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Discussion on: Code Challenge: Follow the Dirty Money

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Richard Orelup

My quick PHP solution

<?php

$initialTransaction = "https://gist.githubusercontent.com/jorinvo/6f68380dd07e5db3cf5fd48b2465bb04/raw/c02b1e0b45ecb2e54b36e4410d0631a66d474323/fd0d929f-966f-4d1a-89cd-feee5a1c5347.json";
$transactions = array();

function followTheMoney($transactionUrl) {
  global $transactions;

  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $transactionUrl);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  $transactionJson = curl_exec($ch);
  curl_close($ch);

  $transaction = json_decode($transactionJson, true);
  $amount = str_replace(",",".",explode(" ",end(explode('$',$transaction['content'])))[0]);
  $transactions[$transaction['id']] = $amount;

  foreach ($transaction['links'] as $link) {
    if (!array_key_exists(explode(".json",end(explode("/",$link)))[0],$transactions)) {
      followTheMoney($link);
    }
  }
}

followTheMoney($initialTransaction);

$total = array_sum($transactions);

echo "Total - " . $total . "\n\n";

?>