Class: RTables::TableBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/rtables/tablebuilder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TableBuilder

Returns a new instance of TableBuilder.



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# File 'lib/rtables/tablebuilder.rb', line 3

def initialize
  @table_header = []
  @table_content = []

  @columns = 0
  @rows = 0
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/rtables/tablebuilder.rb', line 11

def columns
  @columns
end

#rows ⇒ Object (readonly)

Returns the value of attribute rows.



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# File 'lib/rtables/tablebuilder.rb', line 11

def rows
  @rows
end

#table_content ⇒ Object (readonly)

Returns the value of attribute table_content.



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# File 'lib/rtables/tablebuilder.rb', line 11

def table_content
  @table_content
end

#table_header ⇒ Object (readonly)

Returns the value of attribute table_header.



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# File 'lib/rtables/tablebuilder.rb', line 11

def table_header
  @table_header
end

Instance Method Details

#add_column(name) ⇒ Object 



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# File 'lib/rtables/tablebuilder.rb', line 13

def add_column(name)
  return false if column_exist?(name)
  fail TableFormatError, 'Cannot add more columns after rows have been added.' if @rows != 0

  @table_header.push(name)
  @columns += 1
  true
end

#add_row(*args) ⇒ Object 



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# File 'lib/rtables/tablebuilder.rb', line 22

def add_row(*args)
  if args.count != @columns
    fail TableFormatError, "Number of arguments passed does not equal number of columns. [#{args.count} != #{@columns}]"
  end

  @table_content.push(args)
  @rows += 1
  true
end

#column_exist?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rtables/tablebuilder.rb', line 32

def column_exist?(name)
  @table_header.include?(name)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rtables/tablebuilder.rb', line 40

def empty?
  @columns == 0 && @rows == 0
end

#inspect ⇒ Object 



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# File 'lib/rtables/tablebuilder.rb', line 56

def inspect
  "<Table columns=#{@columns} rows=#{@rows}>"
end

#raise_if_empty ⇒ Object 



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# File 'lib/rtables/tablebuilder.rb', line 36

def raise_if_empty
  fail TableFormatError, 'Table has no content to display.' if empty? || @columns == 0 || @rows == 0
end

#render ⇒ Object 



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# File 'lib/rtables/tablebuilder.rb', line 44

def render
  fail TableFormatError, 'This table does not generate any output.'
end

#to_s ⇒ Object 



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# File 'lib/rtables/tablebuilder.rb', line 48

def to_s
  raise_if_empty

  lines = render

  lines.join("\n")
end