fix(geometry): implement our own bbox to replace rgeo

app/graphql/types/geo_area_type.rb

@@ -12,7 +12,7 @@ module Types
 
     global_id_field :id
     field :source, GeoAreaSource, null: false
-    field :geometry, Types::GeoJSON, null: false, method: :safe_geometry
+    field :geometry, Types::GeoJSON, null: false
     field :description, String, null: true
 
     definition_methods do

app/models/champs/carte_champ.rb

@@ -64,21 +64,14 @@ class Champs::CarteChamp < Champ
   end
 
   def bounding_box
-    factory = RGeo::Geographic.simple_mercator_factory
-    bounding_box = RGeo::Cartesian::BoundingBox.new(factory)
-
     if geo_areas.present?
-      geo_areas.filter_map(&:rgeo_geometry).each do |geometry|
-        bounding_box.add(geometry)
-      end
+      GeojsonService.bbox(type: 'FeatureCollection', features: geo_areas.map(&:to_feature))
     elsif dossier.present?
       point = dossier.geo_position
-      bounding_box.add(factory.point(point[:lon], point[:lat]))
+      GeojsonService.bbox(type: 'Feature', geometry: { type: 'Point', coordinates: [point[:lon], point[:lat]] })
     else
-      bounding_box.add(factory.point(DEFAULT_LON, DEFAULT_LAT))
+      GeojsonService.bbox(type: 'Feature', geometry: { type: 'Point', coordinates: [DEFAULT_LON, DEFAULT_LAT] })
     end
-
-    [bounding_box.max_point, bounding_box.min_point].compact.flat_map(&:coordinates)
   end
 
   def to_feature_collection

app/models/dossier.rb

@@ -1312,14 +1312,7 @@ class Dossier < ApplicationRecord
   end
 
   def bounding_box
-    factory = RGeo::Geographic.simple_mercator_factory
-    bounding_box = RGeo::Cartesian::BoundingBox.new(factory)
-
-    geo_areas.filter_map(&:rgeo_geometry).each do |geometry|
-      bounding_box.add(geometry)
-    end
-
-    [bounding_box.max_point, bounding_box.min_point].compact.flat_map(&:coordinates)
+    GeojsonService.bbox(type: 'FeatureCollection', features: geo_areas.map(&:to_feature))
   end
 
   def log_dossier_operation(author, operation, subject = nil)

app/models/geo_area.rb

@@ -52,11 +52,12 @@ class GeoArea < ApplicationRecord
   scope :cadastres, -> { where(source: sources.fetch(:cadastre)) }
 
   validates :geometry, geo_json: true, allow_blank: false
+  before_validation :normalize_geometry
 
   def to_feature
     {
       type: 'Feature',
-      geometry: safe_geometry,
+      geometry: geometry.deep_symbolize_keys,
       properties: cadastre_properties.merge(
         source: source,
         area: area,
@@ -96,16 +97,6 @@ class GeoArea < ApplicationRecord
     end
   end
 
-  def safe_geometry
-    RGeo::GeoJSON.encode(rgeo_geometry)
-  end
-
-  def rgeo_geometry
-    RGeo::GeoJSON.decode(geometry.to_json, geo_factory: RGeo::Geographic.simple_mercator_factory)
-  rescue RGeo::Error::InvalidGeometry
-    nil
-  end
-
   def area
     if polygon?
       GeojsonService.area(geometry.deep_symbolize_keys).round(1)
@@ -120,7 +111,7 @@ class GeoArea < ApplicationRecord
 
   def location
     if point?
-      Geo::Coord.new(*rgeo_geometry.coordinates.reverse).to_s
+      Geo::Coord.new(*geometry['coordinates'].reverse).to_s
     end
   end
 
@@ -238,4 +229,21 @@ class GeoArea < ApplicationRecord
       properties['id']
     end
   end
+
+  private
+
+  def normalize_geometry
+    if geometry.present?
+      normalized_geometry = rgeo_geometry
+      if normalized_geometry.present?
+        self.geometry = RGeo::GeoJSON.encode(normalized_geometry)
+      end
+    end
+  end
+
+  def rgeo_geometry
+    RGeo::GeoJSON.decode(geometry.to_json, geo_factory: RGeo::Geographic.simple_mercator_factory)
+  rescue RGeo::Error::InvalidGeometry
+    nil
+  end
 end

app/serializers/champ_serializer.rb

@@ -13,7 +13,7 @@ class ChampSerializer < ActiveModel::Serializer
   def value
     case object
     when GeoArea
-      object.safe_geometry
+      object.geometry
     else
       object.for_api
     end

app/serializers/geo_area_serializer.rb

@@ -12,7 +12,7 @@ class GeoAreaSerializer < ActiveModel::Serializer
   attribute :code_arr, if: :include_cadastre?
 
   def geometry
-    object.safe_geometry
+    object.geometry
   end
 
   def include_cadastre?

app/services/geojson_service.rb

@@ -45,6 +45,66 @@ class GeojsonService
     radians * EQUATORIAL_RADIUS
   end
 
+  def self.bbox(geojson)
+    result = [-Float::INFINITY, -Float::INFINITY, Float::INFINITY, Float::INFINITY]
+
+    self.coord_each(geojson) do |coord|
+      if result[3] > coord[1]
+        result[3] = coord[1]
+      end
+      if result[2] > coord[0]
+        result[2] = coord[0]
+      end
+      if result[1] < coord[1]
+        result[1] = coord[1]
+      end
+      if result[0] < coord[0]
+        result[0] = coord[0]
+      end
+    end
+
+    result
+  end
+
+  def self.coord_each(geojson)
+    geometries = if geojson.fetch(:type) == "FeatureCollection"
+      geojson.fetch(:features).map { _1.fetch(:geometry) }
+    else
+      [geojson.fetch(:geometry)]
+    end.compact
+
+    geometries.each do |geometry|
+      geometries = if geometry.fetch(:type) == "GeometryCollection"
+        geometry.fetch(:geometries)
+      else
+        [geometry]
+      end.compact
+
+      geometries.each do |geometry|
+        case geometry.fetch(:type)
+        when "Point"
+          yield geometry.fetch(:coordinates).map(&:to_f)
+        when "LineString", "MultiPoint"
+          geometry.fetch(:coordinates).each { yield _1.map(&:to_f) }
+        when "Polygon", "MultiLineString"
+          geometry.fetch(:coordinates).each do |shapes|
+            shapes.each { yield _1.map(&:to_f) }
+          end
+        when "MultiPolygon"
+          geometry.fetch(:coordinates).each do |polygons|
+            polygons.each do |shapes|
+              shapes.each { yield _1.map(&:to_f) }
+            end
+          end
+        when "GeometryCollection"
+          geometry.fetch(:geometries).each do |geometry|
+            coord_each(geometry) { yield _1 }
+          end
+        end
+      end
+    end
+  end
+
   def self.calculate_area(geom)
     total = 0
     case geom[:type]

spec/models/champs/carte_champ_spec.rb

@@ -1,7 +1,7 @@
 describe Champs::CarteChamp do
   let(:champ) { Champs::CarteChamp.new(geo_areas: geo_areas, type_de_champ: create(:type_de_champ_carte)) }
   let(:value) { '' }
-  let(:coordinates) { [[2.3859214782714844, 48.87442541960633], [2.3850631713867183, 48.87273183590832], [2.3809432983398438, 48.87081237174292], [2.3859214782714844, 48.87442541960633]] }
+  let(:coordinates) { [[[2.3859214782714844, 48.87442541960633], [2.3850631713867183, 48.87273183590832], [2.3809432983398438, 48.87081237174292], [2.3859214782714844, 48.87442541960633]]] }
   let(:geo_json) do
     {
       "type" => 'Polygon',

spec/models/dossier_spec.rb

@@ -1516,8 +1516,8 @@ describe Dossier do
           {
             type: 'Feature',
             geometry: {
-              'coordinates' => [[[2.428439855575562, 46.538476837725796], [2.4284291267395024, 46.53842148758162], [2.4282521009445195, 46.53841410755813], [2.42824137210846, 46.53847314771794], [2.428284287452698, 46.53847314771794], [2.428364753723145, 46.538487907747864], [2.4284291267395024, 46.538491597754714], [2.428439855575562, 46.538476837725796]]],
-              'type' => 'Polygon'
+              coordinates: [[[2.428439855575562, 46.538476837725796], [2.4284291267395024, 46.53842148758162], [2.4282521009445195, 46.53841410755813], [2.42824137210846, 46.53847314771794], [2.428284287452698, 46.53847314771794], [2.428364753723145, 46.538487907747864], [2.4284291267395024, 46.538491597754714], [2.428439855575562, 46.538476837725796]]],
+              type: 'Polygon'
             },
             properties: {
               area: 103.6,

spec/models/geo_area_spec.rb

@@ -23,7 +23,7 @@ RSpec.describe GeoArea, type: :model do
     it { expect(geo_area.location).to eq("46°32'19\"N 2°25'42\"E") }
   end
 
-  describe '#rgeo_geometry' do
+  describe '#geometry' do
     let(:geo_area) { build(:geo_area, :polygon, champ: nil) }
     let(:polygon) do
       {
@@ -47,9 +47,9 @@ RSpec.describe GeoArea, type: :model do
 
     context 'polygon_with_extra_coordinate' do
       let(:geo_area) { build(:geo_area, :polygon_with_extra_coordinate, champ: nil) }
+      before { geo_area.valid? }
 
-      it { expect(geo_area.geometry).not_to eq(polygon) }
-      it { expect(geo_area.safe_geometry).to eq(polygon) }
+      it { expect(geo_area.geometry).to eq(polygon) }
     end
   end