add "add Data" functionality

[qgib]

Author Name: Tom Kralidis (@tomkralidis) Original Redmine Issue: 11733

Redmine category:metasearch_catalogue_client

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Allow the user to download data from the record (like a Shapefile, GeoTIFF, etc.) and load directly into the map canvas. See https://github.com/geopython/MetaSearch/wiki/Discovery-workflow for more info.

tl; dr; waiting on CSW with records with links to zipped Shapefile or GeoTIFF for implementation.

Full history at https://github.com/geopython/MetaSearch/issues/25

[qgib]

Author Name: Tom Kralidis (@tomkralidis)

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• project_id was changed from 218 to 17

[qgib]

Author Name: Tom Kralidis (@tomkralidis)

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• category_id was configured as MetaSearch Catalogue Client

[qgib]

Author Name: jorge luis infante (jorge luis infante)

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Hi I'd like contribute with this functionality. My idea is to implement the reading of the "missing" protocols (we have a lot in https://github.com/geopython/pycsw/wiki/Geonode-notes) in the library "owslib" or use the library "ftplib" in the plug, as shown in https://docs.python.org/2/library/ftplib.html? I would also collaborate on access to PostgreSQL / PostGIS. mainly because, in practice, access through wfs is extremely slow, for large layers (say, all parcels of a city like Rosario, Argentina). Also, I do not know if there is, I would like to work on a mechanism checkin / checkout layers with concurrent access, and conflict resolution. Obviously, that's for later, but first I want to achieve, at least, to recover a layer efficiently, and have the possibility (which is why I thought ftp), of not having to expose the RDBMS network users.

[qgib]

Author Name: Tom Kralidis (@tomkralidis)

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Note that current efforts around link types can be found in https://github.com/OSGeo/Cat-Interop/blob/master/LinkPropertyLookupTable.csv

I would go about this as follows:

• add "Download Data" button
• look for @startswith('WWW:DOWNLOAD')@ to activate the "Download Data" button
• at this point clicking the button should take you to a direct link
• of the data. Maybe a generic approach is to open the URL in a web
• browser if the URL is a directory listing (test with something like

if os.path.splitext(urlparse.urlparse('http://example.org/foo.xml').path)[1]:
    # download direct file
else:
    # open in browser

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0

[tomchadwin]

@tomkralidis We might have a use case for wanting PostGIS layers to be added direct from the MetaSearch plugin. Was there any work done on this, or should we start from scratch if we need to?

[tomkralidis]

@tomchadwin thanks for the info. This would be a valued addition! I'm not aware of any work in this area, but the basic implementation path would be:

• add a link type DB:POSTGIS in python/plugins/MetaSearch/link_types.py
• add a slot/binding in https://github.com/qgis/QGIS/blob/master/python/plugins/MetaSearch/dialogs/maindialog.py#L136 to trigger the PostGIS provider when DB:POSTGIS is detected

Happy to discuss further.