Course Parser and REST API

Description

First part of this task:

Implement loading of course archive from http://api.bestchange.ru/info.zip and take data from file bm_rates.dat
A file consists of a set of lines, like: 117;89;454;66.82258603;1;123638.43;0.2506;1, where first - ID of sent currency, second - received currency, fourth - sending rate&& fifth - receiving rate
Find the most favorable rate for each currency pair that is the exchange rate of the exchanger that comes first in every currency pair in BestChange
Accordingly, write all the favorable courses to the database

Second part:

Write a REST API for getting all the profitable courses, so that realize two methods:
-GET/courses- getting all the courses with filtering: sent currency and received currency.
-GET/course/getPair/send_currency/recive_currency- obviously

For convenience, a minimum UI with forms are provided.

Installation

• git clone https://github.com/romanV7/Course_Parser.git
• cd Course_Parser && npm i
• npm run start

Notice:

• Wait until the loading finishes, unless you won't be able to work with API! (This process takes approximately 4 minutes).
• I used module cluster in order to divide the whole task between subprocesses to process faster.
• When loading finishes, you can use API to get data.
• Make sure that you have mongodb connected
• Open browser and press Ctrl + O and choose file index.html for convenience (minimum UI forms) or create new tab and enter url provided below

API routes

/courses/getAllCourses

Route for getting all the courses with filtering: sent currency and received currency.

Parameters:

• no parameters here

Response:

• status: HTTP status code.
• error:
  • is not null if status: 404 is { message: "Pair not found try another one" }
  • is null if status: 200, is { message: "Error message" } otherwise;
• data: array of objects containing the following response fields with filters:
  • possible filters:
    • receivedId,
    • gottonId
• Output after filtering:
  • id: course unique id,
  • receivedId: course unique receivedId,
  • gottenId: course unique gottonId,

/courses/getPair/send_currency/recive_currency

Route to get, according to received params, the most favorable rate for each currency pair

Parameters:

• sent currency
• received currency

Response:

• status HTTP status code.
• error: is null if status: 200, is { message: "Error message" } otherwise;
• data: object containing the following response fields (each object has next unique values):
  • _id: course id,
  • receivedId: course unique receivedId,
  • gottenId: course unique gottenId,
  • companyId: vendor id,
  • currIn: input currency,
  • currOut: output currency,
  • stuff: receivedId/gottonId,
  • key: metadata,
  • key_: metadata