Class: Roo::Base

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/roo/base.rb

Overview

Base class for all other types of spreadsheets

Direct Known Subclasses

CSV, Excel, Excel2003XML, Excelx, Google, OpenOffice

Constant Summary collapse

TEMP_PREFIX = 
"oo_"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filename, options = {}, file_warning = :error, tmpdir = nil) ⇒ Base

Returns a new instance of Base.



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# File 'lib/roo/base.rb', line 48

def initialize(filename, options={}, file_warning=:error, tmpdir=nil)
  @filename = filename
  @options = options

  @cell = {}
  @cell_type = {}
  @cells_read = {}

  @first_row = {}
  @last_row = {}
  @first_column = {}
  @last_column = {}

  @header_line = 1
  @default_sheet = self.sheets.first
  @header_line = 1
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args) ⇒ Object

when a method like spreadsheet.a42 is called convert it to a call of spreadsheet.cell(‘a’,42)



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# File 'lib/roo/base.rb', line 372

def method_missing(m, *args)
  # #aa42 => #cell('aa',42)
  # #aa42('Sheet1')  => #cell('aa',42,'Sheet1')
  if m =~ /^([a-z]+)(\d)$/
    col = Roo::Base.letter_to_number($1)
    row = $2.to_i
    if args.empty?
      cell(row,col)
    else
      cell(row,col,args.first)
    end
  else
    super
  end
end

Instance Attribute Details

#default_sheet ⇒ Object

Returns the value of attribute default_sheet.



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# File 'lib/roo/base.rb', line 21

def default_sheet
  @default_sheet
end

#header_line ⇒ Object

sets the line with attribute names (default: 1)



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# File 'lib/roo/base.rb', line 24

def header_line
  @header_line
end

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/roo/base.rb', line 21

def headers
  @headers
end

Instance Method Details

#column(columnnumber, sheet = nil) ⇒ Object

returns all values in this column as an array column numbers are 1,2,3,… like in the spreadsheet



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# File 'lib/roo/base.rb', line 273

def column(columnnumber,sheet=nil)
  if columnnumber.class == String
    columnnumber = Roo::Excel.letter_to_number(columnnumber)
  end
  sheet ||= @default_sheet
  read_cells(sheet)
  first_row(sheet).upto(last_row(sheet)).map do |row|
    cell(row,columnnumber,sheet)
  end
end

#each(options = {}) ⇒ Object

you can also pass in a :clean => true option to strip the sheet of odd unicode characters and white spaces around columns



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# File 'lib/roo/base.rb', line 425

def each(options={})
  if options.empty?
    1.upto(last_row) do |line|
      yield row(line)
    end
  else
    if options[:clean]
      options.delete(:clean)
      @cleaned ||= {}
      @cleaned[@default_sheet] || clean_sheet(@default_sheet)
    end

    if options[:header_search]
      @headers = nil
      @header_line = row_with(options[:header_search])
    elsif [:first_row,true].include?(options[:headers])
      @headers = []
      row(first_row).each_with_index {|x,i| @headers << [x,i + 1]}
    else
      set_headers(options)
    end

    headers = @headers ||
      Hash[(first_column..last_column).map do |col|
        [cell(@header_line,col), col]
      end]

    @header_line.upto(last_row) do |line|
      yield(Hash[headers.map {|k,v| [k,cell(line,v)]}])
    end
  end
end

#each_with_pagename ⇒ Object

iterate through all worksheets of a document



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# File 'lib/roo/base.rb', line 396

def each_with_pagename
  self.sheets.each do |s|
    yield sheet(s,true)
  end
end

#empty?(row, col, sheet = nil) ⇒ Boolean

true if cell is empty

Returns:

  • (Boolean) 


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# File 'lib/roo/base.rb', line 309

def empty?(row, col, sheet=nil)
  sheet ||= @default_sheet
  read_cells(sheet)
  row,col = normalize(row,col)
  contents = cell(row, col, sheet)
  !contents || (celltype(row, col, sheet) == :string && contents.empty?) \
    || (row < first_row(sheet) || row > last_row(sheet) || col < first_column(sheet) || col > last_column(sheet))
end

#find(*args) ⇒ Object

find a row either by row number or a condition Caution: this works only within the default sheet -> set default_sheet before you call this method (experimental. see examples in the test_roo.rb file)



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# File 'lib/roo/base.rb', line 219

def find(*args) # :nodoc
  options = (args.last.is_a?(Hash) ? args.pop : {})
  result_array = options[:array]
  header_for = Hash[1.upto(last_column).map do |col|
    [col, cell(@header_line,col)]
  end]
  #-- id
  if args[0].class == Fixnum
    rownum = args[0]
    if @header_line
      [Hash[1.upto(self.row().size).map {|j|
        [header_for.fetch(j), cell(rownum,j)]
      }]]
    else
      self.row(rownum).size.times.map {|j|
        cell(rownum,j + 1)
      }
    end
  #-- :all
  elsif args[0] == :all
    rows = first_row.upto(last_row)

    # are all conditions met?
    if (conditions = options[:conditions]) && !conditions.empty?
      column_with = header_for.invert
      rows = rows.select do |i|
        conditions.all? { |key,val| cell(i,column_with[key]) == val }
      end
    end

    rows.map do |i|
      if result_array
        self.row(i)
      else
        Hash[1.upto(self.row(i).size).map do |j|
          [header_for.fetch(j), cell(i,j)]
        end]
      end
    end
  end
end

#first_column(sheet = nil) ⇒ Object

returns the number of the first non-empty column



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# File 'lib/roo/base.rb', line 122

def first_column(sheet=nil)
  sheet ||= @default_sheet
  read_cells(sheet)
  if @first_column[sheet]
    return @first_column[sheet]
  end
  impossible_value = 999_999 # more than a spreadsheet can hold
  result = impossible_value
  @cell[sheet].each_pair {|key,value|
    x = key.last.to_i # _to_string(key).split(',')
    result = [result, x].min if value
  } if @cell[sheet]
  result = nil if result == impossible_value
  @first_column[sheet] = result
  result
end

#first_column_as_letter(sheet = nil) ⇒ Object

first non-empty column as a letter



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# File 'lib/roo/base.rb', line 76

def first_column_as_letter(sheet=nil)
  Roo::Base.number_to_letter(first_column(sheet))
end

#first_row(sheet = nil) ⇒ Object

returns the number of the first non-empty row



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# File 'lib/roo/base.rb', line 86

def first_row(sheet=nil)
  sheet ||= @default_sheet
  read_cells(sheet)
  if @first_row[sheet]
    return @first_row[sheet]
  end
  impossible_value = 999_999 # more than a spreadsheet can hold
  result = impossible_value
  @cell[sheet].each_pair {|key,value|
    y = key.first.to_i # _to_string(key).split(',')
    result = [result, y].min if value
  } if @cell[sheet]
  result = nil if result == impossible_value
  @first_row[sheet] = result
  result
end

#info ⇒ Object

returns information of the spreadsheet document and all sheets within this document.



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# File 'lib/roo/base.rb', line 320

def info
  without_changing_default_sheet do
    result = "File: #{File.basename(@filename)}\n"+
      "Number of sheets: #{sheets.size}\n"+
      "Sheets: #{sheets.join(', ')}\n"
    n = 1
    sheets.each {|sheet|
      self.default_sheet = sheet
      result << "Sheet " + n.to_s + ":\n"
      unless first_row
        result << "  - empty -"
      else
        result << "  First row: #{first_row}\n"
        result << "  Last row: #{last_row}\n"
        result << "  First column: #{Roo::Base.number_to_letter(first_column)}\n"
        result << "  Last column: #{Roo::Base.number_to_letter(last_column)}"
      end
      result << "\n" if sheet != sheets.last
      n += 1
    }
    result
  end
end

#last_column(sheet = nil) ⇒ Object

returns the number of the last non-empty column



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# File 'lib/roo/base.rb', line 140

def last_column(sheet=nil)
  sheet ||= @default_sheet
  read_cells(sheet)
  if @last_column[sheet]
    return @last_column[sheet]
  end
  impossible_value = 0
  result = impossible_value
  @cell[sheet].each_pair {|key,value|
    x = key.last.to_i # _to_string(key).split(',')
    result = [result, x].max if value
  } if @cell[sheet]
  result = nil if result == impossible_value
  @last_column[sheet] = result
  result
end

#last_column_as_letter(sheet = nil) ⇒ Object

last non-empty column as a letter



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# File 'lib/roo/base.rb', line 81

def last_column_as_letter(sheet=nil)
  Roo::Base.number_to_letter(last_column(sheet))
end

#last_row(sheet = nil) ⇒ Object

returns the number of the last non-empty row



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# File 'lib/roo/base.rb', line 104

def last_row(sheet=nil)
  sheet ||= @default_sheet
  read_cells(sheet)
  if @last_row[sheet]
    return @last_row[sheet]
  end
  impossible_value = 0
  result = impossible_value
  @cell[sheet].each_pair {|key,value|
    y = key.first.to_i # _to_string(key).split(',')
    result = [result, y].max if value
  } if @cell[sheet]
  result = nil if result == impossible_value
  @last_row[sheet] = result
  result
end

#parse(options = {}) ⇒ Object 



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# File 'lib/roo/base.rb', line 458

def parse(options={})
  ary = []
  if block_given?
    each(options) {|row| ary << yield(row)}
  else
    each(options) {|row| ary << row}
  end
  ary
end

#reload ⇒ Object

reopens and read a spreadsheet document



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# File 'lib/roo/base.rb', line 302

def reload
  ds = @default_sheet
  reinitialize
  self.default_sheet = ds
end

#row(rownumber, sheet = nil) ⇒ Object

returns all values in this row as an array row numbers are 1,2,3,… like in the spreadsheet



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# File 'lib/roo/base.rb', line 263

def row(rownumber,sheet=nil)
  sheet ||= @default_sheet
  read_cells(sheet)
  first_column(sheet).upto(last_column(sheet)).map do |col|
    cell(rownumber,col,sheet)
  end
end

#row_with(query, return_headers = false) ⇒ Object 



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# File 'lib/roo/base.rb', line 468

def row_with(query,return_headers=false)
  query.map! {|x| Array(x.split('*'))}
  line_no = 0
  each do |row|
    line_no += 1
    # makes sure headers is the first part of wildcard search for priority
    # ex. if UPC and SKU exist for UPC*SKU search, UPC takes the cake
    headers = query.map do |q|
      q.map {|i| row.grep(/#{i}/i)[0]}.compact[0]
    end.compact

    if headers.length == query.length
      @header_line = line_no
      return return_headers ? headers : line_no
    elsif line_no > 100
      raise "Couldn't find header row."
    end
  end
end

#set(row, col, value, sheet = nil) ⇒ Object

set a cell to a certain value (this will not be saved back to the spreadsheet file!)



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# File 'lib/roo/base.rb', line 286

def set(row,col,value,sheet=nil) #:nodoc:
  sheet ||= @default_sheet
  read_cells(sheet)
  row, col = normalize(row,col)
  cell_type = case value
              when Fixnum then :float
              when String, Float then :string
              else
                raise ArgumentError, "Type for #{value} not set"
              end

  set_value(row,col,value,sheet)
  set_type(row,col,cell_type,sheet)
end

#sheet(index, name = false) ⇒ Object

access different worksheets by calling spreadsheet.sheet(1) or spreadsheet.sheet(‘SHEETNAME’)



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# File 'lib/roo/base.rb', line 390

def sheet(index,name=false)
  @default_sheet = String === index ? index : self.sheets[index]
  name ? [@default_sheet,self] : self
end

#to_csv(filename = nil, sheet = nil) ⇒ Object

write the current spreadsheet to stdout or into a file



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# File 'lib/roo/base.rb', line 187

def to_csv(filename=nil,sheet=nil)
  sheet ||= @default_sheet
  if filename
    File.open(filename,"w") do |file|
      write_csv_content(file,sheet)
    end
    return true
  else
    sio = StringIO.new
    write_csv_content(sio,sheet)
    sio.rewind
    return sio.read
  end
end

#to_matrix(from_row = nil, from_column = nil, to_row = nil, to_column = nil, sheet = nil) ⇒ Object

returns a matrix object from the whole sheet or a rectangular area of a sheet



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# File 'lib/roo/base.rb', line 203

def to_matrix(from_row=nil, from_column=nil, to_row=nil, to_column=nil,sheet=nil)
  require 'matrix'

  sheet ||= @default_sheet
  return Matrix.empty unless first_row

  Matrix.rows((from_row||first_row(sheet)).upto(to_row||last_row(sheet)).map do |row|
    (from_column||first_column(sheet)).upto(to_column||last_column(sheet)).map do |col|
      cell(row,col)
    end
  end)
end

#to_xml ⇒ Object

returns an XML representation of all sheets of a spreadsheet file



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# File 'lib/roo/base.rb', line 345

def to_xml
  Nokogiri::XML::Builder.new do |xml|
    xml.spreadsheet {
      self.sheets.each do |sheet|
        self.default_sheet = sheet
        xml.sheet(:name => sheet) { |x|
          if first_row and last_row and first_column and last_column
            # sonst gibt es Fehler bei leeren Blaettern
            first_row.upto(last_row) do |row|
              first_column.upto(last_column) do |col|
                unless empty?(row,col)
                  x.cell(cell(row,col),
                    :row =>row,
                    :column => col,
                    :type => celltype(row,col))
                end
              end
            end
          end
        }
      end
    }
  end.to_xml
end

#to_yaml(prefix = {}, from_row = nil, from_column = nil, to_row = nil, to_column = nil, sheet = nil) ⇒ Object

returns a rectangular area (default: all cells) as yaml-output you can add additional attributes with the prefix parameter like: oo.to_yaml(“sheet” => “1”)



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# File 'lib/roo/base.rb', line 160

def to_yaml(prefix={}, from_row=nil, from_column=nil, to_row=nil, to_column=nil,sheet=nil)
  sheet ||= @default_sheet
  result = "--- \n"
  return '' unless first_row # empty result if there is no first_row in a sheet

  (from_row||first_row(sheet)).upto(to_row||last_row(sheet)) do |row|
    (from_column||first_column(sheet)).upto(to_column||last_column(sheet)) do |col|
      unless empty?(row,col,sheet)
        result << "cell_#{row}_#{col}: \n"
        prefix.each {|k,v|
          result << "  #{k}: #{v} \n"
        }
        result << "  row: #{row} \n"
        result << "  col: #{col} \n"
        result << "  celltype: #{self.celltype(row,col,sheet)} \n"
        if self.celltype(row,col,sheet) == :time
          result << "  value: #{Roo::Base.integer_to_timestring( self.cell(row,col,sheet))} \n"
        else
          result << "  value: #{self.cell(row,col,sheet)} \n"
        end
      end
    end
  end
  result
end