ckanext-googleanalytics_v2.0.7_GA4/ckanext/googleanalytics/plugin.py

import logging
import urllib
import os
from paste.deploy.converters import asbool
from genshi.filters import Transformer
from genshi import HTML
from genshi.core import START, TEXT
from genshi.filters.transform import INSIDE, EXIT
from pylons import config, request
from ckan.plugins import implements, SingletonPlugin
from ckan.plugins import IGenshiStreamFilter, IConfigurable, IRoutes
from ckan.plugins import IConfigurer
from gasnippet import gacode
from commands import DEFAULT_RESOURCE_URL_TAG
import dbutil

log = logging.getLogger('ckanext.googleanalytics')


class GoogleAnalyticsException(Exception):
    pass


class GoogleAnalyticsPlugin(SingletonPlugin):
    implements(IConfigurable, inherit=True)
    implements(IGenshiStreamFilter, inherit=True)
    implements(IRoutes, inherit=True)
    implements(IConfigurer, inherit=True)

    def configure(self, config):
        self.config = config
        if (not 'googleanalytics.id' in config):
            msg = "Missing googleanalytics.id in config"
            raise GoogleAnalyticsException(msg)

    def filter(self, stream):
        log.info("Inserting GA code into template")
        ga_id = self.config['googleanalytics.id']
        ga_domain = self.config.get('googleanalytics.domain', 'auto')
        code = HTML(gacode % (ga_id, ga_domain))
        stream = stream | Transformer('head').append(code)
        resource_url = config.get('googleanalytics.resource_prefix',
                                  DEFAULT_RESOURCE_URL_TAG)
        show_downloads = asbool(config.get('googleanalytics.show_downloads',
                                           True))

        routes = request.environ.get('pylons.routes_dict')
        if (routes.get('controller') == 'package' and
            routes.get('action') == 'read'):

            # add download tracking link
            def js_attr(name, event):
                attrs = event[1][1]
                href = attrs.get('href').encode('utf-8')
                link = '%s%s' % (resource_url, urllib.quote(href))
                js = "javascript: _gaq.push(['_trackPageview', '%s']);" % link
                return js

            # add some stats
            def download_adder(stream):
                download_html = '''<span class="downloads-count">
                (downloaded %s times)</span>'''
                count = None
                for mark, (kind, data, pos) in stream:
                    if mark and kind == START:
                        href = data[1].get('href')
                        if href:
                            count = dbutil.get_resource_visits_for_url(href)
                    if count and mark is EXIT:
                        # emit count
                        yield INSIDE, (TEXT, HTML(download_html % count), pos)
                    yield mark, (kind, data, pos)

            # and some styling
            download_style = '''
            <style type="text/css">
               span.downloads-count {
               font-size: 0.9em;
               }
            </style>
            '''

            # perform the stream transform
            stream = stream | Transformer('//p[@class="resource-url"]//a')\
                .attr('onclick', js_attr)

            if show_downloads:
                stream = stream | Transformer('//p[@class="resource-url"]//a')\
                    .apply(download_adder)
                stream = stream | Transformer('//link[@rel="stylesheet"]')\
                    .append(HTML(download_style))

        return stream

    def after_map(self, map):
        map.redirect("/analytics/package/top", "/analytics/dataset/top")
        map.connect('analytics', '/analytics/dataset/top',
                    controller='ckanext.googleanalytics.controller:GAController',
                    action='view')
        return map

    def update_config(self, config):
        here = os.path.dirname(__file__)
        rootdir = os.path.dirname(os.path.dirname(here))
        template_dir = os.path.join(rootdir, 'ckanext',
                                    'googleanalytics', 'templates')
        config['extra_template_paths'] = ','.join(
            [template_dir, config.get('extra_template_paths', '')]
        )