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path: root/client.rb
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# frozen_string_literal: true

# client-server
post '/' do
  protected!
  Time.now.strftime('%Y-%m-%dT%H:%M:%S.%N')

  recipients = public
  recipients << params[:to]

  content = []
  attachment = []
  tag = []
  extensions = {
    image: %w[jpeg png],
    audio: %w[flac wav mp3 ogg],
    video: %w[mp4 webm]
  }
  params[:content].lines.each do |line|
    line.chomp!
    if line.match(/^http/)
      ext = File.extname(line).sub('.', '')
      media_type = extensions.select { |_k, v| v.include? ext }.keys[0].to_s + '/' + ext
      attachment << {
        'type' => 'Document',
        'mediaType' => media_type,
        'url' => line
      }
    else
      tags = line.split(/\s+/).grep(/^#\w+$/)
      tags.each do |name|
        href = File.join(SOCIAL_URL, 'tags', name.sub('#', ''))
        tag << {
          'type' => 'Hashtag',
          'href' => href,
          'name' => name
        }
        line.gsub!(name, "<a href='#{href}' class='mention hashtag' rel='tag'>#{name}</a>")
      end
      content << line
    end
  end

  object = {
    'type' => 'Note',
    'attributedTo' => ACTOR,
    'inReplyTo' => params[:inReplyTo],
    'content' => "<p>\n#{content.join("\n<br>")}\n</p>",
    'attachment' => attachment,
    'tag' => tag,
    'to' => recipients
  }

  outbox 'Create', object, recipients, true
  redirect(params['anchor'] || '/inbox')
end

post '/share' do
  protected!
  selection(params).each { |f| FileUtils.mv f, f.sub(%r{/inbox/}, '/shared/') }
  outbox 'Announce', params['id'], public
  redirect(params['anchor'] || '/inbox')
end

post '/delete' do
  protected!
  collection = Kernel.const_get(params['dir'].upcase)
  if params['id']
    update_collection collection, params, true
  else
    update_collection collection, JSON.parse(File.read(collection))['orderedItems'], true
  end
  redirect(params['anchor'] || '/inbox')
end

post '/follow' do
  protected!
  actor, = parse_follow params['follow']
  outbox 'Follow', actor, [actor]
  redirect(params['anchor'] || '/inbox')
end

post '/unfollow' do
  protected!
  actor, mention = parse_follow params['follow']
  outbox 'Undo', JSON.parse(File.read(following_path)), [actor]
  p actor
  following_path = File.join(FOLLOWING_DIR, "#{mention}.json")
  if File.exist?(following_path)
    outbox 'Undo', JSON.parse(File.read(following_path)), [actor]
    FileUtils.rm_f following_path
    redirect(params['anchor'] || '/inbox')
  end
end

post '/login' do
  session['client'] = (OpenSSL::Digest::SHA256.base64digest(params['secret']) == File.read('.digest').chomp)
  redirect '/inbox'
end

get '/' do
  protected!
  redirect '/inbox'
end

['/inbox', '/shared', '/outbox'].each do |path|
  get path, provides: 'html' do
    protected!
    @dir = path.sub('/', '')
    # p(Kernel.const_get(@dir.upcase))
    # p(File.read(Kernel.const_get(@dir.upcase)))
    collection = JSON.parse(File.read(Kernel.const_get(@dir.upcase)))['orderedItems'].uniq
    # collection = ordered_collection(File.join(SOCIAL_DIR, path, 'note'))['orderedItems']
    @threads = []
    collection.each do |object|
      object['indent'] = 0
      object['replies'] = []
      if object['inReplyTo'].nil? || collection.select { |o| o['id'] == object['inReplyTo'] }.empty?
        @threads << object
      else
        collection.select { |o| o['id'] == object['inReplyTo'] }.each do |o|
          next unless o['indent']

          object['indent'] = o['indent'] + 2
          o['replies'] << object
          # else
          # p o
        end
      end
    end
    erb :collection
  end
end

helpers do
  def protected!
    halt 403 unless session['client']
  end

  def selection(params)
    selection = Dir[File.join(SOCIAL_DIR, params['dir'], '*', '*.json')]
    params['id'] ? selection.select { |f| JSON.parse(File.read(f))['id'] == params['id'] } : selection
  end

  def public
    recipients = ['https://www.w3.org/ns/activitystreams#Public']
    recipients += Dir[File.join(FOLLOWERS, '*.json')].collect { |f| JSON.parse(File.read(f))['actor'] }
    recipients.delete ACTOR
    recipients.uniq
  end

  def parse_follow(follow)
    case follow
    when /^#/
      actor = "https://relay.fedi.buzz/tag/#{follow.sub(/^#/, '')}"
      mention = follow
    when /^http/
      actor = follow
      mention = mention actor
    when /^@*\w+@\w+/
      mention = follow
      actor = actor(follow)
      return 502 unless actor
    end
    [actor, mention]
  end
end