101 lines
3.4 KiB
JavaScript
101 lines
3.4 KiB
JavaScript
"use strict";
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const Http = activate require("@syndicate-lang/driver-http-node");
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const S = activate require("@syndicate-lang/driver-streams-node");
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import {
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Set, Bytes,
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Encoder, Observe,
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Dataspace, Skeleton, currentFacet, genUuid, RandomID
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} from "@syndicate-lang/core";
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const P = activate require("./internal_protocol");
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const W = activate require("./protocol");
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export function websocketServerFacet(reqId) {
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assert P.POA(reqId);
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on message Http.DataIn(reqId, $data) {
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if (data instanceof Bytes) send P.FromPOA(reqId, W.makeDecoder(data).next());
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}
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on message P.ToPOA(reqId, $resp) send Http.DataOut(reqId, new Encoder().push(resp).contents());
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stop on message P.Disconnect(reqId);
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stop on retracted P.POAScope(reqId, _);
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}
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export function streamServerFacet(id) {
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assert P.POA(id);
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const decoder = W.makeDecoder(null);
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on message S.Data(id, $data) {
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decoder.write(data);
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let v;
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while ((v = decoder.try_next())) send P.FromPOA(id, v);
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}
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on message P.ToPOA(id, $resp) send S.Push(id, new Encoder().push(resp).contents(), null);
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stop on message P.Disconnect(id);
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stop on retracted P.POAScope(id, _);
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}
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export function streamServerActor(id, debugLabel) {
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spawn named [debugLabel || 'stream-poa', id] {
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stop on retracted S.Duplex(id);
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streamServerFacet(id);
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}
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}
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spawn named '@syndicate-lang/server/server/POAHandler' {
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during P.Proposal($scope, $assertion) assert P.Envelope(scope, assertion);
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on message P.Proposal($scope, $assertion) send P.Envelope(scope, assertion);
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during Observe(P.Envelope($scope, $spec)) assert P.Proposal(scope, Observe(spec));
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during P.POA($connId) spawn named P.POA(connId) {
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field this.scope = null;
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assert P.POAScope(connId, this.scope) when (this.scope !== null);
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assert P.ServerActive(this.scope) when (this.scope !== null);
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let endpoints = Set();
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on message P.FromPOA(connId, W.Connect($scope)) {
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// TODO: Enforce requirement that Connect appear exactly once, before anything else
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this.scope = scope;
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}
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on message P.FromPOA(connId, W.Assert($ep, $a)) {
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if (!endpoints.includes(ep)) {
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endpoints = endpoints.add(ep);
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react {
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on stop { endpoints = endpoints.remove(ep); }
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field this.assertion = a;
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assert P.Proposal(this.scope, this.assertion);
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currentFacet().addEndpoint(() => {
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if (Observe.isClassOf(this.assertion)) {
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const spec = P.Envelope(this.scope, this.assertion.get(0));
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const analysis = Skeleton.analyzeAssertion(spec);
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analysis.callback = Dataspace.wrap((evt, vs) => {
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currentFacet().actor.scheduleScript(() => {
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switch (evt) {
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case Skeleton.EVENT_ADDED: send P.ToPOA(connId, W.Add(ep, vs)); break;
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case Skeleton.EVENT_REMOVED: send P.ToPOA(connId, W.Del(ep, vs)); break;
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case Skeleton.EVENT_MESSAGE: send P.ToPOA(connId, W.Msg(ep, vs)); break;
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}
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});
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});
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return [Observe(spec), analysis];
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} else {
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return [void 0, null];
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}
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}, true);
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on message P.FromPOA(connId, W.Assert(ep, $newAssertion)) this.assertion = newAssertion;
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stop on message P.FromPOA(connId, W.Clear(ep));
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}
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}
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}
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on message P.FromPOA(connId, W.Message($body)) {
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send P.Proposal(this.scope, body);
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}
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}
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}
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