Module: KRPC::Encoder

Defined in:
lib/krpc/encoder.rb

Constant Summary collapse

RPC_HELLO_MESSAGE = 
"\x48\x45\x4C\x4C\x4F\x2D\x52\x50\x43\x00\x00\x00"
STREAM_HELLO_MESSAGE = 
"\x48\x45\x4C\x4C\x4F\x2D\x53\x54\x52\x45\x41\x4D"
NAME_LENGTH = 
32

Class Method Summary collapse

Class Method Details

.encode(obj, type) ⇒ Object

Given a type object, and ruby object, encode the ruby object



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# File 'lib/krpc/encoder.rb', line 13

def encode(obj, type)
  if type.is_a?(Types::MessageType) then type.ruby_type.encode(obj)
  elsif type.is_a?(Types::ValueType) then encode_value(obj, type)
  elsif type.is_a?(Types::EnumType)
    enum_value = type.ruby_type[obj]
    encode_value(enum_value, TypeStore["int32"])
  elsif type.is_a?(Types::ClassType)
    remote_oid = if obj == nil then 0 else obj.remote_oid end
    encode_value(remote_oid, TypeStore["uint64"])
  elsif type.is_a?(Types::ListType)
    ruby_type = TypeStore["KRPC.List"].ruby_type
    msg = ruby_type.new(
      items: obj.map{|x| encode(TypeStore.coerce_to(x, type.value_type), type.value_type)}.to_a
    )
    ruby_type.encode(msg)
  elsif type.is_a?(Types::DictionaryType)
    ruby_type = TypeStore["KRPC.Dictionary"].ruby_type
    entry_type = TypeStore["KRPC.DictionaryEntry"].ruby_type
    entries = obj.map do |k,v|
      entry_type.new(
        key: encode(TypeStore.coerce_to(k, type.key_type), type.key_type),
        value: encode(TypeStore.coerce_to(v, type.value_type), type.value_type)
      )
    end
    msg = ruby_type.new(entries: entries)
    ruby_type.encode(msg)
  elsif type.is_a?(Types::SetType)
    ruby_type = TypeStore["KRPC.Set"].ruby_type
    msg = ruby_type.new(
      items: obj.map{|x| encode( TypeStore.coerce_to(x, type.value_type), type.value_type )}.to_a
    )
    ruby_type.encode(msg)
  elsif type.is_a?(Types::TupleType)
    ruby_type = TypeStore["KRPC.Tuple"].ruby_type
    msg = ruby_type.new(
      items: obj.zip(type.value_types).map{|x,t| encode( TypeStore.coerce_to(x, t), t )}.to_a
    )
    ruby_type.encode(msg)
  else raise(RuntimeError, "Cannot encode object #{obj} of type #{type}")
  end
end

.encode_request(req) ⇒ Object 



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# File 'lib/krpc/encoder.rb', line 59

def encode_request(req)
  data = PB::Request.encode(req)
  length = ProtobufUtils::Encoder.encode_nonnegative_varint(data.length)
  length + data
end

.encode_value(value, type) ⇒ Object 



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# File 'lib/krpc/encoder.rb', line 55

def encode_value(value, type)
  ProtobufUtils::Encoder.encode(value, type.protobuf_type)
end

.hash_to_enumeration_values(hash) ⇒ Object 



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# File 'lib/krpc/encoder.rb', line 65

def hash_to_enumeration_values(hash)
  hash.map {|k,v| PB::EnumerationValue.new(name: k.to_s, value: v) }
end