Brief Summary

This program takes an input text file customers.txt and outputs a list of invitees.

Ouput all customer within 100 km of Intercom's Dublin office in output.txt.

Formula calculate distance- https://en.wikipedia.org/wiki/Great-circle_distance.

Prerequisites

Python 2.7

Flake8 Linting

Pytest for testing

Usage

For running install requirements for unit testing using pytests and linting flake8:

pip install -r requirements.txt

For running main program and give output :

./bin/intercom

or

python src/main.py 

Command

For running tests

make tests

For running linter

make lint

How to run it using docker

I provide Dockerfile for python 2.7. You need to have Docker installed on your local machine

Step:

1. Install Docker
2. ./run.sh
3. docker exec -it {container_id} bin/bash
4. cd opt/intercom/
5.  ./bin/intercom

Design Structure

Models

• Customer
  • Customer has name userid and location (Point)
• Point
  • Point for hold latitude and longitude

Decoder

• CustomerDecoder
  • For decode string json to customer object

Service

• InviteService
  • Calculate distance and get all customer less than 100km sorted by user id

Core

• Parsing
  • Validation parsing for json file
• DistanceStrategy
  • Manager using strategy pattern for selecting which strategy we will use for estimate distance
• GlobalCircleDistance
  • Estimate Distance using Global Circle Distance formula
• FormatterOutput
  • Create file output.txt for list user being invited

Philip Moniaga philip.moniaga@gmail.com