Update To 11.40.268.0
[platform/framework/web/crosswalk.git] / src / chrome / common / extensions / docs / server2 / samples_model.py
1 # Copyright 2014 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 import json
6 import logging
7 import posixpath
8 import re
9
10 from extensions_paths import EXAMPLES
11 from samples_data_source import SamplesDataSource
12 import third_party.json_schema_compiler.json_comment_eater as json_comment_eater
13 import url_constants
14
15
16 _DEFAULT_ICON_PATH = 'images/sample-default-icon.png'
17
18
19 def _GetAPIItems(js_file):
20   chrome_pattern = r'chrome[\w.]+'
21   # Add API calls that appear normally, like "chrome.runtime.connect".
22   calls = set(re.findall(chrome_pattern, js_file))
23   # Add API calls that have been assigned into variables, like
24   # "var storageArea = chrome.storage.sync; storageArea.get", which should
25   # be expanded like "chrome.storage.sync.get".
26   for match in re.finditer(r'var\s+(\w+)\s*=\s*(%s);' % chrome_pattern,
27                            js_file):
28     var_name, api_prefix = match.groups()
29     for var_match in re.finditer(r'\b%s\.([\w.]+)\b' % re.escape(var_name),
30                                  js_file):
31       api_suffix, = var_match.groups()
32       calls.add('%s.%s' % (api_prefix, api_suffix))
33   return calls
34
35
36 class SamplesModel(object):
37   def __init__(self,
38                extension_samples_file_system,
39                app_samples_file_system,
40                compiled_fs_factory,
41                reference_resolver,
42                base_path,
43                platform):
44     self._samples_fs = (extension_samples_file_system if
45                         platform == 'extensions' else app_samples_file_system)
46     self._samples_cache = compiled_fs_factory.Create(
47         self._samples_fs,
48         self._MakeSamplesList,
49         SamplesDataSource,
50         category=platform)
51     self._text_cache = compiled_fs_factory.ForUnicode(self._samples_fs)
52     self._reference_resolver = reference_resolver
53     self._base_path = base_path
54     self._platform = platform
55
56   def GetCache(self):
57     return self._samples_cache
58
59   def FilterSamples(self, api_name):
60     '''Fetches and filters the list of samples for this platform, returning
61     a Future to the only the samples that use the API |api_name|.
62     '''
63     def filter_samples(samples_list):
64       return [sample for sample in samples_list
65           if any(call['name'].startswith(api_name + '.')
66           for call in sample['api_calls'])]
67     def handle_error(_):
68       # TODO(rockot): This cache is probably not working as intended, since
69       # it can still lead to underlying filesystem (e.g. gitiles) access
70       # while processing live requests. Because this can fail, we at least
71       # trap and log exceptions to prevent 500s from being thrown.
72       logging.warning('Unable to get samples listing. Skipping.')
73       return []
74     platform_for_samples = '' if self._platform == 'apps' else EXAMPLES
75     return (self._samples_cache.GetFromFileListing(platform_for_samples)
76             .Then(filter_samples, error_handler=handle_error))
77
78   def _GetDataFromManifest(self, path, file_system):
79     manifest = self._text_cache.GetFromFile(path + '/manifest.json').Get()
80     try:
81       manifest_json = json.loads(json_comment_eater.Nom(manifest))
82     except ValueError as e:
83       logging.error('Error parsing manifest.json for %s: %s' % (path, e))
84       return None
85     l10n_data = {
86       'name': manifest_json.get('name', ''),
87       'description': manifest_json.get('description', None),
88       'icon': manifest_json.get('icons', {}).get('128', None),
89       'default_locale': manifest_json.get('default_locale', None),
90       'locales': {}
91     }
92     if not l10n_data['default_locale']:
93       return l10n_data
94     locales_path = path + '/_locales/'
95     locales_dir = file_system.ReadSingle(locales_path).Get()
96     if locales_dir:
97       def load_locale_json(path):
98         return (path, json.loads(self._text_cache.GetFromFile(path).Get()))
99
100       try:
101         locales_json = [load_locale_json(locales_path + f + 'messages.json')
102                         for f in locales_dir]
103       except ValueError as e:
104         logging.error('Error parsing locales files for %s: %s' % (path, e))
105       else:
106         for path, json_ in locales_json:
107           l10n_data['locales'][path[len(locales_path):].split('/')[0]] = json_
108     return l10n_data
109
110   def _MakeSamplesList(self, base_path, files):
111     samples_list = []
112     for filename in sorted(files):
113       if filename.rsplit('/')[-1] != 'manifest.json':
114         continue
115
116       # This is a little hacky, but it makes a sample page.
117       sample_path = filename.rsplit('/', 1)[-2]
118       sample_files = [path for path in files
119                       if path.startswith(sample_path + '/')]
120       js_files = [path for path in sample_files if path.endswith('.js')]
121       js_contents = [self._text_cache.GetFromFile(
122           posixpath.join(base_path, js_file)).Get()
123           for js_file in js_files]
124       api_items = set()
125       for js in js_contents:
126         api_items.update(_GetAPIItems(js))
127
128       api_calls = []
129       for item in sorted(api_items):
130         if len(item.split('.')) < 3:
131           continue
132         if item.endswith('.removeListener') or item.endswith('.hasListener'):
133           continue
134         if item.endswith('.addListener'):
135           item = item[:-len('.addListener')]
136         if item.startswith('chrome.'):
137           item = item[len('chrome.'):]
138         ref_data = self._reference_resolver.GetLink(item)
139         # TODO(kalman): What about references like chrome.storage.sync.get?
140         # That should link to either chrome.storage.sync or
141         # chrome.storage.StorageArea.get (or probably both).
142         # TODO(kalman): Filter out API-only references? This can happen when
143         # the API namespace is assigned to a variable, but it's very hard to
144         # to disambiguate.
145         if ref_data is None:
146           continue
147         api_calls.append({
148           'name': ref_data['text'],
149           'link': ref_data['href']
150         })
151
152       if self._platform == 'apps':
153         url = url_constants.GITHUB_BASE + '/' + sample_path
154         icon_base = url_constants.RAW_GITHUB_BASE + '/' + sample_path
155         download_url = url
156       else:
157         extension_sample_path = posixpath.join('examples', sample_path)
158         url = extension_sample_path
159         icon_base = extension_sample_path
160         download_url = extension_sample_path + '.zip'
161
162       manifest_data = self._GetDataFromManifest(
163           posixpath.join(base_path, sample_path),
164           self._samples_fs)
165       if manifest_data['icon'] is None:
166         icon_path = posixpath.join(
167             self._base_path, 'static', _DEFAULT_ICON_PATH)
168       else:
169         icon_path = '%s/%s' % (icon_base, manifest_data['icon'])
170       manifest_data.update({
171         'icon': icon_path,
172         'download_url': download_url,
173         'url': url,
174         'files': [f.replace(sample_path + '/', '') for f in sample_files],
175         'api_calls': api_calls
176       })
177       samples_list.append(manifest_data)
178
179     return samples_list