Let User Claim Seat

app/controllers/application_controller.rb

@@ -1,3 +1,6 @@
 class ApplicationController < ActionController::Base
+
+  include SessionsHelper
+
   protect_from_forgery with: :exception
 end

app/controllers/rides_controller.rb

@@ -14,6 +14,7 @@ def new
   end
 
   def create
+    @ride = Ride.new(ride_params)
     if @ride.save
       respond_to do |format|
         format.html { redirect_to ride_path(@ride) }
@@ -39,17 +40,34 @@ def edit
   end
 
   def update
+    if @ride.add_passenger(current_user)
+      respond_to do |format|
+        format.html { redirect_to ride_path(@ride) }
+        format.json { render json: @ride }
+      end
+    else
+      flash[:alert] = "Unable to join the ride because it is full"
+      respond_to do |format|
+        format.html { redirect_to ride_path(@ride) }
+        format.json { render json: @ride }
+      end
+    end
   end
 
   def destroy
   end
 
   private
-    def set_user
+    def set_ride
       @ride = Ride.find(params[:id])
     end
 
     def ride_params
-      params.require(:ride).permit(:max_seats, :max_range, :start_point, :end_point, :start_time, :driver_id)
+      params.require(:ride).permit(:max_seats,
+                                   :max_range,
+                                   :start_point,
+                                   :end_point,
+                                   :start_time,
+                                   :driver_id)
     end
 end

app/models/ride.rb

@@ -2,4 +2,17 @@ class Ride < ApplicationRecord
   belongs_to :driver, class_name: :User, dependent: :destroy
   has_many :passenger_rides
   has_many :passengers, through: :passenger_rides
+
+  def add_passenger(new_passenger)
+    if !self.is_full?
+      self.passengers << new_passenger
+      true
+    else
+      false
+    end
+  end
+
+  def is_full?
+     self.passengers.count == self.max_seats ? true : nil
+  end
 end

app/views/rides/show.html.haml

@@ -1,3 +1,13 @@
 %h1 Your Ride
 
-= @ride.end_point
+
+= "Driver: #{@ride.driver.first_name}"
+%br
+= "Destination: #{@ride.end_point}"
+%br
+= "Seats avaialable: #{@ride.passengers.count}/#{@ride.max_seats}"
+%br
+= link_to(@ride, {}, {method: :put})
+%br
+- if flash[:alert]
+  = flash[:alert]