#!/usr/bin/php
<?php
// This script should be called by SUDO by another script and return number of items cleared
// Define duplicate cache keys to accommodate both label (static) and actual hostname (dynamic) calls

$sites = array(
  "cachedemo-prod"               => "/var/cache/nginx/cachedemo-prod",
  "cachedemo.example.com"        => "/var/cache/nginx/cachedemo-prod",

  "cachedemo-stage"              => "/var/cache/nginx/cachedemo-stage",
  "cachedemo-stage.example.com"  => "/var/cache/nginx/cachedemo-stage",
);

$siteArg = isset($argv[1])? $argv[1] : null;
if (!isset($sites[$siteArg])) {
  echo "Valid site argument required: \n\n";
  foreach ($sites as $key => $value) {
    echo "  $key\n";
  }
  echo "\nInvalid site argument: '$siteArg'";
  exit(1);
}

$siteName = $argv[1];
$siteCachePath = $sites[$siteName];
$log = date("h:i:s A T") . " - $siteName - ";


$descriptorspec = array(
  0 => array("pipe", "r"),  // stdin
  1 => array("pipe", "w"),  // stdout
  2 => array("pipe", "w"),  // stderr
);

// execute Linux system process
$process = proc_open("find \"$siteCachePath\" -type f -exec rm -v {} \; | wc -l", $descriptorspec, $pipes, dirname(__FILE__), null);

$stdout = stream_get_contents($pipes[1]);
$stderr = stream_get_contents($pipes[2]);
fclose($pipes[1]);
fclose($pipes[2]);

if ($stderr) {
  $log .= "ERROR $stderr";
} else {
  $log .= $stdout;
}

// Log to file
file_put_contents('/var/log/nginx/cache-clear.log', "$log", FILE_APPEND);

// Output total cleared
echo $stdout;