193 lines
6.6 KiB
Python
193 lines
6.6 KiB
Python
import argparse
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import os
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import sqlite3
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import sys
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import etiquette.photodb
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def upgrade_1_to_2(sql):
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'''
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In this version, a column `tagged_at` was added to the Photos table, to keep
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track of the last time the photo's tags were edited (added or removed).
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'''
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cur = sql.cursor()
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cur.execute('ALTER TABLE photos ADD COLUMN tagged_at INT')
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def upgrade_2_to_3(sql):
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'''
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Preliminary support for user account management was added. This includes a `user` table
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with id, username, password hash, and a timestamp.
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Plus some indices.
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'''
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cur = sql.cursor()
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cur.execute('''
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CREATE TABLE IF NOT EXISTS users(
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id TEXT,
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username TEXT COLLATE NOCASE,
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password BLOB,
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created INT
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)
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''')
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cur.execute('CREATE INDEX IF NOT EXISTS index_user_id ON users(id)')
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cur.execute('CREATE INDEX IF NOT EXISTS index_user_username ON users(username COLLATE NOCASE)')
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def upgrade_3_to_4(sql):
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'''
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Add an `author_id` column to Photos.
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'''
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cur = sql.cursor()
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cur.execute('ALTER TABLE photos ADD COLUMN author_id TEXT')
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cur.execute('CREATE INDEX IF NOT EXISTS index_photo_author ON photos(author_id)')
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def upgrade_4_to_5(sql):
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'''
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Add table `bookmarks` and its indices.
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'''
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cur = sql.cursor()
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cur.execute('''
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CREATE TABLE IF NOT EXISTS bookmarks(
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id TEXT,
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title TEXT,
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url TEXT,
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author_id TEXT
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)
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''')
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cur.execute('CREATE INDEX IF NOT EXISTS index_bookmark_id ON bookmarks(id)')
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cur.execute('CREATE INDEX IF NOT EXISTS index_bookmark_author ON bookmarks(author_id)')
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def upgrade_5_to_6(sql):
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'''
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When Albums were first introduced, they shared the ID counter and
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relationship table with tags, because they were mostly identical at the time.
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However this is very ugly and confusing and it's time to finally change it.
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- Renames old indices `index_grouprel_*` to `index_taggroup_*`
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- Creates new indices `index_albumgroup_*`
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- Creates new table `album_group_rel`
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- Moves all album group relationships out of `tag_group_rel` and
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into `album_group_rel`
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- Gives albums their own last_id value, starting with the current tag value.
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'''
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# 1. Start the id_numbers.albums value at the tags value so that the number
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# can continue to increment safely and separately, instead of starting at
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# zero and bumping into existing albums.
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cur = sql.cursor()
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cur.execute('SELECT * FROM id_numbers WHERE tab == "tags"')
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last_id = cur.fetchone()[1]
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cur.execute('INSERT INTO id_numbers VALUES("albums", ?)', [last_id])
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# 2. Now's a good chance to rename 'index_grouprel' to 'index_taggroup'.
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cur.execute('DROP INDEX index_grouprel_parentid')
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cur.execute('DROP INDEX index_grouprel_memberid')
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cur.execute('CREATE INDEX index_taggroup_parentid ON tag_group_rel(parentid)')
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cur.execute('CREATE INDEX index_taggroup_memberid ON tag_group_rel(memberid)')
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# 3. All of the album group relationships need to be moved into their
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# own table, out of tag_group_rel
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cur.execute('CREATE TABLE album_group_rel(parentid TEXT, memberid TEXT)')
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cur.execute('CREATE INDEX index_albumgroup_parentid ON album_group_rel(parentid)')
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cur.execute('CREATE INDEX index_albumgroup_memberid ON album_group_rel(memberid)')
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cur.execute('SELECT id FROM albums')
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album_ids = [f[0] for f in cur.fetchall()]
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for album_id in album_ids:
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cur.execute(
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'SELECT * FROM tag_group_rel WHERE parentid == ? OR memberid == ?',
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[album_id, album_id]
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)
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f = cur.fetchall()
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if f == []:
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continue
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for grouprel in f:
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cur.execute('INSERT INTO album_group_rel VALUES(?, ?)', grouprel)
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cur.execute(
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'DELETE FROM tag_group_rel WHERE parentid == ? OR memberid == ?',
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[album_id, album_id]
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)
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def upgrade_6_to_7(sql):
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'''
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Most of the indices were renamed, so delete them and let them regenerate
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next time.
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Albums lost their `associated_directory` column, and it has been moved to a
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separate table `album_associated_directories`, so that we can have albums
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which load from multiple directories.
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'''
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cur = sql.cursor()
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cur.execute('SELECT name FROM sqlite_master WHERE type == "index"')
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indices = [x[0] for x in cur.fetchall()]
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for index in indices:
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cur.execute('DROP INDEX %s' % index)
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cur.execute('''
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CREATE TABLE album_associated_directories(
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albumid TEXT,
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directory TEXT COLLATE NOCASE
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)''')
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cur.execute('ALTER TABLE albums RENAME TO deleting_albums')
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cur.execute('''
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CREATE TABLE albums(
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id TEXT,
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title TEXT,
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description TEXT
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)''')
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cur.execute('INSERT INTO albums SELECT id, title, description FROM deleting_albums')
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cur.execute('''
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INSERT INTO album_associated_directories
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SELECT id, associated_directory
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FROM deleting_albums
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WHERE associated_directory IS NOT NULL
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''')
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cur.execute('DROP TABLE deleting_albums')
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def upgrade_7_to_8(sql):
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'''
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Give the Tags table a description field.
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'''
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cur = sql.cursor()
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cur.execute('ALTER TABLE tags ADD COLUMN description TEXT')
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def upgrade_all(database_filename):
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'''
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Given the filename of a phototagger database, apply all of the needed
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upgrade_x_to_y functions in order.
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'''
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if not os.path.isfile(database_filename):
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raise FileNotFoundError(database_filename)
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sql = sqlite3.connect(database_filename)
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cur = sql.cursor()
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cur.execute('PRAGMA user_version')
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current_version = cur.fetchone()[0]
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needed_version = etiquette.photodb.DATABASE_VERSION
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if current_version == needed_version:
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print('Already up-to-date with version %d.' % needed_version)
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return
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for version_number in range(current_version + 1, needed_version + 1):
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print('Upgrading from %d to %d' % (current_version, version_number))
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upgrade_function = 'upgrade_%d_to_%d' % (current_version, version_number)
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upgrade_function = eval(upgrade_function)
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upgrade_function(sql)
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sql.cursor().execute('PRAGMA user_version = %d' % version_number)
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sql.commit()
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current_version = version_number
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print('Upgrades finished.')
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def upgrade_all_argparse(args):
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return upgrade_all(database_filename=args.database_filename)
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def main(argv):
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parser = argparse.ArgumentParser()
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parser.add_argument('database_filename')
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parser.set_defaults(func=upgrade_all_argparse)
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args = parser.parse_args(argv)
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args.func(args)
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if __name__ == '__main__':
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main(sys.argv[1:])
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