Issue alaashafaee#210 Adding helping hints

tutor/app/controllers/hints_controller.rb

@@ -0,0 +1,44 @@
+class HintsController < ApplicationController
+
+	@@answer_id = nil
+
+	# [Adding Helping Hints - 4.12]
+	# Creates a new record to Hint Table
+	# Parameters:
+	# 	owner_id: ID of the hint owner
+	# 	owner type: type of hint owner
+	# 	category: states whether it is a hint or tip
+	# Returns: Redirects to edit page on success, refreshes on failure
+	# Author: Mohamed Fadel
+	def create
+		p = Hint.new(permitCreate)
+		if lecturer_signed_in?
+			p.owner_id = current_lecturer.id
+			p.owner_type = "lecturer"
+			p.category = false
+			p.model_answer_id = @@answer_id
+		else
+			p.owner_id = current_teaching_assistant.id
+			p.owner_type = "teaching_assistant"
+			p.category = false
+			p.model_answer_id = @@answer_id
+		end
+
+		if p.save
+			redirect_to :controller => 'model_answers', :action => 'edit', :id => @@answer_id
+		else 
+			flash.keep[:notice] = "Hint is missing paramaters"
+			redirect_to :back
+		end
+	end
+
+	# [Adding Helping Hints - 4.12]
+	# Passes the input of the form as paramaters for create action to use it
+	# Parameters:
+	#   submission_counter: hint's submission counter
+	#   message: hint's message
+	# Returns: params to create action
+	# Author: Mohamed Fadel
+	def permitCreate
+		params.require(:Hint).permit(:submission_counter, :message)
+	end

tutor/app/views/hints/new.html.erb

@@ -0,0 +1,21 @@
+<h1 align ="center">Add a Hint</h1>
+<br>
+<!--A form that takes the input for the model Hint and calls the action create
+  through two text fields :title and description -->
+<%= form_for :Hint, url: {action: "create"} do |p| %>
+	<p>
+		<%= p.label :submission_counter %><br>
+		<%= p.text_field :submission_counter %>
+	</p>
+	<p>
+		<%= p.label :message  %><br>
+		<%= p.text_area :message , :cols => "50", :rows => "10" %>
+	</p>
+	<p>
+		<%= p.submit %>
+	</p>
+<% end %>
+<!-- A division for the flash message output to view the action's output --> 
+<% if flash[:notice] %>
+	<div class="notice"><%= flash[:notice] %></div>
+<% end %>