simplify the state/city/name routes

config/routes.rb

@@ -3,6 +3,7 @@
 # License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
 Rails.application.routes.draw do
 
+  require_relative "./state_code_constraint"
   if Rails.env == 'development'
     get '/button_debug/embedded' => 'button_debug#embedded'
     get '/button_debug/button' => 'button_debug#button'
@@ -217,26 +218,32 @@ Rails.application.routes.draw do
   match '/events' => 'events#index', via: [:get]
   match '/events/:event_slug' => 'events#show', via: %i[get post]
 
-  # Nonprofits
-  match ':state_code/:city/:name' => 'nonprofits#show', :as => :nonprofit_location, via: %i[get post]
-  match ':state_code/:city/:name/donate' => 'nonprofits#donate', :as => :nonprofit_donation, via: %i[get post]
-  match ':state_code/:city/:name/button' => 'nonprofits/button#guided', via: %i[get post]
-
   # Campaigns
-  match ':state_code/:city/:name/campaigns' => 'campaigns#index', via: %i[get post]
-  match ':state_code/:city/:name/campaigns/:campaign_slug' => 'campaigns#show', via: %i[get post]
-  match ':state_code/:city/:name/campaigns/:campaign_slug/supporters' => 'campaigns/supporters#index', via: %i[get post]
   match '/peer-to-peer' => 'campaigns#peer_to_peer', via: %i[get post]
 
+  scope ':state_code/:city/:name' do
+    constraints StateCodeConstraint.new do
+      # Nonprofits
+      match '' => 'nonprofits#show', :as => :nonprofit_location, via: %i[get post]
+      match 'donate' => 'nonprofits#donate', :as => :nonprofit_donation, via: %i[get post]
+      match 'button' => 'nonprofits/button#guided', via: %i[get post]
+
+      # Campaigns
+      match 'campaigns' => 'campaigns#index', via: %i[get post]
+      match 'campaigns/:campaign_slug' => 'campaigns#show', via: %i[get post]
+      match 'campaigns/:campaign_slug/supporters' => 'campaigns/supporters#index', via: %i[get post]
+
+
       # Events
-  match ':state_code/:city/:name/events' => 'events#index', via: %i[get post]
-  match ':state_code/:city/:name/events/:event_slug' => 'events#show', via: %i[get post]
-  match ':state_code/:city/:name/events/:event_slug/stats' => 'events#stats', via: %i[get post]
-  match ':state_code/:city/:name/events/:event_slug/tickets' => 'tickets#index', via: %i[get post]
-  # get '/events' => 'events#index'
+      match 'events' => 'events#index', via: %i[get post]
+      match 'events/:event_slug' => 'events#show', via: %i[get post]
+      match 'events/:event_slug/stats' => 'events#stats', via: %i[get post]
+      match 'events/:event_slug/tickets' => 'tickets#index', via: %i[get post]
 
       # Dashboard
-  match ':state_code/:city/:name/dashboard' => 'nonprofits#dashboard', as: :np_dashboard, via: %i[get post]
+      match 'dashboard' => 'nonprofits#dashboard', as: :np_dashboard, via: %i[get post]
+    end
+  end
 
   # Misc
   get '/pages/wp-plugin', to: redirect('/help/wordpress-plugin') # temporary, until WP plugin updated

config/state_code_constraint.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
+class StateCodeConstraint
+  US_STATES = %w(AL AK AZ AR CA CO CT DE DC FL GA HI ID IL IN 
+      IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ 
+      NM NY NC ND OH OK OR PA PR RI SC SD TN TX UT VT VA WA WV WI WY)
+  US_STATES_REGEX = Regexp.union(*US_STATES.map{|i| /^#{i.downcase}$/})
+
+  def matches?(request)
+    US_STATES_REGEX =~ request.params[:state_code]
+  end
+end

spec/routing/state_code_routing_spec.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
+require "rails_helper"
+
+describe 'Routing by state code', type: :routing do
+    it 'routes by state-codes for lower case' do
+        expect(post: "/wi/appleton/name").to route_to(
+            controller: 'nonprofits',
+            action: "show",
+            state_code: "wi",
+            city: "appleton",
+            name: "name"
+        )
+    end
+
+    it 'fails to route for an incorrect two letter state' do
+        expect(post: "/us/appleton/name").to_not be_routable
+    end
+
+    it 'it fails to route if a valid state code is in the middle of the state_code' do
+        expect(get: '/hoho/cleveland/interesting-name').to_not be_routable
+    end
+end