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updates for initial libp2p integration
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61 changes: 61 additions & 0 deletions
61
app/src/main/java/org/witness/proofmode/share/p2p/ChatController.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package org.witness.proofmode.org.witness.proofmode.share.p2p | ||
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| import io.libp2p.core.PeerId | ||
| import io.libp2p.core.Stream | ||
| import io.libp2p.core.multistream.ProtocolId | ||
| import io.libp2p.core.multistream.StrictProtocolBinding | ||
| import io.libp2p.etc.types.toByteBuf | ||
| import io.libp2p.protocol.ProtocolHandler | ||
| import io.libp2p.protocol.ProtocolMessageHandler | ||
| import io.netty.buffer.ByteBuf | ||
| import java.nio.charset.Charset | ||
| import java.util.concurrent.CompletableFuture | ||
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| interface ChatController { | ||
| fun send(message: String) | ||
| } | ||
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| typealias OnChatMessage = (PeerId, String) -> Unit | ||
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| class Chat(chatCallback: OnChatMessage) : ChatBinding(ChatProtocol(chatCallback)) | ||
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| const val protocolId: ProtocolId = "/example/chat/0.1.0" | ||
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| open class ChatBinding(echo: ChatProtocol) : StrictProtocolBinding<ChatController>(protocolId, echo) | ||
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| open class ChatProtocol( | ||
| private val chatCallback: OnChatMessage | ||
| ) : ProtocolHandler<ChatController>(Long.MAX_VALUE, Long.MAX_VALUE) { | ||
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| override fun onStartInitiator(stream: Stream) = onStart(stream) | ||
| override fun onStartResponder(stream: Stream) = onStart(stream) | ||
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| private fun onStart(stream: Stream): CompletableFuture<ChatController> { | ||
| val ready = CompletableFuture<Void>() | ||
| val handler = Chatter(chatCallback, ready) | ||
| stream.pushHandler(handler) | ||
| return ready.thenApply { handler } | ||
| } | ||
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| open inner class Chatter( | ||
| private val chatCallback: OnChatMessage, | ||
| val ready: CompletableFuture<Void> | ||
| ) : ProtocolMessageHandler<ByteBuf>, ChatController { | ||
| lateinit var stream: Stream | ||
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| override fun onActivated(stream: Stream) { | ||
| this.stream = stream | ||
| ready.complete(null) | ||
| } | ||
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| override fun onMessage(stream: Stream, msg: ByteBuf) { | ||
| val msgStr = msg.toString(Charset.defaultCharset()) | ||
| chatCallback(stream.remotePeerId(), msgStr) | ||
| } | ||
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| override fun send(message: String) { | ||
| val data = message.toByteArray(Charset.defaultCharset()) | ||
| stream.writeAndFlush(data.toByteBuf()) | ||
| } | ||
| } | ||
| } |
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