GitHubScoreCalculator.php

<?php

use Illuminate\Support\Facades\Http;

class GitHubScoreCalculator
{
    const ENDPOINT = 'https://api.github.com/users/%s/events/public';

    const DEFAULT_SCORE_KEY = 'default';

    private $points = [
        'PushEvent' => 10,
        'PullRequestEvent' => 5,
        'IssueCommentEvent' => 4,
        self::DEFAULT_SCORE_KEY => 1,
    ];

    public function calculate($username)
    {
        return $this->fetchEvents($username)
            ->pluck('type')
            ->countBy()
            ->map(function ($count, $event) {
                return $this->calculateEventScore($count, $event);
            })
            ->sum();
    }

    private function fetchEvents($username)
    {
        $url = sprintf(self::ENDPOINT, $username);

        return collect(
            Http::get($url)->json()
        );
    }

    private function calculateEventScore($count, $event)
    {
        if (! array_key_exists($event, $this->points)) {
            $event = self::DEFAULT_SCORE_KEY;
        }

        return $count * $this->points[$event];
    }
}