Injection stuff.

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

 # Copyright (c) 2012 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.
 
 import json
 import logging
 import os
 
 from handlebar_dict_generator import HandlebarDictGenerator
 import third_party.json_schema_compiler.json_comment_eater as json_comment_eater
 import third_party.json_schema_compiler.model as model
 import third_party.json_schema_compiler.idl_schema as idl_schema
 import third_party.json_schema_compiler.idl_parser as idl_parser
 
 class APIDataSource(object):
   """This class fetches and loads JSON APIs from the FileSystem passed in with
   |cache_builder|, so the APIs can be plugged into templates.
   """
   class Factory(object):
-    def __init__(self, cache_builder, base_path):
-      self._cache_builder = cache_builder
+    def __init__(self, cache_builder, base_path, samples_factory):
+      self._json_cache = cache_builder.build(self._LoadJsonAPI)
+      self._idl_cache = cache_builder.build(self._LoadIdlAPI)
+      self._permissions_cache = cache_builder.build(self._LoadPermissions)
       self._base_path = base_path
+      self._samples_factory = samples_factory
 
-    def Create(self, samples):
-      return APIDataSource(self._cache_builder, self._base_path, samples)
+    def Create(self, request):
+      return APIDataSource(self._json_cache,
+                           self._idl_cache,
+                           self._permissions_cache,
+                           self._samples_factory.Create(request),
+                           self._base_path)
 
-  def __init__(self, cache_builder, base_path, samples):
-    self._permissions_cache = cache_builder.build(self._LoadPermissions)
-    self._json_cache = cache_builder.build(self._LoadJsonAPI)
-    self._idl_cache = cache_builder.build(self._LoadIdlAPI)
+    def _LoadJsonAPI(self, api):
+      return HandlebarDictGenerator(json.loads(json_comment_eater.Nom(api))[0])
+
+    def _LoadIdlAPI(self, api):
+      idl = idl_parser.IDLParser().ParseData(api)
+      return HandlebarDictGenerator(idl_schema.IDLSchema(idl).process()[0])
+
+    def _LoadPermissions(self, json_str):
+      return json.loads(json_comment_eater.Nom(json_str))
+
+  def __init__(self,
+               json_cache,
+               idl_cache,
+               permissions_cache,
+               samples,
+               base_path):
+    self._json_cache = json_cache
+    self._idl_cache = idl_cache
+    self._permissions_cache = permissions_cache
+    self._samples = samples
     self._base_path = base_path
-    self._samples = samples
 
   def _GetFeature(self, path):
     # Remove 'experimental_' from path name to match the keys in
     # _permissions_features.json.
     path = path.replace('experimental_', '')
     try:
       perms = self._permissions_cache.GetFromFile(
           self._base_path + '/_permission_features.json')
       api_perms = perms.get(path, None)
       if api_perms['channel'] == 'dev':
         api_perms['dev'] = True
       return api_perms
     except Exception:
       return None
 
-  def _LoadPermissions(self, perms_json):
-    return json.loads(json_comment_eater.Nom(perms_json))
-
-  def _LoadJsonAPI(self, api):
-    generator = HandlebarDictGenerator(
-        json.loads(json_comment_eater.Nom(api))[0], self._samples)
-    return generator.Generate()
-
-  def _LoadIdlAPI(self, api):
-    idl = idl_parser.IDLParser().ParseData(api)
-    generator = HandlebarDictGenerator(
-        idl_schema.IDLSchema(idl).process()[0], self._samples)
-    return generator.Generate()
-
-  def _AddPermissionsDict(self, api_dict, path):
+  def _GenerateHandlebarContext(self, handlebar, path):
     return_dict = { 'permissions': self._GetFeature(path) }
-    return_dict.update(api_dict)
+    return_dict.update(handlebar.Generate(self._samples.GetAll()))
     return return_dict
 
   def __getitem__(self, key):
     return self.get(key)
 
   def get(self, key):
     path, ext = os.path.splitext(key)
     unix_name = model.UnixName(path)
     json_path = unix_name + '.json'
     idl_path = unix_name + '.idl'
     try:
-      return self._AddPermissionsDict(self._json_cache.GetFromFile(
-          self._base_path + '/' + json_path), path)
-    except Exception:
+      return self._GenerateHandlebarContext(
+          self._json_cache.GetFromFile(self._base_path + '/' + json_path), path)
+    except OSError:
       try:
-        return self._AddPermissionsDict(self._idl_cache.GetFromFile(
-            self._base_path + '/' + idl_path), path)
-      except Exception as e:
-        logging.warn(e)
-        raise
+        return self._GenerateHandlebarContext(
+            self._idl_cache.GetFromFile(self._base_path + '/' + idl_path), path)
+      except OSError:
+        return None