Don't emit regular sleeping announcements in Basic UI

They are too noisy in the Basic UI, but are still included in TTYUI.
Reported by John Wiegley.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

Changelog.draft.rst

@@ -31,5 +31,6 @@ Changes
 
 * Don't fail when ~/netrc is not readable by us.
 
+* Don't emit noisy regular sleeping announcements in Basic UI.
 Bug Fixes
 ---------

offlineimap/ui/TTY.py

@@ -84,3 +84,19 @@ class TTYUI(UIBase):
         else:
             UIBase.mainException(self)
 
+    def sleeping(self, sleepsecs, remainingsecs):
+        """Sleep for sleepsecs, display remainingsecs to go.
+
+        Does nothing if sleepsecs <= 0.
+        Display a message on the screen if we pass a full minute.
+
+        This implementation in UIBase does not support this, but some
+        implementations return 0 for successful sleep and 1 for an
+        'abort', ie a request to sync immediately.
+        """
+        if sleepsecs > 0:
+            if remainingsecs//60 != (remainingsecs-sleepsecs)//60:
+                self.logger.info("Next refresh in %.1f minutes" % (
+                        remainingsecs/60.0))
+            time.sleep(sleepsecs)
+        return 0

offlineimap/ui/UIBase.py

@@ -493,7 +493,7 @@ class UIBase(object):
         """
         if sleepsecs > 0:
             if remainingsecs//60 != (remainingsecs-sleepsecs)//60:
-                self.logger.info("Next refresh in %.1f minutes" % (
+                self.logger.debug("Next refresh in %.1f minutes" % (
                         remainingsecs/60.0))
             time.sleep(sleepsecs)
         return 0