Implement room status change upon attach or detach #37
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WalkthroughThe changes involve significant updates to the Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant DefaultRoom
participant DefaultRoomStatus
User->>DefaultRoom: attach()
DefaultRoom->>DefaultRoomStatus: transition(to: .attached)
DefaultRoomStatus-->>DefaultRoom: status updated
DefaultRoom-->>User: Room is now attached
User->>DefaultRoom: detach()
DefaultRoom->>DefaultRoomStatus: transition(to: .detached)
DefaultRoomStatus-->>DefaultRoom: status updated
DefaultRoom-->>User: Room is now detached
Assessment against linked issues
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Files selected for processing (4)
- Sources/AblyChat/Room.swift (2 hunks)
- Sources/AblyChat/RoomStatus.swift (2 hunks)
- Tests/AblyChatTests/DefaultRoomStatusTests.swift (1 hunks)
- Tests/AblyChatTests/DefaultRoomTests.swift (2 hunks)
Additional context used
Learnings (1)
Sources/AblyChat/Room.swift (1)
Learnt from: lawrence-forooghian PR: ably-labs/ably-chat-swift#9 File: Sources/AblyChat/RoomStatus.swift:3-33 Timestamp: 2024-08-28T13:01:11.701Z Learning: When reviewing code, avoid commenting on TODOs that already have a linked GitHub issue, as per the user's preference.
Additional comments not posted (13)
Tests/AblyChatTests/DefaultRoomStatusTests.swift (3)
5-9: LGTM!The test function is correctly implemented and follows the AAA (Arrange-Act-Assert) pattern.
11-15: LGTM!The test function is correctly implemented and follows the AAA (Arrange-Act-Assert) pattern.
17-45: LGTM!The test function is correctly implemented and follows the AAA (Arrange-Act-Assert) pattern.
Sources/AblyChat/RoomStatus.swift (5)
4-4: LGTM!The change to make the
currentproperty an asynchronous getter is approved. It aligns with the PR objective and is necessary to support the asynchronous state management in theDefaultRoomStatusactor.
6-6: LGTM!The change to make the
errorproperty an asynchronous getter is approved. It aligns with the PR objective and is necessary to support the asynchronous state management in theDefaultRoomStatusactor.Note: The TODO comment to consider how to avoid the need for an unwrap is acknowledged. This can be revisited in a future PR.
7-7: LGTM!The change to make the
onChangemethod return aSubscription<RoomStatusChange>asynchronously is approved. It aligns with the PR objective and is necessary to support the asynchronous state management in theDefaultRoomStatusactor.
35-57: LGTM!The implementation of the
DefaultRoomStatusactor is approved. It correctly encapsulates the state management responsibilities, maintains the state, manages subscriptions, and provides a clean way to handle state transitions and notify subscribers.Note: The TODO comments to populate the
errorproperty and clean up old subscriptions are acknowledged. These can be addressed in future PRs.
43-47: LGTM!The implementation of the
onChangemethod within theDefaultRoomStatusactor is approved. The synchronous implementation is correct and necessary to maintain the state of subscriptions. Creating a new subscription, appending it to thesubscriptionsarray, and returning it to the caller is the appropriate approach.Sources/AblyChat/Room.swift (3)
53-55: LGTM!The code changes are approved for the following reasons:
- Encapsulating the status management within the actor enhances data hiding and control over the status state.
- Changing the
statusproperty frompublictointernalis a good practice to limit the visibility of the property.
73-73: LGTM!The code changes are approved for the following reason:
- Updating the status to
.attachedduring the attachment process ensures that the status of the room reflects the current state of the room more accurately.
80-80: LGTM!The code changes are approved for the following reason:
- Updating the status to
.detachedduring the detachment process ensures that the status of the room reflects the current state of the room more accurately.Tests/AblyChatTests/DefaultRoomTests.swift (2)
21-23: LGTM!The code changes are approved. The addition of the subscription to listen for status changes and the assertion to ensure that the room's status transitions to
.attachedafter theattachmethod is called improve the robustness of the test by ensuring that the room's state is accurately reflected and validated during the attach process.Also applies to: 27-27, 31-38
87-89: LGTM!The code changes are approved. The addition of the subscription to listen for status changes and the assertion to ensure that the room's status transitions to
.detachedafter thedetachmethod is called improve the robustness of the test by ensuring that the room's state is accurately reflected and validated during the detach process.Also applies to: 93-93, 97-104
Based on the simplified requirements described in #19. The decision from 7d6acde to use actors as the mechanism for managing mutable state means that I’ve had to make RoomStatus.{ current, error, onChange(bufferingPolicy:) } async. As mentioned there, if later on we decide this is too weird an API, then we can think of alternatives. I really wanted to avoid making DefaultRoomStatus an actor; I tried to find a way to isolate this state to the DefaultRoom actor (who logically owns this state), by trying to make the DefaultRoomStatus access the DefaultRoom-managed state, but I was not successful and didn’t want to sink much time into it. It means that DefaultRoom has suspension points in order to access its current state, which I am not happy about. But we can revisit later, perhaps armed with more knowledge of concurrency and in less of a rush to get some initial functionality implemented. Resolves #19.
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Files selected for processing (4)
- Sources/AblyChat/Room.swift (3 hunks)
- Sources/AblyChat/RoomStatus.swift (2 hunks)
- Tests/AblyChatTests/DefaultRoomStatusTests.swift (1 hunks)
- Tests/AblyChatTests/DefaultRoomTests.swift (2 hunks)
Files skipped from review as they are similar to previous changes (4)
- Sources/AblyChat/Room.swift
- Sources/AblyChat/RoomStatus.swift
- Tests/AblyChatTests/DefaultRoomStatusTests.swift
- Tests/AblyChatTests/DefaultRoomTests.swift
Based on the simplified requirements described in #19.
The decision from 7d6acde to use actors as the mechanism for managing mutable state means that I’ve had to make
RoomStatus.{ current, error, onChange(bufferingPolicy:) }async. As mentioned there, if later on we decide this is too weird an API, then we can think of alternatives.I really wanted to avoid making
DefaultRoomStatusan actor; I tried to find a way to isolate this state to theDefaultRoomactor (who logically owns this state), by trying to make theDefaultRoomStatusaccess theDefaultRoom-managed state, but I was not successful and didn’t want to sink much time into it. It means thatDefaultRoomhas suspension points in order to access its current state, which I am not happy about. But we can revisit later, perhaps armed with more knowledge of concurrency and in less of a rush to get some initial functionality implemented.Resolves #19.
Summary by CodeRabbit
New Features
Bug Fixes
Tests
DefaultRoomStatusclass to validate initialization and state transitions.DefaultRoomclass to verify status changes during attach and detach processes.