Class: Aspera::Api::AoC

Inherits:
Rest
  • Object
show all
Defined in:
lib/aspera/api/aoc.rb

Constant Summary collapse

PRODUCT_NAME = 
'Aspera on Cloud'
DEFAULT_WORKSPACE = 
''
PROD_DOMAIN =

Production domain of AoC

'ibmaspera.com'
SCOPE_FILES_SELF =

various API scopes supported

'self'
SCOPE_FILES_USER = 
'user:all'
SCOPE_FILES_ADMIN = 
'admin:all'
SCOPE_FILES_ADMIN_USER = 
'admin-user:all'
SCOPE_FILES_ADMIN_USER_USER = 
"#{SCOPE_FILES_ADMIN_USER}+#{SCOPE_FILES_USER}"
FILES_APP = 
'files'
PACKAGES_APP = 
'packages'
API_V1 = 
'api/v1'
ID_AK_ADMIN = 
'ASPERA_ACCESS_KEY_ADMIN'

Constants inherited from Rest

Rest::ENTITY_NOT_FOUND, Rest::JSON_DECODE

Instance Attribute Summary collapse

Attributes inherited from Rest

#auth_params, #base_url

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Rest

array_params, array_params?, basic_token, build_uri, #call, #cancel, #create, decode_query, #delete, io_http_session, #lookup_by_name, #oauth, #oauth_token, #params, #read, remote_certificate_chain, set_parameters, start_http_session, #update, user_agent

Constructor Details

#initialize(subpath: API_V1, url:, auth:, client_id: nil, client_secret: nil, scope: nil, redirect_uri: nil, private_key: nil, passphrase: nil, username: nil, password: nil, workspace: nil, secret_finder: nil) ⇒ AoC

Returns a new instance of AoC.

Raises:

  • (ArgumentError) 


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# File 'lib/aspera/api/aoc.rb', line 135

def initialize(subpath: API_V1, url:, auth:, client_id: nil, client_secret: nil, scope: nil, redirect_uri: nil, private_key: nil, passphrase: nil, username: nil,
  password: nil, workspace: nil, secret_finder: nil)
  # test here because link may set url
  raise ArgumentError, 'Missing mandatory option: url' if url.nil?
  raise ArgumentError, 'Missing mandatory option: scope' if scope.nil?
  # default values for client id
  client_id, client_secret = self.class.get_client_info if client_id.nil?
  # access key secrets are provided out of band to get node api access
  # key: access key
  # value: associated secret
  @secret_finder = secret_finder
  @workspace_name = workspace
  @cache_user_info = nil
  @cache_url_token_info = nil
  @context_cache = nil
  auth_params = {
    type:          :oauth2,
    client_id:     client_id,
    client_secret: client_secret,
    scope:         scope
  }
  # analyze type of url
  url_info = AoC.link_info(url)
  Log.log.debug{Log.dump(:url_info, url_info)}
  @private_link = url_info[:private_link]
  auth_params[:grant_method] = if url_info.key?(:token)
    :url_json
  else
    raise ArgumentError, 'Missing mandatory option: auth' if auth.nil?
    auth
  end
  # this is the base API url
  api_url_base = self.class.api_base_url(api_domain: url_info[:instance_domain])
  # auth URL
  auth_params[:base_url] = "#{api_url_base}/#{OAUTH_API_SUBPATH}/#{url_info[:organization]}"

  # fill other auth parameters based on OAuth method
  case auth_params[:grant_method]
  when :web
    raise ArgumentError, 'Missing mandatory option: redirect_uri' if redirect_uri.nil?
    auth_params[:redirect_uri] = redirect_uri
  when :jwt
    raise ArgumentError, 'Missing mandatory option: private_key' if private_key.nil?
    raise ArgumentError, 'Missing mandatory option: username' if username.nil?
    auth_params[:private_key_obj] = OpenSSL::PKey::RSA.new(private_key, passphrase)
    auth_params[:payload] = {
      iss: auth_params[:client_id], # issuer
      sub: username, # subject
      aud: JWT_AUDIENCE
    }
    # add jwt payload for global client id
    auth_params[:payload][:org] = url_info[:organization] if GLOBAL_CLIENT_APPS.include?(auth_params[:client_id])
  when :url_json
    auth_params[:url] = {grant_type: 'url_token'} # URL arguments
    auth_params[:json] = {url_token: url_info[:token]} # JSON body
    # password protection of link
    auth_params[:json][:password] = password unless password.nil?
    # basic auth required for /token
    auth_params[:auth] = {type: :basic, username: auth_params[:client_id], password: auth_params[:client_secret]}
  else Aspera.error_unexpected_value(auth_params[:grant_method])
  end
  super(
    base_url: "#{api_url_base}/#{subpath}",
    auth: auth_params
    )
end

Instance Attribute Details

static methods



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# File 'lib/aspera/api/aoc.rb', line 133

def private_link
  @private_link
end

Class Method Details

.api_base_url(organization: 'api', api_domain: PROD_DOMAIN) ⇒ Object

base API url depends on domain, which could be “qa.xxx”



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# File 'lib/aspera/api/aoc.rb', line 66

def api_base_url(organization: 'api', api_domain: PROD_DOMAIN)
  return "https://#{organization}.#{api_domain}"
end

.get_client_info(client_name = nil) ⇒ Object

strings /Applications/Aspera\ Drive.app/Contents/MacOS/AsperaDrive|grep -E ‘.100==$’|base64 –decode



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# File 'lib/aspera/api/aoc.rb', line 60

def get_client_info(client_name=nil)
  client_key = client_name.nil? ? GLOBAL_CLIENT_APPS.first : client_name.to_sym
  return client_key, DataRepository.instance.item(client_key)
end

.link_info(url) ⇒ Hash

Returns information about public link, or nil if not a public link.

Parameters:

  • url (String) —

    URL of AoC public link

Returns:

  • (Hash) —

    information about public link, or nil if not a public link



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# File 'lib/aspera/api/aoc.rb', line 87

def link_info(url)
  final_uri = Rest.new(base_url: url, redirect_max: MAX_AOC_URL_REDIRECT).read('')[:http].uri
  raise 'AoC shall redirect to login page' if final_uri.query.nil?
  decoded_query = Rest.decode_query(final_uri.query)
  # is that a public link ?
  if decoded_query.key?('token')
    Log.log.warn{"Unknown pub link path: #{final_uri.path}"} unless PUBLIC_LINK_PATHS.include?(final_uri.path)
    # ok we get it !
    return {
      instance_domain: url_parts(final_uri)[1],
      url:             "https://#{final_uri.host}",
      token:           decoded_query['token']
    }
  end
  Log.log.debug{"path=#{final_uri.path} does not end with /login"} unless final_uri.path.end_with?('/login')
  if decoded_query['state']
    # can be a private link
    state_uri = URI.parse(decoded_query['state'])
    if state_uri.query && decoded_query['redirect_uri']
      decoded_state = Rest.decode_query(state_uri.query)
      if decoded_state.key?('short_link_url')
        if (m = state_uri.path.match(%r{/files/workspaces/([0-9]+)/all/([0-9]+):([0-9]+)}))
          redirect_uri = URI.parse(decoded_query['redirect_uri'])
          parts = url_parts(redirect_uri)
          return {
            instance_domain: parts[1],
            organization:    parts[0],
            url:             "https://#{redirect_uri.host}",
            private_link:    {
              workspace_id: m[1],
              node_id:      m[2],
              file_id:      m[3]
            }
          }
        end
      end
    end
  end
  parts = url_parts(URI.parse(url))
  return {
    instance_domain: parts[1],
    organization:    parts[0]
  }
end

.metering_api(entitlement_id, customer_id, api_domain = PROD_DOMAIN) ⇒ Object 



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# File 'lib/aspera/api/aoc.rb', line 70

def metering_api(entitlement_id, customer_id, api_domain=PROD_DOMAIN)
  return Rest.new(
    base_url: "#{api_base_url(api_domain: api_domain)}/metering/v1",
    headers:  {'X-Aspera-Entitlement-Authorization' => Rest.basic_token(entitlement_id, customer_id)}
  )
end

.url_parts(uri) ⇒ Object

split host of myorg.asperafiles.com in org and domain



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# File 'lib/aspera/api/aoc.rb', line 78

def url_parts(uri)
  raise "No host found in URL.Please check URL format: https://myorg.#{PROD_DOMAIN}" if uri.host.nil?
  parts = uri.host.split('.', 2)
  Aspera.assert(parts.length == 2){"expecting a public FQDN for #{PRODUCT_NAME}"}
  return parts
end

Instance Method Details

#add_ts_tags(transfer_spec:, app_info:) ⇒ Object

Add transfer spec callback in Node (transfer_spec_gen4)



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# File 'lib/aspera/api/aoc.rb', line 474

def add_ts_tags(transfer_spec:, app_info:)
  # translate transfer direction to upload/download
  transfer_type = Transfer::Spec.action(transfer_spec)
  # Analytics tags
  ################
  transfer_spec.deep_merge!({
    'tags' => {
      Transfer::Spec::TAG_RESERVED => {
        'usage_id' => "aspera.files.workspace.#{app_info[:workspace_id]}", # activity tracking
        'files'    => {
          'files_transfer_action' => "#{transfer_type}_#{app_info[:app].gsub(/s$/, '')}",
          'workspace_name'        => app_info[:workspace_name], # activity tracking
          'workspace_id'          => app_info[:workspace_id]
        }
      }
    }
  })
  # Console cookie
  ################
  # we are sure that fields are not nil
  cookie_elements = [app_info[:app], ['name'] || 'public link', ['email'] || 'none'].map{|e|Base64.strict_encode64(e)}
  cookie_elements.unshift(COOKIE_PREFIX_CONSOLE_AOC)
  transfer_spec['cookie'] = cookie_elements.join(':')
  # Application tags
  ##################
  case app_info[:app]
  when FILES_APP
    file_id = transfer_spec['tags'][Transfer::Spec::TAG_RESERVED]['node']['file_id']
    transfer_spec.deep_merge!({'tags' => {Transfer::Spec::TAG_RESERVED => {'files' => {'parentCwd' => "#{app_info[:node_info]['id']}:#{file_id}"}}}}) \
      unless transfer_spec.key?('remote_access_key')
  when PACKAGES_APP
    transfer_spec.deep_merge!({
      'tags' => {
        Transfer::Spec::TAG_RESERVED => {
          'files' => {
            'package_id'        => app_info[:package_id],
            'package_name'      => app_info[:package_name],
            'package_operation' => transfer_type
          }
        }
      }
    })
  end
  transfer_spec['tags'][Transfer::Spec::TAG_RESERVED]['files']['node_id'] = app_info[:node_info]['id']
  transfer_spec['tags'][Transfer::Spec::TAG_RESERVED]['app'] = app_info[:app]
end

#additional_persistence_ids ⇒ Object 



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# File 'lib/aspera/api/aoc.rb', line 214

def additional_persistence_ids
  return [['id']] if public_link.nil?
  return [] # TODO : public_link['id'] ?
end

#assert_public_link_types(expected) ⇒ Object 



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# File 'lib/aspera/api/aoc.rb', line 210

def assert_public_link_types(expected)
  Aspera.assert_values(public_link['purpose'], expected){'public link type'}
end

#context(application = nil) ⇒ Hash

Returns current context information: workspace, and home node/file if app is “Files”.

Parameters:

  • application (Symbol) (defaults to: nil) —

    :files or :packages

Returns:

  • (Hash) —

    current context information: workspace, and home node/file if app is “Files”



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# File 'lib/aspera/api/aoc.rb', line 237

def context(application = nil)
  return @context_cache unless @context_cache.nil?
  Aspera.assert(!application.nil?){'application must be set once'}
  Aspera.assert_values(application, %i[files packages])
  ws_id =
    if !public_link.nil?
      Log.log.debug('Using workspace of public link')
      public_link['data']['workspace_id']
    elsif !private_link.nil?
      Log.log.debug('Using workspace of private link')
      private_link[:workspace_id]
    elsif @workspace_name.eql?(DEFAULT_WORKSPACE)
      Log.log.debug('Using default workspace'.green)
      raise 'User does not have default workspace, please specify workspace' if ['default_workspace_id'].nil?
      ['default_workspace_id']
    elsif @workspace_name.nil?
      nil
    else
      lookup_by_name('workspaces', @workspace_name)['id']
    end
  ws_info =
    if ws_id.nil?
      nil
    else
      read("workspaces/#{ws_id}")[:data]
    end
  @context_cache = if ws_info.nil?
    {
      workspace_id:   nil,
      workspace_name: 'Shared folders'
    }
  else
    {
      workspace_id:   ws_info['id'],
      workspace_name: ws_info['name']
    }
  end
  return @context_cache unless application.eql?(:files)
  if !public_link.nil?
    assert_public_link_types(['view_shared_file'])
    @context_cache[:home_node_id] = public_link['data']['node_id']
    @context_cache[:home_file_id] = public_link['data']['file_id']
  elsif !private_link.nil?
    @context_cache[:home_node_id] = private_link[:node_id]
    @context_cache[:home_file_id] = private_link[:file_id]
  elsif ws_info
    @context_cache[:home_node_id] = ws_info['home_node_id']
    @context_cache[:home_file_id] = ws_info['home_file_id']
  else
    # not part of any workspace, but has some folder shared
     = (exception: true) rescue {'read_only_home_node_id' => nil, 'read_only_home_file_id' => nil}
    @context_cache[:home_node_id] = ['read_only_home_node_id']
    @context_cache[:home_file_id] = ['read_only_home_file_id']
  end
  raise "Cannot get user's home node id, check your default workspace or specify one" if @context_cache[:home_node_id].to_s.empty?
  Log.log.debug{Log.dump(:context, @context_cache)}
  return @context_cache
end

#create_package_simple(package_data, validate_meta, new_user_option) ⇒ Object

create a package

Parameters:

  • package_data (Hash) —

    package creation (with extensions…)

  • validate_meta (TrueClass, FalseClass) —

    true to validate parameters locally

  • new_user_option (Hash) —

    options if an unknown user is specified

Returns:

  • transfer spec, node api and package information



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# File 'lib/aspera/api/aoc.rb', line 441

def create_package_simple(package_data, validate_meta, new_user_option)
  update_package_metadata_for_api(package_data)
  # list of files to include in package, optional
  # package_data['file_names']||=[..list of filenames to transfer...]

  # lookup users
  resolve_package_recipients(package_data, package_data['workspace_id'], 'recipients', new_user_option)
  resolve_package_recipients(package_data, package_data['workspace_id'], 'bcc_recipients', new_user_option)

  validate_metadata(package_data) if validate_meta

  #  create a new package container
  created_package = create('packages', package_data)[:data]

  package_node_api = node_api_from(
    node_id: created_package['node_id'],
    workspace_id: created_package['workspace_id'],
    package_info: created_package)

  # tell AoC what to expect in package: 1 transfer (can also be done after transfer)
  # TODO: if multi session was used we should probably tell
  # also, currently no "multi-source" , i.e. only from client-side files, unless "node" agent is used
  update("packages/#{created_package['id']}", {'sent' => true, 'transfers_expected' => 1})[:data]

  return {
    spec: package_node_api.transfer_spec_gen4(created_package['contents_file_id'], Transfer::Spec::DIRECTION_SEND),
    node: package_node_api,
    info: created_package
  }
end

#current_user_info(exception: false) ⇒ Object

cached user information



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# File 'lib/aspera/api/aoc.rb', line 220

def (exception: false)
  return @cache_user_info unless @cache_user_info.nil?
  # get our user's default information
  @cache_user_info =
    begin
      read('self')[:data]
    rescue StandardError => e
      raise e if exception
      Log.log.debug{"ignoring error: #{e}"}
      {}
    end
  USER_INFO_FIELDS_MIN.each{|f|@cache_user_info[f] = nil if @cache_user_info[f].nil?}
  return @cache_user_info
end

#node_api_from(node_id:, workspace_id: nil, workspace_name: nil, scope: Node::SCOPE_USER, package_info: nil) ⇒ Object

Parameters:

  • node_id (String) —

    identifier of node in AoC

  • workspace_id (String) (defaults to: nil) —

    workspace identifier

  • workspace_name (String) (defaults to: nil) —

    workspace name

  • scope (defaults to: Node::SCOPE_USER) —

    e.g. Node::SCOPE_USER, or nil (requires secret)

  • package_info (Hash) (defaults to: nil) —

    created package information



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# File 'lib/aspera/api/aoc.rb', line 302

def node_api_from(node_id:, workspace_id: nil, workspace_name: nil, scope: Node::SCOPE_USER, package_info: nil)
  Aspera.assert_type(node_id, String)
  node_info = read("nodes/#{node_id}")[:data]
  if workspace_name.nil? && !workspace_id.nil?
    workspace_name = read("workspaces/#{workspace_id}")[:data]['name']
  end
  app_info = {
    api:            self, # for callback
    app:            package_info.nil? ? FILES_APP : PACKAGES_APP,
    node_info:      node_info,
    workspace_id:   workspace_id,
    workspace_name: workspace_name
  }
  if PACKAGES_APP.eql?(app_info[:app])
    raise 'package info required' if package_info.nil?
    app_info[:package_id] = package_info['id']
    app_info[:package_name] = package_info['name']
  end
  node_params = {base_url: node_info['url']}
  # if secret is available
  if scope.nil?
    node_params[:auth] = {
      type:     :basic,
      username: node_info['access_key'],
      password: @secret_finder&.lookup_secret(url: node_info['url'], username: node_info['access_key'], mandatory: true)
    }
  else
    # OAuth bearer token
    node_params[:auth] = auth_params.clone
    node_params[:auth][:scope] = Node.token_scope(node_info['access_key'], scope)
    # special header required for bearer token only
    node_params[:headers] = {Node::HEADER_X_ASPERA_ACCESS_KEY => node_info['access_key']}
  end
  node_params[:app_info] = app_info
  return Node.new(**node_params)
end

#permissions_send_event(created_data:, app_info:, types: PERMISSIONS_CREATED) ⇒ Object

Callback from Plugins::Node send shared folder event to AoC

Parameters:

  • created_data (Hash) —

    response from permission creation

  • app_info (Hash) —

    hash with app info

  • types (Array) (defaults to: PERMISSIONS_CREATED) —

    event types



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# File 'lib/aspera/api/aoc.rb', line 570

def permissions_send_event(created_data:, app_info:, types: PERMISSIONS_CREATED)
  Aspera.assert_type(types, Array)
  Aspera.assert(!types.empty?)
  event_creation = {
    'types'        => types,
    'node_id'      => app_info[:node_info]['id'],
    'workspace_id' => app_info[:workspace_id],
    'data'         => created_data
  }
  # (optional). The name of the folder to be displayed to the destination user.
  # Use it if its value is different from the "share_as" field.
  event_creation['link_name'] = app_info[:opt_link_name] unless app_info[:opt_link_name].nil?
  create('events', event_creation)
end

#permissions_set_create_params(create_param:, app_info:) ⇒ Object

Callback from Plugins::Node add application specific tags to permissions creation

Parameters:

  • create_param (Hash) —

    parameters for creating permissions

  • app_info (Hash) —

    application information



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# File 'lib/aspera/api/aoc.rb', line 526

def permissions_set_create_params(create_param:, app_info:)
  # workspace shared folder:
  # access_id = "#{ID_AK_ADMIN}_WS_#{app_info[:workspace_id]}"
  default_params = {
    # 'access_type'   => 'user', # mandatory: user or group
    # 'access_id'     => access_id, # id of user or group
    'tags' => {
      Transfer::Spec::TAG_RESERVED => {
        'files' => {
          'workspace' => {
            'id'                => app_info[:workspace_id],
            'workspace_name'    => app_info[:workspace_name],
            'user_name'         => ['name'],
            'shared_by_user_id' => ['id'],
            'shared_by_name'    => ['name'],
            'shared_by_email'   => ['email'],
            # 'shared_with_name'  => access_id,
            'access_key'        => app_info[:node_info]['access_key'],
            'node'              => app_info[:node_info]['name']
          }
        }
      }
    }
  }
  create_param.deep_merge!(default_params)
  if create_param.key?('with')
    contact_info = lookup_by_name(
      'contacts',
      create_param['with'],
      {'current_workspace_id' => app_info[:workspace_id], 'context' => 'share_folder'})
    create_param.delete('with')
    create_param['access_type'] = contact_info['source_type']
    create_param['access_id'] = contact_info['source_id']
    create_param['tags'][Transfer::Spec::TAG_RESERVED]['files']['workspace']['shared_with_name'] = contact_info['email']
  end
  # optional
  app_info[:opt_link_name] = create_param.delete('link_name')
end

#public_link ⇒ Object 



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# File 'lib/aspera/api/aoc.rb', line 202

def public_link
  return nil unless auth_params[:grant_method].eql?(:url_json)
  return @cache_url_token_info unless @cache_url_token_info.nil?
  # TODO: can there be several in list ?
  @cache_url_token_info = read('url_tokens')[:data].first
  return @cache_url_token_info
end

#resolve_package_recipients(package_data, ws_id, recipient_list_field, new_user_option) ⇒ Object

Normalize package creation recipient lists as expected by AoC API AoC expects {type: , id: }, but ascli allows providing either the native values or just a name in that case, the name is resolved and replaced with {type: , id: }

Parameters:

  • package_data —

    The whole package creation payload

  • recipient_list_field —

    The field in structure, i.e. recipients or bcc_recipients

Returns:

  • nil package_data is modified



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# File 'lib/aspera/api/aoc.rb', line 375

def resolve_package_recipients(package_data, ws_id, recipient_list_field, new_user_option)
  return unless package_data.key?(recipient_list_field)
  Aspera.assert_type(package_data[recipient_list_field], Array){recipient_list_field}
  new_user_option = {'package_contact' => true} if new_user_option.nil?
  Aspera.assert_type(new_user_option, Hash){'new_user_option'}
  # list with resolved elements
  resolved_list = []
  package_data[recipient_list_field].each do |short_recipient_info|
    case short_recipient_info
    when Hash # native API information, check keys
      Aspera.assert(short_recipient_info.keys.sort.eql?(%w[id type])){"#{recipient_list_field} element shall have fields: id and type"}
    when String # CLI helper: need to resolve provided name to type/id
      # email: user, else dropbox
      entity_type = short_recipient_info.include?('@') ? 'contacts' : 'dropboxes'
      begin
        full_recipient_info = lookup_by_name(entity_type, short_recipient_info, {'current_workspace_id' => ws_id})
      rescue RuntimeError => e
        raise e unless e.message.start_with?(ENTITY_NOT_FOUND)
        # dropboxes cannot be created on the fly
        raise "No such shared inbox in workspace #{ws_id}" if entity_type.eql?('dropboxes')
        # unknown user: create it as external user
        full_recipient_info = create('contacts', {
          'current_workspace_id' => ws_id,
          'email'                => short_recipient_info
        }.merge(new_user_option))[:data]
      end
      short_recipient_info = if entity_type.eql?('dropboxes')
        {'id' => full_recipient_info['id'], 'type' => 'dropbox'}
      else
        {'id' => full_recipient_info['source_id'], 'type' => full_recipient_info['source_type']}
      end
    else # unexpected extended value, must be String or Hash
      raise "#{recipient_list_field} item must be a String (email, shared inbox) or Hash (id,type)"
    end # type of recipient info
    # add original or resolved recipient info
    resolved_list.push(short_recipient_info)
  end
  # replace with resolved elements
  package_data[recipient_list_field] = resolved_list
  return nil
end

#update_package_metadata_for_api(pkg_data) ⇒ Object

CLI allows simplified format for metadata: transform if necessary for API



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# File 'lib/aspera/api/aoc.rb', line 418

def update_package_metadata_for_api(pkg_data)
  case pkg_data['metadata']
  when Array, NilClass # no action
  when Hash
    api_meta = []
    pkg_data['metadata'].each do |k, v|
      api_meta.push({
        # 'input_type' => 'single-dropdown',
        'name'   => k,
        'values' => v.is_a?(Array) ? v : [v]
      })
    end
    pkg_data['metadata'] = api_meta
  else Aspera.error_unexpected_value(pkg_meta.class)
  end
  return nil
end

#validate_metadata(pkg_data) ⇒ Object

Check metadata: remove when validation is done server side



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# File 'lib/aspera/api/aoc.rb', line 340

def validate_metadata(pkg_data)
  # validate only for shared inboxes
  return unless pkg_data['recipients'].is_a?(Array) &&
    pkg_data['recipients'].first.is_a?(Hash) &&
    pkg_data['recipients'].first.key?('type') &&
    pkg_data['recipients'].first['type'].eql?('dropbox')
  meta_schema = read("dropboxes/#{pkg_data['recipients'].first['id']}")[:data]['metadata_schema']
  if meta_schema.nil? || meta_schema.empty?
    Log.log.debug('no metadata in shared inbox')
    return
  end
  Aspera.assert(pkg_data.key?('metadata')){"package requires metadata: #{meta_schema}"}
  pkg_meta = pkg_data['metadata']
  Aspera.assert_type(pkg_meta, Array){'metadata'}
  Log.log.debug{Log.dump(:metadata, pkg_meta)}
  pkg_meta.each do |field|
    Aspera.assert_type(field, Hash){'metadata field'}
    Aspera.assert(field.key?('name')){'metadata field must have name'}
    Aspera.assert(field.key?('values')){'metadata field must have values'}
    Aspera.assert_type(field['values'], Array){'metadata field values'}
    Aspera.assert(!meta_schema.none?{|i|i['name'].eql?(field['name'])}){"unknown metadata field: #{field['name']}"}
  end
  meta_schema.each do |field|
    provided = pkg_meta.select{|i|i['name'].eql?(field['name'])}
    raise "only one field with name #{field['name']} allowed" if provided.count > 1
    raise "missing mandatory field: #{field['name']}" if field['required'] && provided.empty?
  end
end