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remember.py
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remember.py
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"""
remember.py: written by Scaevolus 2010
"""
import re
import string
import unittest
from util import hook
def db_init(db):
db.execute(
"create table if not exists memory(chan, word, data, nick,"
" primary key(chan, word))"
)
db.commit()
def get_memory(db, chan, word):
row = db.execute(
"select data from memory where chan=? and word=lower(?)", (chan, word)
).fetchone()
if row:
return row[0]
else:
return None
@hook.command
@hook.command("r")
def remember(inp, nick="", chan="", db=None):
".remember <word> [+]<data> s/<before>/<after> -- maps word to data in the memory, or "
" does a string replacement (not regex)"
db_init(db)
append = False
replacement = False
try:
head, tail = inp.split(None, 1)
except ValueError:
return remember.__doc__
data = get_memory(db, chan, head)
if data is not None:
_head, _tail = data.split(None, 1)
else:
_head, _tail = head, ""
if tail[0] == "+":
append = True
# ignore + symbol
new = tail[1:]
# data is stored with the input so ignore it when re-adding it
if len(tail) > 1 and tail[1] in (string.punctuation + " "):
tail = _tail + new
else:
tail = _tail + " " + new
if len(tail) > 2 and tail[0] == "s" and tail[1] in string.punctuation:
if _tail == "":
return "I don't know about that."
args = tail.split(tail[1])
if len(args) == 4 and args[3] == "":
args = args[:-1]
if len(args) == 3:
replacement = True
_, src, dst = args
new_data = _tail.replace(src, dst, 1)
if new_data == _tail:
return "replacement left data unchanged"
tail = new_data
else:
return "invalid replacement syntax -- try s$foo$bar instead?"
db.execute(
"replace into memory(chan, word, data, nick) values" " (?,lower(?),?,?)",
(chan, head, head + " " + tail, nick),
)
db.commit()
if data:
if append:
return "appending %s to %s" % (new, data.replace('"', "''"))
elif replacement:
return "replacing '%s' with '%s' in %s" % (src, dst, _tail)
else:
return 'forgetting "%s", remembering this instead.' % data.replace(
'"', "''"
)
else:
return "done."
@hook.command
@hook.command("f")
def forget(inp, chan="", db=None):
".forget <word> -- forgets the mapping that word had"
db_init(db)
data = get_memory(db, chan, inp)
if data:
db.execute("delete from memory where chan=? and word=lower(?)", (chan, inp))
db.commit()
return "forgot `%s`" % data.replace("`", "'")
else:
return "I don't know about that."
def get_page(data, start_idx, min_page_len, max_page_len):
"""
slices the data string, starting at start_idx, into a chunk no longer
than max_page_len. The slice will occur at a comma if the resulting
string would not be shorter than min_page_len.
returns a tuple of (result str, slice index)
"""
page_data = data[start_idx : start_idx + max_page_len]
if len(page_data) < max_page_len:
return page_data, len(page_data) + start_idx
last_comma_idx = page_data.rfind(",")
if last_comma_idx < min_page_len:
ret = data[start_idx : max_page_len + start_idx]
return ret, len(ret) + start_idx
end_idx = last_comma_idx + start_idx
return data[start_idx:end_idx], end_idx
def get_pages(data, min_page_len, max_page_len):
"slices the data string into pages using get_page, returning a list"
result = []
page_data, last_idx = get_page(data, 0, min_page_len, max_page_len)
while page_data:
result.append(page_data)
page_data, last_idx = get_page(data, last_idx, min_page_len, max_page_len)
return result
more_pages_message = " (%s page(s) left)"
page_missing_message = "%s only has %s page(s)"
message_len_limit = (
512 - len(more_pages_message) - 75
) # fudge factor for protocol overhead
@hook.regex(r"^\? ?(\S+) ?(\d+)?")
def question(inp, chan="", say=None, db=None):
"?<word> [page] -- shows what data is associated with word, paginated by page (default 1)"
db_init(db)
min_page_len = 100
word = inp.group(1).strip()
page = int(inp.group(2) or 1)
if page is None:
page = 1
data = get_memory(db, chan, word)
if data:
pages = get_pages(data, min_page_len, message_len_limit)
page_idx = page - 1 # 1-indexed
try:
page_data = pages[page_idx]
except IndexError:
say(page_missing_message % (word, len(pages)))
return
page_data = page_data.lstrip(", ")
last_page = len(pages) - 1
if page_idx == last_page:
say(page_data)
return
pages_left = last_page - page_idx
say(page_data + (more_pages_message % int(pages_left)))
class MemoryTest(unittest.TestCase):
def setUp(self):
import sqlite3
self.db = sqlite3.connect(":memory:")
def remember(self, inp, nick="someone", chan="#test"):
return remember(inp, nick=nick, chan=chan, db=self.db)
def forget(self, inp, chan="#test"):
return forget(inp, chan=chan, db=self.db)
def question(self, inp, chan="#test"):
output = []
question(
re.match(r"(\S+) ?(\d+)?", inp), chan=chan, say=output.append, db=self.db
)
return output[0] if output else None
def test_remember(self):
assert "done." == self.remember("dogs :3")
assert "dogs :3" == self.question("dogs")
def test_remember_doc(self):
assert ".remember <word>" in self.remember("bad_syntax")
def test_remember_overwrite(self):
self.remember("dogs :(")
assert 'forgetting "dogs :("' in self.remember("dogs :3")
assert "dogs :3" == self.question("dogs")
def test_remember_hygiene(self):
self.remember("python good", chan="#python")
self.remember("python bad", chan="#ruby")
assert "python good" == self.question("python", "#python")
assert "python bad" == self.question("python", "#ruby")
def test_remember_append(self):
self.remember("ball big")
self.remember("ball +red")
assert "ball big red" == self.question("ball")
def test_remember_append_punctuation(self):
self.remember("baby young")
self.remember("baby +, hungry")
assert "baby young, hungry" == self.question("baby")
def test_remember_replace(self):
self.remember("person is very rich (rich!)")
self.remember("person s/rich/poor/")
assert "person is very poor (rich!)" == self.question("person")
def test_remember_replace_invalid(self):
self.remember("fact bar")
assert "invalid replacement" in self.remember("fact s/too/many/seps/!")
assert "invalid replacement" in self.remember("fact s/toofew")
def test_remember_replace_ineffective(self):
self.remember("hay stack")
assert "unchanged" in self.remember("hay s:needle:shiny needle")
def test_remember_replace_missing(self):
assert "I don't know about that" in self.remember("hay s/what/lol")
def test_question_empty(self):
assert self.question("not_in_db") is None
def test_forget(self):
self.remember("meat good", chan="#carnivore")
self.remember("meat bad", chan="#vegan")
assert "forgot `meat good`" in self.forget("meat", chan="#carnivore")
assert "meat bad" == self.question("meat", chan="#vegan")
def test_forget_missing(self):
assert "don't know" in self.forget("fakekey")
def test_get_page(self):
assert get_page("123456789", 0, 5, 8) == ("12345678", 8) # max length
assert get_page("123,456789", 0, 5, 8) == (
"123,4567",
8,
) # min length not satisfied
assert get_page("123,45,67,89", 0, 5, 8) == (
"123,45",
6,
) # chooses correct comma
assert get_page("", 0, 5, 8) == ("", 0) # correct empty result
# start offsets
assert get_page("123456789", 1, 5, 9) == ("23456789", 9)
assert get_page("123456789", 1, 5, 8) == ("23456789", 9)
assert get_page("1234567,89", 1, 5, 8) == ("234567", 7)
assert get_page("", 1, 5, 8) == ("", 1)
def test_get_pages(self):
assert get_pages("123456789", 5, 8) == ["12345678", "9"]
assert get_pages("123,456789", 5, 8) == ["123,4567", "89"]
assert get_pages("123,45,67,89", 5, 8) == ["123,45", ",67,89"]
assert get_pages("", 5, 8) == []
def test_paging_message(self):
long_string = "long " + "a" * 1000
self.remember(long_string, chan="#long")
assert more_pages_message % 2 in self.question(
"long", chan="#long"
) # "2 pages left"
assert more_pages_message % 1 in self.question("long 2", chan="#long")
assert not re.match(r"\d", self.question("long 3", chan="#long"))
def test_paging_result(self):
long_string = "long " + "x" * message_len_limit + "y" * message_len_limit
self.remember(long_string, chan="#long")
p1_data = self.question("long", chan="#long")
p2_data = self.question("long 2", chan="#long")
p3_data = self.question("long 3", chan="#long")
all_data = p1_data + p2_data + p3_data
# no data lost
assert all_data.count("x") == message_len_limit
assert all_data.count("y") == message_len_limit
def test_missing_page(self):
long_string = "long " + "a" * 1000
self.remember("long " + long_string)
self.remember("thing foo")
assert page_missing_message % ("thing", 1) in self.question("thing 2")
assert page_missing_message % ("long", 3) in self.question("long 11")
def test_strip_leading_comma(self):
long_string = (
"long "
+ "x" * (message_len_limit - 10)
+ ", "
+ "y" * (message_len_limit - 10)
)
self.remember(long_string)
assert ", " not in self.question("long 2")
def test_regressions(self):
# improper split on last comma even though full message is < length limit
gmg = "gmg good morning goons, goodly morning goons, gob morning goons, good moring Gobiner, good morning gobs, goom morgan goobs"
self.remember(gmg)
assert self.question(gmg) == gmg
if __name__ == "__main__":
unittest.main()