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[ECO-4982] Implement room release #107

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merged 2 commits into from
Nov 12, 2024
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@lawrence-forooghian lawrence-forooghian commented Nov 12, 2024

Note: This PR is based on top of #106; please review that one first.

This implements the DefaultRooms.release(roomID:) method. See commit messages for more details.

Part of #47.

Summary by CodeRabbit

Release Notes

  • New Features

    • Introduced a new InternalRoom protocol with enhanced room management capabilities.
    • Added a release() method for proper cleanup of rooms.
    • Implemented a MockRoomFactory for easier testing of room creation.
  • Bug Fixes

    • Improved error handling in the room release process to prevent errors when rooms do not exist.
  • Tests

    • Expanded test coverage for room functionalities, including new tests for the release() method and integration tests for room lifecycle management.

We want to be able to mock out the upcoming `Room.release()` method.
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📥 Commits

Reviewing files that changed from the base of the PR and between fb0f60c and 8daa191.

Walkthrough

The pull request modifies the DefaultChatClient and related classes to implement a new factory pattern for room management. The rooms property in DefaultChatClient now utilizes DefaultRoomFactory instead of DefaultRoomLifecycleManagerFactory. Additionally, a new internal protocol InternalRoom is introduced, along with a RoomFactory protocol for creating room instances. The DefaultRoom class conforms to InternalRoom, implementing a new release() method. Other changes include updates to lifecycle management methods and tests to ensure proper functionality.

Changes

File Change Summary
Sources/AblyChat/ChatClient.swift Updated rooms initialization to use DefaultRoomFactory(). connection and clientID properties remain unimplemented.
Sources/AblyChat/Room.swift Added InternalRoom protocol with release() method. Introduced RoomFactory protocol and DefaultRoomFactory class. Modified DefaultRoom to conform to InternalRoom.
Sources/AblyChat/RoomLifecycleManager.swift Added performReleaseOperation() method to RoomLifecycleManager protocol. Updated existing method to be private.
Sources/AblyChat/Rooms.swift Changed DefaultRooms to use RoomFactory instead of LifecycleManagerFactory. Updated rooms dictionary type and initializer accordingly.
Tests/AblyChatTests/DefaultChatClientTests.swift Updated type cast for rooms property in tests to reflect new factory type.
Tests/AblyChatTests/DefaultRoomTests.swift Added release() test method to verify functionality of release() in DefaultRoom.
Tests/AblyChatTests/DefaultRoomsTests.swift Updated tests to utilize MockRoomFactory for creating mock rooms. Added new release test method.
Tests/AblyChatTests/IntegrationTests.swift Enhanced basicIntegrationTest to include room release and status verification.
Tests/AblyChatTests/Mocks/MockChannels.swift Improved thread safety and functionality of MockChannels.
Tests/AblyChatTests/Mocks/MockRoom.swift Introduced MockRoom class to mock InternalRoom for testing.
Tests/AblyChatTests/Mocks/MockRoomFactory.swift Added MockRoomFactory for creating mock rooms in tests.
Tests/AblyChatTests/Mocks/MockRoomLifecycleManager.swift Added performReleaseOperation() method to MockRoomLifecycleManager.

Assessment against linked issues

Objective Addressed Explanation
Integrate room lifecycle manager with the rest of the SDK (ECO-4982)

Possibly related issues

Possibly related PRs

Suggested reviewers

  • umair-ably
  • maratal

Poem

🐰 In the chatroom where rabbits play,
New factories lead the way.
Rooms now release with a hop and a cheer,
Lifecycle magic, oh so near!
With tests in place, we’ll never stray,
Hopping forward, come what may! 🌟


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Actionable comments posted: 5

🧹 Outside diff range and nitpick comments (16)
Tests/AblyChatTests/Mocks/MockRoomFactory.swift (2)

1-5: LGTM! Consider adding a type alias for arguments tuple.

The actor declaration and properties are well-structured. The use of an actor ensures thread-safe access to the mock's state, which is essential for testing concurrent code.

Consider adding a type alias to improve readability:

+typealias RoomArguments = (realtime: RealtimeClient, chatAPI: ChatAPI, roomID: String, options: RoomOptions, logger: any InternalLogger)

 actor MockRoomFactory: RoomFactory {
     private var room: MockRoom?
-    private(set) var createRoomArguments: (realtime: RealtimeClient, chatAPI: ChatAPI, roomID: String, options: RoomOptions, logger: any InternalLogger)?
+    private(set) var createRoomArguments: RoomArguments?

15-23: Enhance the fatal error message with more context.

The implementation correctly captures arguments and handles the room creation flow. However, the error message could be more specific to help with debugging test failures.

Consider enhancing the error message:

-            fatalError("MockRoomFactory.createRoom called, but the mock factory has not been set up with a room to return")
+            fatalError("MockRoomFactory.createRoom called for roomID: \(roomID), but the mock factory has not been set up with a room to return. Ensure setRoom() is called before createRoom().")
Tests/AblyChatTests/DefaultChatClientTests.swift (1)

26-27: Consider strengthening the equality assertions

The current assertions verify object identity for realtime (===) and value equality for options. This looks good, but consider adding assertions to verify that the factory is properly configured.

Add a test helper to verify factory configuration:

extension DefaultRooms {
    var testsOnly_factory: Factory { factory }
}

Then enhance the test:

 #expect(defaultRooms.testsOnly_realtime === realtime)
 #expect(defaultRooms.clientOptions.isEqualForTestPurposes(options))
+#expect(defaultRooms.testsOnly_factory is DefaultRoomFactory)
Tests/AblyChatTests/Mocks/MockChannels.swift (1)

36-41: Consider defer and evaluate array copying necessity

Two suggestions for improvement:

  1. Use defer for safer mutex handling
  2. Consider if array copying is necessary for this test mock
 var releaseArguments: [String] {
-    let result: [String]
     mutex.lock()
-    result = _releaseArguments
-    mutex.unlock()
-    return result
+    defer { mutex.unlock() }
+    return _releaseArguments
 }
Tests/AblyChatTests/Mocks/MockRoom.swift (3)

3-11: Add documentation to explain mock usage and configuration

The mock implementation is well-structured, but would benefit from documentation explaining:

  • Purpose of the mock
  • How to configure the releaseImplementation
  • Example usage in tests

Add documentation like this:

+/// A mock implementation of `InternalRoom` that tracks release calls and allows custom release behavior.
+///
+/// Example usage:
+/// ```swift
+/// let mockRoom = MockRoom(options: options) {
+///     // Custom release implementation
+/// }
+/// await mockRoom.release()
+/// XCTAssertEqual(await mockRoom.releaseCallCount, 1)
+/// ```
 actor MockRoom: InternalRoom {

13-35: Improve error messages and consider future test requirements

The error messages could be more descriptive to help debugging test failures. Also, consider implementing getters that might be needed for future tests instead of using fatalError.

Example improvement:

     nonisolated var roomID: String {
-        fatalError("Not implemented")
+        fatalError("MockRoom.roomID getter not implemented. Configure this property if needed for your test.")
     }

41-59: Consider tracking attach/detach calls for comprehensive testing

While release() is well implemented with call tracking, consider adding similar tracking for attach() and detach() methods as they might be needed for testing the complete room lifecycle.

Example implementation:

+    private(set) var attachCallCount = 0
+    private(set) var detachCallCount = 0
+    let attachImplementation: (@Sendable () async throws -> Void)?
+    let detachImplementation: (@Sendable () async throws -> Void)?
+
     func attach() async throws {
-        fatalError("Not implemented")
+        attachCallCount += 1
+        try await attachImplementation?()
     }

     func detach() async throws {
-        fatalError("Not implemented")
+        detachCallCount += 1
+        try await detachImplementation?()
     }
Sources/AblyChat/ChatClient.swift (1)

23-24: Consider injecting the room factory as a dependency

The current implementation creates a hardcoded instance of DefaultRoomFactory. Consider injecting the factory through the initializer to improve testability and flexibility.

Here's a suggested implementation:

- public init(realtime: RealtimeClient, clientOptions: ClientOptions?) {
+ public init(
+     realtime: RealtimeClient,
+     clientOptions: ClientOptions?,
+     roomFactory: RoomFactory = DefaultRoomFactory()
+ ) {
    self.realtime = realtime
    self.clientOptions = clientOptions ?? .init()
    logger = DefaultInternalLogger(logHandler: self.clientOptions.logHandler, logLevel: self.clientOptions.logLevel)
-   let roomFactory = DefaultRoomFactory()
    rooms = DefaultRooms(realtime: realtime, clientOptions: self.clientOptions, logger: logger, roomFactory: roomFactory)
}
Tests/AblyChatTests/Mocks/MockRoomLifecycleManager.swift (1)

36-38: Consider aligning release operation with existing patterns.

While the implementation is functional, it deviates from the established patterns used in performAttachOperation and performDetachOperation. Consider these improvements:

  1. Add a releaseResult parameter for consistency with other operations
  2. Add documentation explaining the method's purpose
  3. Add guard/fatal error check like other operations

Here's a suggested implementation:

-    private(set) var releaseCallCount = 0
+    private let releaseResult: Result<Void, ARTErrorInfo>?
+    private(set) var releaseCallCount = 0

     init(attachResult: Result<Void, ARTErrorInfo>? = nil,
          detachResult: Result<Void, ARTErrorInfo>? = nil,
+         releaseResult: Result<Void, ARTErrorInfo>? = nil,
          roomStatus: RoomStatus? = nil) {
         self.attachResult = attachResult
         self.detachResult = detachResult
+        self.releaseResult = releaseResult
         _roomStatus = roomStatus
     }

-    func performReleaseOperation() async {
-        releaseCallCount += 1
-    }
+    /// Performs the release operation and throws if the configured result is a failure
+    func performReleaseOperation() async throws {
+        releaseCallCount += 1
+        guard let releaseResult else {
+            fatalError("In order to call performReleaseOperation, releaseResult must be passed to the initializer")
+        }
+        try releaseResult.get()
+    }
Tests/AblyChatTests/IntegrationTests.swift (3)

81-83: Consider enhancing status verification robustness.

The status verification is good but could be more comprehensive.

Consider these enhancements:

  1. Add timeout to prevent test hanging if status never changes
  2. Verify no unexpected intermediate states occur between DETACHED and RELEASED
 // (13) Check that we received a RELEASED status change as a result of releasing the room
-_ = try #require(await rxRoomStatusSubscription.first { $0.current == .released })
+let statusChanges = try await rxRoomStatusSubscription.prefix { $0.current != .released }.reduce(into: [RoomStatus]()) { $0.append($1.current) }
+#expect(statusChanges.isEmpty, "Unexpected intermediate states: \(statusChanges)")
+
+// Verify final status
 #expect(await rxRoom.status == .released)

85-87: Consider verifying initial state of new room instance.

While checking for a new instance is good, consider verifying the new room's initial state.

Add verification of the new room's state:

 let postReleaseRxRoom = try await rxClient.rooms.get(roomID: roomID, options: .init())
 #expect(postReleaseRxRoom !== rxRoom)
+#expect(await postReleaseRxRoom.status == .initialized)

Line range hint 6-8: Address the TODO comment about implementing test timeouts.

The comment indicates a need for timeout functionality to prevent tests from hanging indefinitely. This is particularly important for integration tests that interact with external services.

Would you like me to help implement a timeout wrapper function that works across all supported iOS versions? This would help prevent test hangs and provide better error messages when operations take too long.

Tests/AblyChatTests/DefaultRoomsTests.swift (1)

91-105: Consider extracting test setup helpers

The test setup is quite complex with multiple components. Consider extracting helper methods to improve readability and reusability:

  • Stream setup
  • Room creation with state capture

Example helper method:

private func createRoomWithStateCapture(
    options: RoomOptions = .init(),
    stateCapture: @escaping () async -> Void
) -> (room: MockRoom, factory: MockRoomFactory) {
    let room = MockRoom(options: options, onRelease: stateCapture)
    let factory = MockRoomFactory()
    return (room, factory)
}
Tests/AblyChatTests/DefaultRoomTests.swift (1)

99-120: Consider strengthening test assertions.

The test effectively verifies the basic release functionality. Consider adding these additional assertions to make the test more robust:

 // Then: It:
 // 1. calls `performReleaseOperation()` on the room lifecycle manager
 // 2. calls `channels.release()` with the name of each of the features' channels
 #expect(await lifecycleManager.releaseCallCount == 1)
 #expect(Set(channels.releaseArguments) == Set(channelsList.map(\.name)))
+// Verify no other lifecycle manager methods were called
+#expect(await lifecycleManager.attachCallCount == 0)
+#expect(await lifecycleManager.detachCallCount == 0)
+// Verify channels were released exactly once
+#expect(channels.releaseCallCount == channelsList.count)
Sources/AblyChat/Room.swift (2)

37-41: Simplify the associated type constraint in RoomFactory

In the RoomFactory protocol, the associated type Room is constrained with a module prefix. Since InternalRoom is defined within the same module, the module qualification may be unnecessary.

Consider updating the associated type constraint to:

associatedtype Room: InternalRoom

This simplifies the code and improves readability unless there's a specific need for the module prefix.


139-146: Confirm error handling when releasing channels

In the release() method, the realtime.channels.release(channel.name) call may benefit from error handling if it can fail or throw exceptions.

Consider checking if release can throw errors:

  • If it can throw, add a try statement and handle potential errors.
  • If it is asynchronous, use await.

For example:

for channel in channels.values {
    try realtime.channels.release(channel.name)
}

Ensure that all resources are properly released and any exceptions are managed to prevent resource leaks.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between ac92127 and fb0f60c.

📒 Files selected for processing (12)
  • Sources/AblyChat/ChatClient.swift (1 hunks)
  • Sources/AblyChat/Room.swift (5 hunks)
  • Sources/AblyChat/RoomLifecycleManager.swift (2 hunks)
  • Sources/AblyChat/Rooms.swift (3 hunks)
  • Tests/AblyChatTests/DefaultChatClientTests.swift (1 hunks)
  • Tests/AblyChatTests/DefaultRoomTests.swift (1 hunks)
  • Tests/AblyChatTests/DefaultRoomsTests.swift (4 hunks)
  • Tests/AblyChatTests/IntegrationTests.swift (1 hunks)
  • Tests/AblyChatTests/Mocks/MockChannels.swift (2 hunks)
  • Tests/AblyChatTests/Mocks/MockRoom.swift (1 hunks)
  • Tests/AblyChatTests/Mocks/MockRoomFactory.swift (1 hunks)
  • Tests/AblyChatTests/Mocks/MockRoomLifecycleManager.swift (2 hunks)
🧰 Additional context used
📓 Learnings (3)
Sources/AblyChat/RoomLifecycleManager.swift (1)
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#85
File: Sources/AblyChat/RoomLifecycleManager.swift:713-713
Timestamp: 2024-11-10T17:12:32.395Z
Learning: In `RoomLifecycleManager.performReleaseOperation` in `Sources/AblyChat/RoomLifecycleManager.swift`, the use of `try!` with `waitForCompletionOfOperationWithID` is intentional due to the reasons explained in the preceding comment.
Tests/AblyChatTests/DefaultChatClientTests.swift (2)
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#61
File: Tests/AblyChatTests/DefaultRoomTests.swift:33-34
Timestamp: 2024-11-10T17:12:32.395Z
Learning: In Swift Testing, using `#expect` with `await` may result in less informative failure messages when debugging asynchronous tests.
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#61
File: Tests/AblyChatTests/DefaultRoomTests.swift:33-34
Timestamp: 2024-11-10T17:12:36.565Z
Learning: In Swift Testing, using `#expect` with `await` may result in less informative failure messages when debugging asynchronous tests.
Tests/AblyChatTests/Mocks/MockRoomLifecycleManager.swift (4)
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#54
File: Tests/AblyChatTests/RoomLifecycleManagerTests.swift:499-504
Timestamp: 2024-11-10T17:12:32.395Z
Learning: In test closures, parameters like `callCount` may be used to track invocation counts correctly across invocations.
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#54
File: Tests/AblyChatTests/RoomLifecycleManagerTests.swift:499-504
Timestamp: 2024-11-10T17:12:32.395Z
Learning: In test closures, parameters like `callCount` may be used to track invocation counts correctly across invocations.
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#54
File: Tests/AblyChatTests/RoomLifecycleManagerTests.swift:627-631
Timestamp: 2024-11-10T17:12:32.395Z
Learning: The closure `detachImpl` in `RoomLifecycleManagerTests.swift` functions as intended without external state variables to track invocation count.
Learnt from: lawrence-forooghian
PR: ably-labs/ably-chat-swift#54
File: Tests/AblyChatTests/RoomLifecycleManagerTests.swift:627-631
Timestamp: 2024-11-10T17:12:36.565Z
Learning: The closure `detachImpl` in `RoomLifecycleManagerTests.swift` functions as intended without external state variables to track invocation count.
🔇 Additional comments (17)
Tests/AblyChatTests/Mocks/MockRoomFactory.swift (2)

7-9: LGTM! Clean and flexible initializer.

The initializer is well-designed with an optional parameter, providing flexibility in test setup.


11-13: LGTM! Clear and purposeful setter.

The setter provides a clean way to configure the mock during test setup.

Tests/AblyChatTests/DefaultChatClientTests.swift (1)

25-27: Verify test coverage for the new room factory pattern

While the type assertion correctly validates the new DefaultRoomFactory implementation, consider adding test cases to verify the room release functionality mentioned in PR objectives (ECO-4982).

Let's check if there are dedicated tests for the release functionality:

Consider structuring the tests to cover:

  1. Successful room release
  2. Release of non-existent rooms
  3. Multiple releases of the same room
  4. Concurrent release operations
Tests/AblyChatTests/Mocks/MockChannels.swift (2)

6-8: LGTM! Thread safety implementation is solid.

Good use of NSLock and documentation. The private(set) modifier ensures thread-safe access control.


4-4: Verify thread safety of channels property

The class is marked as @unchecked Sendable, but the channels array is not protected by the mutex. If the array is immutable after initialization, this is fine. Otherwise, consider protecting it with the mutex as well.

✅ Verification successful

Thread safety of channels property is properly implemented

Looking at the implementation, the channels property is:

  • Declared as private and immutable (let)
  • Only set once during initialization
  • Only used for read-only operations (first)

The @unchecked Sendable marking is appropriate as the class properly handles thread safety:

  • Immutable channels array ensures thread-safe read access
  • Mutable state (_releaseArguments) is protected by the mutex
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check if channels array is modified anywhere in the codebase
# Look for any assignments to channels property or array mutations
ast-grep --pattern 'class MockChannels {
  $$$
  channels = $_
  $$$
}'

ast-grep --pattern 'class MockChannels {
  $$$
  channels.$_($_)
  $$$
}'

Length of output: 149


Script:

#!/bin/bash
# Let's try a different approach to find the channels property and its usage
# First, let's see the content of the MockChannels file
cat Tests/AblyChatTests/Mocks/MockChannels.swift

# Also search for any modifications to channels using ripgrep
rg "channels\." Tests/AblyChatTests/Mocks/MockChannels.swift -A 2

Length of output: 1406

Sources/AblyChat/ChatClient.swift (1)

23-24: Verify memory management with room releases

Since this change is part of implementing room release functionality, we should verify that the new factory properly handles memory management during room creation and release cycles.

✅ Verification successful

Based on the shell script results, I can now generate the final response:

Memory management implementation verified for room releases

The codebase shows proper memory management implementation for room releases:

  • Appropriate deinit handling in RoomLifecycleManager that cancels ongoing tasks
  • Proper weak self usage in closures to avoid retain cycles
  • Clear state transitions through .releasing to .released states
  • Proper cleanup of channels and resources during release
  • Test coverage verifying memory management scenarios including:
    • Release state transitions
    • Channel cleanup
    • Resource deallocation
    • Edge cases like multiple releases
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for memory management related code in room implementations
echo "Searching for room release and deinit implementations..."
rg -A 5 "deinit|release" --type swift

# Look for potential retain cycles
echo "Checking for potential retain cycles in closures..."
ast-grep --pattern 'weak\s+self'
ast-grep --pattern '[^weak]\s+self'

Length of output: 34633

Tests/AblyChatTests/Mocks/MockRoomLifecycleManager.swift (1)

9-9: LGTM! Property follows established patterns.

The releaseCallCount property maintains consistency with existing count tracking properties and has appropriate access control.

Tests/AblyChatTests/IntegrationTests.swift (1)

78-79: LGTM! Room release operation is well-placed.

The release operation correctly follows the room detachment, maintaining proper lifecycle order.

Tests/AblyChatTests/DefaultRoomsTests.swift (1)

Line range hint 6-82: Well-structured test refactoring using mocks!

The modifications to the room retrieval tests demonstrate good testing practices:

  • Clear separation of concerns using mock objects
  • Comprehensive test coverage for success and error scenarios
  • Strong assertions verifying both object identity and property values
Tests/AblyChatTests/DefaultRoomTests.swift (1)

97-97: Consider adding order verification test.

While the current approach is pragmatic given time constraints, the order of operations could be critical for correctness. The spec point CHA-RL3h seems to indicate that performReleaseOperation() must complete before channel release.

Consider adding a follow-up test using async/await mechanisms to verify the operation order. I can help implement this if needed.

Sources/AblyChat/RoomLifecycleManager.swift (3)

868-870: LGTM! Public method follows established patterns.

The implementation of performReleaseOperation() aligns with other lifecycle operations and correctly delegates to the internal implementation.


872-874: LGTM! Test support maintains consistency.

The test-only variant with operation ID forcing maintains consistency with other lifecycle operations and supports proper testing of operation sequencing.


Line range hint 880-884: Verify non-throwing implementation approach.

The release operation is implemented as non-throwing, unlike ATTACH and DETACH operations. This appears intentional as the operation handles all error cases internally through state transitions.

Let's verify this design choice by checking other release-related implementations:

✅ Verification successful

Based on the comprehensive code analysis, I can now provide a definitive response about the non-throwing implementation of the release operation.

The non-throwing implementation is verified as intentional and consistent with the codebase design.

The evidence shows that:

  1. The release operation is consistently implemented as non-throwing across all layers:
    • RoomLifecycleManager protocol defines performReleaseOperation() as non-throwing
    • DefaultRoomLifecycleManager implements release operations without throws
    • The implementation handles all error cases internally through state transitions
  2. The design is deliberate as shown by:
    • Release operation retries detach operations until success (CHA-RL3f)
    • Failed contributors are skipped rather than causing errors (CHA-RL3e)
    • State transitions handle all error cases internally
  3. This contrasts with attach/detach operations which are explicitly throwing to propagate errors to callers
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the non-throwing pattern is consistent across release implementations

# Check for any release method implementations
ast-grep --pattern 'func $$$release$$$'

# Check for release error handling patterns
rg -A 5 'throw.*release'

Length of output: 68


Script:

#!/bin/bash
# Let's try a more comprehensive search for release-related implementations and error handling

# Search for release-related method implementations with context
rg -U -A 10 -B 5 'func.*[Rr]elease' --type swift

# Search for any throw statements in files containing 'release'
rg -l 'release' --type swift | xargs rg -A 5 'throw'

# Search specifically for the RoomLifecycleManager class implementation
fd RoomLifecycleManager.swift --exec cat {}

Length of output: 165798

Sources/AblyChat/Rooms.swift (2)

52-56: Approved: Addition of testsOnly_hasExistingRoomWithID(_:) method

The testsOnly_hasExistingRoomWithID(_:) method is a valuable addition for testing purposes. It is appropriately enclosed within #if DEBUG directives, ensuring it does not affect the production code.


65-68: Verify proper cleanup in room.release()

After removing the room from the rooms dictionary, await room.release() is called. Please ensure that the release() method within the room correctly handles all necessary cleanup operations, such as unsubscribing from channels and releasing resources, to prevent memory leaks or unintended behavior.

If you'd like, we can review the room.release() implementation to confirm it handles all required cleanup tasks.

Sources/AblyChat/Room.swift (2)

22-25: Introduction of InternalRoom protocol is appropriate

The creation of the InternalRoom protocol extending Room with an asynchronous release() method enhances internal room management within the SDK.


69-69: Verify the use of existential types with the any keyword

The declaration of channels uses the any keyword with a protocol type:

private let channels: [RoomFeature: any RealtimeChannelProtocol]

Ensure that the use of any is necessary and compatible with your project's Swift version and coding standards. If the RealtimeChannelProtocol does not contain Self or associated type requirements, you might omit any.

Run the following script to check for any usage across the codebase:

This will help verify consistent usage of existential types.

✅ Verification successful

Let me gather more information about the RealtimeChannelProtocol to determine if it has any Self or associated type requirements.


Let me check the base protocol ARTRealtimeChannelProtocol to ensure we have a complete understanding of the protocol hierarchy.


Let me check for imports to understand where ARTRealtimeChannelProtocol comes from.


Based on the evidence gathered, I can now provide the final response:

The use of any keyword is necessary and correct

The RealtimeChannelProtocol inherits from ARTRealtimeChannelProtocol which is from the Ably SDK. The use of any is consistent across the codebase as shown by multiple similar declarations:

  • public typealias RealtimeClient = any RealtimeClientProtocol
  • private let underlyingChannel: any RealtimeChannelProtocol
  • func getChannel(_ name: String, opts: ARTRealtimeChannelOptions? = nil) -> any RealtimeChannelProtocol

This consistent usage pattern and the fact that it's working with an external SDK protocol suggests the any keyword is required here for proper type erasure.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Find all occurrences of 'any' keyword usage with protocols.

# Search for 'any' keyword usage with protocols.
rg '\bany\s+[A-Z][A-Za-z0-9]+Protocol\b'

Length of output: 620


Script:

#!/bin/bash
# Search for the definition of RealtimeChannelProtocol
rg "protocol\s+RealtimeChannelProtocol" -A 10

Length of output: 1030


Script:

#!/bin/bash
# Search for ARTRealtimeChannelProtocol definition
rg "protocol\s+ARTRealtimeChannelProtocol" -A 10

# Also check if this is imported from a framework
rg "import.*ARTRealtimeChannelProtocol"

Length of output: 92


Script:

#!/bin/bash
# Search for imports in the relevant files
rg "^import" Sources/AblyChat/Dependencies.swift Sources/AblyChat/Room.swift

# Also check if there's any Ably related imports
rg "import.*Ably" 

Length of output: 4835

Tests/AblyChatTests/Mocks/MockChannels.swift Outdated Show resolved Hide resolved
Tests/AblyChatTests/Mocks/MockRoom.swift Show resolved Hide resolved
Tests/AblyChatTests/DefaultRoomsTests.swift Outdated Show resolved Hide resolved
Sources/AblyChat/Rooms.swift Show resolved Hide resolved
Sources/AblyChat/Room.swift Show resolved Hide resolved
We use the implementation of the RELEASE operation provided by the room
lifecycle manager, and implement the spec points relating to room map
bookkeeping and releasing the underlying realtime channels.

Based on [1] at 6f0740a.

I have not implemented the spec points that relate to making sure that a
room fetch waits for any previous room with the same ID to finish
releasing; this is a part of the spec which is in flux (currently
implemented via the INITIALIZING status, which was added to the spec
after we started implementing the room lifecycle manager and hasn’t been
implemented in this SDK yet, and soon to be further changed in the spec
by making room-getting async). We can look at the current state of
things when we come to do #66.

Part of #47.

[1] ably/specification#200
Base automatically changed from 47-integrate-manager-into-existing-operations to main November 12, 2024 13:47
@lawrence-forooghian lawrence-forooghian merged commit fd10691 into main Nov 12, 2024
12 checks passed
@lawrence-forooghian lawrence-forooghian deleted the 47-implement-release branch November 12, 2024 13:49
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3 participants