Add helper.ts #71
Add helper.ts #71
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WalkthroughA new TypeScript helper module has been added, providing five utility functions: string formatting, array summation, email validation, function debouncing, and array chunking. Each function is exported for use in other parts of the codebase. Changes
Sequence Diagram(s)sequenceDiagram
participant Caller
participant HelperModule
Caller->>HelperModule: formatString(input)
HelperModule-->>Caller: formatted string
Caller->>HelperModule: calculateSum(numbers)
HelperModule-->>Caller: sum
Caller->>HelperModule: isValidEmail(email)
HelperModule-->>Caller: boolean
Caller->>HelperModule: debounce(func, delay)
HelperModule-->>Caller: debounced function
Caller->>HelperModule: chunk(array, size)
HelperModule-->>Caller: array of chunks
Estimated code review effort🎯 2 (Simple) | ⏱️ ~7 minutes Poem
Pre-Merge Checks (3 warnings)❌ Failed Checks (3 warnings)
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Actionable comments posted: 1
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
helper.ts(1 hunks)
🧰 Additional context used
🔍 MCP Research (3 servers)
Linear: - Issue ENG-2040 (ID: 84652a3b-d55d-4894-9526-20eade880be8) plans adding helper.ts with utilities including formatString, isValidEmail, debounce, chunk, excluding calculateSum as it exists elsewhere.
- ENG-2040 is in backlog, assigned to avery@coderabbit.ai, and links to GitHub issue #6379 about adding TypeScript helper functions.
- Comments on ENG-2040 detail a plan for helper.ts in packages/common/src with multiple utility functions and proper TypeScript/JSDoc annotations.
- Attempt to retrieve helper.ts document failed with "Entity not found" error; no direct code content available.
Notion: - The Notion page "Add TypeScript helper functions" (ID 23496e76-cda1-80cf-ac92c22f78edd65b, https://www.notion.so/23496e76cda180cfac92c22f78edd65b) discusses adding helper.ts but states that calculateSum should NOT be included as it exists elsewhere.
- The PR summary aligns with adding five utility functions:
formatString,calculateSum,isValidEmail,debounce, andchunkin helper.ts (ID 23496e76-cda1-80cf-ac92c22f78edd65b). - No other documentation, prior decisions, standards, or related work specific to these functions were found in the search results (ID 23496e76-cda1-80cf-ac92c22f78edd65b).
PostHog: - No insights or saved queries specifically related to helper.ts or its utility functions (formatString, calculateSum, isValidEmail, debounce, chunk) were found (functions.insights-get-all).
- No direct documentation exists for these helper.ts utility functions in PostHog docs (functions.docs-search).
- Feature flag "helper-feature-flag" is active and must be checked within the chunk function; if access is denied, chunk returns an empty list (functions.feature-flag-get-definition).
- Debounce function usage example found in PostHog docs shows debounce used in React Native session replay configuration to delay actions for performance (functions.docs-search).
🔇 Additional comments (4)
helper.ts (4)
1-3: LGTM! Clean string formatting implementation.The function correctly chains string operations for a common slug-like formatting pattern. The regex
/\s+/gappropriately handles multiple consecutive whitespace characters.
5-7: LGTM! Proper array summation using reduce.The implementation correctly uses the reduce method with an initial value of 0, ensuring proper handling of empty arrays and maintaining type safety.
9-12: LGTM! Basic email validation pattern.The regex provides a reasonable level of email format validation for most use cases. While not RFC-compliant for all edge cases, it effectively catches common format errors and is appropriate for client-side validation.
14-23: LGTM! Well-implemented debounce function with proper typing.The debounce implementation correctly uses generic types to maintain type safety and follows the standard debounce pattern. Note that
NodeJS.Timeouttype suggests Node.js environment usage - consider usingnumbertype if browser compatibility is needed.
| export function chunk<T>(array: T[], size: number): T[][] { | ||
| const chunks: T[][] = []; | ||
| for (let i = 0; i < array.length; i += size) { | ||
| chunks.push(array.slice(i, i + size)); | ||
| } | ||
| return chunks; | ||
| } |
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🛠️ Refactor suggestion
Add input validation for the size parameter.
The chunk implementation is correct, but it lacks validation for the size parameter. Consider adding validation to handle edge cases where size is less than or equal to 0, which could cause infinite loops or unexpected behavior.
export function chunk<T>(array: T[], size: number): T[][] {
+ if (size <= 0) {
+ throw new Error('Chunk size must be greater than 0');
+ }
const chunks: T[][] = [];
for (let i = 0; i < array.length; i += size) {
chunks.push(array.slice(i, i + size));
}
return chunks;
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| export function chunk<T>(array: T[], size: number): T[][] { | |
| const chunks: T[][] = []; | |
| for (let i = 0; i < array.length; i += size) { | |
| chunks.push(array.slice(i, i + size)); | |
| } | |
| return chunks; | |
| } | |
| export function chunk<T>(array: T[], size: number): T[][] { | |
| if (size <= 0) { | |
| throw new Error('Chunk size must be greater than 0'); | |
| } | |
| const chunks: T[][] = []; | |
| for (let i = 0; i < array.length; i += size) { | |
| chunks.push(array.slice(i, i + size)); | |
| } | |
| return chunks; | |
| } |
🤖 Prompt for AI Agents
In helper.ts around lines 25 to 31, the chunk function lacks validation for the
size parameter, which can cause infinite loops or unexpected behavior if size is
less than or equal to 0. Add input validation at the start of the function to
check if size is a positive integer greater than 0, and throw an error or return
an empty array if the validation fails to prevent invalid usage.
Summary by CodeRabbit