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# frozen_string_literal: true
module ActionMailer
# Provides helper methods for ActionMailer::Base that can be used for easily
# formatting messages, accessing mailer or message instances, and the
# attachments list.
module MailHelper
# Take the text and format it, indented two spaces for each line, and
# wrapped at 72 columns:
#
# text = <<-TEXT
# This is
# the paragraph.
#
# * item1 * item2
# TEXT
#
# block_format text
# # => " This is the paragraph.\n\n * item1\n * item2\n"
def block_format(text)
formatted = text.split(/\n\r?\n/).collect { |paragraph|
format_paragraph(paragraph)
}.join("\n\n")
# Make list points stand on their own line
output = +""
splits = formatted.split(/(\*+|\#+)/)
while line = splits.shift
if line.start_with?("*", "#") && splits.first&.start_with?(" ")
output.chomp!(" ") while output.end_with?(" ")
output << " #{line} #{splits.shift.strip}\n"
else
output << line
end
end
output
end
# Access the mailer instance.
def mailer
@_controller
end
# Access the message instance.
def message
@_message
end
# Access the message attachments list.
def attachments
mailer.attachments
end
# Returns +text+ wrapped at +len+ columns and indented +indent+ spaces.
# By default column length +len+ equals 72 characters and indent
# +indent+ equal two spaces.
#
# my_text = 'Here is a sample text with more than 40 characters'
#
# format_paragraph(my_text, 25, 4)
# # => " Here is a sample text with\n more than 40 characters"
def format_paragraph(text, len = 72, indent = 2)
sentences = [[]]
text.split.each do |word|
if sentences.first.present? && (sentences.last + [word]).join(" ").length > len
sentences << [word]
else
sentences.last << word
end
end
indentation = " " * indent
sentences.map! { |sentence|
"#{indentation}#{sentence.join(' ')}"
}.join "\n"
end
end
end
|
