Slack Paste

example.txt

$ cat transcript | pbcopy
$ ./slackpaste.rb 
alice: this is a test
alice: this is another line from alice
bob: this is bob chiming in
jerry: this is tomorrow!
jerry: another graet line from jerry
$ ./slackpaste.rb -x
$ pbpaste
alice: this is a test
alice: this is another line from alice
bob: this is bob chiming in
jerry: this is tomorrow!
jerry: another graet line from jerry

slackpaste.rb

#!/usr/bin/env ruby

require 'fileutils'

FORMAT = "{{author}}: {{message}}"
TIMESTAMP_RE = /\[[0-9:A-Z ]+\]/
DAY_MARKER_RE = /(-){5}[^-]+(-){5}/

input = `pbpaste`
last_author = "???"

lines = input.
  split(/\n/).
  reject{|line| line =~ DAY_MARKER_RE}.
  join("\n").
  split(/\n\n/).
  map(&:strip).map do |line|
  if line =~ TIMESTAMP_RE
    words = line.split(TIMESTAMP_RE).map(&:strip)
    author = last_author
    if words.size == 2 && !words[0].empty?
      last_author = words[0]
      message = words[1]
    elsif words.size == 1
      message = words[0]
    else
      message = words[1]
    end
    {:author=>last_author, :message=>message}
  end
end
if lines.compact.empty?
  $stderr.puts "Bailing!"
  exit 1
end
paste = lines.map {|line|
  output = FORMAT.dup
  line.each do |k, v|
    output = output.gsub(/{{#{k}}}/, v)
  end
  output
}.join("\n")
if ARGV[0] == "-x"
  tmp = "/tmp/#{$$}.tmp"
  fh = File.open(tmp, "w")
  fh.puts(paste)
  fh.close
  `cat #{tmp} | pbcopy`
  FileUtils.rm(tmp)
else
  puts paste
end

transcript.txt

alice [3:00 PM]  
this is a test

[3:00]  
this is another line from alice

bob [3:00 PM]  
this is bob chiming in


----- Today November 23rd, 2016 -----
jerry [9:54 AM]  
this is tomorrow!

[9:54]  
another graet line from jerry