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September 11, 2024 13:46
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Email merge script in ruby
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| #!/usr/bin/env ruby | |
| # Encoding: utf-8 | |
| # | |
| # This takes a csv file of values, and a txt file as a template | |
| # and sends out a pile of customized emails. | |
| # | |
| require 'csv' | |
| require 'mail' | |
| class EmailMerge | |
| def initialize(data_file, template_file) | |
| @data = parse_data(data_file) | |
| @subject, @body = parse_template(template_file) | |
| @from = "example@example.com" | |
| @to_field = "email" | |
| end | |
| def from=(email) | |
| @from = email | |
| end | |
| def to_field=(field_name) | |
| @to_field = field_name | |
| end | |
| def to(data) | |
| data[@to_field] | |
| end | |
| def recipients | |
| @data.map{|data| data[@to_field] } | |
| end | |
| def preview(n=1) | |
| @data[0..n-1].each do |data| | |
| puts "-"*80 | |
| puts "Subject: "+ render(@subject, data) | |
| puts "-"*80 | |
| puts render(@body, data) | |
| puts "-"*80 | |
| end | |
| end | |
| def render(template, data) | |
| text = template.dup | |
| text.gsub(/{{(.+?)}}/) do |match| | |
| var = match.gsub(/{{/,'').gsub(/}}/,'') | |
| data[var] | |
| end | |
| end | |
| def deliver_all!(opts={}) | |
| @data.each do |data| | |
| mail(data, opts) | |
| end | |
| end | |
| def deliver_n!(n=1, opts={}) | |
| @data[0..n-1].each do |data| | |
| mail(data, opts) | |
| end | |
| end | |
| # you can override :from, :to, :subject, :body, with opts | |
| def mail(data, opts={}) | |
| mail = Mail.new | |
| mail.delivery_method :sendmail | |
| mail.charset = 'UTF-8' | |
| mail.content_transfer_encoding = "8bit" | |
| mail.content_type = 'text/html' | |
| mail.from = opts[:from] || @from | |
| mail.to = opts[:to] || data[@to_field] | |
| mail.subject = opts[:subject] || self.render(@subject, data) | |
| mail.body = opts[:body] || self.render(@body, data) | |
| ok = mail.deliver! | |
| p [ok, mail] | |
| end | |
| private | |
| def parse_template(template_file) | |
| text = File.readlines(template_file) | |
| [ | |
| text.shift.gsub(/Subject:\s+/i,'').strip, | |
| text.join.strip | |
| ] | |
| end | |
| # reads file, returns array of hashes based on the header | |
| def parse_data(data_file) | |
| data = [] | |
| headers = nil | |
| CSV.open(data_file).each do |row| | |
| if headers.nil? | |
| headers = row | |
| else | |
| data << Hash[*headers.zip(row).flatten] | |
| end | |
| end | |
| data | |
| end | |
| end | |
| if $0 == __FILE__ | |
| base_dir = "data/campaign_20140314" | |
| data_file = "#{base_dir}/data.csv" | |
| template_file = "#{base_dir}/template.html" | |
| em = EmailMerge.new(data_file, template_file) | |
| em.from = "example@example.com" | |
| em.to_field = "email" | |
| testing = true | |
| if testing | |
| em.preview 1 # show a few | |
| puts em.recipients # show were they'd go if we ran it for real | |
| em.deliver_n!(n=1, to: 'example@example.com') # test deliver a few | |
| end | |
| # DO IT FOR REAL, CAREFUL! TEST FIRST | |
| #em.deliver_all!(to: 'example@example.com') | |
| #em.deliver_all! | |
| end |
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