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Irc: rework TS handling again

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(cherry picked from commit 0e535a916c)
This commit is contained in:
James Lu 2016-07-26 23:30:55 -07:00
parent 9233a94379
commit 4e3d209831
1 changed files with 17 additions and 27 deletions
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44
classes.py
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@ -1186,6 +1186,12 @@ class Protocol():
Merges modes of a channel given the remote TS and a list of modes.
"""
# Okay, so the situation is that we have 6 possible TS/sender combinations:
# | our TS lower | TS equal | their TS lower
# mode origin is us | OVERWRITE | MERGE | IGNORE
# mode origin is uplink | IGNORE | MERGE | OVERWRITE
def _clear():
log.debug("(%s) Clearing modes from channel %s due to TS change", self.irc.name,
channel)
@ -1208,41 +1214,25 @@ class Protocol():
# Check if we're the mode sender based on the UID / SID given.
our_mode = self.irc.isInternalClient(sender) or self.irc.isInternalServer(sender)
log.debug("(%s/%s) is the mode origin us? %s",
self.irc.name, channel, our_mode)
if their_ts < our_ts:
# Their TS is older than ours. We should clear our stored modes for the channel and
# apply the ones in the queue to be set. This is regardless of whether we're sending
# outgoing modes or receiving some - both are handled the same with a "received" TS,
# and comparing it with the one we have.
log.debug("(%s/%s) received TS of %s is lower than our %s; mode query %s",
self.irc.name, channel, their_ts, our_ts, modes)
log.debug("(%s/%s) our_ts: %s; their_ts: %s; is the mode origin us? %s", self.irc.name,
channel, our_ts, their_ts, our_mode)
# Update the channel TS to theirs regardless of whether the mode setting passes.
log.debug('(%s) Setting channel TS of %s to %s from %s',
self.irc.name, channel, their_ts, our_ts)
self.irc.channels[channel].ts = their_ts
_clear()
if not our_mode:
_apply()
elif their_ts == our_ts:
if their_ts == our_ts:
log.debug("(%s/%s) remote TS of %s is equal to our %s; mode query %s",
self.irc.name, channel, their_ts, our_ts, modes)
# Their TS is equal to ours. Merge modes.
_apply()
elif their_ts > our_ts:
log.debug("(%s/%s) remote TS of %s is higher than our %s; mode query %s",
self.irc.name, channel, their_ts, our_ts, modes)
# Their TS is younger than ours. Clear the state and replace the modes for the channel
# with the ones being set, if we're the one setting modes.
_clear()
elif ((their_ts < our_ts) and (not our_mode)) or ((our_ts < their_ts) and our_mode):
winning_ts = min(our_ts, their_ts)
log.debug('(%s) Resetting channel TS of %s from %s to %s',
self.irc.name, channel, self.irc.channels[channel].ts, winning_ts)
self.irc.channels[channel].ts = winning_ts
if our_mode:
_apply()
if not our_mode: # Skip clearing if we're the one setting the mode.
_clear()
_apply()
def _getSid(self, sname):
"""Returns the SID of a server with the given name, if present."""