HackPostcodes

HackPostcodes is a library written in Hack that wraps around the https://postcodes.io API.

Motivation

I've been learning the Hack programming language, and the Hip Hop Virtual Machine (HHVM) - so seemed like a good excuse to make something usable.

Dependancies

This was written using HHVM v3.18, it's probably backwards compatible to a degree though
PHPUnit 5.7.* - There isn't compatibility with HHVM above this yet

Installation

You can install this library using composer:

$ composer install mfmbarber/HackPostcodes

Usage

To use the Postcodes library you first need to ensure you instantiate the CurlRequest class, and inject this into Postcodes as a constructor dependancy. This allows you to swap out the CurlRequest class with your own implementation if required. It also allows us to mock our dependancy when testing.

Once you have instantiated the Postcodes class you can then call any of the following methods off of this:

lookup(string $postcode) : Map Use this to lookup a single postcode and get back a map of the result
lookupBulk(Vector $postcodes) : Vector Use this to lookup a set of postcodes and get back a vector of maps
lookupLatLon(Pair<float, float> $geolocation) : Vector Use this to look up at latitude / longitude point and return a vector of maps - where each map represents a local postcodes to that position
lookupBulkLatLong(Vector<Pair<float, float>> $geolocations) : Vector<Vector> Use this to lookup a vector of longitude / latitude points and return a vector, of vectors, of maps. Where each first level represents a corresponding longitude / latitude point, and each sub-vector represents the local postcodes to that location
isValid(string $postcode) : bool Check to see if a postcode is valid (both regex and a UK postcode)
getNearest(string $postcode) : Vector Find the postcodes nearest to a given postcode, and return this as a Vector of Maps
autocomplete(string $postcode, int $limit = 10) : Vector Given part of a postcode, and the amount of results to return (limit is 100), return a Vector of potential full postcode strings
random() : Map Return a random postcode as a map

-getDistance(string $postcode1, string $postcode2) : num Return the shortest distance (straight line) between two postcodes, this uses the Haversine formula to calculate.

<?hh

include 'vendor/autoload.php';
use mfmbarber\HackPostcodes\Postcodes;
use mfmbarber\HackPostcodes\CurlRequest;

$postcodes = new Postcodes(new CurlRequest());

$x = $postcodes->lookup('DT51HG');
var_dump($x);

$y = $postcodes->lookupBulk(Vector {'DT51HG', 'BH122BL'});
var_dump($y);

$z = $postcodes->getDistance('DT51HG', 'BH122BL');
var_dump($z);

Tests

Tests have been written using PHPUnit, and can be run from the root of the project:

$ hhvm vendor/bin/phpunit tests/

Contributing

To contribute to this project

Create a fork of the project
Create a feature/bugfix branch off of develop
Commit your changes
Write your tests
Once you are happy - PR back into develop
Once reviewed, the PR is accepted.
Hurrah!

Ensure you comment your code!

License

This project is fully open sourced under MIT license

Mattamorphic/HackPostcodes