+<?php
+
+namespace pharext;
+
+trait License
+{
+ function findLicense($dir, $file = null) {
+ if (isset($file)) {
+ return realpath("$dir/$file");
+ }
+
+ $names = [];
+ foreach (["{,UN}LICEN{S,C}{E,ING}", "COPY{,ING,RIGHT}"] as $name) {
+ $names[] = $this->mergeLicensePattern($name, strtolower($name));
+ }
+ $exts = [];
+ foreach (["t{,e}xt", "rst", "asc{,i,ii}", "m{,ark}d{,own}", "htm{,l}"] as $ext) {
+ $exts[] = $this->mergeLicensePattern(strtoupper($ext), $ext);
+ }
+
+ $pattern = "{". implode(",", $names) ."}{,.{". implode(",", $exts) ."}}";
+
+ if (($glob = glob("$dir/$pattern", GLOB_BRACE))) {
+ return current($glob);
+ }
+ }
+
+ private function mergeLicensePattern($upper, $lower) {
+ $pattern = "";
+ $length = strlen($upper);
+ for ($i = 0; $i < $length; ++$i) {
+ if ($lower{$i} === $upper{$i}) {
+ $pattern .= $upper{$i};
+ } else {
+ $pattern .= "[" . $upper{$i} . $lower{$i} . "]";
+ }
+ }
+ return $pattern;
+ }
+
+ public function readLicense($file) {
+ $text = file_get_contents($file);
+ switch (strtolower(pathinfo($file, PATHINFO_EXTENSION))) {
+ case "htm":
+ case "html":
+ $text = strip_tags($text);
+ break;
+ }
+ return $text;
+ }
+}