"""Callback for /bufsave command."""

filename_raw = args

if not filename_raw:

w.command('', '/help %s' % SCRIPT_COMMAND)

return w.WEECHAT_RC_OK

options = {

'directory': 'data',

}

filename = w.string_eval_path_home(filename_raw, {}, {}, options)

if exists(filename):

w.prnt('', 'Error: target file already exists!')

return w.WEECHAT_RC_OK

try:

fp = open(filename, 'w')

except Exception:

w.prnt('', 'Error writing to target file!')

return w.WEECHAT_RC_OK

version = w.info_get('version_number', '') or 0

if int(version) >= 0x00030600:

# use hdata with WeeChat >= 0.3.6 (direct access to data, very fast)

own_lines = w.hdata_pointer(w.hdata_get('buffer'), buffer, 'own_lines')

if own_lines:

line = w.hdata_pointer(w.hdata_get('lines'),

own_lines, 'first_line')

hdata_line = w.hdata_get('line')

hdata_line_data = w.hdata_get('line_data')

while line:

data = w.hdata_pointer(hdata_line, line, 'data')

if data:

date = w.hdata_time(hdata_line_data, data, 'date')

# since WeeChat 0.3.9, hdata_time returns long instead of

# string

if not isinstance(date, str):

date = time.strftime('%F %T',

time.localtime(int(date)))

fp.write('%s %s %s\n' % (

date,

cstrip(w.hdata_string(hdata_line_data,

data, 'prefix')),

cstrip(w.hdata_string(hdata_line_data,

data, 'message')),

))

line = w.hdata_move(hdata_line, line, 1)

else:

# use infolist with WeeChat <= 0.3.5 (full duplication of lines,

# slow and uses memory)

infolist = w.infolist_get('buffer_lines', buffer, '')

while w.infolist_next(infolist):

fp.write('%s %s %s\n' % (

w.infolist_time(infolist, 'date'),

cstrip(w.infolist_string(infolist, 'prefix')),

cstrip(w.infolist_string(infolist, 'message')),

))

w.infolist_free(infolist)

fp.close()