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Update Interface Demo plugin to use new DB API

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This commit is contained in:
Kovid Goyal 2015-09-01 17:31:51 +05:30
parent 8d9db8969d
commit 1711ea048e
1 changed files with 18 additions and 29 deletions
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47
manual/plugin_examples/interface_demo/main.py
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@ -25,9 +25,10 @@ class DemoDialog(QDialog):
self.do_user_config = do_user_config
# The current database shown in the GUI
# db is an instance of the class LibraryDatabase2 from database.py
# db is an instance of the class LibraryDatabase from db/legacy.py
# This class has many, many methods that allow you to do a lot of
# things.
# things. For most purposes you should use db.new_api, which has
# a much nicer interface from db/cache.py
self.db = gui.current_db
self.l = QVBoxLayout()
@ -81,15 +82,11 @@ class DemoDialog(QDialog):
def marked(self):
''' Show books with only one format '''
fmt_idx = self.db.FIELD_MAP['formats']
matched_ids = set()
for record in self.db.data.iterall():
# Iterate over all records
fmts = record[fmt_idx]
# fmts is either None or a comma separated list of formats
if fmts and ',' not in fmts:
matched_ids.add(record[0])
db = self.db.new_api
matched_ids = {book_id for book_id in db.all_book_ids() if len(db.formats(book_id)) == 1}
# Mark the records with the matching ids
# new_api does not know anything about marked books, so we use the full
# db object
self.db.set_marked_ids(matched_ids)
# Tell the GUI to search for all marked records
@ -99,22 +96,17 @@ class DemoDialog(QDialog):
def view(self):
''' View the most recently added book '''
most_recent = most_recent_id = None
timestamp_idx = self.db.FIELD_MAP['timestamp']
for record in self.db.data:
# Iterate over all currently showing records
timestamp = record[timestamp_idx]
db = self.db.new_api
for book_id, timestamp in db.all_field_for('timestamp', db.all_book_ids()).iteritems():
if most_recent is None or timestamp > most_recent:
most_recent = timestamp
most_recent_id = record[0]
most_recent_id = book_id
if most_recent_id is not None:
# Get the row number of the id as shown in the GUI
row_number = self.db.row(most_recent_id)
# Get a reference to the View plugin
view_plugin = self.gui.iactions['View']
# Ask the view plugin to launch the viewer for row_number
view_plugin._view_books([row_number])
view_plugin._view_calibre_books([most_recent_id])
def update_metadata(self):
'''
@ -131,29 +123,26 @@ class DemoDialog(QDialog):
'No books selected', show=True)
# Map the rows to book ids
ids = list(map(self.gui.library_view.model().id, rows))
db = self.db.new_api
for book_id in ids:
# Get the current metadata for this book from the db
mi = self.db.get_metadata(book_id, index_is_id=True,
get_cover=True, cover_as_data=True)
fmts = self.db.formats(book_id, index_is_id=True)
mi = db.get_metadata(book_id, get_cover=True, cover_as_data=True)
fmts = db.formats(book_id)
if not fmts:
continue
for fmt in fmts.split(','):
for fmt in fmts:
fmt = fmt.lower()
# Get a python file object for the format. This will be either
# an in memory file or a temporary on disk file
ffile = self.db.format(book_id, fmt, index_is_id=True,
as_file=True)
ffile = db.format(book_id, fmt, as_file=True)
ffile.seek(0)
# Set metadata in the format
set_metadata(ffile, mi, fmt)
ffile.seek(0)
# Now replace the file in the calibre library with the updated
# file. We dont use add_format_with_hooks as the hooks were
# already run when the file was first added to calibre.
ffile.name = 'xxx' # add_format() will not work if the file
# path of the file being added is the same
# as the path of the file being replaced
self.db.add_format(book_id, fmt, ffile, index_is_id=True)
db.add_format(book_id, fmt, ffile, run_hooks=False)
info_dialog(self, 'Updated files',
'Updated the metadata in the files of %d book(s)'%len(ids),