Add a way to reach specific training modules and slides via ID numbers

app/controllers/training_controller.rb

@@ -59,6 +59,17 @@ def reload
     render plain: e.message
   end
 
+  def find_slide
+    training_slide = TrainingSlide.find(params[:slide_id])
+    training_slide_slug = "%- #{training_slide.slug}\n%"
+    training_module = TrainingModule.find_by("slide_slugs LIKE ?", training_slide_slug)
+    raise ActionController::RoutingError, 'module not found' unless training_module
+    training_module_slug = "%- slug: #{training_module.slug}\n%"
+    training_library = TrainingLibrary.find_by("categories LIKE ?", training_module_slug)
+    raise ActionController::RoutingError, 'library not found' unless training_library
+    redirect_to "/training/#{training_library.slug}/#{training_module.slug}/#{training_slide.slug}"
+  end
+
   private
 
   def add_training_root_breadcrumb

app/controllers/training_modules_controller.rb

@@ -11,4 +11,12 @@ def index
   def show
     @training_module = TrainingModule.find_by(slug: params[:module_id])
   end
+
+  def find
+    training_module = TrainingModule.find(params[:module_id])
+    training_module_slug = "%- slug: #{training_module.slug}\n%"
+    training_library = TrainingLibrary.find_by("categories LIKE ?", training_module_slug)
+    raise ActionController::RoutingError, 'library not found' unless training_library
+    redirect_to "/training/#{training_library.slug}/#{training_module.slug}"
+  end
 end

config/routes.rb

@@ -328,6 +328,11 @@
   get 'training_modules' => 'training_modules#index'
   get 'training_module' => 'training_modules#show'
 
+  # To find training modules by id
+  get 'find_training_module/:module_id' => 'training_modules#find'
+
+  # To find individual slides by id
+  get 'find_training_slide/:slide_id' => 'training#find_slide'
 
   # Misc
   # get 'courses' => 'courses#index'

spec/controllers/training_controller_spec.rb

@@ -140,4 +140,71 @@
       end
     end
   end
+
+  describe '#find' do
+    subject { get "/find_training_module/#{module_id}" }
+
+    context 'module_id is found' do
+      let(:module_id) { 12 }
+
+      it 'redirects to a training module page' do
+        subject
+        expect(response).to redirect_to("/training/students/peer-review")
+      end
+    end
+
+    context 'module_id is found but it is in no library' do
+      let(:module_id) { 2 }
+
+      it 'raises a routing error' do
+        expect { subject }.to raise_error ActionController::RoutingError
+      end
+    end
+
+    context 'module_id is not found' do
+      let(:module_id) { 128456 }
+
+      it 'raises a module not found error' do
+        expect { subject }.to raise_error ActiveRecord::RecordNotFound
+      end
+    end
+  end
+
+  describe '#find_slide' do
+    subject { get "/find_training_slide/#{slide_id}" }
+
+    context 'slide_id is found' do
+      let(:slide_id) { 332 }
+
+      it 'redirects to a training slide page' do
+        subject
+        expect(response).to redirect_to("/training/instructors/new-instructor-orientation/new-instructor-orientation-complete")
+      end
+    end
+
+    context 'slide_id is found but it is in no module' do
+      let(:slide) { create(:training_slide) }
+      let(:slide_id) { slide.id }
+
+      it 'raises a routing error' do
+        expect { subject }.to raise_error ActionController::RoutingError, "module not found"
+      end
+    end
+
+    context 'slide_id is found but its module is in no library' do
+      let(:slide_id) { 201 }
+
+      it 'raises a routing error' do
+        expect { subject }.to raise_error ActionController::RoutingError, "library not found"
+      end
+    end
+
+    context 'slide_id is not found' do
+      let(:slide_id) { 128456 }
+
+      it 'raises a module not found error' do
+        expect { subject }.to raise_error ActiveRecord::RecordNotFound
+      end
+    end
+  end
 end

spec/factories/training_slides.rb

@@ -19,5 +19,8 @@
 
 FactoryBot.define do
   factory :training_slide do
+    id { 456875}
+    title { 'How to create a slide' }
+    slug { 'how-to-create-a-slide' }
   end
 end