Class: CF::InputValidator

Inherits:
Object
  • Object
show all
Includes:
ValidatorHelpers
Defined in:
lib/cf/input_validator.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(rules) ⇒ InputValidator

Returns a new instance of InputValidator.



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# File 'lib/cf/input_validator.rb', line 13

def initialize(rules)
  @errors = []
  @rules = rules
  @invalid_units, @temp_units, @valid_units = [], [], []
end

Instance Attribute Details

#errors ⇒ Object

Returns the value of attribute errors.



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# File 'lib/cf/input_validator.rb', line 11

def errors
  @errors
end

#rules ⇒ Object

Returns the value of attribute rules.



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# File 'lib/cf/input_validator.rb', line 11

def rules
  @rules
end

Class Method Details

.check_extension(file_location) ⇒ Object 



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# File 'lib/cf/input_validator.rb', line 19

def self.check_extension(file_location)
  @error = []
  ext = File.extname(file_location).sub(/./,"")  
  formats = %w[csv xls xlsx ods]
  check = formats.include?(ext)

  @error << "Invalid file! The specified format is not supported." unless check
  {:check => check, :error => @error}
end

Instance Method Details

#parse_and_validate(inputs) ⇒ Object

returns a hash of arrays with two keys :valid_units and :invalid_units => @valid_units, :invalid_units => @invalid_units



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# File 'lib/cf/input_validator.rb', line 31

def parse_and_validate(inputs)
  csv_contents = FasterCSV.parse(inputs)
  csv_header = csv_contents[0].map{|a| a.strip unless a.nil? }

  # Initialize rule_labels array and store labels of RULE_HEADERS into it
  rule_labels = Array.new
  @rules.each do |rule|
    label = rule[:label] || rule["label"]
    rule_labels << label.strip
  end
  
  if rule_labels == csv_header
    csv_contents[1..-1].each do |item|
      # Validation.
      rules.each_with_index do |header, index|
        next unless item # Escape nil items. This may result while reading csv file with blank line

        unless (item = item.select{|x| !x.blank? }).empty?
          item[index].strip! if !item[index].nil?
          option_header_required = header[:required] || header["required"]
          option_validation_format = header[:validation_format] || header["validation_format"]
          if required(option_header_required, item[index]) and valid(option_validation_format, item[index])
            # temporarily store valid units into temp_units array
            @temp_units << item unless @temp_units.include?(item)
          else
            # Note:: While validating input data, collect invalid row(data) and process the others.
            # Display invalid data to user later
            @invalid_units << item unless @invalid_units.include?(item)
          end
        end
      end

    end
  else
    @errors << "Headers doesnot match the column counts: Rule => #{rule_labels} against CSV => #{csv_header}"
  end

  # calculate valid_units
  @valid_units = @temp_units - @invalid_units

  {:valid_units => @valid_units, :invalid_units => @invalid_units}
end