08:43:41 -05:00
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+---
+phase: 03-container-actions
+plan: 02
+subsystem: telegram-callbacks
+tags: [callback-query, inline-keyboard, telegram-api, n8n, http-request]
+
+# Dependency graph
+requires:
+  - phase: 03-01
+    provides: Basic container actions with match routing
+provides:
+  - Callback query handling for inline buttons
+  - Did-you-mean suggestion flow for typos
+  - 2-minute confirmation timeout
+  - Message cleanup after button clicks
+affects: [03-update-flow, 04-logs]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "HTTP Request node for Telegram inline keyboards (workaround for native node bug)"
+    - "Callback data JSON encoding with short keys for 64-byte limit"
+    - "Stateless confirmation via timestamp in callback_data"
+    - "answerCallbackQuery + deleteMessage for UI cleanup"
+
+key-files:
+  created: []
+  modified:
+    - n8n-workflow.json
+
+key-decisions:
+  - "Use HTTP Request for sendMessage with inline_keyboard (native Telegram node doesn't support dynamic keyboards)"
+  - "Encode action as single char (s/t/r/x) to fit in 64-byte callback_data limit"
+  - "2-minute timeout enforced client-side via timestamp comparison"
+  - "Delete suggestion message after any button click for clean UI"
+
+patterns-established:
+  - "Callback query routing: Route Update Type -> IF Callback Authenticated -> Parse Callback Data -> Route Callback"
+  - "Score-based fuzzy matching for suggestions (score >= 2 required)"
+  - "Three-branch callback handling: cancel, expired, execute"
+
+# Metrics
+duration: 15min
+completed: 2026-01-30
+---
+
+# Phase 03 Plan 02: Callback Query Handling Summary
+
+**Inline button infrastructure with did-you-mean suggestions using HTTP Request for Telegram API and stateless callback_data encoding**
+
+## Performance
+
+- **Duration:** 15 min
+- **Started:** 2026-01-30T13:27:00Z
+- **Completed:** 2026-01-30T13:42:00Z
+- **Tasks:** 3
+- **Files modified:** 1
+
+## Accomplishments
+- Telegram Trigger now receives both message and callback_query updates
+- Route Update Type switch separates message vs callback flows
+- IF Callback Authenticated validates user before processing callbacks
+- Find Closest Match scores containers and suggests best match for typos
+- Build Suggestion Keyboard creates inline_keyboard JSON with short callback_data
+- Send Suggestion uses HTTP Request to Telegram API (workaround for native node limitation)
+- Full callback flow: Parse -> Route -> Handle (Cancel/Expired/Execute)
+- Cancel: answer query "Cancelled", delete suggestion message
+- Expired: answer query with alert, delete message
+- Execute: run Docker action, answer query, delete message, send result
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Configure Telegram Trigger for callback queries** - `2cbf6e7` (feat)
+2. **Task 2: Implement suggestion flow for no-match cases** - `56eea26` (feat)
+3. **Task 3: Handle suggestion callback and execute action** - `768d758` (feat)
+
+## Files Created/Modified
+- `n8n-workflow.json` - Extended from 27 to 41 nodes with callback infrastructure:
+  - Route Update Type, IF Callback Authenticated (Task 1)
+  - Find Closest Match, Check Suggestion, Build Suggestion Keyboard, Send Suggestion (Task 2)
+  - Parse Callback Data, Route Callback, Handle Cancel/Expired, Build/Execute/Parse Callback Action, Answer/Delete/Send result (Task 3)
+
+## Decisions Made
+- Use HTTP Request node for sendMessage with inline_keyboard - native Telegram node has expression bug with dynamic keyboards
+- Encode action as single character (s=start, t=stop, r=restart, x=cancel) to fit callback_data 64-byte limit
+- Require minimum score of 2 for suggestions - prevents suggesting unrelated containers
+- 2-minute timeout enforced via timestamp in callback_data (stateless approach)
+- Delete suggestion message after any button click for clean chat UI
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- Single-container suggestion flow complete
+- Multiple-match batch confirmation still uses placeholder text (could be enhanced in future)
+- Ready for Phase 04: Logs & Intelligence
+- Container update flow (pull + recreate) deferred to later plan
+
+---
+*Phase: 03-container-actions*
+*Completed: 2026-01-30*