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# app/controllers/track_controller.rb:
# Publically visible email alerts and RSS - think an alert system crossed with
# social bookmarking.
#
# Copyright (c) 2008 UK Citizens Online Democracy. All rights reserved.
# Email: hello@mysociety.org; WWW: http://www.mysociety.org/
class TrackController < ApplicationController
before_filter :medium_cache
# Track all updates to a particular request
def track_request
@info_request = InfoRequest.find_by_url_title!(params[:url_title])
@track_thing = TrackThing.create_track_for_request(@info_request)
return atom_feed_internal if params[:feed] == 'feed'
if self.track_set
redirect_to request_url(@info_request)
end
end
# Track all new/successful requests
def track_list
@view = params[:view]
if @view == 'recent' || @view.nil? # the blank one for backwards compatibility
@track_thing = TrackThing.create_track_for_all_new_requests
elsif @view == 'successful'
@track_thing = TrackThing.create_track_for_all_successful_requests
else
raise "unknown request list view " + @view.to_s
end
return atom_feed_internal if params[:feed] == 'feed'
if self.track_set
redirect_to request_list_url(:view => @view)
end
end
# Track all updates to a particular public body
def track_public_body
@public_body = PublicBody.find_by_url_name_with_historic(params[:url_name])
raise ActiveRecord::RecordNotFound.new("None found") if @public_body.nil?
# If found by historic name, or alternate locale name, redirect to new name
if @public_body.url_name != params[:url_name]
redirect_to track_public_body_url(:url_name => @public_body.url_name, :feed => params[:feed], :event_type => params[:event_type])
return
end
if params[:event_type]
@track_thing = TrackThing.create_track_for_public_body(@public_body, params[:event_type])
else
@track_thing = TrackThing.create_track_for_public_body(@public_body)
end
return atom_feed_internal if params[:feed] == 'feed'
if self.track_set
redirect_to public_body_url(@public_body)
end
end
# Track a user
def track_user
@track_user = User.find_by_url_name(params[:url_name])
raise ActiveRecord::RecordNotFound.new("No such user") if @track_user.nil?
@track_thing = TrackThing.create_track_for_user(@track_user)
return atom_feed_internal if params[:feed] == 'feed'
if self.track_set
redirect_to user_url(@track_user)
end
end
# Track a search term
def track_search_query
@query = params[:query_array]
# TODO: more hackery to make alternate formats still work with query_array
if /^(.*)\.json$/.match(@query)
@query = $1
params[:format] = "json"
end
@track_thing = TrackThing.create_track_for_search_query(@query)
return atom_feed_internal if params[:feed] == 'feed'
if self.track_set
if @query.scan("variety").length == 1
# we're making a track for a simple filter, for which
# there's an expression in the UI (rather than relying
# on index:value strings in the query)
if @query =~ /variety:user/
postfix = "users"
@query.sub!("variety:user", "")
elsif @query =~ /variety:authority/
postfix = "bodies"
@query.sub!("variety:authority", "")
elsif @query =~ /variety:sent/
postfix = "requests"
@query.sub!("variety:sent", "")
end
@query.strip!
end
redirect_to search_url([@query, postfix])
end
end
# Generic request tracker - set @track_thing before calling
def track_set
if @user
@existing_track = TrackThing.find_existing(@user, @track_thing)
if @existing_track
flash[:notice] = view_context.already_subscribed_notice(@track_thing)
return true
end
end
if not authenticated?(@track_thing.params)
return false
end
@track_thing.track_medium = 'email_daily'
@track_thing.tracking_user_id = @user.id
@track_thing.save!
flash[:notice] = render_to_string(:partial => 'track_set').html_safe
return true
end
# Old-Style atom track. We're phasing this out, so for now issue a
# 301 Redirect. Most aggregators should honour this, but we should
# keep an eye on the logs to see which ones are still used before
# deleting this (or for safety, we may wish to move them to a new
# table)
def atom_feed
@track_thing = TrackThing.find(params[:track_id].to_i)
if @track_thing.track_medium != 'feed'
raise "can only view feeds for feed tracks, not email ones"
end
redirect_to do_track_url(@track_thing, 'feed'), :status => :moved_permanently
end
def atom_feed_internal
@xapian_object = perform_search([InfoRequestEvent], @track_thing.track_query, @track_thing.params[:feed_sortby], nil, 25, 1)
# We're assuming that a request to a feed url with no format suffix wants atom/xml
# so set that as the default, regardless of content negotiation
request.format = 'xml' unless params[:format]
respond_to do |format|
format.json { render :json => @xapian_object.results.map { |r| r[:model].json_for_api(true,
lambda do |t|
view_context.highlight_and_excerpt(
t,
@xapian_object.words_to_highlight(
:regex => true,
:include_original => true),
150
)
end
) } }
format.any { render :template => 'track/atom_feed',
:formats => ['atom'],
:layout => false,
:content_type => 'application/atom+xml' }
end
end
# Change or delete a track
def update
track_thing = TrackThing.find(params[:track_id].to_i)
if not authenticated_as_user?(track_thing.tracking_user,
:web => _("To cancel this alert"),
:email => _("Then you can cancel the alert."),
:email_subject => _("Cancel a {{site_name}} alert",:site_name=>site_name)
)
# do nothing - as "authenticated?" has done the redirect to signin page for us
return
end
new_medium = params[:track_medium]
if new_medium == 'delete'
track_thing.destroy
flash[:notice] = view_context.unsubscribe_notice(track_thing)
redirect_to URI.parse(params[:r]).path
else
raise "new medium not handled " + new_medium
end
end
# Remove all tracks of a certain type (e.g. requests / users / bodies)
def delete_all_type
user_id = User.find(params[:user].to_i)
if not authenticated_as_user?(user_id,
:web => _("To cancel these alerts"),
:email => _("Then you can cancel the alerts."),
:email_subject => _("Cancel some {{site_name}} alerts",:site_name=>site_name)
)
# do nothing - as "authenticated?" has done the redirect to signin page for us
return
end
track_type = params[:track_type]
flash[:notice] = _("You will no longer be emailed updates for those alerts")
for track_thing in TrackThing.find(:all, :conditions => [ "track_type = ? and tracking_user_id = ?", track_type, user_id ])
track_thing.destroy
end
redirect_to URI.parse(params[:r]).path
end
end
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