Dynamically generate a heading for Extension Docs API pages

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

Index: chrome/common/extensions/docs/server2/api_data_source.py
diff --git a/chrome/common/extensions/docs/server2/api_data_source.py b/chrome/common/extensions/docs/server2/api_data_source.py
index 70d52e71e580439a69b160a420dfbc4e5e0566eb..7954b9f0a960cd2856766e56f1f003c933eec722 100644
--- a/chrome/common/extensions/docs/server2/api_data_source.py
+++ b/chrome/common/extensions/docs/server2/api_data_source.py
@@ -50,9 +50,14 @@ class _JSCModel(object):
   """Uses a Model from the JSON Schema Compiler and generates a dict that
   a Handlebar template can use for a data source.
   """
-  def __init__(self, json, ref_resolver, disable_refs):
+  def __init__(self,
+               json,
+               ref_resolver,
+               disable_refs,
+               availability_data_source):
     self._ref_resolver = ref_resolver
     self._disable_refs = disable_refs
+    self._availability_data_source = availability_data_source
     clean_json = copy.deepcopy(json)
     if _RemoveNoDocs(clean_json):
       self._namespace = None
@@ -76,12 +81,31 @@ class _JSCModel(object):
       return {}
     return {
       'name': self._namespace.name,
+      'description': self._namespace.description,
+      'availability': self._GetAvailability(),
       'types': self._GenerateTypes(self._namespace.types.values()),
       'functions': self._GenerateFunctions(self._namespace.functions),
       'events': self._GenerateEvents(self._namespace.events),
       'properties': self._GenerateProperties(self._namespace.properties)
     }
 
+  def _GetAvailability(self):
+    """Finds the earliest version of chrome where an API was available using
+    AvailabilityDataSource. Also [temporarily] creates a string describing the
+    availability depending on its original format.
+    """
+    availability_string = 'Not Currently Available'
+    availability = self._availability_data_source.FindEarliestAvailability(
+        self._namespace.name)
+
+    if availability is not None:
+      if availability.isdigit():
+        availability_string = 'Chrome %s' % availability
+      else:
+        availability_string = ('Chrome %s Channel Only' %
+            availability.capitalize())
+    return availability_string
+
   def _GenerateTypes(self, types):
     return [self._GenerateType(t) for t in types]
 
@@ -268,7 +292,10 @@ class APIDataSource(object):
   |compiled_fs_factory|, so the APIs can be plugged into templates.
   """
   class Factory(object):
-    def __init__(self, compiled_fs_factory, base_path):
+    def __init__(self,
+                 compiled_fs_factory,
+                 base_path,
+                 availability_data_source_factory):
       def create_compiled_fs(fn, category):
         return compiled_fs_factory.Create(
             fn, APIDataSource, category=category, version=_VERSION)
@@ -297,7 +324,7 @@ class APIDataSource(object):
       self._names_cache = create_compiled_fs(self._GetAllNames, 'names')
 
       self._base_path = base_path
-
+      self._availability_data_source = availability_data_source_factory.Create()
       # These must be set later via the SetFooDataSourceFactory methods.
       self._ref_resolver_factory = None
       self._samples_data_source_factory = None
@@ -343,14 +370,16 @@ class APIDataSource(object):
       return _JSCModel(
           json_parse.Parse(api)[0],
           self._ref_resolver_factory.Create() if not disable_refs else None,
-          disable_refs).ToDict()
+          disable_refs,
+          self._availability_data_source).ToDict()
 
     def _LoadIdlAPI(self, api, disable_refs):
       idl = idl_parser.IDLParser().ParseData(api)
       return _JSCModel(
           idl_schema.IDLSchema(idl).process()[0],
           self._ref_resolver_factory.Create() if not disable_refs else None,
-          disable_refs).ToDict()
+          disable_refs,
+          self._availability_data_source).ToDict()
 
     def _GetIDLNames(self, base_dir, apis):
       return self._GetExtNames(apis, ['idl'])
@@ -430,21 +459,26 @@ class APIDataSource(object):
   def _GetAsSubdirectory(self, name):
     if name.startswith('experimental_'):
       parts = name[len('experimental_'):].split('_', 1)
-      parts[1] = 'experimental_%s' % parts[1]
-      return '/'.join(parts)
+      if len(parts) > 1:
+        parts[1] = 'experimental_%s' % parts[1]
+        return '/'.join(parts)
+      else:
+        return '%s/%s' % (parts[0], name)
     return name.replace('_', '/', 1)
 
-  def get(self, key):
+  def _DetermineNamesForGet(self, key):
     if key.endswith('.html') or key.endswith('.json') or key.endswith('.idl'):
       path, ext = os.path.splitext(key)
     else:
       path = key
     unix_name = model.UnixName(path)
-    idl_names = self._idl_names_cache.GetFromFileListing(self._base_path)
     names = self._names_cache.GetFromFileListing(self._base_path)
     if unix_name not in names and self._GetAsSubdirectory(unix_name) in names:
       unix_name = self._GetAsSubdirectory(unix_name)
+    return (path, unix_name)
 
+  def _DetermineCacheForGet(self, unix_name):
+    idl_names = self._idl_names_cache.GetFromFileListing(self._base_path)
     if self._disable_refs:
       cache, ext = (
           (self._idl_cache_no_refs, '.idl') if (unix_name in idl_names) else
@@ -452,6 +486,11 @@ class APIDataSource(object):
     else:
       cache, ext = ((self._idl_cache, '.idl') if (unix_name in idl_names) else
                     (self._json_cache, '.json'))
+    return (cache, ext)
+
+  def get(self, key):
+    path, unix_name = self._DetermineNamesForGet(key)
+    cache, ext = self._DetermineCacheForGet(unix_name)
     return self._GenerateHandlebarContext(
         cache.GetFromFile('%s/%s%s' % (self._base_path, unix_name, ext)),
         path)