class Gistal

# File lib/gistal.rb, line 6
def initialize(config_fielname)
  load_config(config_fielname)
end

# File lib/gistal.rb, line 44
def chmod(fullpath, mod)
  return if mod.nil? || mod.empty?

  puts "- changing #{File.basename(fullpath)} => #{mod}"
  `chmod #{mod} "#{fullpath}"`
end

# File lib/gistal.rb, line 34
def get_gist(config)
  puts "Processing [#{config['name']}](#{config['id']})"
  JSON.parse `curl -s https://api.github.com/gists/#{config['id']}`
end

# File lib/gistal.rb, line 51
def get_relative_path(first, second = @home_path)
  Pathname.new(first).relative_path_from(Pathname.new(second))
end

# File lib/gistal.rb, line 10
def load_config(filename)
  @config = YAML.load_file(filename)
  @home_path = File.dirname(filename)
  @lock = File.join(@home_path, 'gistr.lock')
end

# File lib/gistal.rb, line 16
def parse
  @config['gists'].each do |item|
    gist_result = get_gist(item)

    item['files'].each do |file_config|
      gist_file = gist_result['files'][file_config['source']]

      dest_filename = file_config['name'] || gist_file['filename']
      dest_folder   = file_config['dest'] || item['dest'] || item['id']

      dest_fullpath = File.join(@home_path, dest_folder, dest_filename)

      write_content(file_config['source'], dest_fullpath, gist_file['raw_url'])
      chmod(dest_fullpath, file_config['chmod'])
    end
  end
end

# File lib/gistal.rb, line 39
def write_content(source, fullpath, content_url)
  puts "- saving #{source} => #{get_relative_path(fullpath)}"
  `curl -s #{content_url} --create-dirs -o "#{fullpath}"`
end