Fee Calculation

Requirements

task must be made in JavaScript(ES5, ES6 or ES-next) using node.js. If you're not comfortable with node.js, please use whatever you like;
third party libraries, dependencies, tools, frameworks etc. can be used if seems necessary;
your system must be maintainable:
- clear dependencies between separate parts of your code;
- system must be both testable and tested (unit tests are required);
- code understandable, readable, have a clear flow;
your system must be extensible:
- adding new functionality or changing existing one should not require rewriting the system itself or it's core parts;
code must be Airbnb style guide compatible;
minimal documentation should be provided:
- how system should be ran (what command to run);
- how to initiate system's tests (what command to run);
- short description of functionality in more difficult places could be provided in the code itself;
do not use Paysera name in titles, descriptions or the code itself. This helps others to find the libraries that are really related to our services and/or are developed and maintained by our team.

Task

Situation

Paysera users can go to a branch to cash in and/or cash out from Paysera account. There are also commission fees for both cash in and cash out. Only supported currency is EUR.

Commission Fees

For Cash In

Commission fee - 0.03% from total amount, but no more than 5.00 EUR.

You can get configuration from API

For Cash Out

There are different commission fees for cash out for natural and legal persons.

Natural Persons

Default commission fee - 0.3% from cash out amount.

1000.00 EUR per week (from monday to sunday) is free of charge.

If total cash out amount is exceeded - commission is calculated only from exceeded amount (that is, for 1000.00 EUR there is still no commission fee).

You can get configuration from API

Legal persons

Commission fee - 0.3% from amount, but not less than 0.50 EUR for operation.

You can get configuration from API

Rounding

After calculating commission fee, it's rounded to the smallest currency item (for example, for EUR currency - cents) to upper bound (ceiled). For example, 0.023 EUR should be rounded to 3 Euro cents.

Input data

Input data is given in JSON file. Performed operations are given in that file. In each object following data is provided:

{
    "date": "2016-01-05", // operation date in format `Y-m-d`
    "user_id": 1, // user id, integer
    "user_type": "natural", // user type, one of “natural”(natural person) or “juridical”(legal person)
    "type": "cash_in", // operation type, one of “cash_in” or “cash_out”
    "operation": {
        "amount": 200, // operation amount(for example `2.12` or `3`)
        "currency": "EUR" // operation currency `EUR`
    }
}

All operations are ordered by their date ascendingly.

Expected Result

As a single argument program must accept a path to the input file.

Program must output result to stdout.

Result - calculated commission fees for each operation. In each line only final calculated commission fee must be provided without currency.

Example Data

➜  cat input.json
[
    { "date": "2016-01-05", "user_id": 1, "user_type": "natural", "type": "cash_in", "operation": { "amount": 200.00, "currency": "EUR" } },
    { "date": "2016-01-06", "user_id": 2, "user_type": "juridical", "type": "cash_out", "operation": { "amount": 300.00, "currency": "EUR" } },
    { "date": "2016-01-06", "user_id": 1, "user_type": "natural", "type": "cash_out", "operation": { "amount": 30000, "currency": "EUR" } },
     { "date": "2016-01-07", "user_id": 1, "user_type": "natural", "type": "cash_out", "operation": { "amount": 1000.00, "currency": "EUR" } },
    { "date": "2016-01-07", "user_id": 1, "user_type": "natural", "type": "cash_out", "operation": { "amount": 100.00, "currency": "EUR" } },
    { "date": "2016-01-10", "user_id": 1, "user_type": "natural", "type": "cash_out", "operation": { "amount": 100.00, "currency": "EUR" } },
    { "date": "2016-01-10", "user_id": 2, "user_type": "juridical", "type": "cash_in", "operation": { "amount": 1000000.00, "currency": "EUR" } },
    { "date": "2016-01-10", "user_id": 3, "user_type": "natural", "type": "cash_out", "operation": { "amount": 1000.00, "currency": "EUR" } },
    { "date": "2016-02-15", "user_id": 1, "user_type": "natural", "type": "cash_out", "operation": { "amount": 300.00, "currency": "EUR" } },
]

➜  node app.js input.json
0.06
0.90
87.00
3.00
0.30
0.30
5.00
0.00
0.00

Further information about the task is here: https://gist.github.com/PayseraGithub/ef12dabace4c00a3f450f9a9f259d3cd#requirements

Common setup

Clone the repo and install the dependencies.

git clone https://github.com/elham-sedighi/feecalculation---Nodejs.git
cd feecalculation---Nodejs-master

npm install

Run

npm start

Test

npm test