spatial-d4science/ckanext/spatial/nongeos_plugin.py

from logging import getLogger

from ckan import plugins as p


log = getLogger(__name__)


class WMSPreview(p.SingletonPlugin):

    p.implements(p.IConfigurer, inherit=True)
    p.implements(p.IResourcePreview, inherit=True)

    WMS = ['wms']

    def update_config(self, config):

        p.toolkit.add_public_directory(config, 'public')
        p.toolkit.add_template_directory(config, 'templates')
        p.toolkit.add_resource('public', 'ckanext-spatial')

        self.proxy_enabled = p.toolkit.asbool(config.get('ckan.resource_proxy_enabled', 'False'))

    def setup_template_variables(self, context, data_dict):
        import ckanext.resourceproxy.plugin as proxy
        if self.proxy_enabled and not data_dict['resource']['on_same_domain']:
            p.toolkit.c.resource['proxy_url'] = proxy.get_proxified_resource_url(data_dict)
        else:
            p.toolkit.c.resource['proxy_url'] = data_dict['resource']['url']

    def can_preview(self, data_dict):
        format_lower = data_dict['resource']['format'].lower()

        correct_format = format_lower in self.WMS
        can_preview_from_domain = self.proxy_enabled or data_dict['resource']['on_same_domain']
        quality = 2

        if p.toolkit.check_ckan_version('2.1'):
            if correct_format:
                if can_preview_from_domain:
                    return {'can_preview': True, 'quality': quality}
                else:
                    return {'can_preview': False,
                            'fixable': 'Enable resource_proxy',
                            'quality': quality}
            else:
                return {'can_preview': False, 'quality': quality}

        return correct_format and can_preview_from_domain

    def preview_template(self, context, data_dict):
        return 'dataviewer/wms.html'


class GeoJSONPreview(p.SingletonPlugin):
    p.implements(p.IConfigurer, inherit=True)
    p.implements(p.IResourcePreview, inherit=True)
    p.implements(p.ITemplateHelpers, inherit=True)

    GeoJSON = ['gjson', 'geojson']

    def update_config(self, config):
        ''' Set up the resource library, public directory and
        template directory for the preview
        '''

        p.toolkit.add_public_directory(config, 'public')
        p.toolkit.add_template_directory(config, 'templates')
        p.toolkit.add_resource('public', 'ckanext-spatial')

        self.proxy_enabled = config.get(
            'ckan.resource_proxy_enabled', False)

    def can_preview(self, data_dict):
        format_lower = data_dict['resource']['format'].lower()

        correct_format = format_lower in self.GeoJSON
        can_preview_from_domain = self.proxy_enabled or data_dict['resource']['on_same_domain']
        quality = 2

        if p.toolkit.check_ckan_version('2.1'):
            if correct_format:
                if can_preview_from_domain:
                    return {'can_preview': True, 'quality': quality}
                else:
                    return {'can_preview': False,
                            'fixable': 'Enable resource_proxy',
                            'quality': quality}
            else:
                return {'can_preview': False, 'quality': quality}

        return correct_format and can_preview_from_domain

    def setup_template_variables(self, context, data_dict):
        import ckanext.resourceproxy.plugin as proxy
        if (self.proxy_enabled
                and not data_dict['resource']['on_same_domain']):
            p.toolkit.c.resource['original_url'] = p.toolkit.c.resource['url']
            p.toolkit.c.resource['url'] = proxy.get_proxified_resource_url(
                data_dict)

    def preview_template(self, context, data_dict):
        return 'dataviewer/geojson.html'

    ## ITemplateHelpers

    def get_helpers(self):
        from ckanext.spatial import helpers as spatial_helpers

        # CKAN does not allow to define two helpers with the same name
        # As this plugin can be loaded independently of the main spatial one
        # We define a different helper pointing to the same function
        return {
                'get_common_map_config_geojson' : spatial_helpers.get_common_map_config,
                }