demarches-normaliennes/app/models/geo_area.rb

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class GeoArea < ApplicationRecord
belongs_to :champ
store :properties, accessors: [
:surface_intersection,
:surface_parcelle,
:numero,
:feuille,
:section,
:code_dep,
:nom_com,
:code_com,
:code_arr,
:code,
:nom,
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:commune,
:culture,
:code_culture,
:surface,
:bio
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]
enum source: {
quartier_prioritaire: 'quartier_prioritaire',
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cadastre: 'cadastre',
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parcelle_agricole: 'parcelle_agricole',
selection_utilisateur: 'selection_utilisateur'
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}
scope :selections_utilisateur, -> { where(source: sources.fetch(:selection_utilisateur)) }
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scope :quartiers_prioritaires, -> { where(source: sources.fetch(:quartier_prioritaire)) }
scope :cadastres, -> { where(source: sources.fetch(:cadastre)) }
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scope :parcelles_agricoles, -> { where(source: sources.fetch(:parcelle_agricole)) }
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def to_feature
{
type: 'Feature',
geometry: geometry,
properties: properties.merge(source: source, area: area, length: length).compact
}
end
def rgeo_geometry
RGeo::GeoJSON.decode(geometry.to_json, geo_factory: RGeo::Geographic.simple_mercator_factory)
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end
def self.from_feature_collection(feature_collection)
feature_collection[:features].map do |feature|
GeoArea.new(
source: feature[:properties].delete(:source),
properties: feature[:properties],
geometry: feature[:geometry]
)
end
end
def area
if polygon? && RGeo::Geos.supported?
rgeo_geometry.area.round(1)
end
end
def length
if line? && RGeo::Geos.supported?
rgeo_geometry.length.round(1)
end
end
def location
if point?
Geo::Coord.new(*rgeo_geometry.coordinates).to_s
end
end
def line?
geometry['type'] == 'LineString'
end
def polygon?
geometry['type'] == 'Polygon'
end
def point?
geometry['type'] == 'Point'
end
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end