src/chrome/common/extensions/docs/server2/whats_new_data_source.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 from itertools import groupby
   6 from operator import itemgetter
   7 import posixpath
   8
   9 from data_source import DataSource
  10 from extensions_paths import JSON_TEMPLATES, PUBLIC_TEMPLATES
  11 from future import Future
  12 from platform_util import GetPlatforms
  13
  14
  15 class WhatsNewDataSource(DataSource):
  16   ''' This class creates a list of "what is new" by chrome version.
  17   '''
  18
  19   def __init__(self, server_instance, _):
  20     self._parse_cache = server_instance.compiled_fs_factory.ForJson(
  21         server_instance.host_file_system_provider.GetMaster())
  22     self._object_store = server_instance.object_store_creator.Create(
  23         WhatsNewDataSource)
  24     self._platform_bundle = server_instance.platform_bundle
  25
  26   def _GenerateChangesListWithVersion(self, platform, whats_new_json):
  27     return [{
  28       'id': change_id,
  29       'type': change['type'],
  30       'description': change['description'],
  31       'version': change['version']
  32     } for change_id, change in whats_new_json.iteritems()]
  33
  34   def _GetAPIVersion(self, platform, api_name):
  35     version = None
  36     category = self._platform_bundle.GetAPICategorizer(platform).GetCategory(
  37         api_name)
  38     if category == 'chrome':
  39       channel_info = self._platform_bundle.GetAvailabilityFinder(
  40           platform).GetAPIAvailability(api_name).channel_info
  41       channel = channel_info.channel
  42       if channel == 'stable':
  43         version = channel_info.version
  44     return version
  45
  46   def _GenerateAPIListWithVersion(self, platform):
  47     data = []
  48     for api_name, api_model in self._platform_bundle.GetAPIModels(
  49         platform).IterModels():
  50       version = self._GetAPIVersion(platform, api_name)
  51       if version:
  52         api = {
  53           'name': api_name,
  54           'description': api_model.description,
  55           'version' : version,
  56           'type': 'apis',
  57         }
  58         data.append(api)
  59     data.sort(key=itemgetter('version'))
  60     return data
  61
  62   def _GenerateWhatsNewDict(self):
  63     whats_new_json_future = self._parse_cache.GetFromFile(
  64         posixpath.join(JSON_TEMPLATES, 'whats_new.json'))
  65     def _MakeDictByPlatform(platform):
  66       whats_new_json = whats_new_json_future.Get()
  67       platform_list = []
  68       apis = self._GenerateAPIListWithVersion(platform)
  69       apis.extend(self._GenerateChangesListWithVersion(platform,
  70           whats_new_json))
  71       apis.sort(key=itemgetter('version'), reverse=True)
  72       for version, group in groupby(apis, key=itemgetter('version')):
  73         whats_new_by_version = {
  74           'version': version,
  75         }
  76         for item in group:
  77           item_type = item['type']
  78           if item_type not in whats_new_by_version:
  79             whats_new_by_version[item_type] = []
  80           whats_new_by_version[item_type].append(item)
  81         platform_list.append(whats_new_by_version)
  82       return platform_list
  83
  84     def resolve():
  85       return dict((platform, _MakeDictByPlatform(platform))
  86           for platform in GetPlatforms())
  87     return Future(callback=resolve)
  88
  89   def _GetCachedWhatsNewData(self):
  90     data = self._object_store.Get('whats_new_data').Get()
  91     if data is None:
  92       data = self._GenerateWhatsNewDict().Get()
  93       self._object_store.Set('whats_new_data', data)
  94     return data
  95
  96   def get(self, key):
  97     return self._GetCachedWhatsNewData().get(key)
  98
  99   def Refresh(self, path):
 100     return self._GenerateWhatsNewDict()