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diff --git a/raphodo/generatename.py b/raphodo/generatename.py
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+#!/usr/bin/env python3
+
+# Copyright (C) 2007-2016 Damon Lynch <damonlynch@gmail.com>
+
+# This file is part of Rapid Photo Downloader.
+#
+# Rapid Photo Downloader is free software: you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Rapid Photo Downloader is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Rapid Photo Downloader. If not,
+# see <http://www.gnu.org/licenses/>.
+### USA
+
+__author__ = 'Damon Lynch'
+__copyright__ = "Copyright 2007-2016, Damon Lynch"
+
+import re
+from datetime import datetime, timedelta
+import string
+from collections import namedtuple
+import logging
+from typing import Sequence, Optional, List, Union
+
+from gettext import gettext as _
+
+from raphodo.preferences import DownloadsTodayTracker
+import raphodo.problemnotification as pn
+from raphodo.problemnotification import (
+ RenamingProblems, FilenameNotFullyGeneratedProblem, make_href,
+ FolderNotFullyGeneratedProblemProblem, Problem
+)
+from raphodo.rpdfile import RPDFile, Photo, Video
+from raphodo.storage import get_uri
+
+from raphodo.generatenameconfig import *
+
+
+MatchedSequences = namedtuple('MatchedSequences',
+ 'session_sequence_no, sequence_letter, downloads_today, stored_sequence_no')
+
+
+def convert_date_for_strftime(datetime_user_choice):
+ try:
+ return DATE_TIME_CONVERT[LIST_DATE_TIME_L2.index(datetime_user_choice)]
+ except KeyError:
+ raise PrefValueInvalidError(datetime_user_choice)
+
+
+class abstract_attribute():
+ """
+ http://stackoverflow.com/questions/32536176/how-to-define-lazy-variable-in-python-which-will-
+ raise-notimplementederror-for-a/32536493
+ """
+
+ def __get__(self, obj, type):
+ # Now we will iterate over the names on the class,
+ # and all its superclasses, and try to find the attribute
+ # name for this descriptor
+ # traverse the parents in the method resolution order
+ for cls in type.__mro__:
+ # for each cls thus, see what attributes they set
+ for name, value in cls.__dict__.items():
+ # we found ourselves here
+ if value is self:
+ # if the property gets accessed as Child.variable,
+ # obj will be done. For this case
+ # If accessed as a_child.variable, the class Child is
+ # in the type, and a_child in the obj.
+ this_obj = obj if obj else type
+
+ raise NotImplementedError(
+ "%r does not have the attribute %r "
+ "(abstract from class %r)" %
+ (this_obj, name, cls.__name__))
+
+ # we did not find a match, should be rare, but prepare for it
+ raise NotImplementedError(
+ "%s does not set the abstract attribute <unknown>", type.__name__)
+
+
+GenerationErrors = Union[FilenameNotFullyGeneratedProblem, FolderNotFullyGeneratedProblemProblem]
+
+
+class NameGeneration:
+ """
+ Generate the name of a photo. Used as a base class for generating names
+ of videos, as well as subfolder names for both file types
+ """
+
+ def __init__(self,
+ pref_list: List[str],
+ problems: Optional[RenamingProblems]=None) -> None:
+ self.pref_list = pref_list
+ self.no_metadata = False
+
+ self.problems = problems
+ self.problem = abstract_attribute() # type: GenerationErrors
+
+ self.strip_forward_slash = abstract_attribute()
+ self.add_extension = abstract_attribute()
+ self.L1_date_check = abstract_attribute()
+
+ self.L0 = ''
+ self.L1 = ''
+ self.L2 = ''
+
+ def _get_values_from_pref_list(self):
+ for i in range(0, len(self.pref_list), 3):
+ yield (self.pref_list[i], self.pref_list[i + 1], self.pref_list[i + 2])
+
+ def _get_date_component(self):
+ """
+ Returns portion of new file / subfolder name based on date time.
+ If the date is missing, will attempt to use the fallback date.
+ """
+
+ # step 1: get the correct value from metadata
+ if self.L1 == self.L1_date_check:
+ if self.no_metadata:
+ if self.L2 == SUBSECONDS:
+ d = datetime.fromtimestamp(self.rpd_file.modification_time)
+ if not d.microsecond:
+ d = '00'
+ try:
+ d = str(round(int(str(d.microsecond)[:3]) / 10))
+ except:
+ d = '00'
+ return d
+ d = datetime.fromtimestamp(self.rpd_file.ctime)
+ else:
+ if self.L2 == SUBSECONDS:
+ d = self.rpd_file.metadata.sub_seconds(missing=None)
+ if d is None:
+ self.problem.missing_metadata.append(_(self.L2))
+ return ''
+ else:
+ return d
+ else:
+ d = self.rpd_file.date_time(missing=None)
+
+ elif self.L1 == TODAY:
+ d = datetime.now()
+ elif self.L1 == YESTERDAY:
+ delta = timedelta(days=1)
+ d = datetime.now() - delta
+ elif self.L1 == DOWNLOAD_TIME:
+ d = self.rpd_file.download_start_time
+ else:
+ raise TypeError("Date options invalid")
+
+ # step 2: if have a value, try to convert it to string format
+ if d:
+ try:
+ return d.strftime(convert_date_for_strftime(self.L2))
+ except Exception as e:
+ logging.warning("Problem converting date/time value for file %s",
+ self.rpd_file.full_file_name)
+ self.problem.bad_converstion_date_time = True
+ self.problem.bad_conversion_exception = e
+
+ # step 3: handle a missing value using file modification time
+ if self.rpd_file.modification_time:
+ try:
+ d = datetime.fromtimestamp(self.rpd_file.modification_time)
+ except Exception:
+ logging.error(
+ "Both file modification time and metadata date & time "
+ "are invalid for file %s", self.rpd_file.full_file_name)
+ self.problem.invalid_date_time = True
+ return ''
+ else:
+ self.problem.missing_metadata.append(_(self.L1))
+ return ''
+
+ try:
+ return d.strftime(convert_date_for_strftime(self.L2))
+ except:
+ logging.error(
+ "Both file modification time and metadata date & time are "
+ "invalid for file %s", self.rpd_file.full_file_name)
+ self.problem.invalid_date_time = True
+ return ''
+
+ def _get_associated_file_extension(self, associate_file):
+ """
+ Generates extensions with correct capitalization for files like
+ thumbnail or audio files.
+ """
+
+ if not associate_file:
+ return None
+
+ extension = os.path.splitext(associate_file)[1]
+ if self.rpd_file.generate_extension_case == UPPERCASE:
+ extension = extension.upper()
+ elif self.rpd_file.generate_extension_case == LOWERCASE:
+ extension = extension.lower()
+ # else keep extension case the same as what it originally was
+ return extension
+
+ def _get_thm_extension(self):
+ """
+ Generates THM extension with correct capitalization, if needed
+ """
+ self.rpd_file.thm_extension = self._get_associated_file_extension(
+ self.rpd_file.thm_full_name
+ )
+
+ def _get_audio_extension(self):
+ """
+ Generates audio extension with correct capitalization, if needed
+ e.g. WAV or wav
+ """
+ self.rpd_file.audio_extension = self._get_associated_file_extension(
+ self.rpd_file.audio_file_full_name
+ )
+
+ def _get_xmp_extension(self):
+ """
+ Generates XMP extension with correct capitalization, if needed.
+ """
+
+ self.rpd_file.xmp_extension = self._get_associated_file_extension(
+ self.rpd_file.xmp_file_full_name
+ )
+
+ def _get_filename_component(self):
+ """
+ Returns portion of new file / subfolder name based on the file name
+ """
+
+ name, extension = os.path.splitext(self.rpd_file.name)
+
+ if self.L1 == NAME:
+ filename = name
+ elif self.L1 == EXTENSION:
+ # Used in subfolder name generation
+ if extension:
+ # having the period when this is used as a part of a
+ # subfolder name
+ # is a bad idea when it is at the start!
+ filename = extension[1:]
+ else:
+ self.problem.missing_extension = True
+ return ""
+ elif self.L1 == IMAGE_NUMBER or self.L1 == VIDEO_NUMBER:
+ n = re.search("(?P<image_number>[0-9]+$)", name)
+ if not n:
+ self.problem.missing_image_no = True
+ return ''
+ else:
+ image_number = n.group("image_number")
+
+ if self.L2 == IMAGE_NUMBER_ALL:
+ filename = image_number
+ elif self.L2 == IMAGE_NUMBER_1:
+ filename = image_number[-1]
+ elif self.L2 == IMAGE_NUMBER_2:
+ filename = image_number[-2:]
+ elif self.L2 == IMAGE_NUMBER_3:
+ filename = image_number[-3:]
+ else:
+ assert self.L2 == IMAGE_NUMBER_4
+ filename = image_number[-4:]
+ else:
+ raise TypeError("Incorrect filename option")
+
+ if self.L2 == UPPERCASE:
+ filename = filename.upper()
+ elif self.L2 == LOWERCASE:
+ filename = filename.lower()
+
+ return filename
+
+ def _get_metadata_component(self):
+ """
+ Returns portion of new image / subfolder name based on the metadata
+
+ Note: date time metadata found in _getDateComponent()
+ """
+
+ if self.L1 == APERTURE:
+ v = self.rpd_file.metadata.aperture()
+ elif self.L1 == ISO:
+ v = self.rpd_file.metadata.iso()
+ elif self.L1 == EXPOSURE_TIME:
+ v = self.rpd_file.metadata.exposure_time(alternativeFormat=True)
+ elif self.L1 == FOCAL_LENGTH:
+ v = self.rpd_file.metadata.focal_length()
+ elif self.L1 == CAMERA_MAKE:
+ v = self.rpd_file.metadata.camera_make()
+ elif self.L1 == CAMERA_MODEL:
+ v = self.rpd_file.metadata.camera_model()
+ elif self.L1 == SHORT_CAMERA_MODEL:
+ v = self.rpd_file.metadata.short_camera_model()
+ elif self.L1 == SHORT_CAMERA_MODEL_HYPHEN:
+ v = self.rpd_file.metadata.short_camera_model(includeCharacters="\-")
+ elif self.L1 == SERIAL_NUMBER:
+ v = self.rpd_file.metadata.camera_serial()
+ elif self.L1 == SHUTTER_COUNT:
+ v = self.rpd_file.metadata.shutter_count()
+ if v:
+ v = int(v)
+ padding = LIST_SHUTTER_COUNT_L2.index(self.L2) + 3
+ formatter = '%0' + str(padding) + "i"
+ v = formatter % v
+ elif self.L1 == FILE_NUMBER:
+ v = self.rpd_file.metadata.file_number()
+ if v and self.L2 == FILE_NUMBER_FOLDER:
+ v = v[:3]
+ elif self.L1 == OWNER_NAME:
+ v = self.rpd_file.metadata.owner_name()
+ elif self.L1 == ARTIST:
+ v = self.rpd_file.metadata.artist()
+ elif self.L1 == COPYRIGHT:
+ v = self.rpd_file.metadata.copyright()
+ else:
+ raise TypeError("Invalid metadata option specified")
+ if self.L1 in (CAMERA_MAKE, CAMERA_MODEL, SHORT_CAMERA_MODEL,
+ SHORT_CAMERA_MODEL_HYPHEN, OWNER_NAME, ARTIST,
+ COPYRIGHT):
+ if self.L2 == UPPERCASE:
+ v = v.upper()
+ elif self.L2 == LOWERCASE:
+ v = v.lower()
+ if not v:
+ self.problem.missing_metadata.append(_(self.L1))
+ return v
+
+ def _calculate_letter_sequence(self, sequence):
+
+ def _letters(x):
+ """
+ Adapted from algorithm at
+ http://en.wikipedia.org/wiki/Hexavigesimal
+ """
+ v = ''
+ while x > 25:
+ r = x % 26
+ x = x / 26 - 1
+ v = string.ascii_lowercase[r] + v
+ v = string.ascii_lowercase[x] + v
+
+ return v
+
+
+ v = _letters(sequence)
+ if self.L2 == UPPERCASE:
+ v = v.upper()
+
+ return v
+
+ def _format_sequence_no(self, value, amountToPad):
+ padding = LIST_SEQUENCE_NUMBERS_L2.index(amountToPad) + 1
+ formatter = '%0' + str(padding) + "i"
+ return formatter % value
+
+ def _get_downloads_today(self):
+ return self._format_sequence_no(
+ self.rpd_file.sequences.get_downloads_today(), self.L2)
+
+ def _get_session_sequence_no(self):
+ return self._format_sequence_no(
+ self.rpd_file.sequences.get_session_sequence_no(), self.L2)
+
+ def _get_stored_sequence_no(self):
+ return self._format_sequence_no(
+ self.rpd_file.sequences.get_stored_sequence_no(), self.L2)
+
+ def _get_sequence_letter(self):
+ return self._calculate_letter_sequence(
+ self.rpd_file.sequences.get_sequence_letter())
+
+ def _get_sequences_component(self):
+ if self.L1 == DOWNLOAD_SEQ_NUMBER:
+ return self._get_downloads_today()
+ elif self.L1 == SESSION_SEQ_NUMBER:
+ return self._get_session_sequence_no()
+ elif self.L1 == STORED_SEQ_NUMBER:
+ return self._get_stored_sequence_no()
+ elif self.L1 == SEQUENCE_LETTER:
+ return self._get_sequence_letter()
+
+ def _get_component(self):
+ try:
+ if self.L0 == DATE_TIME:
+ return self._get_date_component()
+ elif self.L0 == TEXT:
+ return self.L1
+ elif self.L0 == FILENAME:
+ return self._get_filename_component()
+ elif self.L0 == METADATA:
+ return self._get_metadata_component()
+ elif self.L0 == SEQUENCES:
+ return self._get_sequences_component()
+ elif self.L0 == JOB_CODE:
+ return self.rpd_file.job_code
+ elif self.L0 == SEPARATOR:
+ return os.sep
+ except Exception as e:
+ self.problem.component_problem = _(self.L0)
+ self.problem.component_exception = e
+ return ''
+
+ def filter_strip_characters(self, name: str) -> str:
+ """
+ Filter out unwanted chacters from file and subfolder names
+ :param name: full name or name component
+ :return: filtered name
+ """
+
+ # remove any null characters - they are bad news in file names
+ name = name.replace('\x00', '')
+
+ # the user could potentially copy and paste a block of text with a carriage / line return
+ name = name.replace('\n', '')
+
+ if self.rpd_file.strip_characters:
+ for c in r'\:*?"<>|':
+ name = name.replace(c, '')
+
+ if self.strip_forward_slash:
+ name = name.replace('/', '')
+ return name
+
+ def _destination(self, rpd_file: RPDFile, name: str) -> str:
+ # implement in subclass
+ return ''
+
+ def _filter_name(self, name: str, parts: bool) -> str:
+ # implement in subclass if need be
+ return name
+
+ def generate_name(self, rpd_file: RPDFile,
+ parts: Optional[bool]=False) -> Union[str, List[str]]:
+ """
+ Generate subfolder name(s), and photo/video filenames
+
+ :param rpd_file: rpd file for the name to generate
+ :param parts: if True, return string components in a list
+ :return: complete string or list of name components
+ """
+
+ self.rpd_file = rpd_file
+
+ if parts:
+ name = []
+ else:
+ name = ''
+
+ for self.L0, self.L1, self.L2 in self._get_values_from_pref_list():
+ v = self._get_component()
+ if parts:
+ name.append(self.filter_strip_characters(v))
+ elif v:
+ name += v
+
+ if not parts:
+ name = self.filter_strip_characters(name)
+ # strip any white space from the beginning and end of the name
+ name = name.strip()
+ elif name:
+ # likewise, strip any white space from the beginning and end of the name
+ name[0] = name[0].lstrip()
+ name[-1] = name[-1].rstrip()
+
+ if self.add_extension:
+ case = rpd_file.generate_extension_case
+ extension = os.path.splitext(rpd_file.name)[1]
+ if case == UPPERCASE:
+ extension = extension.upper()
+ elif case == LOWERCASE:
+ extension = extension.lower()
+ if parts:
+ name.append(extension)
+ else:
+ name += extension
+
+ self._get_thm_extension()
+ self._get_audio_extension()
+ self._get_xmp_extension()
+
+ name = self._filter_name(name, parts)
+
+ if self.problem.has_error():
+
+ rpd_file.name_generation_problem = True
+
+ if self.problems is not None:
+ self.problem.destination = self._destination(rpd_file=rpd_file, name=name)
+ self.problem.file_type = rpd_file.title
+ self.problem.source = rpd_file.get_souce_href()
+ self.problems.append(self.problem)
+
+ return name
+
+
+class PhotoName(NameGeneration):
+ """
+ Generate filenames for photos
+ """
+ def __init__(self, pref_list: List[str],
+ problems: Optional[RenamingProblems]=None) -> None:
+ super().__init__(pref_list, problems)
+
+ self.problem = FilenameNotFullyGeneratedProblem()
+
+ self.strip_forward_slash = True
+ self.add_extension = True
+ self.L1_date_check = IMAGE_DATE # used in _get_date_component()
+
+ def _destination(self, rpd_file: RPDFile, name: str) -> str:
+ if rpd_file.download_subfolder:
+ return make_href(
+ name=name,
+ uri=get_uri(
+ full_file_name=os.path.join(
+ rpd_file.download_folder, rpd_file.download_subfolder, name
+ )
+ )
+ )
+ else:
+ return name
+
+
+class VideoName(PhotoName):
+ """
+ Generate filenames for videos
+ """
+ def __init__(self, pref_list: List[str],
+ problems: Optional[RenamingProblems]=None) -> None:
+
+ super().__init__(pref_list, problems)
+
+ self.L1_date_check = VIDEO_DATE # used in _get_date_component()
+
+ def _get_metadata_component(self):
+ """
+ Returns portion of video / subfolder name based on the metadata
+
+ Note: date time metadata found in _getDateComponent()
+ """
+ return get_video_metadata_component(self)
+
+
+class PhotoSubfolder(NameGeneration):
+ """
+ Generate subfolder names for photo files
+ """
+
+ def __init__(self, pref_list: List[str],
+ problems: Optional[RenamingProblems]=None,
+ no_metadata: Optional[bool]=False) -> None:
+ """
+ :param pref_list: subfolder generation preferences list
+ :param no_metadata: if True, halt as soon as the need for metadata
+ or a job code or sequence number becomes necessary
+ """
+
+ super().__init__(pref_list, problems)
+
+ if no_metadata:
+ self.pref_list = truncate_before_unwanted_subfolder_component(pref_list)
+ else:
+ self.pref_list = pref_list
+
+ self.no_metadata = no_metadata
+
+ self.problem = FolderNotFullyGeneratedProblemProblem()
+
+ self.strip_extraneous_white_space = re.compile(r'\s*%s\s*' % os.sep)
+ self.strip_forward_slash = False
+ self.add_extension = False
+ self.L1_date_check = IMAGE_DATE # used in _get_date_component()
+
+ def _filter_name(self, name: str, parts: bool) -> str:
+ if not parts:
+ return self.filter_subfolder_characters(name)
+ return name
+
+ def _destination(self, rpd_file: RPDFile, name: str) -> str:
+ return make_href(
+ name=name,
+ uri = get_uri(path=os.path.join(rpd_file.download_folder, name))
+ )
+
+ def filter_subfolder_characters(self, subfolders: str) -> str:
+ """
+ Remove unwanted characters specific to the generation of subfolders
+ :param subfolders: the complete string containing the subfolders
+ (not component parts)
+ :return: filtered string
+ """
+
+ # subfolder value must never start with a separator, or else any
+ # os.path.join function call will fail to join a subfolder to its
+ # parent folder
+ if subfolders:
+ if subfolders[0] == os.sep:
+ subfolders = subfolders[1:]
+
+ # remove any spaces before and after a directory name
+ if subfolders and self.rpd_file.strip_characters:
+ subfolders = self.strip_extraneous_white_space.sub(os.sep, subfolders)
+
+ # remove any repeated directory separators
+ double_sep = os.sep * 2
+ subfolders = subfolders.replace(double_sep, os.sep)
+
+ # remove any trailing directory separators
+ while subfolders.endswith(os.sep):
+ subfolders = subfolders[:-1]
+
+ return subfolders
+
+
+class VideoSubfolder(PhotoSubfolder):
+ """
+ Generate subfolder names for video files
+ """
+
+ def __init__(self, pref_list: List[str],
+ problems: Optional[RenamingProblems] = None,
+ no_metadata: bool=False) -> None:
+ """
+ :param pref_list: subfolder generation preferences list
+ :param no_metadata: if True, halt as soon as the need for metadata
+ or a job code or sequence number becomes necessary
+ """
+ super().__init__(pref_list, problems, no_metadata)
+ self.L1_date_check = VIDEO_DATE # used in _get_date_component()
+
+
+ def _get_metadata_component(self):
+ """
+ Returns portion of video / subfolder name based on the metadata
+
+ Note: date time metadata found in _getDateComponent()
+ """
+ return get_video_metadata_component(self)
+
+
+def truncate_before_unwanted_subfolder_component(pref_list: List[str]) -> List[str]:
+ r"""
+ truncate the preferences list to remove any subfolder element that
+ contains a metadata or a job code or sequence number
+
+ :param pref_list: subfolder prefs list
+ :return: truncated list
+
+ >>> print(truncate_before_unwanted_subfolder_component(PHOTO_SUBFOLDER_MENU_DEFAULTS_CONV[0]))
+ ['Date time', 'Image date', 'YYYY', '/', '', '', 'Date time', 'Image date', 'YYYYMMDD']
+ >>> print(truncate_before_unwanted_subfolder_component(PHOTO_SUBFOLDER_MENU_DEFAULTS_CONV[1]))
+ ['Date time', 'Image date', 'YYYY', '/', '', '', 'Date time', 'Image date', 'YYYY-MM-DD']
+ >>> print(truncate_before_unwanted_subfolder_component(PHOTO_SUBFOLDER_MENU_DEFAULTS_CONV[2]))
+ ['Date time', 'Image date', 'YYYY', '/', '', '', 'Date time', 'Image date', 'YYYY_MM_DD']
+ >>> print(truncate_before_unwanted_subfolder_component(PHOTO_SUBFOLDER_MENU_DEFAULTS_CONV[3]))
+ ['Date time', 'Image date', 'YYYY']
+ >>> print(truncate_before_unwanted_subfolder_component(PHOTO_SUBFOLDER_MENU_DEFAULTS_CONV[4]))
+ ... # doctest: +NORMALIZE_WHITESPACE
+ ['Date time', 'Image date', 'YYYY', '/', '', '', 'Date time', 'Image date', 'YYYY',
+ 'Date time', 'Image date', 'MM']
+ >>> print(truncate_before_unwanted_subfolder_component([JOB_CODE, '', '',]))
+ []
+ >>> pl = [DATE_TIME, IMAGE_DATE, LIST_DATE_TIME_L2[11]]
+ >>> print(truncate_before_unwanted_subfolder_component(pl))
+ ['Date time', 'Image date', 'YYYY']
+ """
+
+ rl = [pref_list[i] for i in range(0, len(pref_list), 3)]
+ truncate = -1
+ for idx, value in enumerate(rl):
+ if value in (METADATA, SEQUENCES, JOB_CODE):
+ break
+ if idx == len(rl) - 1:
+ truncate = idx + 1
+ elif value == SEPARATOR:
+ truncate = idx
+
+ if truncate >= 0:
+ return pref_list[:truncate * 3]
+ return []
+
+
+def get_video_metadata_component(video: Union[VideoSubfolder, VideoName]):
+ """
+ Returns portion of video / subfolder name based on the metadata
+
+ This is outside of a class definition because of the inheritance
+ hierarchy.
+ """
+
+ if video.L1 == CODEC:
+ v = video.rpd_file.metadata.codec()
+ elif video.L1 == WIDTH:
+ v = video.rpd_file.metadata.width()
+ elif video.L1 == HEIGHT:
+ v = video.rpd_file.metadata.height()
+ elif video.L1 == FPS:
+ v = video.rpd_file.metadata.frames_per_second()
+ elif video.L1 == LENGTH:
+ v = video.rpd_file.metadata.length()
+ else:
+ raise TypeError("Invalid metadata option specified")
+ if video.L1 in [CODEC]:
+ if video.L2 == UPPERCASE:
+ v = v.upper()
+ elif video.L2 == LOWERCASE:
+ v = v.lower()
+ if not v:
+ video.problem.missing_metadata.append(_(video.L1))
+ return v
+
+
+class Sequences:
+ """
+ Stores sequence numbers and letters used in generating file names.
+ """
+
+ def __init__(self, downloads_today_tracker: DownloadsTodayTracker,
+ stored_sequence_no: int):
+ self.session_sequence_no = 0
+ self.sequence_letter = -1
+ self.downloads_today_tracker = downloads_today_tracker
+ self.stored_sequence_no = stored_sequence_no
+ self.matched_sequences = None
+
+ def set_matched_sequence_value(self, matched_sequences: MatchedSequences) -> None:
+ self.matched_sequences = matched_sequences
+
+ def get_session_sequence_no(self) -> int:
+ if self.matched_sequences is not None:
+ return self.matched_sequences.session_sequence_no
+ else:
+ return self._get_session_sequence_no()
+
+ def _get_session_sequence_no(self) -> int:
+ return self.session_sequence_no + 1
+
+ def get_sequence_letter(self) -> int:
+ if self.matched_sequences is not None:
+ return self.matched_sequences.sequence_letter
+ else:
+ return self._get_sequence_letter()
+
+ def _get_sequence_letter(self) -> int:
+ return self.sequence_letter + 1
+
+ def increment(self, uses_session_sequence_no, uses_sequence_letter) -> None:
+ if uses_session_sequence_no:
+ self.session_sequence_no += 1
+ if uses_sequence_letter:
+ self.sequence_letter += 1
+
+ def get_downloads_today(self) -> int:
+ if self.matched_sequences is not None:
+ return self.matched_sequences.downloads_today
+ else:
+ return self._get_downloads_today()
+
+ def _get_downloads_today(self) -> int:
+ v = self.downloads_today_tracker.get_downloads_today()
+ if v == -1:
+ return 1
+ else:
+ return v + 1
+
+ def get_stored_sequence_no(self) -> int:
+ if self.matched_sequences is not None:
+ return self.matched_sequences.stored_sequence_no
+ else:
+ return self._get_stored_sequence_no()
+
+ def _get_stored_sequence_no(self) -> int:
+ return self.stored_sequence_no
+
+ def create_matched_sequences(self) -> MatchedSequences:
+ return MatchedSequences(
+ session_sequence_no=self._get_session_sequence_no(),
+ sequence_letter=self._get_sequence_letter(),
+ downloads_today=self._get_downloads_today(),
+ stored_sequence_no=self._get_stored_sequence_no())