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@adolfo-pd adolfo-pd commented Nov 22, 2024

WHY

Summary by CodeRabbit

  • New Features

    • Enhanced type safety for WebSocket assignments in the server's asynchronous response management.
    • Introduced a new class for managing asynchronous server responses.
  • Bug Fixes

    • Improved handling of global event listener functions to avoid ESLint warnings.

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coderabbitai bot commented Nov 22, 2024

Walkthrough

The changes in this pull request modify the ServerAsyncResponseManager class within the async.ts file. The constructor now ensures type safety by casting WS to adapters.WebSocket. Additionally, two global functions, addEventListener and removeEventListener, are introduced with empty implementations. The getOpts method remains unchanged but continues to validate OAuth token structures and retrieve project IDs, returning relevant WebSocket URL and subscription parameters. Overall, the focus is on enhancing type safety while preserving existing functionality.

Changes

File Path Change Summary
packages/sdk/src/server/async.ts Updated ServerAsyncResponseManager constructor for type safety with adapters.WebSocket. Added empty implementations for addEventListener and removeEventListener. Introduced type ServerAsyncResponseManagerOpts and class ServerAsyncResponseManager.

Possibly related PRs

  • Fix issues with rails/actioncable in the server sdk #14714: The changes in this PR directly modify the ServerAsyncResponseManager class in async.ts, including the addition of global functions and improvements to the getOpts method, which are closely related to the modifications made in the main PR.

Suggested reviewers

  • dylburger

Poem

In the server's heart, a change so bright,
WebSocket's cast, now just feels right.
With listeners added, though silent they stay,
Type safety blooms in a code ballet.
Hops of joy for the code we mend,
In the world of async, our changes blend! 🐇✨


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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (2)
packages/sdk/src/server/async.ts (2)

Line range hint 7-10: Consider a more robust event handling polyfill

The current global declarations for addEventListener and removeEventListener are overly simplified and might cause issues:

  1. The type signatures don't match the full browser API
  2. Empty implementations might break code expecting actual event handling
  3. Global augmentation could conflict with other polyfills

Consider using established polyfills like events module or implementing a proper EventTarget interface:

import { EventEmitter } from 'events';

const eventEmitter = new EventEmitter();
global.addEventListener = (type: string, listener: () => void) => {
  eventEmitter.on(type, listener);
};
global.removeEventListener = (type: string, listener: () => void) => {
  eventEmitter.off(type, listener);
};

Line range hint 32-45: Consider enhancing token validation and URL safety

The implementation is functional but could be improved:

  1. Token validation could be more comprehensive
  2. The OAuth token should be URL-encoded when added to the WebSocket URL

Consider this enhancement:

   protected override async getOpts(): Promise<AsyncResponseManagerOpts> {
     const oauthToken = await this.serverOpts.getOauthToken();
-    if (!oauthToken?.token?.access_token) {
+    if (!oauthToken?.token?.access_token || typeof oauthToken.token.access_token !== 'string') {
       throw new Error("Invalid OAuth token structure");
     }
     const token = oauthToken.token.access_token;
     const projectId = await this.serverOpts.getProjectId();
     return {
-      url: `wss://${this.serverOpts.apiHost}/websocket?oauth_token=${token}`,
+      url: `wss://${this.serverOpts.apiHost}/websocket?oauth_token=${encodeURIComponent(token)}`,
       subscriptionParams: {
         project_id: projectId,
       },
     };
   }
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between d143c2c and 93d6ef7.

📒 Files selected for processing (1)
  • packages/sdk/src/server/async.ts (1 hunks)
🔇 Additional comments (2)
packages/sdk/src/server/async.ts (2)

Line range hint 12-16: LGTM! Well-structured type definition

The type definition is clear, flexible (allowing both Promise and direct values), and properly captures the required configuration.


29-29: Verify WebSocket adapter compatibility at runtime

While the type assertion fixes the TypeScript error, it might mask runtime incompatibilities between ws and the expected adapter interface.

Let's verify the adapter interface compatibility:

✅ Verification successful

Type assertion is safe in this context

The type assertion is actually appropriate here because:

  1. The code is setting up a Node.js environment adapter for ActionCable, where ws package is a standard WebSocket implementation
  2. The adapter is only used internally by ActionCable's consumer for basic WebSocket functionality
  3. The implementation shows proper environment setup with event listeners and connection handling
  4. The type cast is necessary because ActionCable's type system doesn't recognize the Node.js ws implementation, despite it being functionally compatible
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Check ws package interface against adapter requirements
ast-grep --pattern 'interface WebSocket {
  $$$
}' | rg -A 10 'interface WebSocket'

# Check actual usage of WebSocket methods
rg -g '*.ts' -g '*.js' --type-add 'ts:*.{ts,js}' -A 3 'adapters\.WebSocket\.' 

Length of output: 165


Script:

#!/bin/bash
# Let's try a different approach to find WebSocket interface and usage

# Find WebSocket related interfaces/types
ast-grep --pattern 'type WebSocket = {
  $$$
}'

ast-grep --pattern 'export interface $_ {
  $$$
  WebSocket
  $$$
}'

# Find WebSocket adapter usage patterns
rg -g '*.ts' 'WebSocket.*=' -A 2

# Check the ws package type definitions
fd 'ws.d.ts' --exec cat {}

# Look for WebSocket method calls
rg -g '*.ts' '\bWebSocket\.' -A 2

Length of output: 484


Script:

#!/bin/bash
# Let's examine the adapters interface and WebSocket usage more thoroughly

# Find the adapters type definition
ast-grep --pattern 'interface $_ {
  WebSocket: $_
  $$$
}'

# Look for WebSocket-related imports and type definitions
rg -g '*.ts' '^import.*WebSocket'

# Check for any WebSocket event handling or method calls
rg -g '*.ts' 'new WebSocket\(' -A 3
rg -g '*.ts' '\.on\(' -A 2 -B 2

Length of output: 1174


Script:

#!/bin/bash
# Let's check the actual implementation and usage of the WebSocket adapter

# Find the file content where WebSocket is being set
fd 'async.ts' --exec cat {}

# Look for any WebSocket-related tests
fd -e test.ts -e spec.ts --exec rg -l 'WebSocket'

# Check for any WebSocket interface definitions in type files
fd -e d.ts --exec rg -l 'WebSocket'

Length of output: 6016

@adolfo-pd adolfo-pd merged commit 79e41b6 into master Nov 22, 2024
10 checks passed
@adolfo-pd adolfo-pd deleted the adolfo/fix-sdk-ts branch November 22, 2024 19:31
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