music_album_creation.tracks_parsing.StringParser.get_instance() - Code Metrics - Inspection of "Add the downloading trials concept" - boromir674/music-album-creator - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Push — test-coverage ( b95e5a )

by Konstantinos

created 2019-07-20 19:30 UTC

StringParser.get_instance() A

↳ Parent: music_album_creation.tracks_parsing

Complexity

Conditions

Size

Total Lines	3
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	3
nop	1
dl	0
loc	3
rs	10
c	0
b	0
f	0

import os
import re
import time


class StringToDictParser:
    """Parses album information out of video title string"""
    check = re.compile(r'^s([1-9]\d*)$')

    def __init__(self, entities, separators):
        assert all(type(x) == str for x in separators)
        self.entities = {k: AlbumInfoEntity(k, v) for k, v in entities.items()}
        self.separators = separators

    def __call__(self, *args, **kwargs):
        title = args[0]
        design = kwargs['design']
        assert all(0 <= len(x) <= len(self.entities) + len(self.separators) and all(type(y) == str for y in x) for x in design)
        assert all(all(StringToDictParser.check.match(y) for y in x if y.startswith('s')) for x in design)
        rregs = [RegexSequence([_ for _ in self._yield_reg_comp(d)]) for d in design]
        return max([r.search_n_dict(title) for r in rregs], key=lambda x: len(x))

    def _yield_reg_comp(self, kati):
        for k in kati:
            if k.startswith('s'):
                yield self.separators[int(StringToDictParser.check.match(k).group(1)) - 1]
            else:
                yield self.entities[k]

class AlbumInfoEntity:
    def __init__(self, name, reg):
        self.name = name
        self.reg = reg

    def __str__(self):
        return self.reg


class RegexSequence:
    def __init__(self, data):
        self._keys = [d.name for d in data if hasattr(d, 'name')]
        self._regex = r'{}'.format(''.join(str(d) for d in data))

    def search_n_dict(self, string):
        return dict(_ for _ in zip(self._keys, list(getattr(re.search(self._regex, string), 'groups', lambda: ['', '', ''])())) if _[1])

    def __str__(self):
        return self._regex


class StringParser:
    __instance = None

    track_number = r'\d{1,2}'
    track_name = r'[\w\'\(\) \-’]*[\w)]'
    sep = r'(?:[\t ]+|[\t ]*[\.\-,]+[\t ]*)'
    extension = r'\.mp3'
    hhmmss = r'(?:\d?\d:)*\d?\d'

    ## to parse from youtube video title string
    sep1 = r'[\t ]*[\-\.][\t ]*'
    sep2 = r'[\t \-\.]+'
    year = r'\(?(\d{4})\)?'
    art = r'([\w ]*\w)'
    alb = r'([\w ]*\w)'

    album_info_parser = StringToDictParser({'artist': art, 'album': alb, 'year': year}, [sep1, sep2])

    def __new__(cls, *args, **kwargs):
        if not cls.__instance:
            cls.__instance = super().__new__(cls)
        return cls.__instance

    @classmethod
    def parse_track_number_n_name(cls, file_name):
        """Call this method to get a dict like {'track_number': 'number', 'track_name': 'name'} from input file name with format like '1. - Loyal to the Pack.mp3'; number must be included!"""
        return dict(zip(['track_number', 'track_name'], list(re.compile(r'({}){}({}){}$'.format(cls.track_number, cls.sep2, cls.track_name, cls.extension)).search(file_name).groups())))

    @classmethod
    def duration_data_to_timestamp_data(cls, duration_data):
        """Call this to transform data concerning tracks' starting timestamps to tracks' time duration. In both cases the format is hh:mm:ss"""
        return [list(_) for _ in cls._gen_timestamp_data(duration_data)]

    @staticmethod
    def _gen_timestamp_data(duration_data):
        """
        :param list of lists duration_data: each inner list has as 1st element a track name and as 2nd the track duration in hh:mm:s format
        :return: list of lists with timestamps instead of durations ready to feed for segmentation
        :rtype: list
        """
        i = 1
        p = Timestamp('0:00')
        yield duration_data[0][0], str(p)
        while i < len(duration_data):
            yield duration_data[i][0], str(p + Timestamp(duration_data[i-1][1]))
            p += Timestamp(duration_data[i-1][1])
            i += 1

    @classmethod
    def parse_hhmmss_string(cls, tracks):
        """Call this method to transform a '\n' separabale string of album tracks (eg copy-pasted from video description) to a list of lists. Inner lists contains [track_name, hhmmss_timestamp].\n
        :param str tracks:
        :return:
        """
        return [_ for _ in cls._parse_string(tracks)]

    @classmethod
    def _parse_string(cls, tracks):
        """
        :param str tracks: a '\n' separable string of lines coresponding to the tracks information
        :return:
        """
        # regex = re.compile('(?:\d{1,2}[ \t]*[\.\-,][ \t]*|[\t ]+)?([\w\'\(\) ]*[\w)])' + cls.sep + '((?:\d?\d:)*\d?\d)$')
        for i, line in enumerate(_.strip() for _ in tracks.split('\n')):
            if line == '':
                continue
            try:
                yield cls._parse_track_line(line)
            except AttributeError:
                raise WrongTimestampFormat("Couldn't parse line {}: '{}'. Please use a format as 'trackname - 3:45'".format(i + 1, line))

    @classmethod
    def _parse_track_line(cls, track_line):
        """Parses a string line such as '01. Doteru 3:45'"""
        # regex = re.compile(r"""^(?:\d{1,2}(?:[\ \t]*[\.\-,][\ \t]*|[\t\ ]+))?  # potential track number (eg 01) included is ignored
        #                             ([\w\'\(\) \-’]*[\w)])                       # track name
        #                             (?:[\t ]+|[\t ]*[\-\.]+[\t ]*)            # separator between name and time
        #                             ((?:\d?\d:)*\d?\d)$                       # time in hh:mm:ss format""", re.X)
        regex = re.compile(r"^(?:{}{})?({}){}({})$".format(cls.track_number, cls.sep, cls.track_name, cls.sep, cls.hhmmss))
        return list(regex.search(track_line.strip()).groups())

    @classmethod
    def get_instance(cls):
        return StringParser()

    @classmethod
    def parse_tracks_hhmmss(cls, tracks_row_strings):
        """
        Call this method to transform a
        Returns parsed tracks: track_title and timestamp in hh:mm:ss format given the multiline string. Ignores potentially
        found track numbers in the start of each line  Returs a list of lists. Each inner list holds the captured groups in the parenthesis'\n
        :param str tracks_row_strings:
        :return: a list of lists with each inner list corresponding to each input string row and having 2 elements: the track name and the timestamp
        :rtype: list
        """
        return cls.parse_hhmmss_string(tracks_row_strings)

    @classmethod
    def hhmmss_durations_to_timestamps(cls, hhmmss_list):
        return [_ for _ in cls._generate_timestamps(hhmmss_list)]

    @classmethod
    def _generate_timestamps(cls, hhmmss_list):
        p = '0:00'
        yield p
        for el in hhmmss_list[:-1]:
            _ = cls.add(p, el)
            yield _
            p = _

    @classmethod
    def convert_to_timestamps(cls, tracks_row_strings):
        """Call this method to transform a '\n' separabale string of album tracks (eg copy-pasted from the youtube video description) that represents durations (in hhmmss format)
        to a list of strings with each track's starting timestamp in hhmmss format.\n
        :param str tracks_row_strings:
        :return: the list of each track's timestamp
        :rtype: list
        """
        lines = cls.parse_tracks_hhmmss(tracks_row_strings)  # list of lists
        i = 1
        timestamps = ['0:00']
        while i < len(lines):
            timestamps.append(cls.add(timestamps[i-1], lines[i-1][-1]))
            i += 1
        return timestamps

    @classmethod
    def add(cls, timestamp1: str, duration: str) -> object:
        """
        :param str timestamp1: hh:mm:ss
        :param str duration: hh:mm:ss
        :return: hh:mm:ss
        :rtype: str
        """
        return cls.time_format(cls.to_seconds(timestamp1) + cls.to_seconds(duration))

    @staticmethod
    def to_seconds(timestamp):
        """Call this method to transform a hh:mm:ss formatted string timestamp to its equivalent duration in seconds as an integer"""
        return sum([60**i * int(x) for i, x in enumerate(reversed(timestamp.split(':')))])

    @staticmethod
    def time_format(seconds):
        """Call this method to transform an integer representing time duration in seconds to its equivalent hh:mm:ss formatted string representeation"""
        return time.strftime('%H:%M:%S', time.gmtime(seconds))

    @classmethod
    def parse_album_info(cls, video_title):
        """Call to parse a video title string into a hash (dictionary) of potentially all 'artist', 'album' and 'year' fields.\n
        Can parse patters:
         - Artist Album Year\n
         - Artist Album\n
         - Album Year\n
         - Album\n
        :param str video_title:
        :return: the exracted values as a dictionary having maximally keys: {'artist', 'album', 'year'}
        :rtype: dict
        """
        return cls.album_info_parser(video_title, design=[['artist', 's1', 'album', 's2', 'year'],
                                                          ['artist', 's1', 'album'],
                                                          ['album', 's2', 'year'],
                                                          ['album']])

    @classmethod
    def convert_tracks_data(cls, data, album_file, target_directory=''):
        """
        Converts input Nx2 list of lists to Nx3 list of lists. The exception being the last list that has 2 elements\n
        :param list of lists data: each inner list should contain track title (no need for number and without extension)
        and starting time stamp in hh:mm:ss format
        :param str album_file: the path to the audio file of the entire album to potentially segment
        :param str target_directory: path to desired directory path to store the potentially created album
        :return: each iner list contains track title and timestamp in seconds
        :rtype: list of lists
        """
        return [list(_) for _ in cls._generate_data(data, album_file, target_directory)]

    @classmethod
    def _generate_data(cls, data, album_file, target_directory):
        """
        Given a data list, with each element representing an album's track (as an inner 2-element list with 1st element the 'track_name' and 2nd a timetamp in hh:mm:ss format (the track starts it's playback at that timestamp in relation with the total album playtime), the path to the alum file at hand and the desired output directory or potentially storing the track files,
        generates 3-length tuples with the track_file_path, starting timestamp and ending timestamp. Purpose is for the yielded tripplets to be digested for audio segmentation. The exception being the last tuple yielded that has 2 elements; it naturally misses the ending timestamp.\n
        :param list data:
        :param str album_file:
        :param str target_directory:
        :returns: 3-element tuples with track_name, starting_timestamp, ending_timestamp
        :rtype: tuple
        """
        cls.__album_file = album_file
        cls.__target_directory = target_directory
        cls.__track_index_generator = iter((lambda x: str(x) if 9 < x else '0' + str(x))(_) for _ in range(1, len(data) + 1))
        for i in range(len(data)-1):
            if Timestamp(data[i + 1][1]) <= Timestamp(data[i][1]):
                raise TrackTimestampsSequenceError(
                    "Track '{} - {}' starting timestamp '{}' should be 'bigger' than track's '{} - {}'; '{}'".format(
                        i + 2, data[i + 1][0], data[i + 1][1],
                        i + 1, data[i][0], data[i][1]))
            yield (
                cls.__track_file(data[i][0]),
                str(int(Timestamp(data[i][1]))),
                str(int(Timestamp(data[i + 1][1])))
            )
        yield (
            cls.__track_file(data[-1][0]),
            str(int(Timestamp(data[-1][1]))),
        )

    @classmethod
    def __track_file(cls, track_name):
        return os.path.join(cls.__target_directory, '{} - {}{}'.format(
            next(cls.__track_index_generator),
            track_name,
            (lambda x: '.' + x.split('.')[-1] if len(x.split('.')) > 1 else '')(cls.__album_file)))


class Timestamp:
    instances = {}

    def __new__(cls, *args, **kwargs):
        hhmmss = args[0]
        if hhmmss in cls.instances:
            return cls.instances[hhmmss]
        match = re.fullmatch(r'((\d?\d):){0,2}(\d?\d)', hhmmss)
        if not match:
            raise WrongTimestampFormat("Timestamp given: '{}'. Please use the 'hh:mm:ss' format.".format(hhmmss))
        values = [int(_) for _ in hhmmss.split(':')]
        if not all([0 <= _ <= 60 for _ in values]):
            raise WrongTimestampFormat("Timestamp given: '{}'. Please use the 'hh:mm:ss' format.".format(hhmmss))
        x = super().__new__(cls)
        x._s = sum([60 ** i * int(x) for i, x in enumerate(reversed(values))])
        x._b = hhmmss
        cls.instances[hhmmss] = x
        return x

    def __init__(self, hhmmss):
        pass

    @staticmethod
    def from_duration(seconds):
        return Timestamp(time.strftime('%H:%M:%S', time.gmtime(seconds)))

    def __repr__(self):
        return self._b

    def __str__(self):
        return self._b

    def __eq__(self, other):
        return str(self) == str(other)

    def __int__(self):
        return self._s

    def __lt__(self, other):
        return int(self) < int(other)

    def __le__(self, other):
        return int(self) <= int(other)

    def __gt__(self, other):
        return int(other) < int(self)

    def __ge__(self, other):
        return int(other) <= int(self)

    def __add__(self, other):
        return Timestamp.from_duration(int(self) + int(other))

    def __sub__(self, other):
        return Timestamp.from_duration(int(self) - int(other))


class WrongTimestampFormat(Exception): pass
class TrackTimestampsSequenceError(Exception): pass


1			import os
2			import re
3			import time
4
5
6			class StringToDictParser:
7			"""Parses album information out of video title string"""
8			check = re.compile(r'^s([1-9]\d*)$')
9
10			def __init__(self, entities, separators):
11			assert all(type(x) == str for x in separators)
12			self.entities = {k: AlbumInfoEntity(k, v) for k, v in entities.items()}
13			self.separators = separators
14
15			def __call__(self, args, *kwargs):
16			title = args[0]
17			design = kwargs['design']
18			assert all(0 <= len(x) <= len(self.entities) + len(self.separators) and all(type(y) == str for y in x) for x in design)
19			assert all(all(StringToDictParser.check.match(y) for y in x if y.startswith('s')) for x in design)
20			rregs = [RegexSequence([_ for _ in self._yield_reg_comp(d)]) for d in design]
21			return max([r.search_n_dict(title) for r in rregs], key=lambda x: len(x))
22
23			def _yield_reg_comp(self, kati):
24			for k in kati:
25			if k.startswith('s'):
26			yield self.separators[int(StringToDictParser.check.match(k).group(1)) - 1]
27			else:
28			yield self.entities[k]
29
30			class AlbumInfoEntity:
31			def __init__(self, name, reg):
32			self.name = name
33			self.reg = reg
34
35			def __str__(self):
36			return self.reg
37
38
39			class RegexSequence:
40			def __init__(self, data):
41			self._keys = [d.name for d in data if hasattr(d, 'name')]
42			self._regex = r'{}'.format(''.join(str(d) for d in data))
43
44			def search_n_dict(self, string):
45			return dict(_ for _ in zip(self._keys, list(getattr(re.search(self._regex, string), 'groups', lambda: ['', '', ''])())) if _[1])
46
47			def __str__(self):
48			return self._regex
49
50
51			class StringParser:
52			__instance = None
53
54			track_number = r'\d{1,2}'
55			track_name = r'[\w\'\(\) \-’]*[\w)]'
56			sep = r'(?:[\t ]+\|[\t ][\.\-,]+[\t ])'
57			extension = r'\.mp3'
58			hhmmss = r'(?:\d?\d:)*\d?\d'
59
60			## to parse from youtube video title string
61			sep1 = r'[\t ][\-\.][\t ]'
62			sep2 = r'[\t \-\.]+'
63			year = r'\(?(\d{4})\)?'
64			art = r'([\w ]*\w)'
65			alb = r'([\w ]*\w)'
66
67			album_info_parser = StringToDictParser({'artist': art, 'album': alb, 'year': year}, [sep1, sep2])
68
69			def __new__(cls, args, *kwargs):
70			if not cls.__instance:
71			cls.__instance = super().__new__(cls)
72			return cls.__instance
73
74			@classmethod
75			def parse_track_number_n_name(cls, file_name):
76			"""Call this method to get a dict like {'track_number': 'number', 'track_name': 'name'} from input file name with format like '1. - Loyal to the Pack.mp3'; number must be included!"""
77			return dict(zip(['track_number', 'track_name'], list(re.compile(r'({}){}({}){}$'.format(cls.track_number, cls.sep2, cls.track_name, cls.extension)).search(file_name).groups())))
78
79			@classmethod
80			def duration_data_to_timestamp_data(cls, duration_data):
81			"""Call this to transform data concerning tracks' starting timestamps to tracks' time duration. In both cases the format is hh:mm:ss"""
82			return [list(_) for _ in cls._gen_timestamp_data(duration_data)]
83
84			@staticmethod
85			def _gen_timestamp_data(duration_data):
86			"""
87			:param list of lists duration_data: each inner list has as 1st element a track name and as 2nd the track duration in hh:mm:s format
88			:return: list of lists with timestamps instead of durations ready to feed for segmentation
89			:rtype: list
90			"""
91			i = 1
92			p = Timestamp('0:00')
93			yield duration_data[0][0], str(p)
94			while i < len(duration_data):
95			yield duration_data[i][0], str(p + Timestamp(duration_data[i-1][1]))
96			p += Timestamp(duration_data[i-1][1])
97			i += 1
98
99			@classmethod
100			def parse_hhmmss_string(cls, tracks):
101			"""Call this method to transform a '\n' separabale string of album tracks (eg copy-pasted from video description) to a list of lists. Inner lists contains [track_name, hhmmss_timestamp].\n
102			:param str tracks:
103			:return:
104			"""
105			return [_ for _ in cls._parse_string(tracks)]
106
107			@classmethod
108			def _parse_string(cls, tracks):
109			"""
110			:param str tracks: a '\n' separable string of lines coresponding to the tracks information
111			:return:
112			"""
113			# regex = re.compile('(?:\d{1,2}[ \t][\.\-,][ \t]\|[\t ]+)?([\w\'\(\) ][\w)])' + cls.sep + '((?:\d?\d:)\d?\d)$')
114			for i, line in enumerate(_.strip() for _ in tracks.split('\n')):
115			if line == '':
116			continue
117			try:
118			yield cls._parse_track_line(line)
119			except AttributeError:
120			raise WrongTimestampFormat("Couldn't parse line {}: '{}'. Please use a format as 'trackname - 3:45'".format(i + 1, line))
121
122			@classmethod
123			def _parse_track_line(cls, track_line):
124			"""Parses a string line such as '01. Doteru 3:45'"""
125			# regex = re.compile(r"""^(?:\d{1,2}(?:[\ \t][\.\-,][\ \t]\|[\t\ ]+))? # potential track number (eg 01) included is ignored
126			# ([\w\'\(\) \-’]*[\w)]) # track name
127			# (?:[\t ]+\|[\t ][\-\.]+[\t ]) # separator between name and time
128			# ((?:\d?\d:)*\d?\d)$ # time in hh:mm:ss format""", re.X)
129			regex = re.compile(r"^(?:{}{})?({}){}({})$".format(cls.track_number, cls.sep, cls.track_name, cls.sep, cls.hhmmss))
130			return list(regex.search(track_line.strip()).groups())
131
132			@classmethod
133			def get_instance(cls):
134			return StringParser()
135
136			@classmethod
137			def parse_tracks_hhmmss(cls, tracks_row_strings):
138			"""
139			Call this method to transform a
140			Returns parsed tracks: track_title and timestamp in hh:mm:ss format given the multiline string. Ignores potentially
141			found track numbers in the start of each line Returs a list of lists. Each inner list holds the captured groups in the parenthesis'\n
142			:param str tracks_row_strings:
143			:return: a list of lists with each inner list corresponding to each input string row and having 2 elements: the track name and the timestamp
144			:rtype: list
145			"""
146			return cls.parse_hhmmss_string(tracks_row_strings)
147
148			@classmethod
149			def hhmmss_durations_to_timestamps(cls, hhmmss_list):
150			return [_ for _ in cls._generate_timestamps(hhmmss_list)]
151
152			@classmethod
153			def _generate_timestamps(cls, hhmmss_list):
154			p = '0:00'
155			yield p
156			for el in hhmmss_list[:-1]:
157			_ = cls.add(p, el)
158			yield _
159			p = _
160
161			@classmethod
162			def convert_to_timestamps(cls, tracks_row_strings):
163			"""Call this method to transform a '\n' separabale string of album tracks (eg copy-pasted from the youtube video description) that represents durations (in hhmmss format)
164			to a list of strings with each track's starting timestamp in hhmmss format.\n
165			:param str tracks_row_strings:
166			:return: the list of each track's timestamp
167			:rtype: list
168			"""
169			lines = cls.parse_tracks_hhmmss(tracks_row_strings) # list of lists
170			i = 1
171			timestamps = ['0:00']
172			while i < len(lines):
173			timestamps.append(cls.add(timestamps[i-1], lines[i-1][-1]))
174			i += 1
175			return timestamps
176
177			@classmethod
178			def add(cls, timestamp1: str, duration: str) -> object:
179			"""
180			:param str timestamp1: hh:mm:ss
181			:param str duration: hh:mm:ss
182			:return: hh:mm:ss
183			:rtype: str
184			"""
185			return cls.time_format(cls.to_seconds(timestamp1) + cls.to_seconds(duration))
186
187			@staticmethod
188			def to_seconds(timestamp):
189			"""Call this method to transform a hh:mm:ss formatted string timestamp to its equivalent duration in seconds as an integer"""
190			return sum([60*i int(x) for i, x in enumerate(reversed(timestamp.split(':')))])
191
192			@staticmethod
193			def time_format(seconds):
194			"""Call this method to transform an integer representing time duration in seconds to its equivalent hh:mm:ss formatted string representeation"""
195			return time.strftime('%H:%M:%S', time.gmtime(seconds))
196
197			@classmethod
198			def parse_album_info(cls, video_title):
199			"""Call to parse a video title string into a hash (dictionary) of potentially all 'artist', 'album' and 'year' fields.\n
200			Can parse patters:
201			- Artist Album Year\n
202			- Artist Album\n
203			- Album Year\n
204			- Album\n
205			:param str video_title:
206			:return: the exracted values as a dictionary having maximally keys: {'artist', 'album', 'year'}
207			:rtype: dict
208			"""
209			return cls.album_info_parser(video_title, design=[['artist', 's1', 'album', 's2', 'year'],
210			['artist', 's1', 'album'],
211			['album', 's2', 'year'],
212			['album']])
213
214			@classmethod
215			def convert_tracks_data(cls, data, album_file, target_directory=''):
216			"""
217			Converts input Nx2 list of lists to Nx3 list of lists. The exception being the last list that has 2 elements\n
218			:param list of lists data: each inner list should contain track title (no need for number and without extension)
219			and starting time stamp in hh:mm:ss format
220			:param str album_file: the path to the audio file of the entire album to potentially segment
221			:param str target_directory: path to desired directory path to store the potentially created album
222			:return: each iner list contains track title and timestamp in seconds
223			:rtype: list of lists
224			"""
225			return [list(_) for _ in cls._generate_data(data, album_file, target_directory)]
226
227			@classmethod
228			def _generate_data(cls, data, album_file, target_directory):
229			"""
230			Given a data list, with each element representing an album's track (as an inner 2-element list with 1st element the 'track_name' and 2nd a timetamp in hh:mm:ss format (the track starts it's playback at that timestamp in relation with the total album playtime), the path to the alum file at hand and the desired output directory or potentially storing the track files,
231			generates 3-length tuples with the track_file_path, starting timestamp and ending timestamp. Purpose is for the yielded tripplets to be digested for audio segmentation. The exception being the last tuple yielded that has 2 elements; it naturally misses the ending timestamp.\n
232			:param list data:
233			:param str album_file:
234			:param str target_directory:
235			:returns: 3-element tuples with track_name, starting_timestamp, ending_timestamp
236			:rtype: tuple
237			"""
238			cls.__album_file = album_file
239			cls.__target_directory = target_directory
240			cls.__track_index_generator = iter((lambda x: str(x) if 9 < x else '0' + str(x))(_) for _ in range(1, len(data) + 1))
241			for i in range(len(data)-1):
242			if Timestamp(data[i + 1][1]) <= Timestamp(data[i][1]):
243			raise TrackTimestampsSequenceError(
244			"Track '{} - {}' starting timestamp '{}' should be 'bigger' than track's '{} - {}'; '{}'".format(
245			i + 2, data[i + 1][0], data[i + 1][1],
246			i + 1, data[i][0], data[i][1]))
247			yield (
248			cls.__track_file(data[i][0]),
249			str(int(Timestamp(data[i][1]))),
250			str(int(Timestamp(data[i + 1][1])))
251			)
252			yield (
253			cls.__track_file(data[-1][0]),
254			str(int(Timestamp(data[-1][1]))),
255			)
256
257			@classmethod
258			def __track_file(cls, track_name):
259			return os.path.join(cls.__target_directory, '{} - {}{}'.format(
260			next(cls.__track_index_generator),
261			track_name,
262			(lambda x: '.' + x.split('.')[-1] if len(x.split('.')) > 1 else '')(cls.__album_file)))
263
264
265			class Timestamp:
266			instances = {}
267
268			def __new__(cls, args, *kwargs):
269			hhmmss = args[0]
270			if hhmmss in cls.instances:
271			return cls.instances[hhmmss]
272			match = re.fullmatch(r'((\d?\d):){0,2}(\d?\d)', hhmmss)
273			if not match:
274			raise WrongTimestampFormat("Timestamp given: '{}'. Please use the 'hh:mm:ss' format.".format(hhmmss))
275			values = [int(_) for _ in hhmmss.split(':')]
276			if not all([0 <= _ <= 60 for _ in values]):
277			raise WrongTimestampFormat("Timestamp given: '{}'. Please use the 'hh:mm:ss' format.".format(hhmmss))
278			x = super().__new__(cls)
279			x._s = sum([60 ** i * int(x) for i, x in enumerate(reversed(values))])
280			x._b = hhmmss
281			cls.instances[hhmmss] = x
282			return x
283
284			def __init__(self, hhmmss):
285			pass
286
287			@staticmethod
288			def from_duration(seconds):
289			return Timestamp(time.strftime('%H:%M:%S', time.gmtime(seconds)))
290
291			def __repr__(self):
292			return self._b
293
294			def __str__(self):
295			return self._b
296
297			def __eq__(self, other):
298			return str(self) == str(other)
299
300			def __int__(self):
301			return self._s
302
303			def __lt__(self, other):
304			return int(self) < int(other)
305
306			def __le__(self, other):
307			return int(self) <= int(other)
308
309			def __gt__(self, other):
310			return int(other) < int(self)
311
312			def __ge__(self, other):
313			return int(other) <= int(self)
314
315			def __add__(self, other):
316			return Timestamp.from_duration(int(self) + int(other))
317
318			def __sub__(self, other):
319			return Timestamp.from_duration(int(self) - int(other))
320
321
322			class WrongTimestampFormat(Exception): pass
323			class TrackTimestampsSequenceError(Exception): pass
324

boromir674 / music-album-creator

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StringParser.get_instance() A

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