--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/backend/sqlalchemy/Preferences.py	Sun Aug 21 03:55:16 2011 +0200
@@ -0,0 +1,100 @@
+
+from Preference import Preference
+
+DAYS_TO_KEEP_FEED_ENTRIES = "DAYS_TO_KEEP_FEED_ENTRIES"
+HIDE_READ_ENTRIES = "HIDE_READ_FEED_ENTRIES"
+PROXY_HOST = "PROXY_HOST"
+PROXY_PORT = "PROXY_PORT"
+SHOW_ONLY_UNREAD_FEEDS = "SHOW_ONLY_UNREAD_FEEDS"
+START_MAXIMIZED = "START_MAXIMIZED"
+
+def str2bool(string):
+    return string.lower() in ["yes", "true", "t", "1"]
+
+def bool2str(bool):
+    if bool:
+        return "True"
+    else:
+        return "False"
+
+class Preferences(object):
+    def __init__(self, session):
+        self.session = session
+        self.cache = {}
+
+    def _cachedPreference(self, key, defaultValue=None, addIfMissing=True):
+        if self.cache.has_key(key):
+            return self.cache[key]
+        else:
+            pref = Preference.forKey(key, self.session)
+            if pref is not None:
+                self.cache[key] = pref
+            elif pref is None and addIfMissing:
+                pref = Preference(key, str(defaultValue))
+                self.session.add(pref)
+                self.cache[key] = pref
+            return pref
+
+    def startMaximized(self):
+        pref = self._cachedPreference(START_MAXIMIZED, False)
+        return str2bool(pref.value)
+
+    def setStartMaximized(self, flag):
+        pref = self._cachedPreference(START_MAXIMIZED)
+        pref.value = bool2str(flag)
+
+    def hideReadFeedEntries(self):
+        pref = self._cachedPreference(HIDE_READ_ENTRIES, False)
+        return str2bool(pref.value)
+
+    def setHideReadFeedEntries(self, flag):
+        pref = self._cachedPreference(HIDE_READ_ENTRIES)
+        pref.value = bool2str(flag)
+
+    def showOnlyUnreadFeeds(self):
+        pref = self._cachedPreference(SHOW_ONLY_UNREAD_FEEDS, False)
+        return str2bool(pref.value)
+
+    def setShowOnlyUnreadFeeds(self, flag):
+        pref = self._cachedPreference(SHOW_ONLY_UNREAD_FEEDS)
+        pref.value = bool2str(flag)
+
+    def proxyHost(self):
+        pref = self._cachedPreference(PROXY_HOST)
+        return pref.value
+
+    def setProxyHost(self, hostname):
+        if hostname is None:
+            pref = self._cachedPreference(PROXY_HOST, addIfMissing=False)
+            if pref is not None:
+                self.session.delete(pref)
+                del(self.cache[PROXY_HOST])
+        else:
+            pref = self._cachedPreference(PROXY_HOST)
+            pref.value = str(hostname)
+
+    def proxyPort(self):
+        pref = self._cachedPreference(PROXY_PORT, 3128)
+        return int(pref.value)
+
+    def setProxyPort(self, port):
+        if port is None:
+            pref = self._cachedPreference(PROXY_PORT, addIfMissing=False)
+            if pref is not None:
+                self.session.delete(pref)
+                del(self.cache[PROXY_PORT])
+        else:
+            pref = self._cachedPreference(PROXY_PORT)
+            pref.value = str(port)
+
+    def isProxyConfigured(self):
+        pref = self._cachedPreference(PROXY_HOST, addIfMissing=False)
+        return pref is not None
+
+    def daysToKeepFeedEntries(self):
+        pref = self._cachedPreference(DAYS_TO_KEEP_FEED_ENTRIES, 90, addIfMissing=True)
+        return int(pref.value)
+
+    def setDaysToKeepFeedEntries(self, dayString):
+        pref = self._cachedPreference(DAYS_TO_KEEP_FEED_ENTRIES)
+        pref.value = dayString