diff options
Diffstat (limited to 'rapid/scan.py')
| -rwxr-xr-x | rapid/scan.py | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/rapid/scan.py b/rapid/scan.py deleted file mode 100755 index e55f43d..0000000 --- a/rapid/scan.py +++ /dev/null @@ -1,170 +0,0 @@ -#!/usr/bin/python -# -*- coding: latin1 -*- - -### Copyright (C) 2011 Damon Lynch <damonlynch@gmail.com> - -### This program 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 2 of the License, or -### (at your option) any later version. - -### This program 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 this program; if not, write to the Free Software -### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -import os -import multiprocessing - -import gio -import gtk - -import pyexiv2 - -import rpdmultiprocessing as rpdmp -import rpdfile - - -import logging -logger = multiprocessing.get_logger() - -# python whitespace is significant - don't remove the leading whitespace on -# the second line - -file_attributes = "standard::name,standard::display-name,\ -standard::type,standard::size,time::modified,access::can-read,id::file" - - - -class Scan(multiprocessing.Process): - - """Scans the given path for files of a specified type. - - Returns results in batches, finishing with a total of the size of all the - files in bytes. - """ - - def __init__(self, path, batch_size, generate_folder, results_pipe, - terminate_queue, run_event): - - """Setup values needed to conduct the scan. - - 'path' is a string of the path to be scanned, which is passed to gio. - - 'batch_size' is the number of files that should be sent back to the - calling function at one time. - - 'results_pipe' is a connection on which to send the results. - - 'terminate_queue' is a queue whose sole purpose is to notify the - process that it should terminate and not return any results. - - 'run_event' is an Event that is used to temporarily halt execution. - - """ - - multiprocessing.Process.__init__(self) - self.path = path - self.results_pipe = results_pipe - self.terminate_queue = terminate_queue - self.run_event = run_event - self.batch_size = batch_size - self.generate_folder = generate_folder - self.counter = 0 - self.files = [] - self.file_type_counter = rpdfile.FileTypeCounter() - - - def _gio_scan(self, path, file_size_sum): - """recursive function to scan a directory and its subdirectories - for photos and possibly videos""" - - children = path.enumerate_children(file_attributes) - - for child in children: - - # pause if instructed by the caller - self.run_event.wait() - - if not self.terminate_queue.empty(): - x = self.terminate_queue.get() - # terminate immediately - logger.info("terminating scan...") - self.files = [] - return None - - # only collect files and scan in directories we can actually read - # cannot assume that users will download only from memory cards - - if child.get_attribute_boolean(gio.FILE_ATTRIBUTE_ACCESS_CAN_READ): - file_type = child.get_file_type() - name = child.get_name() - if file_type == gio.FILE_TYPE_DIRECTORY: - file_size_sum = self._gio_scan(path.get_child(name), - file_size_sum) - if file_size_sum is None: - return None - - elif file_type == gio.FILE_TYPE_REGULAR: - ext = os.path.splitext(name)[1].lower()[1:] - - file_type = rpdfile.file_type(ext) - if file_type is not None: - # count how many files of each type are included - # e.g. photo, video - self.file_type_counter.add(file_type) - self.counter += 1 - display_name = child.get_display_name() - size = child.get_size() - modification_time = child.get_modification_time() - file_id = child.get_attribute_string( - gio.FILE_ATTRIBUTE_ID_FILE) - scanned_file = rpdfile.get_rpdfile(ext, - name, - display_name, - path.get_path(), - size, - modification_time, - self.pid, - file_id) - - if self.generate_folder: - # this dramatically slows scanning speed, and it - # is unlikely this will be called this early in the - # workflow - scanned_file.read_metadata() - - self.files.append(scanned_file) - - if self.counter == self.batch_size: - # send batch of results - self.results_pipe.send((rpdmp.CONN_PARTIAL, - self.files)) - self.files = [] - self.counter = 0 - - file_size_sum += size - - return file_size_sum - - - def run(self): - """start the actual scan.""" - source = gio.File(self.path) - try: - size = self._gio_scan(source, 0) - except gio.Error, inst: - logger.error("Error while scanning %s: %s", self.path, inst) - size = None - - if size is not None: - if self.counter > 0: - # send any remaining results - self.results_pipe.send((rpdmp.CONN_PARTIAL, self.files)) - self.results_pipe.send((rpdmp.CONN_COMPLETE, (size, - self.file_type_counter, self.pid))) - self.results_pipe.close() |