Module: CsvClassMaker::CsvFind::ClassMethods

Defined in:
lib/csv_class_maker/csv_find.rb

Instance Method Summary collapse

Instance Method Details

#all ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 53

def all
  rewind
  file.map { |row| build_instance(row, file.lineno) }
end

#csv_file(file_name, options = {}) ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 29

def csv_file(file_name, options = {})
  @file_options = options
  @file = CSV.new(File.open(file_name, 'r'), @file_options)
  @first_line = 2
  @last_line = `wc -l #{file_name}`.split(' ').first.to_i
  @middle_line = (@last_line/2)+1
  @line_number = nil
  extract_headers(file_name, options)
  define_accessors
end

#define_accessors ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 47

def define_accessors
  headers.each do |header|
    self.send(:attr_accessor, header)
  end
end

#each ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 88

def each
  rewind
  (first_line..last_line).each do |line_number|
    yield find(line_number)
  end
end

#file ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 41

def file; return @file; end

#file_options ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 45

def file_options; return @file_options; end

#find(line_number) ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 67

def find(line_number)
  row = if (first_line..middle_line).include? line_number
    front_find(line_number, file.path)
  elsif (middle_line..last_line).include? line_number
    back_find(line_number, file.path)
  end

  row.nil? ? row : build_instance(row, line_number)
end

#find_all_by(key_val_pair) ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 63

def find_all_by(key_val_pair)
  search(key_val_pair).map { |row| build_instance(row, row[:line_number]) }
end

#find_by(key_val_pair) ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 58

def find_by(key_val_pair)
  row = search(key_val_pair).last
  build_instance(row, row[:line_number])
end

#first ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 77

def first
  rewind
  build_instance(file.first, first_line)
end

#first_line ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 42

def first_line; return @first_line; end

#headers ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 40

def headers; return @headers; end

#last ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 82

def last
  command = `head -n 1 #{file.path} && tail -n 1 #{file.path}`
  last_row = CSV.new(command, file_options).first
  build_instance(last_row, last_line)
end

#last_line ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 44

def last_line; return @last_line; end

#middle_line ⇒ Object 



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# File 'lib/csv_class_maker/csv_find.rb', line 43

def middle_line; return @middle_line; end