Update api with CRUD.

app/controllers/api/v1/cats_controller.rb

@@ -0,0 +1,41 @@
+class Api::V1::CatsController < ApplicationController
+
+  def index
+    name = params[:name]
+    breed = params[:breed]
+    if breed
+      @cats = Cat.search_breed(breed)
+    else
+      @cats = Cat.all
+    end
+    json_response(@cats)
+  end
+
+  def create
+    @cat = Cat.create!(cat_params)
+    json_response(@cat, :created)
+  end
+
+  def update
+    @cat = Cat.find(params[:id])
+    if @cat.update!(cat_params)
+      render status: 200, json {
+        message: "Your cat has been updated successfully!"
+      }
+    end
+  end
+
+  def destroy
+    @cat = Cat.find(params[:id])
+    if @cat.destroy!
+      render status: 200, json: {
+        message: "This cat is no longer available for adoption. "
+      }
+    end
+  end 
+
+private
+  def cat_params
+    params.permit(:name, :breed)
+  end
+end