def translate(string, lang_direction):
"""Takes a string that is to be translated and returns the translated string, doesn't translate the %(format)s parts, they must remain the same text as the msgid"""
# simple format chars like %s can be 'translated' ok, they just pass through unaffected
named_format_regex = re.compile(r"%\([^\)]+?\)[sd]", re.VERBOSE)
matches = named_format_regex.findall(string)
new = None
if len(matches) == 0:
# There are no format specifiers in this string, so just do a straight translation
# this fails if we've missed a format specifier
assert "%(" not in string, string
new = translate_subpart(string, lang_direction)
else:
# we need to do complicate translation of the bits inside
full_trans = translate_subpart(string, lang_direction)
for match in matches:
# then, for each format specifier, replace back in the string
translated_match = translate_subpart(match, lang_direction)
# during the translation some extra punctuation/spaces might have been added
# remove them
translated_match_match = named_format_regex.search(translated_match)
assert translated_match_match
translated_match = translated_match_match.group(0)
# put back the format specifier, the case of the format specifier might have changed
replace = re.compile(re.escape(translated_match), re.IGNORECASE)
full_trans = replace.sub(match, full_trans)
new = full_trans
return new
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