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[ECO-4952] Start implementing room lifecycle spec #13

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Note: This is based on top of ably-labs#60; please review that one first.

This is based on ably/specification#200 at b4a495e. It’s generated some questions, which I’ve asked on that PR.

Note that the spec has been through a few revisions since I started implementing this; I’ve tried to keep everything in sync but some older stuff might still be accidentally there.

I’ve implemented most of the specified behaviour for the ATTACH, DETACH, and RELEASE operations. I have not yet implemented RETRY since it’s quite different to those three and I wanted to get eyes on this first chunk of work; have created ably-labs#51 for implementing it.

Of the operations that I have implemented, I have not implemented the following (this is accurately reflected by the @spec… tags in the tests):

The room lifecycle manager introduced by this commit is currently a standalone object, which is not integrated with the rest of the SDK. I’ve created ably-labs#47 for doing this integration work.

The @spec… tags are based on the on the JS rules @ 8c9ce8b, but I camel-cased them and also decided that:

  • if a test doesn't relate to a spec point, it doesn't need any markers
  • there should be a way to know that a spec point is tested across multiple tests
  • there should be a way of marking a spec point as implemented but not tested (so that can show up differently in reporting; important given that we’re also going to use this report as a to-do list of what still needs to be implemented)

Part of ably-labs#28.

Summary by CodeRabbit

Summary by CodeRabbit

  • New Features

    • Introduced new error codes for improved error handling in the chat SDK.
    • Added a new section in the contribution guidelines for better test documentation related to SDK features.
    • Implemented a RoomLifecycleManager to manage chat room contributor states effectively.
    • Added a SimpleClock protocol to facilitate asynchronous task management in testing.
    • Introduced a mock implementation of RoomLifecycleContributorChannel for testing purposes.
  • Bug Fixes

    • Enhanced error reporting for attachment and detachment failures within the chat SDK.
  • Tests

    • Added comprehensive unit tests for the RoomLifecycleManager to ensure robust lifecycle management of chat rooms.
    • Introduced mock implementations to facilitate controlled testing scenarios.
    • Improved assertion capabilities in the testing framework for better error handling validation.

This is based on [1] at b4a495e. It’s generated some questions, which
I’ve asked on that PR.

Note that the spec has been through a few revisions since I started
implementing this; I’ve tried to keep everything in sync but some older
stuff might still be accidentally there.

I’ve implemented most of the specified behaviour for the ATTACH, DETACH,
and RELEASE operations. I have not yet implemented RETRY since it’s
quite different to those three and I wanted to get eyes on this first
chunk of work; have created ably-labs#51 for implementing it.

Of the operations that I have implemented, I have not implemented the
following (this is accurately reflected by the @SPEC… tags in the
tests):

- Lifecycle behaviour that relates to another ongoing operation (created
  ably-labs#52)

- Lifecycle behaviour relating to “transient disconnect timeouts”
  (created ably-labs#48)

- Lifecycle behaviour that occurs “asynchronously” outside an operation
  (created ably-labs#50)

- CHA-RL1g2, which refers to emitting “discontinuity events” which are a
  concept not yet implemented; this will come in ably-labs#53.

The room lifecycle manager introduced by this commit is currently a
standalone object, which is not integrated with the rest of the SDK.
I’ve created ably-labs#47 for doing this integration work.

The @SPEC… tags are based on the on the JS rules [2] @ 8c9ce8b, but I
camel-cased them and also decided that:

- if a test doesn't relate to a spec point, it doesn't need any markers

- there should be a way to know that a spec point is tested across
  multiple tests

- there should be a way of marking a spec point as implemented but not
  tested (so that can show up differently in reporting; important given
  that we’re also going to use this report as a to-do list of what still
  needs to be implemented)

Part of ably-labs#28.

[1] ably/specification#200
[2] https://github.com/ably/ably-js/blob/main/CONTRIBUTING.md#tests-alignment-with-the-ably-features-specification
@ruancomelli
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This is an experiment review for experiment multiple_mermaid_diagram_types
Run ID: multiple_mermaid_diagram_types/run_2024-09-26T16-03-48_v1-23-0-21-g3eb85d2d2
The benchmark review for this pull request can be found at #11.
This pull request was cloned from https://github.com/ably-labs/ably-chat-swift/pull/54. (Note: the URL is not a link to avoid triggering a notification on the original pull request.)

Experiment configuration
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  ai_review_config:
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      comment_area_model: benchmark
      comment_validation_model: benchmark
      comment_suggestion_model: benchmark
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# The pull request dataset to run the experiment on
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    # CodeRabbit examples:
- https://github.com/2lambda123/-Orange-OpenSource-oorobot/pull/15
- https://github.com/2lambda123/galaxyproject-galaxy/pull/12
- https://github.com/a0v0/avtoolz/pull/79
- https://github.com/adityask98/Hotaru/pull/10
- https://github.com/agdas/vscode/pull/2
- https://github.com/agluszak/hirschgarten/pull/2
- https://github.com/alexsnow348/insightface/pull/46
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- https://github.com/AngeloTadeucci/Maple2.File/pull/36
- https://github.com/AngeloTadeucci/Maple2/pull/233
    # Examples where CodeRabbit does not generate diagrams
- https://github.com/baptisteArno/typebot.io/pull/1778
- https://github.com/btipling/foundations/pull/33
- https://github.com/btipling/foundations/pull/31
- https://github.com/chintu-777/jaeger/pull/1
- https://github.com/coji/remix-docs-ja/pull/55
- https://github.com/DaveMBush/SmartNgRX/pull/622
- https://github.com/DaveMBush/SmartNgRX/pull/481
- https://github.com/dkittle/party-connections/pull/6
- https://github.com/Drajad-Kusuma-Adi/onstudy-backend/pull/6
- https://github.com/imaami/libcanth/pull/2
    # Requested by Tim
- https://github.com/2lambda123/-Orange-OpenSource-oorobot/pull/15
- https://github.com/2lambda123/galaxyproject-galaxy/pull/12
- https://github.com/a0v0/avtoolz/pull/79
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- https://github.com/agdas/vscode/pull/2
- https://github.com/agluszak/hirschgarten/pull/2
- https://github.com/4DNucleome/PartSeg/pull/1183
- https://github.com/ably/ably-cocoa/pull/1973
- https://github.com/ably-labs/ably-chat-swift/pull/54
- https://github.com/ably-labs/ably-chat-swift/pull/35
  # Including database changes to evaluate entity-relationship diagrams
- https://github.com/sourcery-ai/core/pull/4579
  # TODO: find some with Alembic

# Questions to ask to label the review comments
review_comment_labels: []
# - label: correct
#   question: Is this comment correct?

# Benchmark reviews generated by running
#   python -m scripts.experiment benchmark <experiment_name>
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  review_pull_request: https://github.com/sourcery-ai-experiments/vscode/pull/15
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  review_pull_request: https://github.com/sourcery-ai-experiments/hirschgarten/pull/14
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- dataset_pull_request: https://github.com/sourcery-ai/core/pull/4579
  review_pull_request: https://github.com/sourcery-ai-experiments/core/pull/377

@SourceryAI
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SourceryAI commented Sep 26, 2024

Reviewer's Guide by Sourcery

This pull request implements a significant portion of the room lifecycle specification for the Ably Chat SDK. It introduces a new RoomLifecycleManager class that manages the lifecycle of chat rooms, including the ATTACH, DETACH, and RELEASE operations. The implementation follows the specification closely, handling various states and error conditions as defined in the spec.

Sequence Diagrams

State diagram for RoomLifecycleManager

stateDiagram-v2
    [*] --> INITIALIZED
    INITIALIZED --> ATTACHING: ATTACH
    ATTACHING --> ATTACHED: Success
    ATTACHING --> SUSPENDED: Failure (some cases)
    ATTACHING --> FAILED: Failure (some cases)
    ATTACHED --> DETACHING: DETACH
    DETACHING --> DETACHED: Success
    DETACHING --> FAILED: Failure
    DETACHED --> RELEASING: RELEASE
    RELEASING --> RELEASED: Success
    RELEASED --> [*]
    SUSPENDED --> ATTACHING: ATTACH
    FAILED --> [*]
Loading

Sequence diagram for ATTACH operation

sequenceDiagram
    participant C as Client
    participant RLM as RoomLifecycleManager
    participant CC as ContributorChannels

    C->>RLM: performAttachOperation()
    RLM->>RLM: Change status to ATTACHING
    loop For each contributor
        RLM->>CC: attach()
        alt Success
            CC-->>RLM: Success
        else Failure
            CC-->>RLM: Error
            RLM->>RLM: Handle error (change status, detach others)
            RLM-->>C: Throw error
        end
    end
    RLM->>RLM: Change status to ATTACHED
    RLM-->>C: Success
Loading

File-Level Changes

Change Details Files
Implemented room lifecycle management
  • Created RoomLifecycleManager class to handle room lifecycle operations
  • Implemented ATTACH operation with error handling and state transitions
  • Implemented DETACH operation with error handling and state transitions
  • Implemented RELEASE operation with error handling and state transitions
  • Added support for multiple contributors (channels) in the lifecycle management
Sources/AblyChat/RoomLifecycleManager.swift
Enhanced error handling for the Chat SDK
  • Added new error codes for attachment and detachment failures
  • Implemented ChatError enum for more detailed error information
  • Updated ARTErrorInfo extension to include cause information
Sources/AblyChat/Errors.swift
Added comprehensive unit tests for RoomLifecycleManager
  • Created test cases for ATTACH, DETACH, and RELEASE operations
  • Implemented tests for various error scenarios and state transitions
  • Added mock implementations for testing purposes
Tests/AblyChatTests/RoomLifecycleManagerTests.swift
Tests/AblyChatTests/Mocks/MockRoomLifecycleContributorChannel.swift
Tests/AblyChatTests/Mocks/MockSimpleClock.swift
Updated contribution guidelines
  • Added instructions for attributing tests to spec points
  • Introduced @SPEC, @specOneOf, and @specPartial tags for test documentation
CONTRIBUTING.md
Introduced new utility types and protocols
  • Created RoomLifecycleContributorChannel protocol
  • Added SimpleClock protocol for mocking time-based operations
  • Defined RoomFeature enum to represent chat room features
Sources/AblyChat/RoomLifecycleManager.swift
Sources/AblyChat/SimpleClock.swift
Sources/AblyChat/RoomFeature.swift

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Hey @ruancomelli - I've reviewed your changes - here's some feedback:

Overall Comments:

  • Consider breaking down longer methods like performAttachOperation() and performDetachOperation() into smaller, more focused functions for improved readability and maintainability.
  • Great job on the comprehensive test coverage and use of mocks for controlled testing scenarios. This will greatly aid in maintaining the codebase as it evolves.
Here's what I looked at during the review
  • 🟢 General issues: all looks good
  • 🟢 Documentation: all looks good

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3 participants