def saveMetadata(layer, mefFilename=None, apiUrl=None, wms=None, wfs=None, layerName=None):
uuid = uuidForLayer(layer)
_, safe_name = getLayerTitleAndName(layer)
filename = tempFileInSubFolder(safe_name + ".qmd")
layer.saveNamedMetadata(filename)
thumbnail = _saveLayerThumbnail(layer)
apiUrl = apiUrl or ""
transformedFilename = _transformMetadata(filename, uuid, apiUrl, wms, wfs, layerName or safe_name)
mefFilename = mefFilename or tempFileInSubFolder(uuid + ".mef")
_createMef(uuid, transformedFilename, mefFilename, thumbnail)
return mefFilename
def publishStyle(self, layer):
lyr_title, lyr_name = lyr_utils.getLayerTitleAndName(layer)
export_layer = lyr_utils.getExportableLayer(layer, lyr_name)
style_filename = tempFileInSubFolder(lyr_name + ".zip")
warnings = saveLayerStyleAsZippedSld(export_layer, style_filename)
for w in warnings:
self.logWarning(w)
self.logInfo(f"Style for layer '{layer.name()}' exported as ZIP file to '{style_filename}'")
self._publishStyle(lyr_name, style_filename)
self._published_layers.add(layer)
return style_filename
def _transformMetadata(filename, uuid, api_url, wms, wfs, layer_name):
def _ns(n):
return f"{{http://www.isotc211.org/2005/gmd}}{n}"
def _addServiceElement(root_element, md_layer, service_url, service_type):
trans = ET.SubElement(root_element, _ns("transferOptions"))
dtrans = ET.SubElement(trans, _ns("MD_DigitalTransferOptions"))
online = ET.SubElement(dtrans, _ns("onLine"))
cionline = ET.SubElement(online, _ns("CI_OnlineResource"))
linkage = ET.SubElement(cionline, _ns("linkage"))
url = ET.SubElement(linkage, _ns("URL"))
url.text = service_url
protocol = ET.SubElement(cionline, _ns("protocol"))
cs = ET.SubElement(
protocol, "{http://www.isotc211.org/2005/gco}CharacterString")
cs.text = f"OGC:{service_type.upper()}"
name = ET.SubElement(cionline, _ns("name"))
csname = ET.SubElement(
name, "{http://www.isotc211.org/2005/gco}CharacterString")
csname.text = md_layer
iso_filename = tempFileInSubFolder("metadata.xml")
feedback.logInfo(f"Creating metadata export file {iso_filename}")
out_dom = _transformDom(filename, QMD_TO_ISO19139_XSLT)
for ident in out_dom.iter(_ns("fileIdentifier")):
ident[0].text = uuid
if wms is not None:
for root in out_dom.iter(_ns("MD_Distribution")):
_addServiceElement(root, layer_name, wms, "wms")
if wfs is not None:
for root in out_dom.iter(_ns("MD_Distribution")):
_addServiceElement(root, layer_name, wfs, "wfs")
for root in out_dom.iter(_ns("MD_DataIdentification")):
overview = ET.SubElement(root, _ns("graphicOverview"))
browse_graphic = ET.SubElement(overview, _ns("MD_BrowseGraphic"))
file = ET.SubElement(browse_graphic, _ns("fileName"))
cs = ET.SubElement(
file, "{http://www.isotc211.org/2005/gco}CharacterString")
thumbnail_url = f"{api_url}/records/{uuid}/attachments/thumbnail.png"
cs.text = thumbnail_url
_writeDom(out_dom, iso_filename)
return iso_filename
def _saveLayerThumbnail(layer):
filename = tempFileInSubFolder("thumbnail.png")
img = QImage(QSize(800, 800), QImage.Format_A2BGR30_Premultiplied)
color = QColor(255, 255, 255, 255)
img.fill(color.rgba())
p = QPainter()
p.begin(img)
p.setRenderHint(QPainter.Antialiasing)
ms = QgsMapSettings()
ms.setBackgroundColor(color)
ms.setLayers([layer])
ms.setExtent(layer.extent())
ms.setOutputSize(img.size())
render = QgsMapRendererCustomPainterJob(ms, p)
render.start()
render.waitForFinished()
p.end()
img.save(filename)
return filename
def exportLayer(layer,
fields=None,
to_shapefile=False,
path=None,
force=False,
logger=None):
logger = logger or feedback
filepath, _, ext = lyr_utils.getLayerSourceInfo(layer)
lyr_name, safe_name = lyr_utils.getLayerTitleAndName(layer)
fields = fields or []
if layer.type() == layer.VectorLayer:
if to_shapefile and (force or layer.fields().count() != len(fields)
or ext != EXT_SHAPEFILE):
# Export with Shapefile extension
ext = EXT_SHAPEFILE
elif force or ext != EXT_GEOPACKAGE or layer.fields().count() != len(fields) \
or not isSingleTableGpkg(filepath):
# Export with GeoPackage extension
ext = EXT_GEOPACKAGE
else:
# No need to export
logger.logInfo(
f"No need to export layer {lyr_name} stored at {filepath}")
return filepath
# Perform GeoPackage or Shapefile export
attrs = [
i for i, f in enumerate(layer.fields())
if len(fields) == 0 or f.name() in fields
]
output = path or tempFileInSubFolder(safe_name + ext)
encoding = "UTF-8"
driver = "ESRI Shapefile" if ext == EXT_SHAPEFILE else "GPKG"
options = None
if hasattr(QgsVectorFileWriter, 'SaveVectorOptions'):
# QGIS v3.x has the SaveVectorOptions object
options = QgsVectorFileWriter.SaveVectorOptions()
options.fileEncoding = encoding
options.attributes = attrs
options.driverName = driver
# Make sure that we are using the latest (non-deprecated) write method
if hasattr(QgsVectorFileWriter, 'writeAsVectorFormatV3'):
# Use writeAsVectorFormatV3 for QGIS versions >= 3.20 to avoid DeprecationWarnings
result = QgsVectorFileWriter.writeAsVectorFormatV3(
layer, output, QgsCoordinateTransformContext(),
options) # noqa
elif hasattr(QgsVectorFileWriter, 'writeAsVectorFormatV2'):
# Use writeAsVectorFormatV2 for QGIS versions >= 3.10.3 to avoid DeprecationWarnings
result = QgsVectorFileWriter.writeAsVectorFormatV2(
layer, output, QgsCoordinateTransformContext(),
options) # noqa
else:
# Use writeAsVectorFormat for QGIS versions < 3.10.3 for backwards compatibility
result = QgsVectorFileWriter.writeAsVectorFormat(
layer,
output,
fileEncoding=encoding,
attributes=attrs,
driverName=driver) # noqa
# Check if first item in result tuple is an error code
if result[0] == QgsVectorFileWriter.NoError:
logger.logInfo(f"Layer {lyr_name} exported to {output}")
else:
# Dump the result tuple as-is when there are errors (the tuple size depends on the QGIS version)
logger.logError(
f"Layer {lyr_name} failed to export.\n\tResult object: {str(result)}"
)
return output
else:
# Export raster
if force or not filepath.lower().endswith("tif"):
output = path or tempFileInSubFolder(safe_name + ".tif")
writer = QgsRasterFileWriter(output)
writer.setOutputFormat("GTiff")
writer.writeRaster(layer.pipe(), layer.width(), layer.height(),
layer.extent(), layer.crs())
del writer
logger.logInfo(f"Layer {lyr_name} exported to {output}")
return output
else:
logger.logInfo(
f"No need to export layer {lyr_name} stored at {filepath}")
return filepath
def _loadMetadataFromFgdcXml(layer, filename):
iso_filename = tempFileInSubFolder("fromfgdc.xml")
feedback.logInfo(f"Exporting FGDC metadata to {iso_filename}")
_convertMetadata(filename, iso_filename, FGDC_TO_ISO19115)
_loadMetadataFromEsriXml(layer, iso_filename)
def _loadMetadataFromWrappingEsriXml(layer, filename):
iso_filename = tempFileInSubFolder("fromesri.xml")
feedback.logInfo(f"Exporting Wrapping-ISO19115 metadata to {iso_filename}")
_convertMetadata(filename, iso_filename, WRAPPING_ISO19115_TO_ISO19139_XSLT)
_loadMetadataFromIsoXml(layer, iso_filename)
def _loadMetadataFromIsoXml(layer, filename):
qmd_filename = tempFileInSubFolder("fromiso.qmd")
feedback.logInfo(f"Exporting ISO19193 metadata to {qmd_filename}")
_convertMetadata(filename, qmd_filename, ISO19139_TO_QMD_XSLT)
layer.loadNamedMetadata(qmd_filename)
