Implement Aggregate Rating Calculation for Product Reviews

[HermanL0201]

Implement Aggregate Rating Calculation for Product Reviews

Description

Task

Create a method to calculate and return average product rating

Acceptance Criteria

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Summary of Work

This pull request implements a robust method for calculating aggregate product ratings based on user reviews.

Changes Made

• Created calculateAggregateRating function in src/rating-utils.ts
• Implemented comprehensive rating calculation logic
• Added input validation for review ratings
• Ensured edge cases are handled gracefully

Implementation Details

• Function calculates average rating from an array of review objects
• Validates each review rating for type and range (1-5)
• Returns 0 for empty review arrays
• Rounds result to 2 decimal places for precision

Validation Checks

• Handles empty review arrays
• Validates rating type (must be number)
• Validates rating range (1-5)
• Throws errors for invalid inputs
• Prevents potential division by zero

Example Scenarios

// Valid case
calculateAggregateRating([{rating: 4}, {rating: 5}, {rating: 3}]) // Returns 4.00

// Empty array
calculateAggregateRating([]) // Returns 0

// Invalid ratings will throw errors
calculateAggregateRating([{rating: 0}]) // Throws Error
calculateAggregateRating([{rating: 'invalid'}]) // Throws Error

Notes

• Assumes reviews are an array of objects with a rating property
• Provides robust error handling and input validation

Changes Made

• Created calculateAggregateRating function
• Added input validation for ratings
• Implemented rounding to 2 decimal places
• Handled empty review array scenario

Tests

• Verify average rating calculation
• Check handling of empty review array
• Validate rating input type
• Validate rating range
• Test rounding to 2 decimal places

Signatures

Staking Key

DZwmqbbKALnQYMhTLYdYeBBKVNptDMSAKQjaASJ9btgo: FUGpUH7UmF3KWafiHspSHWt5GmD9n3XLLMUNdBWyPkJmhXxzoKnvftx7SuzcHBj5iCo2DKGyFKdn64zT6d7xCyMcLbCHV44TWeVLZvRyqbLxjxPWY6RoHZhMGNMbxss93xkPahvmpKNE3GvvAJ2GKbtn5xhJv41rTVDydgE2vkVmKoJJrnaCmdCZGddP8Tnoc8UC2fSxJUECaqyVei8c76eTmNtKTs5w7toojV459fhgnRgpucBwS7X9fN6aARtbVf4JKi7snr8SK8h1BqiZn7DLkcmePNsx139fxNeRo5xcyDM7ewmetrqXyqPt8pvXPggSWPTNVjSHwukT1wzvjajbMmCTEVRXsJF4xc9PRk3bhXgknzxhw6Gcjcz9cMwd7N7PKu1wCPp5Y17bE6C1nw3Uc4GXuKyceYC

Public Key

4E3nQUGBiknkTFLJE6Htj3KKNnHzpxhNv2Jw5cvW4s7J: 2iyFWe4Y8TfAxEbtUswQTGmnDjbHVGMHPhneZR3QrKmRiU3AAJ9CnbHrKuBqkzngQ1P68hYknvtNVUuCwhxhv4MBtVPzNorhgNDnyCxLLQ8mTRr7ao7eRcmwNFjfZAA6LxSmspo7Tct84mK9PSZ6S7WsG4nqGxWhuybQDFkRSHnFR1BEnjaPNBM9mVx7P7BUY53Jcyjw34v6jiKQRAaEovFV3wzAomEmEumTt1YgF6rjeK1pyfMvxQGqpkEtRXywnAuoxgzPVdPnpSrUSHupn3Bm47C9NtKSUb9U98We4UNPh8cWYF44EoPMmkTf2db14sJ7XBd7RTq7KiQaf4j65tWWRR85YxWCC1oRvWwwkRhuuLazqLXLmQuT7JNw8FDjBLst7Y5dSvLzFAHjruYe79nufzrZNUatjoLQ