function to update the config file from version to version

I currently update some var names, add new themes and remove cyan theme, add new proxies, add new emoticons
If things are missing add them there

src/common/optparser.py

@@ -26,6 +26,8 @@ _ = i18n._
 class OptionsParser:
 	def __init__(self, filename):
 		self.__filename = filename
+		self.old_values = {} # values that are saved in the file and maybe
+									# no longer valid
 
 	def read_line(self, line):
 		index = line.find(' = ')
@@ -36,6 +38,7 @@ class OptionsParser:
 		i_end = var_str.rfind('.')
 		
 		if i_start == -1:
+			self.old_values[var_str] = value_str
 			gajim.config.set(var_str, value_str)
 		else:
 			optname = var_str[0:i_start]
@@ -53,12 +56,17 @@ class OptionsParser:
 				print _('error: cannot open %s for reading') % self.__filename
 			return
 
+		new_version = gajim.config.get('version')
 		for line in fd.readlines():
 			try:
 				line = line.decode('utf-8')
 			except UnicodeDecodeError:
 				line = line.decode(locale.getpreferredencoding())
 			self.read_line(line)
+		old_version = gajim.config.get('version')
+
+		self.update_config(old_version, new_version)
+		self.old_values = {} # clean mem
 
 		fd.close()
 
@@ -116,3 +124,53 @@ class OptionsParser:
 		except IOError, e:
 			return e.errno
 		os.chmod(self.__filename, 0600)
+
+	def update_config(self, old_version, new_version):
+		if old_version < '0.9' and new_version == '0.9':
+			self.update_config_x_to_09()
+	
+	def update_config_x_to_09(self):
+		# Var name that changed:
+		# avatar_width /height -> chat_avatar_width / height
+		if self.old_values.has_key('avatar_width'):
+			gajim.config.set('chat_avatar_width', self.old_values['avatar_width'])
+		if self.old_values.has_key('avatar_height'):
+			gajim.config.set('chat_avatar_height', self.old_values['avatar_height'])
+		# always_compact_view -> always_compact_view_chat / _gc
+		if self.old_values.has_key('always_compact_view'):
+			gajim.config.set('always_compact_view_chat',
+				self.old_values['always_compact_view'])
+			gajim.config.set('always_compact_view_gc',
+				self.old_values['always_compact_view'])
+		# new theme: grocery, plain
+		d = ['accounttextcolor', 'accountbgcolor', 'accountfont',
+			'accountfontattrs', 'grouptextcolor', 'groupbgcolor', 'groupfont',
+			'groupfontattrs', 'contacttextcolor', 'contactbgcolor', 'contactfont',
+			'contactfontattrs', 'bannertextcolor', 'bannerbgcolor']
+		for theme_name in ['grocery', 'plain']:
+			if theme_name not in gajim.config.get_per('themes'):
+				gajim.config.add_per('themes', theme_name)
+				theme = gajim.config.themes_default[theme_name]
+				for o in d:
+					gajim.config.set_per('themes', theme_name, o, theme[d.index(o)])
+		# Remove cyan theme if it's not the default theme
+		if gajim.config.get('roster_theme') != 'cyan' and \
+			'cyan' in gajim.config.get_per('themes'):
+			gajim.config.del_per('themes', 'cyan')
+		# new proxies in accounts.name.file_transfer_proxies
+		for account in gajim.config.get_per('accounts'):
+			proxies = gajim.config.get_per('accounts', account,
+				'file_transfer_proxies')
+			for new in ['proxy.netlab.cz', 'proxy65.jabber.ccc.de',
+				'proxy65.unstable.nl']:
+				if proxies.find(new) < 0:
+					proxies += ', ' + new
+			gajim.config.set_per('accounts', account,'file_transfer_proxies',
+				proxies)
+		# Add some emots :-* :* >:) >:-) <3
+		for emot in [':-*', ':*', '>:)', '>:-)', '<3']:
+			if emot not in gajim.config.get_per('emoticons'):
+				gajim.config.add_per('emoticons', emot)
+				gajim.config.set_per('emoticons', emot, 'path',
+					gajim.config.emoticons_default[emot])
+		gajim.config.set('version', '0.9')