40 lines
1.7 KiB
JavaScript
40 lines
1.7 KiB
JavaScript
//---------------------------------------------------------------------------
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// @syndicate-lang/syntax-test, a demo of Syndicate extensions to JS.
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// Copyright (C) 2016-2018 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//---------------------------------------------------------------------------
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const { genUuid } = require("@syndicate-lang/core");
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const S = activate require("@syndicate-lang/driver-streams-node");
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message type Speak(who, what);
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assertion type Present(who);
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spawn named 'chatserver' {
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on asserted S.Stream($id, S.Incoming(S.TcpListener(5999))) {
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const me = genUuid('user');
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spawn named ['connectedUser', me] {
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stop on retracted S.Stream(id, S.Duplex());
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assert Present(me);
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on asserted Present($who) send S.Stream(id, S.Push(`${who} arrived.\n`, false));
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on retracted Present($who) send S.Stream(id, S.Push(`${who} departed.\n`, false));
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on message S.Stream(id, S.Line($line)) send Speak(me, line.fromUtf8());
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on message Speak($who, $what) send S.Stream(id, S.Push(`${who}: ${what}\n`, false));
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}
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}
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}
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