Doc server manifest page generation

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

+# Copyright 2013 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 collections import OrderedDict
+from copy import deepcopy
+from operator import itemgetter
+
+from third_party.json_schema_compiler.json_parse import Parse
+
+class ManifestDataSource(object):
+  '''Provides a template with access to manifest properties specific to apps or
+  extensions.
+  '''
+  def __init__(self,
+               compiled_fs_factory,
+               file_system,
+               manifest_path,
+               features_path):
+    self._manifest_path = manifest_path
+    self._features_path = features_path
+    self._file_system = file_system
+    self._cache = compiled_fs_factory.Create(
+        self._CreateManifestData, ManifestDataSource)
+
+  def _ApplyAppsTransformations(self, manifest):
+    manifest['required'][0]['example'] = 'Application'
+    manifest['optional'][-1]['is_last'] = True
+
+  def _ApplyExtensionsTransformations(self, manifest):
+    manifest['optional'][-1]['is_last'] = True
+
+  def _CreateManifestData(self, _, content):
+    '''Take the contents of |_manifest_path| and create apps and extensions
+    versions of a manifest example based on the contents of |_features_path|.
+    '''
+    def create_manifest_dict():
+      manifest_dict = OrderedDict()
+      for category in ('required', 'only_one', 'recommended', 'optional'):
+        manifest_dict[category] = []
+      return manifest_dict
+
+    apps = create_manifest_dict()
+    extensions = create_manifest_dict()
+
+    manifest_json = Parse(content)
+    features_json = Parse(self._file_system.ReadSingle(
+        self._features_path))
+
+    def add_property(feature, manifest_key, category):
+      '''If |feature|, from features_json, has the correct extension_types, add
+      |manifest_key| to either apps or extensions.
+      '''
+      added = False
+      extension_types = feature['extension_types']
+      if extension_types == 'all' or 'platform_app' in extension_types:
+        apps[category].append(deepcopy(manifest_key))
+        added = True
+      if extension_types == 'all' or 'extension' in extension_types:
+        extensions[category].append(deepcopy(manifest_key))
+        added = True
+      return added
+
+    # Property types are: required, only_one, recommended, and optional.
+    for category in manifest_json:
+      for manifest_key in manifest_json[category]:
+        # If a property is in manifest.json but not _manifest_features, this
+        # will cause an error.
+        feature = features_json[manifest_key['name']]
+        if add_property(feature, manifest_key, category):
+          del features_json[manifest_key['name']]
+
+    # All of the properties left in features_json are assumed to be optional.
+    for feature in features_json.keys():
+      item = features_json[feature]
+      # Handles instances where a features entry is a union with a whitelist.
+      if isinstance(item, list):
+        item = item[0]
+      add_property(item, {'name': feature}, 'optional')
+
+    apps['optional'].sort(key=itemgetter('name'))
+    extensions['optional'].sort(key=itemgetter('name'))
+
+    self._ApplyAppsTransformations(apps)
+    self._ApplyExtensionsTransformations(extensions)
+
+    return {'apps': apps, 'extensions': extensions}
+
+  def get(self, key):
+    return self._cache.GetFromFile(self._manifest_path)[key]