100 lines
2.8 KiB
Python
100 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
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import os
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import shutil
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import tempfile
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from anki import Collection
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from helpers.file_utils import FileUtils
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class CollectionUtils(object):
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"""
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Provides utility methods for creating, inspecting and manipulating anki
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collections.
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"""
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def __init__(self):
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self.collections_to_close = []
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self.fileutils = FileUtils()
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self.master_db_path = None
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def __create_master_col(self):
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"""
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Creates an empty master anki db that will be copied on each request
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for a new db. This is more efficient than initializing a new db each
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time.
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"""
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file_descriptor, file_path = tempfile.mkstemp(suffix=".anki2")
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os.close(file_descriptor)
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os.unlink(file_path) # We only need the file path.
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master_col = Collection(file_path)
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self.__mark_col_paths_for_deletion(master_col)
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master_col.db.close()
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self.master_db_path = file_path
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self.fileutils.mark_for_deletion(self.master_db_path)
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.clean_up()
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def __mark_collection_for_closing(self, collection):
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self.collections_to_close.append(collection)
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def __mark_col_paths_for_deletion(self, collection):
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"""
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Marks the paths of all the database files and directories managed by
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the collection for later deletion.
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"""
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self.fileutils.mark_for_deletion(collection.path)
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self.fileutils.mark_for_deletion(collection.media.dir())
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self.fileutils.mark_for_deletion(collection.media.col.path)
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def clean_up(self):
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"""
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Removes all files created by the Collection objects we issued and the
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master db file.
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"""
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# Close collections.
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for col in self.collections_to_close:
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col.close() # This also closes the media col.
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self.collections_to_close = []
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# Remove the files created by the collections.
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self.fileutils.clean_up()
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self.master_db_path = None
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def create_empty_col(self):
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"""
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Returns a Collection object using a copy of our master db file.
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"""
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if self.master_db_path is None:
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self.__create_master_col()
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file_descriptor, file_path = tempfile.mkstemp(suffix=".anki2")
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# Overwrite temp file with a copy of our master db.
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shutil.copy(self.master_db_path, file_path)
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collection = Collection(file_path)
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self.__mark_collection_for_closing(collection)
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self.__mark_col_paths_for_deletion(collection)
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return collection
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@staticmethod
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def create_col_from_existing_db(db_file_path):
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"""
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Returns a Collection object created from an existing anki db file.
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"""
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return Collection(db_file_path)
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