Class: SelfSDK::Chat::FileObject

Inherits:
Object
  • Object
show all
Defined in:
lib/chat/file_object.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(token, url) ⇒ FileObject 



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# File 'lib/chat/file_object.rb', line 11

def initialize(token, url)
  @token = token
  @url = url
end

Instance Attribute Details

#ciphertext ⇒ Object

Returns the value of attribute ciphertext.



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# File 'lib/chat/file_object.rb', line 9

def ciphertext
  @ciphertext
end

#content ⇒ Object

Returns the value of attribute content.



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# File 'lib/chat/file_object.rb', line 9

def content
  @content
end

#key ⇒ Object

Returns the value of attribute key.



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# File 'lib/chat/file_object.rb', line 9

def key
  @key
end

#link ⇒ Object

Returns the value of attribute link.



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# File 'lib/chat/file_object.rb', line 9

def link
  @link
end

#mime ⇒ Object

Returns the value of attribute mime.



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# File 'lib/chat/file_object.rb', line 9

def mime
  @mime
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/chat/file_object.rb', line 9

def name
  @name
end

#nonce ⇒ Object

Returns the value of attribute nonce.



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# File 'lib/chat/file_object.rb', line 9

def nonce
  @nonce
end

Instance Method Details

#build_from_data(name, data, mime, opts = {}) ⇒ Object 



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# File 'lib/chat/file_object.rb', line 16

def build_from_data(name, data, mime, opts = {})
  @key = SelfCrypto::Util.aead_xchacha20poly1305_ietf_keygen
  @nonce = SelfCrypto::Util.aead_xchacha20poly1305_ietf_nonce
  @content = data
  @name = name
  @mime = mime

  # encrypt the object
  @ciphertext = SelfCrypto::Util.aead_xchacha20poly1305_ietf_encrypt(@key, @nonce, @content)

  # Upload
  remote_object = upload(ciphertext)
  public_url = opts[:public_url] || @url
  @link = "#{public_url}/v1/objects/#{remote_object["id"]}"
  @expires = remote_object["expires"]

  self
end

#build_from_object(input) ⇒ Object

Incoming objects



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# File 'lib/chat/file_object.rb', line 36

def build_from_object(input)
  # Download from CDN
  ciphertext = ""
  5.times do
    begin
      ciphertext = URI.open(input[:link], "Authorization" => "Bearer #{@token}").read
      break
    rescue => e
      SelfSDK.logger.info "error fetching #{input[:link]} : #{e.message}"
      sleep 1
    end
  end

  if ciphertext.empty?
    SelfSDK.logger.warn "unable to process incoming object"
    return
  end

  @content = ciphertext
  @key = nil
  @nonce = nil
  if input.key?(:key) && !input[:key].empty?
    # Decrypt
    composed_key = extract_key(input[:key])
    @key =   composed_key[:key]
    @nonce = composed_key[:nonce]

    @content = SelfCrypto::Util.aead_xchacha20poly1305_ietf_decrypt(@key, @nonce, ciphertext)
  end

  @name =  input[:name]
  @link =  input[:link]
  @mime =  input[:mime]
  @expires = input[:expires]

  self
end

#save(path) ⇒ Object 



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# File 'lib/chat/file_object.rb', line 84

def save(path)
  File.open(path, 'wb') { |file| file.write(@content) }
end

#to_payload ⇒ Object 



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# File 'lib/chat/file_object.rb', line 74

def to_payload
  {
    name: @name,
    link: @link,
    key: build_key(@key, @nonce),
    mime: @mime,
    expires: @expires
  }
end