summaryrefslogtreecommitdiff
path: root/poezio/common.py
blob: 85bbdffe29e3590a6f2d7a1327e6fc68447c30f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
# Copyright 2010-2011 Florent Le Coz <louiz@louiz.org>
#
# This file is part of Poezio.
#
# Poezio is free software: you can redistribute it and/or modify
# it under the terms of the zlib license. See the COPYING file.

"""
Various useful functions.
"""

from datetime import datetime, timedelta
from slixmpp import JID, InvalidJID
from poezio.poezio_shlex import shlex

import base64
import os
import mimetypes
import hashlib
import subprocess
import time
import string


def get_base64_from_file(path):
    """
    Convert the content of a file to base64

    :param str path: The path of the file to convert.
    :return: A tuple of (encoded data, mime type, sha1 hash) if
        the file exists and does not exceeds the upper size limit of 16384.
    :return: (None, None, error message) if it fails
    :rtype: :py:class:`tuple`

    """
    if not os.path.isfile(path):
        return (None, None, "File does not exist")
    size = os.path.getsize(path)
    if size > 16384:
        return (None, None, "File is too big")
    fdes = open(path, 'rb')
    data = fdes.read()
    encoded = base64.encodestring(data)
    sha1 = hashlib.sha1(data).hexdigest()
    mime_type = mimetypes.guess_type(path)[0]
    return (encoded, mime_type, sha1)

def _get_output_of_command(command):
    """
    Runs a command and returns its output.

    :param str command: The command to run.
    :return: The output or None
    :rtype: :py:class:`str`
    """
    try:
        return subprocess.check_output(command.split()).decode('utf-8').split('\n')
    except subprocess.CalledProcessError:
        return None

def _is_in_path(command, return_abs_path=False):
    """
    Check if *command* is in the $PATH or not.

    :param str command: The command to be checked.
    :param bool return_abs_path: Return the absolute path of the command instead
        of True if the command is found.
    :return: True if the command is found, the command path if the command is found
        and *return_abs_path* is True, otherwise False.

    """
    for directory in os.getenv('PATH').split(os.pathsep):
        try:
            if command in os.listdir(directory):
                if return_abs_path:
                    return os.path.join(directory, command)
                else:
                    return True
        except OSError:
            # If the user has non directories in his path
            pass
    return False

DISTRO_INFO = {
    'Arch Linux': '/etc/arch-release',
    'Aurox Linux': '/etc/aurox-release',
    'Conectiva Linux': '/etc/conectiva-release',
    'CRUX': '/usr/bin/crux',
    'Debian GNU/Linux': '/etc/debian_version',
    'Fedora Linux': '/etc/fedora-release',
    'Gentoo Linux': '/etc/gentoo-release',
    'Linux from Scratch': '/etc/lfs-release',
    'Mandrake Linux': '/etc/mandrake-release',
    'Slackware Linux': '/etc/slackware-version',
    'Solaris/Sparc': '/etc/release',
    'Source Mage': '/etc/sourcemage_version',
    'SUSE Linux': '/etc/SuSE-release',
    'Sun JDS': '/etc/sun-release',
    'PLD Linux': '/etc/pld-release',
    'Yellow Dog Linux': '/etc/yellowdog-release',
    # many distros use the /etc/redhat-release for compatibility
    # so Redhat is the last
    'Redhat Linux': '/etc/redhat-release'
}

def get_os_info():
    """
    Returns a detailed and well formated string containing
    informations about the operating system

    :rtype: str
    """
    if os.name == 'posix':
        executable = 'lsb_release'
        params = ' --description --codename --release --short'
        full_path_to_executable = _is_in_path(executable, return_abs_path=True)
        if full_path_to_executable:
            command = executable + params
            process = subprocess.Popen([command], shell=True,
                                       stdin=subprocess.PIPE,
                                       stdout=subprocess.PIPE,
                                       close_fds=True)
            process.wait()
            output = process.stdout.readline().decode('utf-8').strip()
            # some distros put n/a in places, so remove those
            output = output.replace('n/a', '').replace('N/A', '')
            return output

        # lsb_release executable not available, so parse files
        for distro_name in DISTRO_INFO:
            path_to_file = DISTRO_INFO[distro_name]
            if os.path.exists(path_to_file):
                if os.access(path_to_file, os.X_OK):
                    # the file is executable (f.e. CRUX)
                    # yes, then run it and get the first line of output.
                    text = _get_output_of_command(path_to_file)[0]
                else:
                    fdes = open(path_to_file, encoding='utf-8')
                    text = fdes.readline().strip() # get only first line
                    fdes.close()
                    if path_to_file.endswith('version'):
                        # sourcemage_version and slackware-version files
                        # have all the info we need (name and version of distro)
                        if not os.path.basename(path_to_file).startswith(
                                'sourcemage') or not\
                                os.path.basename(path_to_file).startswith('slackware'):
                            text = distro_name + ' ' + text
                    elif path_to_file.endswith('aurox-release') or \
                            path_to_file.endswith('arch-release'):
                        # file doesn't have version
                        text = distro_name
                    elif path_to_file.endswith('lfs-release'):
                        # file just has version
                        text = distro_name + ' ' + text
                os_info = text.replace('\n', '')
                return os_info

        # our last chance, ask uname and strip it
        uname_output = _get_output_of_command('uname -sr')
        if uname_output is not None:
            os_info = uname_output[0] # only first line
            return os_info
    os_info = 'N/A'
    return os_info

def _datetime_tuple(timestamp):
    """
    Convert a timestamp using strptime and the format: %Y%m%dT%H:%M:%S.

    Because various datetime formats are used, the following exceptions
    are handled:

    * Optional milliseconds appened to the string are removed
    * Optional Z (that means UTC) appened to the string are removed
    * XEP-082 datetime strings have all '-' chars removed to meet the above format.

    :param str timestamp: The string containing the formatted date.
    :return: The date.
    :rtype: :py:class:`datetime.datetime`
    """
    timestamp = timestamp.replace('-', '', 2).replace(':', '')
    date = timestamp[:15]
    tz_msg = timestamp[15:]
    try:
        ret = datetime.strptime(date, '%Y%m%dT%H%M%S')
    except ValueError:
        ret = datetime.now()
    # add the message timezone if any
    try:
        if tz_msg and tz_msg != 'Z':
            tz_mod = -1 if tz_msg[0] == '-' else 1
            tz_msg = time.strptime(tz_msg[1:], '%H%M')
            tz_msg = tz_msg.tm_hour * 3600 + tz_msg.tm_min * 60
            tz_msg = timedelta(seconds=tz_mod * tz_msg)
            ret -= tz_msg
    except ValueError:
        pass # ignore if we got a badly-formatted offset
    # convert UTC to local time, with DST etc.
    if time.daylight and time.localtime().tm_isdst:
        tz = timedelta(seconds=-time.altzone)
    else:
        tz = timedelta(seconds=-time.timezone)
    ret += tz
    return ret

def get_utc_time(local_time=None):
    """
    Get the current UTC time

    :param datetime local_time: The current local time
    :return: The current UTC time
    """
    if local_time is None:
        local_time = datetime.now()
        isdst = time.localtime().tm_isdst
    else:
        isdst = time.localtime(int(local_time.timestamp())).tm_isdst

    if time.daylight and isdst:
        tz = timedelta(seconds=time.altzone)
    else:
        tz = timedelta(seconds=time.timezone)

    utc_time = local_time + tz

    return utc_time

def get_local_time(utc_time):
    """
    Get the local time from an UTC time
    """
    isdst = time.localtime(int(utc_time.timestamp())).tm_isdst

    if time.daylight and isdst:
        tz = timedelta(seconds=time.altzone)
    else:
        tz = timedelta(seconds=time.timezone)

    local_time = utc_time - tz

    return local_time

def find_delayed_tag(message):
    """
    Check if a message is delayed or not.

    :param slixmpp.Message message: The message to check.
    :return: A tuple containing (True, the datetime) or (False, None)
    :rtype: :py:class:`tuple`
    """

    delay_tag = message.find('{urn:xmpp:delay}delay')
    if delay_tag is not None:
        delayed = True
        date = _datetime_tuple(delay_tag.attrib['stamp'])
    else:
        # We support the OLD and deprecated XEP: http://xmpp.org/extensions/xep-0091.html
        # But it sucks, please, Jabber servers, don't do this :(
        delay_tag = message.find('{jabber:x:delay}x')
        if delay_tag is not None:
            delayed = True
            date = _datetime_tuple(delay_tag.attrib['stamp'])
        else:
            delayed = False
            date = None
    return (delayed, date)

def shell_split(st):
    """
    Split a string correctly according to the quotes
    around the elements.

    :param str st: The string to split.
    :return: A list of the different of the string.
    :rtype: :py:class:`list`

    >>> shell_split('"sdf 1" "toto 2"')
    ['sdf 1', 'toto 2']
    """
    sh = shlex(st)
    ret = []
    w = sh.get_token()
    while w and w[2] is not None:
        ret.append(w[2])
        if w[1] == len(st):
            return ret
        w = sh.get_token()
    return ret

def find_argument(pos, text, quoted=True):
    """
    Split an input into a list of arguments, return the number of the
    argument selected by pos.

    If the position searched is outside the string, or in a space between words,
    then it will return the position of an hypothetical new argument.

    See the doctests of the two methods for example behaviors.

    :param int pos: The position to search.
    :param str text: The text to analyze.
    :param bool quoted: Whether to take quotes into account or not.
    :rtype: int
    """
    if quoted:
        return _find_argument_quoted(pos, text)
    else:
        return _find_argument_unquoted(pos, text)

def _find_argument_quoted(pos, text):
    """
    Get the number of the argument at position pos in
    a string with possibly quoted text.
    """
    sh = shlex(text)
    count = -1
    w = sh.get_token()
    while w and w[2] is not None:
        count += 1
        if w[0] <= pos < w[1]:
            return count
        w = sh.get_token()

    return count + 1

def _find_argument_unquoted(pos, text):
    """
    Get the number of the argument at position pos in
    a string without interpreting quotes.
    """
    ret = text.split()
    search = 0
    argnum = 0
    for i, elem in enumerate(ret):
        elem_start = text.find(elem, search)
        elem_end = elem_start + len(elem)
        search = elem_end
        if elem_start <= pos < elem_end:
            return i
        argnum = i
    return argnum + 1

def parse_str_to_secs(duration=''):
    """
    Parse a string of with a number of d, h, m, s.

    :param str duration: The formatted string.
    :return: The number of seconds represented by the string
    :rtype: :py:class:`int`

    >>> parse_str_to_secs("1d3m1h")
    90180
    """
    values = {'s': 1, 'm': 60, 'h': 3600, 'd': 86400}
    result = 0
    tmp = '0'
    for char in duration:
        if char in string.digits:
            tmp += char
        elif char in values:
            tmp_i = int(tmp)
            result += tmp_i * values[char]
            tmp = '0'
        else:
            return 0
    if tmp != '0':
        result += int(tmp)
    return result

def parse_secs_to_str(duration=0):
    """
    Do the reverse operation of :py:func:`parse_str_to_secs`.

    Parse a number of seconds to a human-readable string.
    The string has the form XdXhXmXs. 0 units are removed.

    :param int duration: The duration, in seconds.
    :return: A formatted string containing the duration.
    :rtype: :py:class:`str`

    >>> parse_secs_to_str(3601)
    '1h1s'
    """
    secs, mins, hours, days = 0, 0, 0, 0
    result = ''
    secs = duration % 60
    mins = (duration % 3600) // 60
    hours = (duration % 86400) // 3600
    days = duration // 86400

    result += '%dd' % days if days else ''
    result += '%dh' % hours if hours else ''
    result += '%dm' % mins if mins else ''
    result += '%ds' % secs if secs else ''
    if not result:
        result = '0s'
    return result

def format_tune_string(infos):
    """
    Contruct a string from a dict created from an "User tune" event.

    :param dict infos: The informations
    :return: The formatted string
    :rtype: :py:class:`str`
    """
    elems = []
    track = infos.get('track')
    if track:
        elems.append(track)
    title = infos.get('title')
    if title:
        elems.append(title)
    else:
        elems.append('Unknown title')
    elems.append('-')
    artist = infos.get('artist')
    if artist:
        elems.append(artist)
    else:
        elems.append('Unknown artist')

    rating = infos.get('rating')
    if rating:
        elems.append('[ ' + rating + '/10 ]')
    length = infos.get('length')
    if length:
        length = int(length)
        secs = length % 60
        mins = length // 60
        secs = str(secs).zfill(2)
        mins = str(mins).zfill(2)
        elems.append('[' + mins + ':' + secs + ']')
    return ' '.join(elems)

def format_gaming_string(infos):
    """
    Construct a string from a dict containing the "user gaming"
    informations.
    (for now, only use address and name)

    :param dict infos: The informations
    :returns: The formatted string
    :rtype: :py:class:`str`
    """
    name = infos.get('name')
    if not name:
        return ''

    server_address = infos.get('server_address')
    if server_address:
        return '%s on %s' % (name, server_address)
    return name

def safeJID(*args, **kwargs):
    """
    Construct a :py:class:`slixmpp.JID` object from a string.

    Used to avoid tracebacks during is stringprep fails
    (fall back to a JID with an empty string).
    """
    try:
        return JID(*args, **kwargs)
    except InvalidJID:
        return JID('')