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#!/usr/bin/env ruby

require "net/http"
require "uri"
require "json"
require "base64"
require "optparse"
require "yaml"

options = {}

option_parser = OptionParser.new do |opts|
  opts.banner = "Create your bearer_token for twitter by including following two [options], feel free to have your secrets-file created/filled giving the other information as well:"

  opts.on("--key KEY", "consumer_key of your twitter application") do |key|
    options[:conkey] = key
  end

  opts.on("--secret SECRET", "consumer_secret of your twitter application") do |secret|
    options[:consec] = secret
  end

  opts.on("--projectroot DIR", "directory where leapweb is") do |projectroot|
    options[:projectroot] = projectroot
  end

  opts.on("--twitterhandle TWI", "twitterhandle without @ which will be passed into secrets-file") do |twitterhandle|
    options[:twitterhandle] = twitterhandle
  end

end

option_parser.parse!

if options[:conkey].nil? || options[:consec].nil? then
  puts option_parser
  exit
else
  consumer_key = options[:conkey]
  consumer_secret = options[:consec]
end

uri = URI("https://api.twitter.com/oauth2/token")
data = "grant_type=client_credentials"
cre   = Base64.strict_encode64("#{consumer_key}:#{consumer_secret}")
authorization_headers = { "Authorization" => "Basic #{cre}"}

Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
  response = http.request_post(uri, data, authorization_headers)
  token_hash = JSON.parse(response.body)
  $bearer_token = token_hash["access_token"]
end

if options[:projectroot].nil? then
  puts "You didn't tell us the directory to have your secrets-file created or being filled. Feel free to copy/paste your bearer_token:"
  puts $bearer_token
else
  if File.exist?("#{options[:projectroot]}/leap_web/config/secrets.yml")
    secrets = YAML.load_file("#{options[:projectroot]}/leap_web/config/secrets.yml")
  else
    # secrets_content = {"twitter"=>{"enabled"=>false, "twitter_handle"=>"", "bearer_token"=>"", "twitter_picture"=>nil}}
    # secrets = {"development"=> secrets_content, "test"=>secrets_content}
    secrets = {"development"=> {"twitter"=>{"enabled"=>false, "twitter_handle"=>"", "bearer_token"=>"", "twitter_picture"=>nil}}, "test"=>{"twitter"=>{"enabled"=>false, "twitter_handle"=>"", "bearer_token"=>"", "twitter_picture"=>nil}}}
    File.new("#{options[:projectroot]}/leap_web/config/secrets.yml", "w")
  end

  if options[:twitterhandle].nil? then
    if secrets["development"]["twitter"]["twitter_handle"] == "" then
      puts "You didn't put your twitter-handle neither in the secrets-file nor passed it as a flag. Don't forget that you can't use the twitter-feature without your twitter-handle."
    end
  else
    secrets["development"]["twitter"]["twitter_handle"] = options[:twitterhandle]
  end

  secrets["development"]["twitter"]["bearer_token"] = $bearer_token
  secrets["test"]["twitter"]["bearer_token"] = $bearer_token

  File.open("#{options[:projectroot]}/leap_web/config/secrets.yml", "r+") do |file|
    file.write(secrets.to_yaml)
  end
end