Setup user login/logout (#21)

Reviewed-on: #21

app/controllers/sessions_controller.rb

@@ -0,0 +1,40 @@
+class SessionsController < ApplicationController
+  # GET /sessions/new
+  def new
+    @session = Session.new
+  end
+
+  # POST /sessions or /sessions.json
+  def create
+    @session = Session.new(session_params)
+
+    respond_to do |format|
+      if @session.save
+        session[:current_user_id] = @session.user_id
+        Rails.logger.info("ID: #{@session.user_id}")
+
+        format.html { redirect_to root_url, notice: "Session was successfully created." }
+        format.json { render :show, status: :created, location: @session }
+      else
+        format.html { render :new, status: :unprocessable_entity, alert: @session.errors }
+        format.json { render json: @session.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /sessions/1 or /sessions/1.json
+  def destroy
+    session[:current_user_id] = nil
+
+    respond_to do |format|
+      format.html { redirect_to root_url, notice: "Session was successfully destroyed." }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Only allow a list of trusted parameters through.
+    def session_params
+      params.require(:session).permit(:email, :password)
+    end
+end