Module: OBF::External

Defined in:
lib/obf/external.rb

Defined Under Namespace

Classes: StructureError

Class Method Summary collapse

Class Method Details

.from_obf(obf_json_or_path, opts) ⇒ Object 



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# File 'lib/obf/external.rb', line 175

def self.from_obf(obf_json_or_path, opts)
  obj = obf_json_or_path
  if obj.is_a?(String)
    obj = OBF::Utils.parse_obf(File.read(obf_json_or_path))
  else
    obj = OBF::Utils.parse_obf(obf_json_or_path)
  end
  
  ['images', 'sounds'].each do |type|
    (obj[type] || []).each do |item|
      if !item['data'] && item['path'] && opts['zipper']
        content_type = item['content_type']
        data = opts['zipper'].read(item['path'])
        str = "data:" + content_type
        str += ";base64," + Base64.strict_encode64(data)
        item['data'] = str
      end
      if item['path']
        opts[type] ||= {} 
        opts[type][item['path']] ||= item
      end
    end
  end
  
  obj['license'] = OBF::Utils.parse_license(obj['license'])
  obj
end

.from_obz(obz_path, opts) ⇒ Object 



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# File 'lib/obf/external.rb', line 249

def self.from_obz(obz_path, opts)
  boards = []
  images = []
  sounds = []
  OBF::Utils.load_zip(obz_path) do |zipper|
    obf_opts = {'zipper' => zipper, 'images' => {}, 'sounds' => {}, 'boards' => {}}
    manifest = JSON.parse(zipper.read('manifest.json'))
    root = manifest['root']
    board = OBF::Utils.parse_obf(zipper.read(root))
    board['path'] = root
    unvisited_boards = [board]
    visited_boards = []
    while unvisited_boards.length > 0
      board_object = unvisited_boards.shift
      board_object['id'] ||= rand(9999).to_s + Time.now.to_i.to_s
      visited_boards << board_object

      board_object['buttons'].each do |button|
        if button['load_board']
          all_boards = visited_boards + unvisited_boards
          if all_boards.none?{|b| b['id'] == button['load_board']['id'] || b['path'] == button['load_board']['path'] }
            path = button['load_board']['path'] || manifest[button['load_board']['id']]
            if path
              b = OBF::Utils.parse_obf(zipper.read(path))
              b['path'] = path
              button['load_board']['id'] = b['id']
              unvisited_boards << b
            end
          end
        end
      end
    end
    visited_boards.each do |board_object|
      res = from_obf(board_object, obf_opts)
      images += res['images'] || []
      sounds += res['sounds'] || []
      boards << res
    end
  end
  images.uniq!
  sounds.uniq!
  raise "image ids must be present and unique" unless images.map{|i| i['id'] }.uniq.length == images.length
  raise "sound ids must be present and unique" unless sounds.map{|i| i['id'] }.uniq.length == sounds.length
  # TODO: try to fix the problem where multiple images or sounds have the same id --
  # this involves reaching in and updating image and sound references on generated boards..
  return {
    'boards' => boards,
    'images' => images,
    'sounds' => sounds
  }
end

.to_obf(hash, dest_path, path_hash = nil) ⇒ Object 



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# File 'lib/obf/external.rb', line 2

def self.to_obf(hash, dest_path, path_hash=nil)
  if hash['boards']
    old_hash = hash
    hash = old_hash['boards'][0]
    hash['images'] = old_hash['images'] || []
    hash['sounds'] = old_hash['sounds'] || []
    path_hash = nil
  end
  
  res = OBF::Utils.obf_shell
  res['id'] = hash['id']
  res['locale'] = hash['locale'] || 'en'
  res['format'] = OBF::OBF::FORMAT
  res['name'] = hash['name']
  res['default_layout'] = hash['default_layout'] || 'landscape'
  res['url'] = hash['url']
  res['data_url'] = hash['data_url']
  res['description_html'] = hash['description_html']
  res['license'] = OBF::Utils.parse_license(hash['license'])
  hash.each do |key, val|
    if key && key.match(/^ext_/)
      res[key] = val
    end
  end
  grid = []
  
  images = []
  sounds = []
  
  res['buttons'] = []
  buttons = hash['buttons'] #board.settings['buttons']
  button_count = buttons.length
  
  buttons.each_with_index do |original_button, idx|
    button = {
      'id' => original_button['id'],
      'label' => original_button['label'],
      'vocalization' => original_button['vocalization'],
      'action' => original_button['action'],
      'left' => original_button['left'],
      'top' => original_button['top'],
      'width' => original_button['width'],
      'height' => original_button['height'],
      'border_color' => OBF::Utils.fix_color(original_button['border_color'] || "#aaa", 'rgb'),
      'background_color' => OBF::Utils.fix_color(original_button['background_color'] || "#fff", 'rgb')
    }
    if original_button['load_board']
      button['load_board'] = {
        'id' => original_button['load_board']['id'],
        'url' => original_button['load_board']['url'],
        'data_url' => original_button['load_board']['data_url']
      }
      if path_hash && path_hash['included_boards'] && path_hash['included_boards'][original_button['load_board']['id']]
        button['load_board']['path'] = "board_#{original_button['load_board']['id']}.obf"
      end
    end
    if original_button['hidden']
      button['hidden'] = original_button['hidden']
    end
    if original_button['url']
      button['url'] = original_button['url']
    end
    original_button.each do|key, val|
      if key.match(/^ext_/)
        button[key] = val
      end
    end

    if original_button['image_id'] && hash['images']
      image = hash['images'].detect{|i| i['id'] == original_button['image_id']}
      if image
        images << image
        button['image_id'] = image['id']
      end
    end
    if original_button['sound_id']
      sound = hash['sounds'].detect{|s| s['id'] == original_button['sound_id']}
      if sound
        sounds << sound
        button['sound_id'] = sound['id']
      end
    end
    res['buttons'] << trim_empties(button)
    OBF::Utils.update_current_progress(idx.to_f / button_count.to_f)
  end

  images.each do |original_image|
    image = {
      'id' => original_image['id'],
      'width' => original_image['width'],
      'height' => original_image['height'],
      'license' => OBF::Utils.parse_license(original_image['license']),
      'url' => original_image['url'],
      'data' => original_image['data'],
      'data_url' => original_image['data_url'],
      'content_type' => original_image['content_type']
    }
    if !path_hash
      image['data'] ||= OBF::Utils.image_base64(image['url']) if image['url']
    else
      if path_hash['images'] && path_hash['images'][image['id']]
        image['path'] = path_hash['images'][image['id']]['path']
      else
        image_fetch = OBF::Utils.image_raw(image['url'] || image['data'])
        if image_fetch
          zip_path = "images/image_#{image['id']}#{image_fetch['extension']}"
          path_hash['images'] ||= {}
          path_hash['images'][image['id']] = {
            'path' => zip_path
          }
          path_hash['zip'].add(zip_path, image_fetch['data'])
          image['path'] = zip_path
        end
      end
    end
    res['images'] << trim_empties(image)
  end
  
  sounds.each do |original_sound|
    sound = {
      'id' => original_sound['id'],
      'duration' => original_sound['duration'],
      'license' => OBF::Utils.parse_license(original_sound['license']),
      'url' => original_sound['url'],
      'data' => original_sound['data'],
      'data_url' => original_sound['data_url'],
      'content_type' => original_sound['content_type']
    }
    if !path_hash
      sound['data'] = OBF::Utils.sound_base64(sound['url']) if sound['url']
    else
      if path_hash['sounds'] && path_hash['sounds'][sound['id']]
        sound['path'] = path_hash['sounds'][sound['id']]['path']
      else
        sound_fetch = OBF::Utils.sound_raw(sound['url'] || sound['data'])
        if sound_fetch
          zip_path = "sounds/sound_#{sound['id']}#{sound_fetch['extension']}"
          path_hash['sounds'] ||= {}
          path_hash['sounds'][sound['id']] = {
            'path' => zip_path
          }
          path_hash['zip'].add(zip_path, sound_fetch['data'])
          sound['path'] = zip_path
        end
      end
      sound['path'] = zip_path
    end
    
    res['sounds'] << trim_empties(sound)
  end

  res['grid'] = OBF::Utils.parse_grid(hash['grid']) # TODO: more robust parsing here
  if path_hash
    zip_path = "board_#{res['id']}.obf"
    path_hash['boards'] ||= {}
    path_hash['boards'][res['id']] = {
      'path' => zip_path
    }
    path_hash['zip'].add(zip_path, JSON.pretty_generate(res))
  else
    File.open(dest_path, 'w') {|f| f.write(JSON.pretty_generate(res)) }
  end
  return dest_path
end

.to_obz(content, dest_path, opts) ⇒ Object 



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# File 'lib/obf/external.rb', line 203

def self.to_obz(content, dest_path, opts)
  if content['id']
    old_content = content
    content = {
      'boards' => [old_content],
      'images' => old_content['images'] || [],
      'sounds' => old_content['sounds'] || []
    }
  end
  
  paths = {}
  boards = content['boards']
  content['images'] ||= boards.map{|b| b['images'] }.flatten.uniq
  content['sounds'] ||= boards.map{|b| b['sounds'] }.flatten.uniq
  root_board = boards[0]
  OBF::Utils.build_zip(dest_path) do |zipper|
    paths['zip'] = zipper
    paths['included_boards'] = {}
    boards.each do |b|
      paths['included_boards'][b['id']] = b
    end
    boards.each do |b|
      b = paths['included_boards'][b['id']]
      if b
        b['images'] = content['images'] || []
        b['sounds'] = content['sounds'] || []
        to_obf(b, nil, paths)
      end
    end
    manifest = {
      'format' => OBF::OBF::FORMAT,
      'root' => paths['boards'][root_board['id']]['path'],
      'paths' => {}
    }
    ['images', 'sounds', 'boards'].each do |type|
      manifest['paths'][type] = {}
      (paths[type] || {}).each do |id, opts|
        manifest['paths'][type][id] = opts['path']
      end
    end
    
    zipper.add('manifest.json', JSON.pretty_generate(manifest))
  end
  return dest_path
end

.to_pdf(board, dest_path, opts) ⇒ Object 



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# File 'lib/obf/external.rb', line 301

def self.to_pdf(board, dest_path, opts)
  if board && board['boards']
    opts['packet'] = true
  end
  tmp_path = OBF::Utils.temp_path("stash")
  if opts['packet']
    OBF::Utils.as_progress_percent(0, 0.3) do
      OBF::External.to_obz(board, tmp_path, opts)  
    end
    OBF::Utils.as_progress_percent(0.3, 1.0) do
      OBF::OBZ.to_pdf(tmp_path, dest_path)
    end
  else
    OBF::Utils.as_progress_percent(0, 0.5) do
      self.to_obf(board, tmp_path)  
    end
    OBF::Utils.as_progress_percent(0.5, 1.0) do
      OBF::OBF.to_pdf(tmp_path, dest_path)
    end
  end
  File.unlink(tmp_path) if File.exist?(tmp_path)
  dest_path
end

.to_png(board, dest_path, opts) ⇒ Object 



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# File 'lib/obf/external.rb', line 325

def self.to_png(board, dest_path, opts)
  tmp_path = OBF::Utils.temp_path("stash")
  OBF::Utils.as_progress_percent(0, 0.5) do
    self.to_pdf(board, tmp_path, opts)
  end
  OBF::Utils.as_progress_percent(0.5, 1.0) do
    OBF::PDF.to_png(tmp_path, dest_path)
  end
  File.unlink(tmp_path) if File.exist?(tmp_path)
  dest_path
end

.trim_empties(hash) ⇒ Object 



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# File 'lib/obf/external.rb', line 167

def self.trim_empties(hash)
  new_hash = {}
  hash.each do |key, val|
    new_hash[key] = val if val != nil
  end
  new_hash
end