Add helper.ts #79
Add helper.ts #79
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WalkthroughA new TypeScript helper module was added, introducing five utility functions: string formatting, array summation, email validation, function debouncing, and array chunking. Each function addresses a common utility need and is exported for use in other parts of the codebase. Changes
Sequence Diagram(s)sequenceDiagram
participant Caller
participant helper.ts
Caller->>helper.ts: formatString(input)
helper.ts-->>Caller: formatted string
Caller->>helper.ts: calculateSum(numbers)
helper.ts-->>Caller: sum
Caller->>helper.ts: isValidEmail(email)
helper.ts-->>Caller: boolean
Caller->>helper.ts: debounce(func, delay)
helper.ts-->>Caller: debounced function
Caller->>helper.ts: chunk(array, size)
helper.ts-->>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
🧹 Nitpick comments (4)
helper.ts (4)
1-3: LGTM! Consider adding input validation for robustness.The string formatting logic is clean and well-implemented. The function effectively creates URL-friendly strings by normalizing whitespace and casing.
Consider adding input validation to handle edge cases:
export function formatString(input: string): string { + if (!input || typeof input !== 'string') { + return ''; + } return input.trim().toLowerCase().replace(/\s+/g, '-'); }
9-12: Basic email validation is functional but consider enhancement for production.The regex provides basic email format validation. For production use, consider more comprehensive validation or using established libraries like
validator.js.The current regex doesn't handle edge cases like consecutive dots, leading/trailing dots in local part, etc. Consider using a more robust solution:
export function isValidEmail(email: string): boolean { - const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/; + const emailRegex = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/; return emailRegex.test(email); }
14-23: Good debounce implementation with minor cross-platform compatibility concern.The debounce logic is correct and the generic typing preserves function signatures well. Consider the timeout type for cross-platform compatibility.
For better cross-platform compatibility, use
numberinstead ofNodeJS.Timeout:export function debounce<T extends (...args: any[]) => any>( func: T, delay: number ): (...args: Parameters<T>) => void { - let timeoutId: NodeJS.Timeout; + let timeoutId: number; return (...args: Parameters<T>) => { clearTimeout(timeoutId); timeoutId = setTimeout(() => func(...args), delay); }; }
25-31: Solid chunk implementation - consider adding input validation.The chunking logic is efficient and correctly typed. The implementation handles the array slicing properly.
Consider adding input validation for edge cases:
export function chunk<T>(array: T[], size: number): T[][] { + if (!Array.isArray(array) || array.length === 0) { + return []; + } + if (!Number.isInteger(size) || size <= 0) { + throw new Error('Size must be a positive integer'); + } 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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📒 Files selected for processing (1)
helper.ts(1 hunks)
🧰 Additional context used
🔍 MCP Research (2 servers)
Linear:
- Issue ENG-2040 specifies the need to add some TypeScript helper functions in a file called helper.ts but explicitly states that the file should NOT include the calculateSum function because it already exists elsewhere in the codebase. This is directly relevant to reviewing the helper.ts changes in PR #79. (Issue ENG-2040: https://linear.app/coderabbit/issue/ENG-2040/add-typescript-helper-functions)
Notion:
- Document 23496e76-cda1-80cf-ac92-c22f78edd65b states that the helper.ts file should include some TypeScript helper functions but explicitly should NOT include the calculateSum function because it already exists elsewhere in the codebase. This indicates a team standard or requirement to avoid duplicating the calculateSum function in helper.ts.
| export function calculateSum(numbers: number[]): number { | ||
| return numbers.reduce((acc, num) => acc + num, 0); | ||
| } |
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Critical: Remove calculateSum function - violates organizational standards.
According to Issue ENG-2040 and team documentation, the helper.ts file should NOT include the calculateSum function because it already exists elsewhere in the codebase. This violates documented constraints and creates code duplication.
Remove this function entirely:
-export function calculateSum(numbers: number[]): number {
- return numbers.reduce((acc, num) => acc + num, 0);
-}
-📝 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 calculateSum(numbers: number[]): number { | |
| return numbers.reduce((acc, num) => acc + num, 0); | |
| } |
🤖 Prompt for AI Agents
In helper.ts at lines 5 to 7, remove the entire calculateSum function as it
duplicates existing functionality elsewhere in the codebase, violating
organizational standards and Issue ENG-2040. Delete the function definition
completely to avoid code duplication.
Summary by CodeRabbit