fga-gpp-mds/2017.1-Escola-X

class ReaderController < ApplicationController 
    include SessionsHelper
    include ReaderHelper
    
    def index
        if ( logged_in? and is_principal? )
            bar_code = params[:bar_code]

            date = mountCurrentDate()    

            @alumn = nil
            @alumn = Alumn.find_by_bar_code bar_code

            give_presence_to_alumn(date , @alumn)
        else
              redirect_to "/errors/error_500"
        end
    end

    private 
    def give_presence_to_alumn(date , alumn)
        
        school_misses = nil
        if (alumn != nil)
            school_misses = alumn.school_misses.all
        else
            # nothing to do in here
        end
        
        if (school_misses != nil)
            for school_miss in school_misses
            
                if (school_miss.date.to_s == date.to_s)
                    school_miss.destroy
                else
                    # nothing to do in here
                end    
            end

        end
    end
    
    TWO_POINTS = ":"
    DATE_SPACE = "/"
    SPACE_TRACE_SPACE = "-"
    ADJUSTING_FUSE_TO_BRAZILIAN = 3;
    ZERO = "0";
    SINGLE_CHAR = 1


    def mountCurrentDate() 
    
         #hour = (Time.current.hour - ADJUSTING_FUSE_TO_BRAZILIAN).to_s
         #minute = Time.current.min .to_s
         day = Time.current.day.to_s
         month = Time.current.month.to_s
         year = Time.current.year.to_s 

         if (month.length == SINGLE_CHAR)
             month = ZERO + month
         end

         if (day.length == SINGLE_CHAR)
             day = ZERO + day
         end

         correctDate = year + SPACE_TRACE_SPACE + month + SPACE_TRACE_SPACE + day 
        return correctDate.to_s
    end
end