Add basic invitations

app/controllers/invitations_controller.rb

@@ -0,0 +1,33 @@
+class InvitationsController < ApplicationController
+  before_action :require_user_signed_in
+
+  # GET /invitations
+  def index
+    @invitations = current_user.invitations
+  end
+
+  # POST /invitations
+  def create
+    @invitation = Invitation.new(user: current_user)
+
+    respond_to do |format|
+      if @invitation.save
+        format.html { redirect_to @invitation, notice: 'Invitation was successfully created.' }
+        format.json { render :show, status: :created, location: @invitation }
+      else
+        format.html { render :new }
+        format.json { render json: @invitation.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /invitations/1
+  def destroy
+    @invitation = current_user.invitations.find(params[:id])
+    @invitation.destroy
+    respond_to do |format|
+      format.html { redirect_to invitations_url }
+      format.json { head :no_content }
+    end
+  end
+end