Create a conf module. Move activity registry out of the shell

(should only be graphical) into it.

sugar/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = activity canvas chat p2p presence
+SUBDIRS = activity canvas chat conf p2p presence
 
 sugardir = $(pythondir)/sugar
 sugar_PYTHON =				\

sugar/conf/ActivityRegistry.py

@@ -0,0 +1,118 @@
+import logging
+import os
+from ConfigParser import ConfigParser
+from ConfigParser import NoOptionError
+
+class ActivityModule:
+	"""Info about an activity module. Wraps a .activity file."""
+	
+	def __init__(self, name, activity_id, directory):
+		self._name = name
+		self._icon = None
+		self._id = activity_id
+		self._directory = directory
+		self._show_launcher = False	
+
+	def get_name(self):
+		"""Get the activity user visible name."""
+		return self._name
+
+	def get_id(self):
+		"""Get the activity identifier"""
+		return self._id
+
+	def get_icon(self):
+		"""Get the activity icon name"""
+		return self._icon
+
+	def set_icon(self, icon):
+		"""Set the activity icon name"""
+		self._icon = icon
+
+	def get_directory(self):
+		"""Get the path to activity directory."""
+		return self._directory
+		
+	def get_default_type(self):
+		"""Get the the type of the default activity service."""
+		return self._default_type
+
+	def set_default_type(self, default_type):
+		"""Set the the type of the default activity service."""
+		self._default_type = default_type
+
+	def get_show_launcher(self):
+		"""Get whether there should be a visible launcher for the activity"""
+		return self._show_launcher
+
+	def set_show_launcher(self, show_launcher):
+		"""Set whether there should be a visible launcher for the activity"""
+		self._show_launcher = show_launcher
+
+class ActivityRegistry:
+	"""Service that tracks the available activities"""
+
+	def __init__(self):
+		self._activities = []
+
+	def get_activity_from_id(self, activity_id):
+		"""Returns an activity given his identifier"""
+		for activity in self._activities:
+			if activity.get_id() == activity_id:
+				return activity
+		return None
+	
+	def get_activity(self, default_type):
+		"""Returns an activity given his default type"""
+		for activity in self._activities:
+			if activity.get_default_type() == default_type:
+				return activity
+		return None
+	
+	def scan_directory(self, path):
+		"""Scan a directory for activities and add them to the registry.""" 
+		if os.path.isdir(path):
+			for f in os.listdir(path):
+				if f.endswith(".activity"):
+					self.add(os.path.join(path, f))
+
+	def add(self, path):
+		"""Add an activity to the registry. The path points to a .activity file."""
+		cp = ConfigParser()
+		cp.read([path])
+
+		directory = os.path.dirname(path)
+
+		try:
+			activity_id = cp.get('Activity', 'id')
+		except NoOptionError:
+			logging.error('%s miss the required id option' % (path))
+			return False
+
+		try:
+			name = cp.get('Activity', 'name')
+		except NoOptionError:
+			logging.error('%s miss the required name option' % (path))
+			return False
+
+		if cp.has_option('Activity', 'default_type'):
+			default_type = cp.get('Activity', 'default_type')
+		else:
+			default_type = None
+
+		module = ActivityModule(name, activity_id, directory)
+		self._activities.append(module)
+
+		if cp.has_option('Activity', 'show_launcher'):
+			module.set_show_launcher(True)
+
+		if cp.has_option('Activity', 'icon'):
+			module.set_icon(cp.get('Activity', 'icon'))
+
+		module.set_default_type(default_type)
+
+		return True
+
+	def list_activities(self):
+		"""Enumerate the registered activities as an ActivityModule list."""
+		return self._activities

sugar/conf/Makefile.am

@@ -0,0 +1,4 @@
+sugardir = $(pythondir)/sugar/conf
+sugar_PYTHON =				\
+	__init__.py			\
+	ActivityRegistry.py

sugar/conf/__init__.py

@@ -0,0 +1,6 @@
+from sugar.conf.ActivityRegistry import ActivityRegistry
+
+__registry = ActivityRegistry()
+
+def get_activity_registry():
+	return __registry

sugar/env.py

@@ -8,6 +8,7 @@ except ImportError:
 	from sugar.__installed__ import *
 
 import sugar.setup
+import sugar.conf
 
 def add_to_python_path(path):
 	sys.path.insert(0, path)
@@ -40,6 +41,9 @@ def setup():
 		sugar.setup.write_service('org.laptop.Presence', bin,
 								  get_services_dir())
 
+	registry = sugar.conf.get_activity_registry()
+	registry.scan_directory(get_activities_dir())
+
 def get_user_dir():
 	if os.environ.has_key('SUGAR_NICK_NAME'):
 		nick = get_nick_name()