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callbacks: add comments to findCallbacksForArgs.

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This commit is contained in:
Valentin Lorentz 2020-08-29 16:29:40 +02:00
parent f253da049d
commit fe84bfbbb6
1 changed files with 9 additions and 1 deletions
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10
src/callbacks.py
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@ -775,14 +775,18 @@ class NestedCommandsIrcProxy(ReplyIrcProxy):
(a list of strings) and the plugins for which it was a command.""" (a list of strings) and the plugins for which it was a command."""
assert isinstance(args, list) assert isinstance(args, list)
args = list(map(canonicalName, args)) args = list(map(canonicalName, args))
# Find a list maxL such that maxL = args[0:n] for the largest n
# possible such that maxL is a command.
cbs = [] cbs = []
maxL = [] maxL = []
for cb in self.irc.callbacks: for cb in self.irc.callbacks:
if not hasattr(cb, 'getCommand'): if not hasattr(cb, 'getCommand'):
continue continue
L = cb.getCommand(args) L = cb.getCommand(args)
#log.debug('%s.getCommand(%r) returned %r', cb.name(), args, L)
if L and L >= maxL: if L and L >= maxL:
# equivalent to "L and len(L) >= len(maxL)", because L and maxL
# are both "prefixes" of the same list.
maxL = L maxL = L
cbs.append((cb, L)) cbs.append((cb, L))
assert isinstance(L, list), \ assert isinstance(L, list), \
@ -791,7 +795,11 @@ class NestedCommandsIrcProxy(ReplyIrcProxy):
'getCommand must return a prefix of the args given. ' \ 'getCommand must return a prefix of the args given. ' \
'(args given: %r, returned: %r)' % (args, L) '(args given: %r, returned: %r)' % (args, L)
log.debug('findCallbacksForArgs: %r', cbs) log.debug('findCallbacksForArgs: %r', cbs)
# Filter out all the entries in cbs that are smaller than maxL (ie.
# maxL contains them, with more items at the end.)
cbs = [cb for (cb, L) in cbs if L == maxL] cbs = [cb for (cb, L) in cbs if L == maxL]
if len(maxL) == 1: if len(maxL) == 1:
# Special case: one arg determines the callback. In this case, we # Special case: one arg determines the callback. In this case, we
# have to check, in order: # have to check, in order: