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geopunt4QgisDataCatalog.py
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geopunt4QgisDataCatalog.py
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from qgis.PyQt.QtCore import (Qt, QSettings, QTranslator, QCoreApplication)
from qgis.PyQt.QtWidgets import (QDialog, QPushButton, QDialogButtonBox,
QInputDialog, QSizePolicy)
from qgis.PyQt.QtGui import QStandardItem, QStandardItemModel
from .ui_geopunt4QgisDataCatalog import Ui_geopunt4QgisDataCatalogDlg
from qgis.core import Qgis, QgsProject, QgsRasterLayer, QgsVectorLayer
from qgis.gui import QgsMessageBar
from .geopunt.metadataParser import (getWmsLayerNames, getWFSLayerNames, get_ogc_api_collections,
getWCSlayerNames, makeWFSuri, makeWCSuri, makeOGCAPIuri)
from .geopunt.datavindPlaats import datavindPlaats
from .tools.geometry import geometryHelper
import os, webbrowser, sys
class geopunt4QgisDataCatalog(QDialog):
def __init__(self, iface):
QDialog.__init__(self, None)
self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint)
self.iface = iface
# initialize locale
locale = QSettings().value("locale/userLocale", "en")
if not locale: locale = 'en'
else: locale = locale[0:2]
localePath = os.path.join(os.path.dirname(__file__), 'i18n', 'geopunt4qgis_{}.qm'.format(locale))
if os.path.exists(localePath):
self.translator = QTranslator()
self.translator.load(localePath)
QCoreApplication.installTranslator(self.translator)
self._initGui()
def _initGui(self):
"""setup the user interface"""
self.ui = Ui_geopunt4QgisDataCatalogDlg()
self.ui.setupUi(self)
# get settings
self.s = QSettings()
self.dvp = datavindPlaats()
self.gh = geometryHelper(self.iface)
# setup a message bar
self.bar = QgsMessageBar()
self.bar.setSizePolicy( QSizePolicy.Minimum, QSizePolicy.Fixed)
self.ui.verticalLayout.addWidget(self.bar)
self.ui.buttonBox.addButton(QPushButton("Sluiten"), QDialogButtonBox.RejectRole)
for btn in self.ui.buttonBox.buttons():
btn.setAutoDefault(0)
# vars
self.firstShow = True
self.bronnen = None
self.resultModel = QStandardItemModel(self)
self.ui.resultView.setModel(self.resultModel)
# eventhandlers
self.ui.zoekBtn.clicked.connect(self.onZoekClicked)
self.ui.addWMSbtn.clicked.connect(self.addWMS)
self.ui.addWFSbtn.clicked.connect(self.addWFS)
self.ui.addWCSbtn.clicked.connect(self.addWCS)
self.ui.ogcAPIbtn.clicked.connect(self.add_ogcapi)
self.ui.resultView.clicked.connect(self.resultViewClicked)
self.ui.buttonBox.helpRequested.connect(lambda: webbrowser.open_new_tab(
"https://www.vlaanderen.be/geopunt/plug-ins/qgis-plug-in/functionaliteiten-qgis-plug-in/geopunt-catalogus-in-qgis"))
self.finished.connect(self.clean)
def _setModel(self, records):
self.resultModel.clear()
# records = sorted(records, key=lambda k: k['title'])
for rec in records:
title = QStandardItem(rec['title']) # 0
identifier = QStandardItem(rec["identifier"]) # 1
description = QStandardItem(rec["description"]) # 2
date_modified = QStandardItem(rec["modified"]) # 3
accessRights = QStandardItem(rec["accessRights"]) # 4
self.resultModel.appendRow([title,identifier,description,date_modified,accessRights])
def show(self):
QDialog.show(self)
self.setWindowModality(0)
if self.firstShow:
self.firstShow = False
# eventhandlers
def resultViewClicked(self):
self.wms = self.wfs = self.wcs = self.ogcfeats = None
if self.ui.resultView.selectedIndexes():
row = self.ui.resultView.selectedIndexes()[0].row()
title = self.resultModel.data(self.resultModel.index(row, 0))
identifier = self.resultModel.data(self.resultModel.index(row, 1))
abstract = self.resultModel.data(self.resultModel.index(row, 2))
msg = f"""<h2>{title}</h2>
<div>{abstract}</div><br/>"""
links = self.dvp.findLinks(identifier)
if len(links):
msg += '<div>Links:</div><br/>'
for link in links:
name = link['name']
url = link['url']
urltype = link['type']
if urltype == 'wms':
self.wms = url
self.ui.addWMSbtn.setEnabled(1)
else:
self.ui.addWMSbtn.setEnabled(0)
if urltype == 'wfs':
self.wfs = url
self.ui.addWFSbtn.setEnabled(1)
else:
self.ui.addWFSbtn.setEnabled(0)
if urltype == 'wcs':
self.wcs = url
self.ui.addWCSbtn.setEnabled(1)
else:
self.ui.addWCSbtn.setEnabled(0)
if urltype == 'ogc-api':
self.ogcfeats = url
self.ui.ogcAPIbtn.setEnabled(1)
else:
self.ui.ogcAPIbtn.setEnabled(0)
msg += f"<a target='_blank' href='{url}'>{name}</a> ({urltype})<br/>"
msg += f"""<div>
<a href='https://metadata.vlaanderen.be/srv/dut/catalog.search#/metadata/{identifier}'>
Ga naar metadata fiche</a></div>"""
self.ui.descriptionText.setText(msg)
def onZoekClicked(self):
self.zoek = self.ui.zoekTxt.text()
dataType = None
if self.ui.typeCbx.currentText() == 'Service' :
dataType = 'type/service'
elif self.ui.typeCbx.currentText() == 'Dataset' :
dataType = 'type/dataset'
data = self.dvp.findAllItems(self.zoek, taxonomy=dataType)
self.parse_searchResults(data)
def parse_searchResults(self, data):
if len(data) == 0:
self.bar.pushMessage(
QCoreApplication.translate("geopunt4QgisPoidialog", "Waarschuwing "),
QCoreApplication.translate("geopunt4QgisPoidialog",
"Er werden geen resultaten gevonde voor deze zoekopdracht"), duration=5)
return
self.ui.countLbl.setText(f"Aantal gevonden: {len(data)}" )
self.ui.descriptionText.setText('')
self._setModel( data )
def addWMS(self):
if self.wms is None: return
lyrs = getWmsLayerNames(self.wms)
if len(lyrs) == 0:
self.bar.pushMessage("WMS",
QCoreApplication.translate("geopunt4QgisDataCatalog",
f"Kan geen lagen vinden in: {self.wms}" ),
level=Qgis.Warning, duration=10)
return
elif len(lyrs) == 1:
layerTitle = lyrs[0][1]
layerName = lyrs[0][0]
else:
layerTitle, accept = QInputDialog.getItem(self, "WMS toevoegen",
"Kies een laag om toe te voegen", [n[1] for n in lyrs], editable=0)
if not accept: return
layerName = [n[0] for n in lyrs if n[1] == layerTitle][0]
crs = self.gh.getGetMapCrs(self.iface).authid()
if crs != 'EPSG:31370' or crs != 'EPSG:3857' or crs != 'EPSG:3043':
crs = 'EPSG:31370'
url = self.wms.split('?')[0]
if crs != 'EPSG:31370' or crs != 'EPSG:3857': crs = 'EPSG:31370'
wmsUrl = f"contextualWMSLegend=0&dpiMode=7&url={url}&layers={layerName}&styles=&format=image/png&crs={crs}"
rlayer = QgsRasterLayer(wmsUrl, layerTitle, 'wms')
if rlayer.isValid():
QgsProject.instance().addMapLayer(rlayer)
else:
self.bar.pushMessage("Error",
QCoreApplication.translate("geopunt4QgisDataCatalog", "Kan WMS niet laden"),
level=Qgis.Critical, duration=10)
def addWFS(self):
if self.wfs is None: return
lyrs, version = getWFSLayerNames(self.wfs)
if len(lyrs) == 0:
self.bar.pushMessage("WFS",
QCoreApplication.translate("geopunt4QgisDataCatalog",
"Kan geen lagen vinden in: %s" % self.wfs), level=Qgis.Warning, duration=10)
return
elif len(lyrs) == 1:
layerName = lyrs[0][0]
layerTitle = lyrs[0][1]
else:
layerTitle, accept = QInputDialog.getItem(self, "WFS toevoegen",
"Kies een laag om toe te voegen", [n[1] for n in lyrs], editable=0)
if not accept:
return
layerName = [n[0] for n in lyrs if n[1] == layerTitle][0]
crs = [n[2] for n in lyrs if n[0] == layerName][0]
wfsUri = makeWFSuri(self.wfs, layerName, srsname=crs, version=version )
try:
vlayer = QgsVectorLayer(wfsUri, layerTitle, "WFS")
QgsProject.instance().addMapLayer(vlayer)
except:
self.bar.pushMessage("Error", str(sys.exc_info()[1]), level=Qgis.Critical, duration=10)
return
def addWCS(self):
if self.wcs is None: return
lyrs = getWCSlayerNames(self.wcs)
if len(lyrs) == 0:
self.bar.pushMessage("WCS",
QCoreApplication.translate("geopunt4QgisDataCatalog",
"Kan geen lagen vinden in: %s" % self.wcs), level=Qgis.Warning, duration=10)
return
elif len(lyrs) == 1:
layerName = lyrs[0][0]
layerTitle = lyrs[0][1]
else:
layerTitle, accept = QInputDialog.getItem(self, "WCS toevoegen",
"Kies een laag om toe te voegen", [n[1] for n in lyrs], editable=0)
if not accept:
return
layerName = [n[0] for n in lyrs if n[1] == layerTitle][0]
format = [n[2] for n in lyrs if n[0] == layerName][0]
url = self.wcs.split('?')[0]
wcsUri = makeWCSuri(url, layerName, format=format)
try:
vlayer = QgsRasterLayer(wcsUri, layerTitle, "wcs")
QgsProject.instance().addMapLayer(vlayer)
except:
self.bar.pushMessage("Error", str(sys.exc_info()[1]), level=Qgis.Critical, duration=10)
return
def add_ogcapi(self):
if self.ogcfeats is None: return
lyrs = get_ogc_api_collections(self.ogcfeats)
if len(lyrs) == 0:
self.bar.pushMessage("OGC-API",
QCoreApplication.translate("geopunt4QgisDataCatalog",
"Kan geen lagen vinden in: %s" % self.ogcfeats), level=Qgis.Warning, duration=10)
return
elif len(lyrs) == 1:
layerName = lyrs[0][0]
layerTitle = lyrs[0][1]
else:
layerTitle, accept = QInputDialog.getItem(self, "OGC laag toevoegen",
"Kies een laag om toe te voegen", [n[1] for n in lyrs], editable=0)
if not accept:
return
layerName = [n[0] for n in lyrs if n[1] == layerTitle][0]
ogcUri = makeOGCAPIuri(self.ogcfeats, layerName)
print(ogcUri)
try:
vlayer = QgsVectorLayer(ogcUri, layerTitle, "OAPIF")
QgsProject.instance().addMapLayer(vlayer)
except:
self.bar.pushMessage("Error", str(sys.exc_info()[1]), level=Qgis.Critical, duration=10)
return
def clean(self):
self.resultModel.clear()
self.wms = None
self.wfs = None
self.wcs = None
self.ogcfeats = None
self.ui.zoekTxt.clear()
self.ui.descriptionText.setText('')
self.ui.countLbl.setText("")
self.ui.msgLbl.setText("")
self.ui.addWMSbtn.setEnabled(0)
self.ui.addWFSbtn.setEnabled(0)
self.ui.addWMSbtn.setEnabled(0)