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# -*- coding: utf-8 -*-
###############################################################################
#
# CSW Client
# ---------------------------------------------------------
# QGIS Catalogue Service client.
#
# Copyright (C) 2010 NextGIS (http://nextgis.org),
# Alexander Bruy (alexander.bruy@gmail.com),
# Maxim Dubinin (sim@gis-lab.info)
#
# Copyright (C) 2014 Tom Kralidis (tomkralidis@gmail.com)
#
# This source 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 code 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
###############################################################################
import xml.etree.ElementTree as etree
from qgis.PyQt.QtCore import QSettings
from qgis.PyQt.QtWidgets import QDialog, QDialogButtonBox, QFileDialog, QListWidgetItem, QMessageBox
from MetaSearch.util import (get_connections_from_file, get_ui_class,
prettify_xml)
BASE_CLASS = get_ui_class('manageconnectionsdialog.ui')
class ManageConnectionsDialog(QDialog, BASE_CLASS):
"""manage connections"""
def __init__(self, mode):
"""init dialog"""
QDialog.__init__(self)
self.setupUi(self)
self.settings = QSettings()
self.filename = None
self.mode = mode # 0 - save, 1 - load
self.btnBrowse.clicked.connect(self.select_file)
self.manage_gui()
def manage_gui(self):
"""manage interface"""
if self.mode == 1:
self.label.setText(self.tr('Load from file'))
self.buttonBox.button(QDialogButtonBox.Ok).setText(self.tr('Load'))
else:
self.label.setText(self.tr('Save to file'))
self.buttonBox.button(QDialogButtonBox.Ok).setText(self.tr('Save'))
self.populate()
self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(False)
def select_file(self):
"""select file ops"""
label = self.tr('eXtensible Markup Language (*.xml *.XML)')
if self.mode == 0:
slabel = self.tr('Save connections')
self.filename = QFileDialog.getSaveFileName(self, slabel,
'.', label)
else:
slabel = self.tr('Load connections')
self.filename = QFileDialog.getOpenFileName(self, slabel,
'.', label)
if not self.filename:
return
# ensure the user never omitted the extension from the file name
if not self.filename.lower().endswith('.xml'):
self.filename = '%s.xml' % self.filename
self.leFileName.setText(self.filename)
if self.mode == 1:
self.populate()
self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(True)
def populate(self):
"""populate connections list from settings"""
if self.mode == 0:
self.settings.beginGroup('/MetaSearch/')
keys = self.settings.childGroups()
for key in keys:
item = QListWidgetItem(self.listConnections)
item.setText(key)
self.settings.endGroup()
else: # populate connections list from file
doc = get_connections_from_file(self, self.filename)
if doc is None:
self.filename = None
self.leFileName.clear()
self.listConnections.clear()
return
for csw in doc.findall('csw'):
item = QListWidgetItem(self.listConnections)
item.setText(csw.attrib.get('name'))
def save(self, connections):
"""save connections ops"""
doc = etree.Element('qgsCSWConnections')
doc.attrib['version'] = '1.0'
for conn in connections:
url = self.settings.value('/MetaSearch/%s/url' % conn)
if url is not None:
connection = etree.SubElement(doc, 'csw')
connection.attrib['name'] = conn
connection.attrib['url'] = url
# write to disk
with open(self.filename, 'w') as fileobj:
fileobj.write(prettify_xml(etree.tostring(doc)))
QMessageBox.information(self, self.tr('Save Connections'),
self.tr('Saved to %s') % self.filename)
self.reject()
def load(self, items):
"""load connections"""
self.settings.beginGroup('/MetaSearch/')
keys = self.settings.childGroups()
self.settings.endGroup()
exml = etree.parse(self.filename).getroot()
for csw in exml.findall('csw'):
conn_name = csw.attrib.get('name')
# process only selected connections
if conn_name not in items:
continue
# check for duplicates
if conn_name in keys:
label = self.tr('File %s exists. Overwrite?') % conn_name
res = QMessageBox.warning(self, self.tr('Loading Connections'),
label,
QMessageBox.Yes | QMessageBox.No)
if res != QMessageBox.Yes:
continue
# no dups detected or overwrite is allowed
url = '/MetaSearch/%s/url' % conn_name
self.settings.setValue(url, csw.attrib.get('url'))
def accept(self):
"""accept connections"""
selection = self.listConnections.selectedItems()
if len(selection) == 0:
return
items = []
for sel in selection:
items.append(sel.text())
if self.mode == 0: # save
self.save(items)
else: # load
self.load(items)
self.filename = None
self.leFileName.clear()
self.listConnections.clear()
self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(False)
def reject(self):
"""back out of manage connections dialogue"""
QDialog.reject(self)
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