Cleaner URL when using the filter form

app/assets/javascripts/filter.js.coffee

+# Cleans up filter submission, for cleaner URL
+$(document).on 'turbolinks:load', ->
+	$('body.filter form :input').prop 'disabled', false
+
+	$('body.filter form').submit ->
+		$('input[name=utf8]').prop 'disabled', true
+		$(':input', this).filter ->
+			this.value.length == 0
+		.prop 'disabled', true

app/views/application/filter.haml

@@ -16,11 +16,13 @@
       :markdown
         #{t '.period_year_helper'}
     = label_tag 'period[year]', t('.period_year')
-    = number_field_tag 'period[year]', (Time.zone.today + 7.days).year
+    = number_field_tag 'period[year]', params['period[year]'],
+                       placeholder: "Ex: #{(Time.zone.today + 7.days).year}"
 
   .field.period_week
     = label_tag 'period[week]', t('.period_week')
-    = number_field_tag 'period[week]', (Time.zone.today + 7.days).cweek
+    = number_field_tag 'period[week]', params['period[week]'],
+                       placeholder: "Ex: #{(Time.zone.today + 7.days).cweek}"
 
   .field.near_location
     = label_tag 'near[location]', t('.near_location')