paul@213 | 1 | #!/usr/bin/env python |
paul@213 | 2 | |
paul@213 | 3 | """ |
paul@213 | 4 | Interpretation of vCalendar content. |
paul@213 | 5 | |
paul@213 | 6 | Copyright (C) 2014, 2015 Paul Boddie <paul@boddie.org.uk> |
paul@213 | 7 | |
paul@213 | 8 | This program is free software; you can redistribute it and/or modify it under |
paul@213 | 9 | the terms of the GNU General Public License as published by the Free Software |
paul@213 | 10 | Foundation; either version 3 of the License, or (at your option) any later |
paul@213 | 11 | version. |
paul@213 | 12 | |
paul@213 | 13 | This program is distributed in the hope that it will be useful, but WITHOUT |
paul@213 | 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
paul@213 | 15 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
paul@213 | 16 | details. |
paul@213 | 17 | |
paul@213 | 18 | You should have received a copy of the GNU General Public License along with |
paul@213 | 19 | this program. If not, see <http://www.gnu.org/licenses/>. |
paul@213 | 20 | """ |
paul@213 | 21 | |
paul@256 | 22 | from datetime import datetime, timedelta |
paul@213 | 23 | from email.mime.text import MIMEText |
paul@392 | 24 | from imiptools.dates import format_datetime, get_datetime, get_duration, \ |
paul@392 | 25 | get_freebusy_period, get_period, to_timezone, \ |
paul@392 | 26 | to_utc_datetime |
paul@327 | 27 | from imiptools.period import period_overlaps |
paul@316 | 28 | from pytz import timezone |
paul@213 | 29 | from vCalendar import iterwrite, parse, ParseError, to_dict, to_node |
paul@256 | 30 | from vRecurrence import get_parameters, get_rule |
paul@213 | 31 | import email.utils |
paul@213 | 32 | |
paul@213 | 33 | try: |
paul@213 | 34 | from cStringIO import StringIO |
paul@213 | 35 | except ImportError: |
paul@213 | 36 | from StringIO import StringIO |
paul@213 | 37 | |
paul@213 | 38 | class Object: |
paul@213 | 39 | |
paul@213 | 40 | "Access to calendar structures." |
paul@213 | 41 | |
paul@213 | 42 | def __init__(self, fragment): |
paul@213 | 43 | self.objtype, (self.details, self.attr) = fragment.items()[0] |
paul@213 | 44 | |
paul@213 | 45 | def get_items(self, name, all=True): |
paul@213 | 46 | return get_items(self.details, name, all) |
paul@213 | 47 | |
paul@213 | 48 | def get_item(self, name): |
paul@213 | 49 | return get_item(self.details, name) |
paul@213 | 50 | |
paul@213 | 51 | def get_value_map(self, name): |
paul@213 | 52 | return get_value_map(self.details, name) |
paul@213 | 53 | |
paul@213 | 54 | def get_values(self, name, all=True): |
paul@213 | 55 | return get_values(self.details, name, all) |
paul@213 | 56 | |
paul@213 | 57 | def get_value(self, name): |
paul@213 | 58 | return get_value(self.details, name) |
paul@213 | 59 | |
paul@213 | 60 | def get_utc_datetime(self, name): |
paul@213 | 61 | return get_utc_datetime(self.details, name) |
paul@213 | 62 | |
paul@417 | 63 | def get_date_values(self, name, tzid=None): |
paul@417 | 64 | items = get_date_value_items(self.details, name, tzid) |
paul@389 | 65 | return items and [value for value, attr in items] |
paul@352 | 66 | |
paul@417 | 67 | def get_date_value_items(self, name, tzid=None): |
paul@417 | 68 | return get_date_value_items(self.details, name, tzid) |
paul@352 | 69 | |
paul@318 | 70 | def get_datetime(self, name): |
paul@318 | 71 | dt, attr = get_datetime_item(self.details, name) |
paul@318 | 72 | return dt |
paul@318 | 73 | |
paul@289 | 74 | def get_datetime_item(self, name): |
paul@289 | 75 | return get_datetime_item(self.details, name) |
paul@289 | 76 | |
paul@392 | 77 | def get_duration(self, name): |
paul@392 | 78 | return get_duration(self.get_value(name)) |
paul@392 | 79 | |
paul@213 | 80 | def to_node(self): |
paul@213 | 81 | return to_node({self.objtype : [(self.details, self.attr)]}) |
paul@213 | 82 | |
paul@213 | 83 | def to_part(self, method): |
paul@213 | 84 | return to_part(method, [self.to_node()]) |
paul@213 | 85 | |
paul@213 | 86 | # Direct access to the structure. |
paul@213 | 87 | |
paul@392 | 88 | def has_key(self, name): |
paul@392 | 89 | return self.details.has_key(name) |
paul@392 | 90 | |
paul@213 | 91 | def __getitem__(self, name): |
paul@213 | 92 | return self.details[name] |
paul@213 | 93 | |
paul@213 | 94 | def __setitem__(self, name, value): |
paul@213 | 95 | self.details[name] = value |
paul@213 | 96 | |
paul@213 | 97 | def __delitem__(self, name): |
paul@213 | 98 | del self.details[name] |
paul@213 | 99 | |
paul@256 | 100 | # Computed results. |
paul@256 | 101 | |
paul@360 | 102 | def has_recurrence(self, tzid, recurrence): |
paul@360 | 103 | recurrences = [start for start, end in get_periods(self, tzid, recurrence, True)] |
paul@360 | 104 | return recurrence in recurrences |
paul@256 | 105 | |
paul@360 | 106 | def get_periods(self, tzid, end): |
paul@360 | 107 | return get_periods(self, tzid, end) |
paul@360 | 108 | |
paul@360 | 109 | def get_periods_for_freebusy(self, tzid, end): |
paul@360 | 110 | periods = self.get_periods(tzid, end) |
paul@291 | 111 | return get_periods_for_freebusy(self, periods, tzid) |
paul@291 | 112 | |
paul@422 | 113 | def get_tzid(self): |
paul@422 | 114 | dtstart, dtstart_attr = self.get_datetime_item("DTSTART") |
paul@422 | 115 | dtend, dtend_attr = self.get_datetime_item("DTEND") |
paul@422 | 116 | return get_tzid(dtstart_attr, dtend_attr) |
paul@422 | 117 | |
paul@213 | 118 | # Construction and serialisation. |
paul@213 | 119 | |
paul@213 | 120 | def make_calendar(nodes, method=None): |
paul@213 | 121 | |
paul@213 | 122 | """ |
paul@213 | 123 | Return a complete calendar node wrapping the given 'nodes' and employing the |
paul@213 | 124 | given 'method', if indicated. |
paul@213 | 125 | """ |
paul@213 | 126 | |
paul@213 | 127 | return ("VCALENDAR", {}, |
paul@213 | 128 | (method and [("METHOD", {}, method)] or []) + |
paul@213 | 129 | [("VERSION", {}, "2.0")] + |
paul@213 | 130 | nodes |
paul@213 | 131 | ) |
paul@213 | 132 | |
paul@327 | 133 | def make_freebusy(freebusy, uid, organiser, organiser_attr=None, attendee=None, |
paul@327 | 134 | attendee_attr=None, dtstart=None, dtend=None): |
paul@222 | 135 | |
paul@222 | 136 | """ |
paul@222 | 137 | Return a calendar node defining the free/busy details described in the given |
paul@292 | 138 | 'freebusy' list, employing the given 'uid', for the given 'organiser' and |
paul@292 | 139 | optional 'organiser_attr', with the optional 'attendee' providing recipient |
paul@292 | 140 | details together with the optional 'attendee_attr'. |
paul@327 | 141 | |
paul@327 | 142 | The result will be constrained to the 'dtstart' and 'dtend' period if these |
paul@327 | 143 | parameters are given. |
paul@222 | 144 | """ |
paul@222 | 145 | |
paul@222 | 146 | record = [] |
paul@222 | 147 | rwrite = record.append |
paul@222 | 148 | |
paul@292 | 149 | rwrite(("ORGANIZER", organiser_attr or {}, organiser)) |
paul@222 | 150 | |
paul@222 | 151 | if attendee: |
paul@292 | 152 | rwrite(("ATTENDEE", attendee_attr or {}, attendee)) |
paul@222 | 153 | |
paul@222 | 154 | rwrite(("UID", {}, uid)) |
paul@222 | 155 | |
paul@222 | 156 | if freebusy: |
paul@327 | 157 | |
paul@327 | 158 | # Get a constrained view if start and end limits are specified. |
paul@327 | 159 | |
paul@327 | 160 | periods = dtstart and dtend and period_overlaps(freebusy, (dtstart, dtend), True) or freebusy |
paul@327 | 161 | |
paul@327 | 162 | # Write the limits of the resource. |
paul@327 | 163 | |
paul@327 | 164 | rwrite(("DTSTART", {"VALUE" : "DATE-TIME"}, periods[0][0])) |
paul@327 | 165 | rwrite(("DTEND", {"VALUE" : "DATE-TIME"}, periods[-1][1])) |
paul@327 | 166 | |
paul@395 | 167 | for start, end, uid, transp, recurrenceid, summary, organiser in periods: |
paul@222 | 168 | if transp == "OPAQUE": |
paul@222 | 169 | rwrite(("FREEBUSY", {"FBTYPE" : "BUSY"}, "/".join([start, end]))) |
paul@222 | 170 | |
paul@222 | 171 | return ("VFREEBUSY", {}, record) |
paul@222 | 172 | |
paul@213 | 173 | def parse_object(f, encoding, objtype=None): |
paul@213 | 174 | |
paul@213 | 175 | """ |
paul@213 | 176 | Parse the iTIP content from 'f' having the given 'encoding'. If 'objtype' is |
paul@213 | 177 | given, only objects of that type will be returned. Otherwise, the root of |
paul@213 | 178 | the content will be returned as a dictionary with a single key indicating |
paul@213 | 179 | the object type. |
paul@213 | 180 | |
paul@213 | 181 | Return None if the content was not readable or suitable. |
paul@213 | 182 | """ |
paul@213 | 183 | |
paul@213 | 184 | try: |
paul@213 | 185 | try: |
paul@213 | 186 | doctype, attrs, elements = obj = parse(f, encoding=encoding) |
paul@213 | 187 | if objtype and doctype == objtype: |
paul@213 | 188 | return to_dict(obj)[objtype][0] |
paul@213 | 189 | elif not objtype: |
paul@213 | 190 | return to_dict(obj) |
paul@213 | 191 | finally: |
paul@213 | 192 | f.close() |
paul@213 | 193 | |
paul@213 | 194 | # NOTE: Handle parse errors properly. |
paul@213 | 195 | |
paul@213 | 196 | except (ParseError, ValueError): |
paul@213 | 197 | pass |
paul@213 | 198 | |
paul@213 | 199 | return None |
paul@213 | 200 | |
paul@213 | 201 | def to_part(method, calendar): |
paul@213 | 202 | |
paul@213 | 203 | """ |
paul@213 | 204 | Write using the given 'method', the 'calendar' details to a MIME |
paul@213 | 205 | text/calendar part. |
paul@213 | 206 | """ |
paul@213 | 207 | |
paul@213 | 208 | encoding = "utf-8" |
paul@213 | 209 | out = StringIO() |
paul@213 | 210 | try: |
paul@213 | 211 | to_stream(out, make_calendar(calendar, method), encoding) |
paul@213 | 212 | part = MIMEText(out.getvalue(), "calendar", encoding) |
paul@213 | 213 | part.set_param("method", method) |
paul@213 | 214 | return part |
paul@213 | 215 | |
paul@213 | 216 | finally: |
paul@213 | 217 | out.close() |
paul@213 | 218 | |
paul@213 | 219 | def to_stream(out, fragment, encoding="utf-8"): |
paul@213 | 220 | iterwrite(out, encoding=encoding).append(fragment) |
paul@213 | 221 | |
paul@213 | 222 | # Structure access functions. |
paul@213 | 223 | |
paul@213 | 224 | def get_items(d, name, all=True): |
paul@213 | 225 | |
paul@213 | 226 | """ |
paul@213 | 227 | Get all items from 'd' for the given 'name', returning single items if |
paul@213 | 228 | 'all' is specified and set to a false value and if only one value is |
paul@213 | 229 | present for the name. Return None if no items are found for the name or if |
paul@213 | 230 | many items are found but 'all' is set to a false value. |
paul@213 | 231 | """ |
paul@213 | 232 | |
paul@213 | 233 | if d.has_key(name): |
paul@213 | 234 | values = d[name] |
paul@213 | 235 | if all: |
paul@213 | 236 | return values |
paul@213 | 237 | elif len(values) == 1: |
paul@213 | 238 | return values[0] |
paul@213 | 239 | else: |
paul@213 | 240 | return None |
paul@213 | 241 | else: |
paul@213 | 242 | return None |
paul@213 | 243 | |
paul@213 | 244 | def get_item(d, name): |
paul@213 | 245 | return get_items(d, name, False) |
paul@213 | 246 | |
paul@213 | 247 | def get_value_map(d, name): |
paul@213 | 248 | |
paul@213 | 249 | """ |
paul@213 | 250 | Return a dictionary for all items in 'd' having the given 'name'. The |
paul@213 | 251 | dictionary will map values for the name to any attributes or qualifiers |
paul@213 | 252 | that may have been present. |
paul@213 | 253 | """ |
paul@213 | 254 | |
paul@213 | 255 | items = get_items(d, name) |
paul@213 | 256 | if items: |
paul@213 | 257 | return dict(items) |
paul@213 | 258 | else: |
paul@213 | 259 | return {} |
paul@213 | 260 | |
paul@213 | 261 | def get_values(d, name, all=True): |
paul@213 | 262 | if d.has_key(name): |
paul@213 | 263 | values = d[name] |
paul@213 | 264 | if not all and len(values) == 1: |
paul@213 | 265 | return values[0][0] |
paul@213 | 266 | else: |
paul@213 | 267 | return map(lambda x: x[0], values) |
paul@213 | 268 | else: |
paul@213 | 269 | return None |
paul@213 | 270 | |
paul@213 | 271 | def get_value(d, name): |
paul@213 | 272 | return get_values(d, name, False) |
paul@213 | 273 | |
paul@417 | 274 | def get_date_value_items(d, name, tzid=None): |
paul@352 | 275 | |
paul@352 | 276 | """ |
paul@389 | 277 | Obtain items from 'd' having the given 'name', where a single item yields |
paul@389 | 278 | potentially many values. Return a list of tuples of the form (value, |
paul@389 | 279 | attributes) where the attributes have been given for the property in 'd'. |
paul@352 | 280 | """ |
paul@352 | 281 | |
paul@403 | 282 | items = get_items(d, name) |
paul@403 | 283 | if items: |
paul@403 | 284 | all_items = [] |
paul@403 | 285 | for item in items: |
paul@403 | 286 | values, attr = item |
paul@417 | 287 | if not attr.has_key("TZID") and tzid: |
paul@417 | 288 | attr["TZID"] = tzid |
paul@403 | 289 | if not isinstance(values, list): |
paul@403 | 290 | values = [values] |
paul@403 | 291 | for value in values: |
paul@403 | 292 | all_items.append((get_datetime(value, attr) or get_period(value, attr), attr)) |
paul@403 | 293 | return all_items |
paul@352 | 294 | else: |
paul@352 | 295 | return None |
paul@352 | 296 | |
paul@213 | 297 | def get_utc_datetime(d, name): |
paul@348 | 298 | t = get_datetime_item(d, name) |
paul@348 | 299 | if not t: |
paul@348 | 300 | return None |
paul@348 | 301 | else: |
paul@348 | 302 | dt, attr = t |
paul@348 | 303 | return to_utc_datetime(dt) |
paul@289 | 304 | |
paul@289 | 305 | def get_datetime_item(d, name): |
paul@348 | 306 | t = get_item(d, name) |
paul@348 | 307 | if not t: |
paul@348 | 308 | return None |
paul@348 | 309 | else: |
paul@348 | 310 | value, attr = t |
paul@348 | 311 | return get_datetime(value, attr), attr |
paul@213 | 312 | |
paul@213 | 313 | def get_addresses(values): |
paul@213 | 314 | return [address for name, address in email.utils.getaddresses(values)] |
paul@213 | 315 | |
paul@213 | 316 | def get_address(value): |
paul@333 | 317 | value = value.lower() |
paul@333 | 318 | return value.startswith("mailto:") and value[7:] or value |
paul@213 | 319 | |
paul@213 | 320 | def get_uri(value): |
paul@213 | 321 | return value.lower().startswith("mailto:") and value.lower() or ":" in value and value or "mailto:%s" % value.lower() |
paul@213 | 322 | |
paul@309 | 323 | uri_value = get_uri |
paul@309 | 324 | |
paul@309 | 325 | def uri_values(values): |
paul@309 | 326 | return map(get_uri, values) |
paul@309 | 327 | |
paul@213 | 328 | def uri_dict(d): |
paul@213 | 329 | return dict([(get_uri(key), value) for key, value in d.items()]) |
paul@213 | 330 | |
paul@213 | 331 | def uri_item(item): |
paul@213 | 332 | return get_uri(item[0]), item[1] |
paul@213 | 333 | |
paul@213 | 334 | def uri_items(items): |
paul@213 | 335 | return [(get_uri(value), attr) for value, attr in items] |
paul@213 | 336 | |
paul@220 | 337 | # Operations on structure data. |
paul@220 | 338 | |
paul@220 | 339 | def is_new_object(old_sequence, new_sequence, old_dtstamp, new_dtstamp, partstat_set): |
paul@220 | 340 | |
paul@220 | 341 | """ |
paul@220 | 342 | Return for the given 'old_sequence' and 'new_sequence', 'old_dtstamp' and |
paul@220 | 343 | 'new_dtstamp', and the 'partstat_set' indication, whether the object |
paul@220 | 344 | providing the new information is really newer than the object providing the |
paul@220 | 345 | old information. |
paul@220 | 346 | """ |
paul@220 | 347 | |
paul@220 | 348 | have_sequence = old_sequence is not None and new_sequence is not None |
paul@220 | 349 | is_same_sequence = have_sequence and int(new_sequence) == int(old_sequence) |
paul@220 | 350 | |
paul@220 | 351 | have_dtstamp = old_dtstamp and new_dtstamp |
paul@220 | 352 | is_old_dtstamp = have_dtstamp and new_dtstamp < old_dtstamp or old_dtstamp and not new_dtstamp |
paul@220 | 353 | |
paul@220 | 354 | is_old_sequence = have_sequence and ( |
paul@220 | 355 | int(new_sequence) < int(old_sequence) or |
paul@220 | 356 | is_same_sequence and is_old_dtstamp |
paul@220 | 357 | ) |
paul@220 | 358 | |
paul@220 | 359 | return is_same_sequence and partstat_set or not is_old_sequence |
paul@220 | 360 | |
paul@256 | 361 | # NOTE: Need to expose the 100 day window for recurring events in the |
paul@256 | 362 | # NOTE: configuration. |
paul@256 | 363 | |
paul@360 | 364 | def get_window_end(tzid, window_size=100): |
paul@360 | 365 | return to_timezone(datetime.now(), tzid) + timedelta(window_size) |
paul@360 | 366 | |
paul@422 | 367 | def get_tzid(dtstart_attr, dtend_attr): |
paul@422 | 368 | return dtstart_attr.get("TZID") or dtend_attr.get("TZID") |
paul@422 | 369 | |
paul@360 | 370 | def get_periods(obj, tzid, window_end, inclusive=False): |
paul@256 | 371 | |
paul@256 | 372 | """ |
paul@256 | 373 | Return periods for the given object 'obj', confining materialised periods |
paul@360 | 374 | to before the given 'window_end' datetime. If 'inclusive' is set to a true |
paul@360 | 375 | value, any period occurring at the 'window_end' will be included. |
paul@256 | 376 | """ |
paul@256 | 377 | |
paul@318 | 378 | rrule = obj.get_value("RRULE") |
paul@318 | 379 | |
paul@318 | 380 | # Use localised datetimes. |
paul@318 | 381 | |
paul@392 | 382 | dtstart, dtstart_attr = obj.get_datetime_item("DTSTART") |
paul@256 | 383 | |
paul@392 | 384 | if obj.has_key("DTEND"): |
paul@392 | 385 | dtend, dtend_attr = obj.get_datetime_item("DTEND") |
paul@392 | 386 | duration = dtend - dtstart |
paul@392 | 387 | elif obj.has_key("DURATION"): |
paul@392 | 388 | duration = obj.get_duration("DURATION") |
paul@392 | 389 | dtend = dtstart + duration |
paul@392 | 390 | dtend_attr = dtstart_attr |
paul@392 | 391 | else: |
paul@392 | 392 | dtend, dtend_attr = dtstart, dtstart_attr |
paul@256 | 393 | |
paul@422 | 394 | tzid = get_tzid(dtstart_attr, dtend_attr) or tzid |
paul@256 | 395 | |
paul@352 | 396 | if not rrule: |
paul@352 | 397 | periods = [(dtstart, dtend)] |
paul@352 | 398 | else: |
paul@352 | 399 | # Recurrence rules create multiple instances to be checked. |
paul@352 | 400 | # Conflicts may only be assessed within a period defined by policy |
paul@352 | 401 | # for the agent, with instances outside that period being considered |
paul@352 | 402 | # unchecked. |
paul@352 | 403 | |
paul@352 | 404 | selector = get_rule(dtstart, rrule) |
paul@352 | 405 | parameters = get_parameters(rrule) |
paul@352 | 406 | periods = [] |
paul@352 | 407 | |
paul@360 | 408 | for start in selector.materialise(dtstart, window_end, parameters.get("COUNT"), parameters.get("BYSETPOS"), inclusive): |
paul@352 | 409 | start = to_timezone(datetime(*start), tzid) |
paul@352 | 410 | end = start + duration |
paul@352 | 411 | periods.append((start, end)) |
paul@352 | 412 | |
paul@352 | 413 | # Add recurrence dates. |
paul@256 | 414 | |
paul@352 | 415 | periods = set(periods) |
paul@417 | 416 | rdates = obj.get_date_values("RDATE", tzid) |
paul@352 | 417 | |
paul@352 | 418 | if rdates: |
paul@352 | 419 | for rdate in rdates: |
paul@389 | 420 | if isinstance(rdate, tuple): |
paul@389 | 421 | periods.add(rdate) |
paul@389 | 422 | else: |
paul@389 | 423 | periods.add((rdate, rdate + duration)) |
paul@352 | 424 | |
paul@352 | 425 | # Exclude exception dates. |
paul@352 | 426 | |
paul@417 | 427 | exdates = obj.get_date_values("EXDATE", tzid) |
paul@256 | 428 | |
paul@352 | 429 | if exdates: |
paul@352 | 430 | for exdate in exdates: |
paul@389 | 431 | if isinstance(exdate, tuple): |
paul@389 | 432 | period = exdate |
paul@389 | 433 | else: |
paul@389 | 434 | period = (exdate, exdate + duration) |
paul@352 | 435 | if period in periods: |
paul@352 | 436 | periods.remove(period) |
paul@256 | 437 | |
paul@352 | 438 | # Return a sorted list of the periods. |
paul@352 | 439 | |
paul@352 | 440 | periods = list(periods) |
paul@352 | 441 | periods.sort() |
paul@256 | 442 | return periods |
paul@256 | 443 | |
paul@291 | 444 | def get_periods_for_freebusy(obj, periods, tzid): |
paul@291 | 445 | |
paul@306 | 446 | """ |
paul@306 | 447 | Get free/busy-compliant periods employed by 'obj' from the given 'periods', |
paul@306 | 448 | using the indicated 'tzid' to convert dates to datetimes. |
paul@306 | 449 | """ |
paul@306 | 450 | |
paul@291 | 451 | start, start_attr = obj.get_datetime_item("DTSTART") |
paul@392 | 452 | if obj.has_key("DTEND"): |
paul@392 | 453 | end, end_attr = obj.get_datetime_item("DTEND") |
paul@392 | 454 | elif obj.has_key("DURATION"): |
paul@392 | 455 | duration = obj.get_duration("DURATION") |
paul@392 | 456 | end = start + duration |
paul@392 | 457 | else: |
paul@392 | 458 | end, end_attr = start, start_attr |
paul@291 | 459 | |
paul@422 | 460 | tzid = get_tzid(start_attr, end_attr) or tzid |
paul@291 | 461 | |
paul@291 | 462 | l = [] |
paul@291 | 463 | |
paul@291 | 464 | for start, end in periods: |
paul@291 | 465 | start, end = get_freebusy_period(start, end, tzid) |
paul@320 | 466 | start, end = [to_timezone(x, "UTC") for x in start, end] |
paul@291 | 467 | l.append((format_datetime(start), format_datetime(end))) |
paul@291 | 468 | |
paul@291 | 469 | return l |
paul@291 | 470 | |
paul@213 | 471 | # vim: tabstop=4 expandtab shiftwidth=4 |