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[ECO-4952] Start implementing room lifecycle spec #15

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ruancomelli
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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#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#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#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#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#52)

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

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

- CHA-RL1g2, which refers to emitting “discontinuity events” which are a
  concept not yet implemented; this will come in ably#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#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#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_2024-09-30T09-03-13_v1-23-0-35-g6ed6a52fb
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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# The pull request dataset to run the experiment on
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- https://github.com/sourcery-ai/core/pull/4631
- https://github.com/sourcery-ai/core/pull/4647
  # CodeRabbit examples:
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- https://github.com/2lambda123/galaxyproject-galaxy/pull/12
- https://github.com/a0v0/avtoolz/pull/79
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- https://github.com/agluszak/hirschgarten/pull/2
- https://github.com/alexsnow348/insightface/pull/46
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- https://github.com/AngeloTadeucci/Maple2/pull/239
- 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
- https://github.com/adityask98/Hotaru/pull/10
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- 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
  # A ton of new classes:
- https://github.com/sourcery-ai/core/pull/4618
  # Including database changes to evaluate entity-relationship diagrams
- https://github.com/sourcery-ai/core/pull/4579
  # TODO: find some with Alembic
  # Brilliant existing examples:
- https://github.com/sourcery-ai/core/pull/4680
- https://github.com/sourcery-ai/core/pull/4684

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

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#   python -m scripts.experiment benchmark <experiment_name>
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@SourceryAI
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SourceryAI commented Sep 30, 2024

Reviewer's Guide by Sourcery

This pull request implements the initial room lifecycle management functionality for the Ably Chat SDK. It introduces a RoomLifecycleManager class that handles the ATTACH, DETACH, and RELEASE operations for chat rooms, following the specifications outlined in the Ably Chat SDK features spec. The implementation includes error handling, state transitions, and retry mechanisms for various scenarios.

Diagrams

State diagram for RoomLifecycleManager

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

Sequence diagram for ATTACH operation

sequenceDiagram
    participant C as Client
    participant R as RoomLifecycleManager
    participant Co as Contributors
    C->>R: performAttachOperation()
    R->>R: changeStatus(to: .attaching)
    loop For each contributor
        R->>Co: attach()
        alt Success
            Co-->>R: Success
        else Failure
            Co-->>R: Error
            R->>R: Handle error
        end
    end
    R->>R: changeStatus(to: .attached)
    R-->>C: Operation result
Loading

File-Level Changes

Change Details Files
Implement room lifecycle management
  • Create RoomLifecycleManager class to handle room operations
  • Implement ATTACH operation with error handling and state transitions
  • Implement DETACH operation with error handling and retry mechanism
  • Implement RELEASE operation with contributor detachment
  • Add support for multiple contributors in room lifecycle
  • Implement status change notifications for room state transitions
Sources/AblyChat/RoomLifecycleManager.swift
Tests/AblyChatTests/RoomLifecycleManagerTests.swift
Extend error handling for room operations
  • Add new error codes for attachment and detachment failures
  • Implement ChatError enum for detailed error information
  • Update ARTErrorInfo extension to include chat-specific errors
Sources/AblyChat/Errors.swift
Introduce mocks and helpers for testing
  • Create MockRoomLifecycleContributorChannel for simulating channel behavior
  • Implement MockSimpleClock for controlling time-based operations in tests
  • Add helper functions for testing chat errors
Tests/AblyChatTests/Mocks/MockRoomLifecycleContributorChannel.swift
Tests/AblyChatTests/Mocks/MockSimpleClock.swift
Tests/AblyChatTests/Helpers/Helpers.swift
Update contribution guidelines
  • Add instructions for attributing tests to spec points
  • Introduce @SPEC, @specOneOf, and @specPartial tags for test documentation
  • Add guidelines for marking untested spec points
CONTRIBUTING.md

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

Overall Comments:

  • Consider addressing the TODO comments related to error codes and task cancellations to ensure robustness before merging.
  • Ensure thorough testing of all error handling paths, particularly for the ATTACH and DETACH operations, as these are critical for lifecycle management.
  • Provide more clarity on the outstanding questions related to the specification to ensure the implementation aligns correctly with the intended behavior.
Here's what I looked at during the review
  • 🟡 General issues: 1 issue found
  • 🟡 Documentation: 1 issue found

LangSmith trace

Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.

case .roomIsReleased:
.roomIsReleased
}
}

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suggestion: Extract repetitive code in localizedDescription into a separate method

The switch statements for attachment and detachment failures contain similar code. Consider extracting this logic into a separate method to reduce duplication and improve maintainability.

Comment on lines +49 to +52
```swift
// @spec CHA-EX3f
func test1 { … }
```

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suggestion (documentation): Consider adding language-specific syntax highlighting to code blocks

Using syntax highlighting for Swift code blocks (swift instead of just ) could improve readability and make the documentation more polished.

@ruancomelli ruancomelli closed this Oct 1, 2024
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3 participants