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REQUIREMENTS.md

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Requirements

Goal

Implement an app showing currency rates.

Technology stack

  • PHP
  • Laravel
  • Vue
  • MySQL

Usage of vanilla framework functionalities is preferred. Amount of 3rd-party packages should be minimized.

1. Console commands

a. Importing currency rates

Implement necessary command(s) to import data from http://www.cbr.ru/scripts/XML_daily.asp.

2. API

Implement REST API providing various endpoints. You have to define API structure yourself based on high-level requirements.

API must be secured with token-based authentication. Authentication endpoints have to be provided.

Following endpoints returning currency data are required.

a. Currencies with their currency rates.

Input parameters (all are optional):

  • page: Page to return.
  • page_size: Number of currencies per page.
  • date: Date to return currency rates for.
  • base_currency_id: ID of the currency to return rates for (extra calculations required).

Response:

  • An array of currencies with:
  • ID, symbol.
  • Rate converted to selected base currency with nominal applied.
  • Rate nominal. Some currency rates are large numbers. They have to be divided by the nominal so that final rate doesn't exceed 1000. Nominal is a value of 10^(x*3) where "x" is an integer greater or equal to zero, i.e. 1, 1000, etc.
  • Maximum, minimum and average rate of the currency.

b. History of the specific currency

Input parameters (all except id are optional):

  • id: ID of the currency to return
  • page: Page to return.
  • page_size: Number of days per page.
  • date_from/date_to: Date region to return history for.
  • base_currency_id: ID of the currency to return rates for (extra calculations required).

Response:

  • An array of daily historical data. One record per day with:
  • Rate converted to selected base currency.

3. Frontend

Implement SPA based on Vue. The following views are required.

a. List of currencies.

Elements:

  • Table with currencies and their data.
  • Base currency dropdown.
  • Page size dropdown.
  • Page selection.

b. History of the currency

Elements:

  • Table with daily currency rate.
  • Base currency dropdown.
  • Page size dropdown.
  • Page selection.
  • Date from/to.
  • Line chart with the daily rate.

4. Unit tests

Cover the most important parts with unit tests.