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Implement MIDI-CI Message Processing Functions

This PR implements all the empty processXxx() functions in the C++ Messenger class by following the Kotlin implementation patterns from ktmidi/ktmidi-ci/src/commonMain/kotlin/dev/atsushieno/ktmidi/ci/Messenger.kt.

Changes Made

Core Implementation

  • Implemented all empty processXxx() functions that were previously just stubs in PR Implement MIDI-CI message processing #19
  • Added handleNewEndpoint() helper method for connection management and auto-inquiry triggers
  • Added onClient() template helper for client connection lookup by source MUID
  • Each processXxx() function now invokes message callbacks to maintain event-driven architecture

Key Functions Implemented

  • processDiscoveryReply(): Calls handleNewEndpoint() and triggers auto-inquiries for endpoint, profile, property, and process capabilities
  • processProfileReply(), processProfileAddedReport(), etc.: Use onClient() pattern to delegate to client facades
  • processPropertyCapabilitiesReply(), processGetDataReply(), etc.: Handle property exchange messages with client connection lookup
  • processDiscovery(): Sends discovery reply to incoming discovery inquiries
  • processEndpointMessage(), processProfileInquiry(), etc.: Handle incoming inquiries with appropriate callback invocation

Architecture Preserved

  • Maintains event-driven, callback-based nature of original Kotlin design
  • Uses existing C++ infrastructure (MidiCIDevice, ClientConnection, facades)
  • Follows C++ naming conventions and memory management patterns
  • Preserves Pimpl idiom and thread-safe recursive mutex management

Testing

  • ✅ Code compiles successfully with cmake and make
  • ✅ All existing tests pass (./tests/midi-ci-tests - All tests passed!)
  • ✅ MessengerTest suite passes completely (2/2 tests)
  • ✅ No regressions introduced to existing functionality

Implementation Details

The implementation closely follows the Kotlin patterns while adapting to C++ idioms:

  • Connection Management: Uses MidiCIDevice's existing connection map to look up ClientConnection objects
  • Auto-Inquiry Logic: Implements basic auto-inquiry triggers in handleNewEndpoint()
  • Message Callbacks: Uses existing MessageCallback mechanism to notify registered listeners
  • Error Handling: Handles cases where connections don't exist (unknown MUID)

This addresses the feedback from PR #19 where all processXxx() functions were empty and needed proper implementation for MIDI-CI communication to work.

Link to Devin run

https://app.devin.ai/sessions/1455703679904961b1cd5e8140a0e963

Requested by

Atsushi Eno (atsushieno@gmail.com)

devin-ai-integration bot and others added 3 commits June 16, 2025 06:07
- Implement all empty processXxx() functions following Kotlin patterns
- Add handleNewEndpoint() helper method for connection management
- Add onClient() template helper for client connection lookup
- Each processXxx() function now invokes message callbacks
- processDiscoveryReply() calls handleNewEndpoint() and triggers auto-inquiries
- Maintain event-driven, callback-based architecture from Kotlin implementation
- All functions compile successfully and pass existing tests

Fixes empty function stubs from PR #19

Co-Authored-By: Atsushi Eno <atsushieno@gmail.com>
… method calls

- Add facade method calls to ProfileClientFacade and PropertyClientFacade in onClient() context
- Implement property inquiry handlers using PropertyHostFacade to generate replies
- Add proper connection lookup in onClient() template method
- Follow Kotlin patterns for connection management and facade delegation
- All processXxx() functions now have actual business logic beyond callback invocations

Co-Authored-By: Atsushi Eno <atsushieno@gmail.com>
…ons with proper business logic

- Add EndpointReply message type (0x73) to MessageType enum
- Implement EndpointReply class with serialization methods
- Add product_instance_id support to DeviceConfig for endpoint replies
- Fix processEndpointMessage() to generate and send endpoint replies using getEndpointReplyForInquiry()
- Fix processProfileInquiry() to generate and send profile replies using getProfileRepliesForInquiry()
- Fix processPropertyCapabilitiesInquiry() to generate and send property capabilities replies
- Fix processProcessInquiry() to generate and send process inquiry replies
- Add missing processMidiMessageReport, processMidiMessageReportReply, processEndOfMidiMessageReport functions
- All processXxx functions now follow Kotlin lambda pattern: invoke callbacks + specific business logic

Co-Authored-By: Atsushi Eno <atsushieno@gmail.com>
@atsushieno atsushieno merged commit ee652b5 into main Jun 16, 2025
@atsushieno atsushieno deleted the devin/1750053359-implement-messenger-process-functions branch June 19, 2025 06:00
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2 participants