feat: Add Platform APIs (#1456)

app/controllers/platform/api/v1/users_controller.rb

@@ -0,0 +1,43 @@
+class Platform::Api::V1::UsersController < PlatformController
+  # ref: https://stackoverflow.com/a/45190318/939299
+  # set resource is called for other actions already in platform controller
+  # we want to add login to that chain as well
+  before_action(only: [:login]) { set_resource }
+  before_action(only: [:login]) { validate_platform_app_permissible }
+
+  def create
+    @resource = (User.find_by(email: user_params[:email]) || User.new(user_params))
+    @resource.confirm
+    @resource.save!
+    @platform_app.platform_app_permissibles.find_or_create_by(permissible: @resource)
+    render json: @resource
+  end
+
+  def login
+    render json: { url: "#{ENV['FRONTEND_URL']}/app/login?email=#{@resource.email}&sso_auth_token=#{@resource.generate_sso_auth_token}" }
+  end
+
+  def show
+    render json: @resource
+  end
+
+  def update
+    @resource.update!(user_params)
+    render json: @resource
+  end
+
+  def destroy
+    # TODO: obfusicate user
+    head :ok
+  end
+
+  private
+
+  def set_resource
+    @resource = User.find(params[:id])
+  end
+
+  def user_params
+    params.permit(:name, :email, :password)
+  end
+end