Filter profile by location

Aurélio A. Heckert
1 parent bacb490a
Showing 1 changed file with 42 additions and 0 deletions Show diff stats
app/models/profile.rb
@@ -100,6 +100,48 @@ class Profile &lt; ActiveRecord::Base
   }
   scope :no_templates, {:conditions => {:is_template => false}}
  
+  # Returns a scoped object to select profiles in a given location or in a radius
+  # distance from the given location center.
+  # The parameter can be the `request.params` with the keys:
+  # * `country`: Country code string.
+  # * `state`: Second-level administrative country subdivisions.
+  # * `city`: City full name for center definition, or as set by users.
+  # * `lat`: The latitude to define the center of georef search.
+  # * `lng`: The longitude to define the center of georef search.
+  # * `distance`: Define the search radius in kilometers.
+  # NOTE: This method may return an exception object, to inform filter error.
+  # When chaining scopes, is hardly recommended you to add this as the last one,
+  # if you can't be sure about the provided parameters.
+  def self.by_location(params)
+    params = params.with_indifferent_access
+    if params[:distance].blank?
+      where_code = []
+      [ :city, :state, :country ].each do |place|
+        unless params[place].blank?
+          # ... So we must to find on this named location
+          # TODO: convert location attrs to a table collumn
+          where_code << "(profiles.data like '%#{place}: #{params[place]}%')"
+        end
+      end
+      self.where where_code.join(' AND ')
+    else # Filter in a georef circle
+      unless params[:lat].blank? && params[:lng].blank?
+        lat, lng = [ params[:lat].to_f, params[:lng].to_f ]
+      end
+      if !lat
+        location = [ params[:city], params[:state], params[:country] ].compact.join(', ')
+        if location.blank?
+          return Exception.new (
+            _('You must to provide `lat` and `lng`, or `city` and `country` to define the center of the search circle, defined by `distance`.')
+          )
+        end
+        lat, lng = Noosfero::GeoRef.location_to_georef location
+      end
+      dist = params[:distance].to_f
+      self.where "#{Noosfero::GeoRef.sql_dist lat, lng} <= #{dist}"
+    end
+  end
+
   include TimeScopes
  
   def members
...	...	@@ -100,6 +100,48 @@ class Profile < ActiveRecord::Base
100	100	}
101	101	scope :no_templates, {:conditions => {:is_template => false}}
102	102
	103	+ # Returns a scoped object to select profiles in a given location or in a radius
	104	+ # distance from the given location center.
	105	+ # The parameter can be the `request.params` with the keys:
	106	+ # * `country`: Country code string.
	107	+ # * `state`: Second-level administrative country subdivisions.
	108	+ # * `city`: City full name for center definition, or as set by users.
	109	+ # * `lat`: The latitude to define the center of georef search.
	110	+ # * `lng`: The longitude to define the center of georef search.
	111	+ # * `distance`: Define the search radius in kilometers.
	112	+ # NOTE: This method may return an exception object, to inform filter error.
	113	+ # When chaining scopes, is hardly recommended you to add this as the last one,
	114	+ # if you can't be sure about the provided parameters.
	115	+ def self.by_location(params)
	116	+ params = params.with_indifferent_access
	117	+ if params[:distance].blank?
	118	+ where_code = []
	119	+ [ :city, :state, :country ].each do \|place\|
	120	+ unless params[place].blank?
	121	+ # ... So we must to find on this named location
	122	+ # TODO: convert location attrs to a table collumn
	123	+ where_code << "(profiles.data like '%#{place}: #{params[place]}%')"
	124	+ end
	125	+ end
	126	+ self.where where_code.join(' AND ')
	127	+ else # Filter in a georef circle
	128	+ unless params[:lat].blank? && params[:lng].blank?
	129	+ lat, lng = [ params[:lat].to_f, params[:lng].to_f ]
	130	+ end
	131	+ if !lat
	132	+ location = [ params[:city], params[:state], params[:country] ].compact.join(', ')
	133	+ if location.blank?
	134	+ return Exception.new (
	135	+ _('You must to provide `lat` and `lng`, or `city` and `country` to define the center of the search circle, defined by `distance`.')
	136	+ )
	137	+ end
	138	+ lat, lng = Noosfero::GeoRef.location_to_georef location
	139	+ end
	140	+ dist = params[:distance].to_f
	141	+ self.where "#{Noosfero::GeoRef.sql_dist lat, lng} <= #{dist}"
	142	+ end
	143	+ end
	144	+
103	145	include TimeScopes
104	146
105	147	def members
...	...