SupplierSelection.rb

class SupplierSelection
#initialize the parameters required
  def initialize(suppliers)
    @suppliers=suppliers
    @grade_weight=0
    @works={}
    @supplier_data={}
  end

  #loading the value for the application torun.
  def load_values
    @suppliers.each do |supplier|
      name=supplier[:name]

      advaitam_grade=supplier.fetch(:advitam_grade,0)

      supplier[:works].each do |work|
        work_price=work[:price]
        work_type=work[:type]
        overall_score=(@grade_weight*advaitam_grade)+work_price


        @supplier_data.merge!(name=>advaitam_grade)


        if @works.key?(work_type)
          @works[work_type].push({name:name,overall_score:overall_score,advaitam_grade:advaitam_grade,work_price:work_price,grade_weight:grade_weight})
        else
          @works.merge!(work_type=>[{name:name,overall_score:overall_score,advaitam_grade:advaitam_grade,work_price:work_price,grade_weight:grade_weight}])
        end
      end
    end
  end

  # getter method for grade_weight
  def grade_weight
    @grade_weight
  end
  # setter method for grade_weight
  def grade_weight=(g_weight) #setter method
    @grade_weight = g_weight
    load_values
  end
  # Return the provider with the highest :overall_score
  def work(job_type)
    if @works.key?(job_type) then
      suppliers=@works[job_type]
      suppliers.max_by{|k| k[:overall_score] }
    else
      "No such Job Type"
    end
  end
  # Return all the providers sorted by :overall_score
  def work_all(job_type)
    if @works.key?(job_type)
      suppliers=@works[job_type]
      all_suppliers=suppliers.sort_by!{ |x| -x[:overall_score] }
    else
     "No such Job Type"
    end
  end
  # Return all the providers sorted by :advaitam_grade
  def suppliers
    if @supplier_data.count>0
      sups = Hash[@supplier_data.sort_by{|k, v| v}.reverse]
    else
      "invalid"
    end
  end
    # Return all the providers and available job types
  def all_data
    if @supplier_data.count>0&&@works.count>0
      sups = @supplier_data.keys
      wor = @works.keys
      Hash[sups.zip(wor.map {|i| i.include?(',') ? (i.split /, /) : i})]
    else
      "invalid"
    end
  end
  
  # Takes the input of provider name and work type
  # return the :overall_score for the provider with the work_type specified
  def supplier_grade(supplier_name, work_type)
    if @works.key?(work_type)
      suppliers1=@works[work_type]
      if suppliers1.any?{|hash| hash[:name] == supplier_name}
        suppliers1.each do |work1|

          if work1[:name]===supplier_name
            s_grade=work1
            return s_grade
          end
        end
      else
        return "No value"
      end
    else
      "invalid"
    end
  end

end


suppliers = [
    { name: "FunePlus", advitam_grade: 3, works: [ { type: "embalming", price: 350 }, {type: "transport_before_casketing", price: 450} ]},
    { name: "FuneTop", works: [ { type: "graving", price: 10 } ]},
    { name: "FuneTruc", advitam_grade: 5,works: [ { type: "embalming", price: 750 }]},
    { name: "FuneTruc1", advitam_grade: 3,works: [ { type: "embalming", price: 350 }]},
    { name: "FuneTruc2", advitam_grade: 5,works: [ { type: "embalming", price: 751 }]},
    { name: "FuneCorp", advitam_grade: 2, works: [ { type: "digging", price: 350 }]}
]
#selection = SupplierSelection.new(suppliers)
#selection.grade_weight=20
#p selection.work("embalming")
#p selection.work_all("embalming")
#p selection.suppliers
#p selection.supplier_grade("FuneTruc","embalming")
#p selection.grade_weight
puts("Loading Data............")
sleep(1)
puts("Loaded and Ready.")
sleep(1)
puts("---------------- Welcome To SupplierSelection Console Program--------------")
puts("")
sleep(1)
puts("Before going to the home page,please provide the grade_weight value.")
puts("This grade_weight can be changed any time.")
print("Enter grade_weigh = ")
a=gets.chomp
a=a.to_i
selection = SupplierSelection.new(suppliers)
selection.grade_weight =a
puts("\n---------All-Providers----------------------All-Works_Types--------------------")
s_data= selection.all_data
s_data.each do |k,v|
  print("          ",k||"","                         ",v||"","\n")
end
puts""
puts("------------------------------ Home Page-----------------------------------")

choice=1
#loops for the home page menu....
while choice!="7"  do
  puts("1. work(work_type)                             ->  returns the provider with best global_grade")
  puts("2. work_all(work_type)                         ->  returns all the providers with sorted global_grade")
  puts("3. Suppliers                                   ->  returns all the providers with best advaitam_grade")
  puts("4. supplier_grade(supplier_name, work_type)    ->  return the global_grade of the provider for a specific work_type")
  puts("5. set grade_weight                            ->  sets the grade_weight and refreshes the data")
  puts("6. Show all providers and work_types           ->  displays all the available providers and work_types.")
  puts("7. Quit                             ->  Quit the application.")

  print("please select one of the options above in 1-5 : ")
  choice=gets.chomp

  case choice
  when "1"
    print(" \n please enter a work type : ")
    work_name=gets.chomp
    sups_w=selection.work(work_name)
    if sups_w==="No such Job Type"
      puts("\n No Work Type Available.")
      sleep(2)
    else
      puts("\n Supplier_Name                       overall_score")
      puts("---------------------------------------------------")
      sleep(0.5)
      print(sups_w[:name],"                                ",sups_w[:overall_score],"\n")
      puts("---------------------------------------------------")
    end
  when "2"
    print("please enter a work type : ")
    work_name=gets.chomp
    sups_a=selection.work_all(work_name)
    if sups_a==="No such Job Type"
      puts("\n No Work Type Available.")
      sleep(2)
    else
    puts("\n Supplier_Name                       overall_score")
    puts("---------------------------------------------------")
    sups_a.each do |supplier|
      sleep(0.5)
      print(supplier[:name],"                                ",supplier[:overall_score].to_i,"\n")
      puts("---------------------------------------------------")
    end
    sleep(2)
    end
  when "3"
    sups = selection.suppliers
    if sups==="invalid"
      puts("\n No Data Available.")
      sleep(2)
    else
      puts("\n Supplier_Name                       Advaitam_Grade")
      puts("---------------------------------------------------")
      sups.each_pair do |k,v|
        print(k,"                                ",v,"\n")
        puts("---------------------------------------------------")
        sleep(0.5)
      end
      sleep(2)
    end
  when "4"
    print("\n please enter a Supplier Name : ")
    sup_name=gets.chomp
    print("\n please enter the Work_Type : ")
    work_name=gets.chomp
    sup_grade=selection.supplier_grade(sup_name,work_name)
    if sup_grade==="invalid"
      puts("\n No Supplier/work_type combination.")
      sleep(2)
      break
      end
    if sup_grade==="No value"
           puts("\n Invalid Details. Try Again.")
           sleep(2)
    else
      puts("\n Supplier_Name                       Advaitam_Grade")
      puts("---------------------------------------------------")
      sleep(0.5)
      print(sup_grade[:name],"                                ",sup_grade[:overall_score],"\n")
      puts("---------------------------------------------------")
      sleep(2)
    end
  when "5"
    print("\n Enter grade_weight (as a number) = ")
    a=gets.chomp
    a=a.to_i
    selection.grade_weight =a
    print("\n grade_weight is set to : ",a,"\n refreshing the data with new grade_weight. \n")
    sleep(2)
  when "6"
    puts("\n---------All-Providers----------------------All-Works_Types--------------------")
    s_data= selection.all_data
    s_data.each do |k,v|
      print("          ",k||"","                         ",v||"","\n")
    end
  when "7"
    puts("---------------Quitting-----------------")
  else
    puts("\n Invalid Choice!!!. Please try again.")
    sleep(1)
  end
  puts
  puts("------------------------------ Home Page-----------------------------------")
  puts
end