outlook.rb

# Copyright (c) 2009, 2013 Chris Mear <chris@feedmechocolate.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.



  contacts = []
  
  catch :invalid_contacts_format do
    # Detect the line ending
    c = ""
    until c == "\r"[0] || c == "\n"[0] || c.nil?
      c = data.getc
    end
    line_ending = nil
    if c
      c = c.chr
      n = data.getc
      if n == "\r"[0] || n == "\n"[0]
        n = n.chr
        line_ending = c + n
      else
        line_ending = c
      end
    else
      line_ending = c
    end
    throw :invalid_contacts_format unless line_ending
    
    data.rewind
  
    # Guess whether this is a comma-separated or tab-delimited file
    header_line = data.gets(line_ending)
    tab_count = header_line.count("\t")
    comma_count = header_line.count(',')
    if tab_count > comma_count
      Rails.logger.info("Parsing tab-delimited values with #{line_ending.inspect} line endings.")
      field_separator = "\t"
    else
      Rails.logger.info("Parsing comma-separated values with #{line_ending.inspect} line endings.")
      field_separator = ','
    end
    
    begin
      header_row = CSV::parse_line(header_line, field_separator, line_ending)
    rescue CSV::IllegalFormatError
      throw :invalid_contacts_format
    end
    
    first_name_index = header_row.index('First Name')
    last_name_index = header_row.index('Last Name')
  
    email_indices = []
    [
      # Outlook CSV headers
      'E-mail Address',
      'E-mail 2 Address',
      'E-mail 3 Address',
      # Entourage TSV headers
      'Email Address 1',
      'Email Address 2',
      'Email Address 3',
      'Email Address 4',
      'Email Address 5',
      'Email Address 6',
      'Email Address 7',
      'Email Address 8',
      'Email Address 9',
      'Email Address 10',
      'Email Address 11',
      'Email Address 12',
      'Email Address 13'
    
    ].each do |column_name|
      index = header_row.index(column_name)
      email_indices.push(index) if index
    end
    
    throw :invalid_contacts_format unless (first_name_index && last_name_index && !email_indices.empty?)
    
    while line = data.gets(line_ending)
      begin
        row = CSV.parse_line(line, field_separator, line_ending)
        name = []
        name.push(row[first_name_index].to_s)
        name.push(row[last_name_index].to_s)
        name = name.join(' ')
        email = nil
        email_indices.each do |email_index|
          unless email
            email = row[email_index]
          end
        end
        contacts.push({:email => email, :name => name}) unless email.blank?
      rescue CSV::IllegalFormatError
      end
    end
  end