Class: LocateRule

Inherits:
Object
  • Object
show all
Defined in:
app/models/locate_rule.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, layer = nil, search_field = nil) ⇒ LocateRule

Returns a new instance of LocateRule.



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# File 'app/models/locate_rule.rb', line 4

def initialize(model, layer=nil, search_field=nil)
  @model = model.constantize
  @layer = layer
  @search_field = search_field
end

Instance Attribute Details

#layer ⇒ Object

Returns the value of attribute layer.



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# File 'app/models/locate_rule.rb', line 2

def layer
  @layer
end

#model ⇒ Object

Returns the value of attribute model.



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# File 'app/models/locate_rule.rb', line 2

def model
  @model
end

#search_field ⇒ Object

Returns the value of attribute search_field.



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# File 'app/models/locate_rule.rb', line 2

def search_field
  @search_field
end

Instance Method Details

#locate(locations, client_srid = nil) ⇒ Object

get selection and extent for located features



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# File 'app/models/locate_rule.rb', line 11

def locate(locations, client_srid=nil)
  features = if layer.nil?
    # user defined model
    seltopic = model.selection_topic
    sellayer = model.selection_layer
    selproperty = model.primary_key
    selscalerange = model.selection_scalerange
    search_locs = model.search_locations(locations)
    model.locate(search_locs, client_srid)
  else
    # generic SearchModel
    layer_obj = Layer.find_by_name(layer)
    seltopic = nil
    sellayer = layer_obj.name
    selproperty = layer_obj.feature_class.primary_key
    selscalerange = model.selection_scalerange
    search_locs = locations.split(',')
    model.layer_locate(layer_obj, search_field, search_locs, client_srid)
  end
  if features.present?
    x, y, scale = model.map_center(features)
    {
      :selection => {
        :topic => seltopic,
        :layer => sellayer,
        :property => selproperty,
        :values => features.collect {|f| f.send(model.primary_key) },
        :scalerange => selscalerange,
      },
      :x => x,
      :y => y,
      :scale => scale,
      :bbox => model.bbox(features)
    }
  else
    # no features found
    nil
  end
end