geospatial searching

app/assets/stylesheets/application.sass

@@ -38,6 +38,10 @@
 .alert-notice
   @extend .alert-info
 
+.form-inline > *
+  margin: 5px
+
+
 body.admin
   background: repeating-linear-gradient(45deg, yellow, yellow 50px, black 50px, black 100px)
 

app/controllers/network/signature_collections_controller.rb

@@ -5,7 +5,22 @@ class Network::SignatureCollectionsController < ApplicationController
   # GET /network/signature_collections
   # GET /network/signature_collections.json
   def index
+    @query, @location, @distance = params[:query], params[:location], params[:distance]
+
     @network_signature_collections = Network::SignatureCollection.where(:event_date_start.gte =>  DateTime.now)
+
+    @network_signature_collections = @network_signature_collections.or(location_zip_s: /#{@query}/) if @query
+    @network_signature_collections = @network_signature_collections.or(location_name: /#{@query}/) if @query
+    @network_signature_collections = @network_signature_collections.or(location_address: /#{@query}/) if @query
+
+    distance_from_location
+  end
+
+  def distance_from_location
+    return unless @location && @distance
+    location_coordinates = Geocoder.coordinates(@location)
+    return unless location_coordinates # only filter when coordinates found
+    @network_signature_collections = @network_signature_collections.geo_near(location_coordinates.reverse).max_distance(@distance.to_f/111)
   end
 
   # GET /network/signature_collections/1

app/models/network/signature_collection.rb

@@ -1,8 +1,30 @@
 class Network::SignatureCollection
   include Mongoid::Document
+  include Geocoder::Model::Mongoid
+
   field :location_name, type: String
   field :location_zip, type: Integer
+  field :location_zip_s, type: String
   field :location_address, type: String
   field :event_date_start, type: Time
   field :event_date_end, type: Time
+  field :coordinates, type: Array
+
+  geocoded_by :address
+  before_save :update_location # auto-fetch coordinates
+  before_save :stringify_zip # auto-fetch coordinates
+
+  def address
+    "#{location_zip} #{location_name}, Switzerland"
+  end
+
+  def update_location
+    geocode
+  end
+
+  def stringify_zip
+    self.location_zip_s = self.location_zip.to_s
+  end
+
+  index({coordinates: "2d"})
 end

app/views/network/signature_collections/index.html.slim

@@ -1,6 +1,21 @@
 h1 = title t('.title')
-#signature_collections_table
-  input.search.form-control.string placeholder="#{t('.search')}"
+css:
+  .form-inline > * {
+    margin: 5px;
+  }
+form
+  .form-inline
+    input.form-control placeholder="#{t('.search')}" name="query" value="#{@query}"
+    input.form-control placeholder="#{t('.location')}" name="location" value="#{@location}"
+    select.form-control name="distance"
+      - [5, 10, 20, 50, 100, 150, 200].each do | d |
+        - if d == @distance.to_i
+          option value="#{d}" selected="selected" #{d} Km
+        - else
+          option value="#{d}" #{d} Km
+
+    input.btn.btn-primary type="submit" value="#{t('.search')}"
+
   table.table
     thead
       tr
@@ -30,10 +45,3 @@ h1 = title t('.title')
 br
 
 = link_to t('.new'), new_network_signature_collection_path
-
-javascript:
-  var options = {
-    valueNames: [ 'location_name', 'location_zip', 'location_address', 'event_date_start', 'event_date_end' ]
-  };
-
-  var signature_collections = new List('signature_collections_table', options);

config/locales/de.yml

@@ -119,6 +119,7 @@ de:
         new: Neue Sammlung erfasssen
         title: Unterschriftensammlungen
         search: Suche
+        location: Ort
   routes:
     initiative_text: initiativtext
     arguments: argumentarium

db/seeds.rb

@@ -7,8 +7,9 @@
 #   Mayor.create(name: 'Emanuel', city: cities.first)
 
 @cities = CSV.read Rails.root.join('db', 'plz_ch.csv')
-
 @cities.sample(122).each do |city|
   tmp_date = DateTime.now + rand(50)
   Network::SignatureCollection.create(location_zip: city.first, location_name: city.last, location_address: Faker::Address.street_address, event_date_start: tmp_date, event_date_end: tmp_date+rand(10).to_f/10)
 end
+
+#  Network::SignatureCollection.where(location: {"$near" => x.location,  '$maxDistance' => 1.fdiv(111.12)}).map &:location_name