Docserver: separate models for apps and extensions

chrome/common/extensions/docs/server2/platform_util.py

+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from path_util import AssertIsValid
+
+
+_EXTENSION_TYPES = {'extensions': 'extension', 'apps': 'platform_app'}
+
+
+def GetPlatforms():
+  return ('apps', 'extensions')
+
+
+def GetExtensionTypes():
+  return ('platform_app', 'extension')
+
+
+def ExtractPlatformFromURL(url):
+  '''Returns 'apps' or 'extensions' depending on the URL.
+  '''
+  AssertIsValid(url)
+  platform = url.split('/', 1)[0]
+  if platform not in GetPlatforms():
+    return None
+  return platform
+
+
+def PluralToSingular(platform):
+  '''Converts 'apps' to 'app' and 'extensions' to 'extension'.
+  '''
+  assert platform in GetPlatforms(), platform
+  return platform[:-1]
+
+
+def PlatformToExtensionType(platform):
+  assert platform in GetPlatforms(), platform
+  return _EXTENSION_TYPES[platform]