Ryan Chen
f5f661acba
Tasks completed: 2/2 - Task 1: IMAP connection service with authentication and folder listing - Task 2: Email body parser for multipart MIME messages SUMMARY: .planning/phases/01-foundation/01-02-SUMMARY.md
136 lines
4.5 KiB
Markdown
136 lines
4.5 KiB
Markdown
---
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phase: 01-foundation
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plan: 02
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subsystem: email
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tags: [imap, aioimaplib, email-parsing, html2text, rfc822]
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# Dependency graph
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requires:
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- phase: 01-01
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provides: Email database models with encrypted credentials
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provides:
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- IMAP connection service with authentication and folder listing
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- Email body parser for multipart MIME messages
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- Dependencies: aioimaplib and html2text
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affects: [01-03, 01-04, email-sync, account-management]
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# Tech tracking
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tech-stack:
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added: [aioimaplib>=2.0.1, html2text>=2025.4.15]
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patterns: [async IMAP client, modern EmailMessage API, HTML-to-text conversion]
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key-files:
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created:
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- blueprints/email/imap_service.py
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- blueprints/email/parser_service.py
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modified:
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- pyproject.toml
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key-decisions:
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- "Use aioimaplib for async IMAP4_SSL operations"
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- "Prefer plain text over HTML for RAG indexing"
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- "Use logout() not close() for proper TCP cleanup"
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- "Modern EmailMessage API with email.policy.default"
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patterns-established:
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- "IMAP connection lifecycle: connect → operate → logout in finally block"
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- "Email parsing: message_from_bytes with policy=default, get_body() for multipart handling"
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- "HTML conversion: html2text with ignore_links=False for context preservation"
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# Metrics
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duration: 13min
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completed: 2026-02-08
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---
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# Phase 01 Plan 02: IMAP Connection & Email Parsing Summary
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**Async IMAP client with aioimaplib for server authentication and folder listing, plus RFC822 email parser extracting text/HTML bodies using modern EmailMessage API**
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## Performance
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- **Duration:** 13 minutes
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- **Started:** 2026-02-08T14:48:15Z
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- **Completed:** 2026-02-08T15:01:33Z
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- **Tasks:** 2/2
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- **Files modified:** 3
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## Accomplishments
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- IMAP connection service with async authentication and proper cleanup
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- Email body parser handling multipart MIME messages with text/HTML extraction
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- Dependencies added to pyproject.toml (aioimaplib, html2text)
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- Modern EmailMessage API usage with proper encoding handling
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- HTML-to-text conversion when plain text unavailable
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: IMAP connection service** - `6e4ee6c` (feat)
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2. **Task 2: Email body parser** - `e408427` (feat)
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## Files Created/Modified
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- `blueprints/email/imap_service.py` - IMAPService class with connect/list_folders/close methods
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- `blueprints/email/parser_service.py` - parse_email_body function for RFC822 parsing
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- `pyproject.toml` - Added aioimaplib>=2.0.1 and html2text>=2025.4.15
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## Decisions Made
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**1. IMAP Connection Lifecycle**
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- **Decision:** Use `logout()` not `close()` for proper TCP cleanup
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- **Rationale:** `close()` only closes the selected mailbox, `logout()` closes TCP connection
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- **Impact:** Prevents connection leaks and quota exhaustion
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**2. Email Body Preference**
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- **Decision:** Prefer plain text over HTML for "preferred" field
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- **Rationale:** Plain text has less boilerplate, better for RAG indexing
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- **Alternative:** Always convert HTML to text
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- **Outcome:** Use plain text when available, convert HTML only when needed
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**3. Modern Email API**
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- **Decision:** Use `email.policy.default` and `get_body()` method
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- **Rationale:** Modern API handles encoding automatically, simplifies multipart handling
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- **Alternative:** Legacy `Message.walk()` and `get_payload()`
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- **Outcome:** Proper decoding, fewer encoding errors
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## Deviations from Plan
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None - plan executed exactly as written.
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All tasks completed according to specification. No bugs discovered, no critical functionality missing, no architectural changes required.
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## Issues Encountered
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None - implementation followed research patterns directly.
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The RESEARCH.md provided complete patterns for both IMAP connection and email parsing, eliminating guesswork and enabling straightforward implementation.
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## User Setup Required
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None - no external service configuration required.
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Dependencies will be installed in Docker environment via pyproject.toml. No API keys or credentials needed at this phase.
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## Next Phase Readiness
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**Phase 2: Account Management** is ready to begin.
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**Ready:**
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- ✅ IMAP service can connect to mail servers
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- ✅ Email parser can extract bodies from RFC822 messages
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- ✅ Dependencies added to project
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- ✅ Patterns established for async IMAP operations
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**What Phase 2 needs:**
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- Use IMAPService to test IMAP connections
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- Use parse_email_body to extract email content during sync
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- Import: `from blueprints.email.imap_service import IMAPService`
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- Import: `from blueprints.email.parser_service import parse_email_body`
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**No blockers or concerns.**
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---
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*Phase: 01-foundation*
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*Completed: 2026-02-08*
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