Merge pull request #219 from DFE-Digital/2165-update-local-authoritie…

…s-data

Update local authorities data

README.md

@@ -20,6 +20,12 @@ This project depends on:
 
 When updating the `db/data/hubs.csv` file, please make sure to run `rails r 'Hub::Importer.new.reload!'` locally first to make sure all changes were applied.
 
+### Updating Authorities File
+
+Geojson file can be find here: https://geoportal.statistics.gov.uk/datasets/f23beaa3769a4488b6a5f0cfb7980f51_0/explore?location=52.427623%2C-1.470139%2C8.26
+Due to size of the file, it is split into several files. Individual files should be smaller than 100 MB due to git limitations.
+See `lib/tasks/split_authorities_file.rake` for details.
+
 ## Testing
 
 ### Mocking with VCR for feature specs

app/lib/local_authority/importer.rb

@@ -1,9 +1,10 @@
 class LocalAuthority::Importer
-  DEFAULT_SOURCE = Rails.root.join("db/data/authorities.json").freeze
+  DEFAULT_SOURCES = (1..LOCAL_AUTHORITIES_FILES_COUNT).map { |num|
+ Rails.root.join("db/data/authorities_#{num}.json") }.freeze
   attr_reader :path
 
-  def initialize(path = DEFAULT_SOURCE)
-    @path = path
+  def initialize(paths = DEFAULT_SOURCES)
+    @paths= paths
   end
 
   def reload!
@@ -29,15 +30,17 @@ def read_file(geojson_path)
   end
 
   def load
-    Rails.logger.debug("Loading #{@path}")
+    @paths.each do |path|
+      Rails.logger.debug("Loading #{path}")
 
-    features = read_file(@path)
+      features = read_file(path)
 
-    features.each do |feature|
-      LocalAuthority.create!(
-        name: feature.properties["LAD22NM"],
-        geometry: feature.geometry
-      )
+      features.each do |feature|
+        LocalAuthority.create!(
+          name: feature.properties["LAD24NM"],
+          geometry: feature.geometry
+        )
+      end
     end
   end
 

app/lib/local_authority/search.rb

@@ -37,7 +37,7 @@ def search_polygon
 
   def transform(geo)
     RGeo::CoordSys::Proj4.transform(
-      RGeo::CoordSys::Proj4.new("EPSG:4326"),
+      RGeo::CoordSys::Proj4.new("EPSG:27700"),
       geo,
       RGeo::CoordSys::Proj4.new("EPSG:27700"),
       RGeo::Cartesian.preferred_factory

config/initializers/constants.rb

@@ -0,0 +1 @@
+LOCAL_AUTHORITIES_FILES_COUNT = 5