1 files changed, 41 insertions, 0 deletions
diff --git a/deps/npm/lib/search/package-filter.js b/deps/npm/lib/search/package-filter.js
new file mode 100644
index 0000000000..ac2950f46b
--- /dev/null
+++ b/deps/npm/lib/search/package-filter.js
@@ -0,0 +1,41 @@
+'use strict'
+
+module.exports = filter
+function filter (data, include, exclude, opts) {
+  return typeof data === 'object' &&
+         filterWords(data, include, exclude, opts)
+}
+
+function getWords (data, opts) {
+  return [ data.name ]
+  .concat((opts && opts.description) ? data.description : [])
+  .concat((data.maintainers || []).map(function (m) {
+    return '=' + m.name
+  }))
+  .concat(data.versions && data.versions.length && data.url && ('<' + data.url + '>'))
+  .concat(data.keywords || [])
+  .map(function (f) { return f && f.trim && f.trim() })
+  .filter(function (f) { return f })
+  .join(' ')
+  .toLowerCase()
+}
+
+function filterWords (data, include, exclude, opts) {
+  var words = getWords(data, opts)
+  for (var i = 0, l = include.length; i < l; i++) {
+    if (!match(words, include[i])) return false
+  }
+  for (i = 0, l = exclude.length; i < l; i++) {
+    if (match(words, exclude[i])) return false
+  }
+  return true
+}
+
+function match (words, pattern) {
+  if (pattern.charAt(0) === '/') {
+    pattern = pattern.replace(/\/$/, '')
+    pattern = new RegExp(pattern.substr(1, pattern.length - 1))
+    return words.match(pattern)
+  }
+  return words.indexOf(pattern) !== -1
+}