jfoot/technicaltest

Input/Output

• The program requires two arguments to be passed when executed: the start date and the full file path of a JSON file containing customer data.

An example customer.json file can be found in "input.json"

• The output will be printed to the console, and a file named "output.json" will be created in the directory where the program is running.

Code Overview

• Program.fs - Contains the main logic for the program. Given the input, it determines the 90-day range and decides which customers should receive a message when.
• Types.fs - Defines the data types used in the program, including the Customer type and Marketing Preference discriminated union. It also includes logic for parsing JSON data.
• InputParser.fs - Implements the logic for reading user input (start date and file path).
• Tests.fs - Includes simple XUnit tests to ensure the main functions are functioning correctly.
• input.json - An example customer data file.

Assumptions made

• Customer names are assumed to be unique. If a JSON file contains multiple occurrences of a customer name, only the first occurrence will be included in the processing. This ensures that a customer cannot have conflicting marketing preferences (e.g., "Every Day" and "Never").
• Customers with invalid day of the week or date of the month values will be ignored during processing.