ANW-1182: bugfix for 500 error thrown in date calculator

frontend/app/controllers/date_calculator_controller.rb

@@ -35,7 +35,8 @@ def calculate
 
   def create_date
     begin
-      date = JSONModel(:date).from_hash(params[:date].to_hash)
+      date = params.require(:date).permit(JSONModel(:date).schema["properties"].keys).to_hash
+      date = JSONModel(:date).from_hash(date)
 
       record = JSONModel(params[:record_type].intern).find(params[:record_id])
 

frontend/spec/controllers/date_calculator_controller_spec.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'rails_helper'
+
+describe DateCalculatorController, type: :controller do
+  render_views
+
+  before(:each) do
+    set_repo($repo)
+  end
+
+  it "manages 4 digit years in params" do
+    allow(controller).to receive(:user_must_have).and_return(true)
+    resource = create(:json_resource)
+    allow(JSONModel(:resource)).to receive(:find).and_return(resource)
+
+    params = { "record_uri" => resource.uri,
+               "record_type" => "resource",
+               "record_id" => resource.id, "date"=>{"lock_version"=>"", "label"=>"creation", "expression"=>"", "date_type"=>"inclusive", "begin"=>"1900", "end"=>"1901", "certainty"=>"", "era"=>"", "calendar"=>""}
+             }
+
+    user = build(:json_user).save(password: "saa2020")
+    user = User.find(user)
+    group = create(:json_group,
+                   member_usernames: [user.username],
+                   grants_permissions: ["view_repository", "update_resource_record", "delete_event_record"])
+    session = User.login(user.username, "saa2020")
+    User.establish_session(controller, session, user.username)
+    controller.send(:load_repository_list)
+    post :create_date, params: params
+    expect(response.status).to eq(200)
+  end
+end