commands: Change the way the redact command parses it's arguments.

This fixes #104.

tests/buffer_test.py

@@ -3,6 +3,7 @@
 from __future__ import unicode_literals
 
 from matrix.buffer import WeechatChannelBuffer
+from matrix.utils import parse_redact_args
 
 
 class TestClass(object):
@@ -14,3 +15,54 @@ class TestClass(object):
         b = WeechatChannelBuffer("test_buffer_name", "example.org", "alice")
         b.message("alice", "hello world", 0, 0)
         assert b
+
+    def test_redact_args_parse(self):
+        args = '$81wbnOYZllVZJcstsnXpq7dmugA775-JT4IB-uPT680|"Hello world" No specific reason'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$81wbnOYZllVZJcstsnXpq7dmugA775-JT4IB-uPT680'
+        assert reason == 'No specific reason'
+
+        args = '$15677776791893pZSXx:example.org|"Hello world" No reason at all'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$15677776791893pZSXx:example.org'
+        assert reason == 'No reason at all'
+
+        args = '$15677776791893pZSXx:example.org No reason at all'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$15677776791893pZSXx:example.org'
+        assert reason == 'No reason at all'
+
+        args = '$81wbnOYZllVZJcstsnXpq7dmugA775-JT4IB-uPT680 No specific reason'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$81wbnOYZllVZJcstsnXpq7dmugA775-JT4IB-uPT680'
+        assert reason == 'No specific reason'
+
+        args = '$81wbnOYZllVZJcstsnXpq7dmugA775-JT4IB-uPT680'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$81wbnOYZllVZJcstsnXpq7dmugA775-JT4IB-uPT680'
+        assert reason == None
+
+        args = '$15677776791893pZSXx:example.org'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$15677776791893pZSXx:example.org'
+        assert reason == None
+
+        args = '   '
+        event_id, reason = parse_redact_args(args)
+        assert event_id == ''
+        assert reason == None
+
+        args = '$15677776791893pZSXx:example.org|"Hello world"'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$15677776791893pZSXx:example.org'
+        assert reason == None
+
+        args = '$15677776791893pZSXx:example.org|"Hello world'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$15677776791893pZSXx:example.org'
+        assert reason == None
+
+        args = '$15677776791893pZSXx:example.org "Hello world"'
+        event_id, reason = parse_redact_args(args)
+        assert event_id == '$15677776791893pZSXx:example.org'
+        assert reason == '"Hello world"'