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3 lines
3.2 KiB
3 lines
3.2 KiB
var MessageQueue=function(){"use strict";var t=function(t,s){return t(s={exports:{}},s.exports),s.exports}((function(t){t&&(t.exports=function(t){var s=this;this.array=t||[],this.over=!1,this.acceptInvalid=!1;var e={waiters:[],wait:function(){return new Promise(t=>e.waiters.push((function(){t()})))},signal:function(){e.waiters.length>0&&e.waiters.shift()()},flush:function(){for(;e.waiters.length>0;)e.waiters.shift()()}};this.take=async function(){if(!(s.over&&s.array.length<=0||(s.array.length<=0&&await e.wait(),s.over&&s.array.length<=0)))return s.array.shift()},this.poll=function(){return s.array},this.takeNB=function(){return s.array.length<=0?null:s.array.shift()},this.swallow0=async function(){for(var t,e=[];t=await s.take();)e.push(t);return e},this.swallow=function(t){return t?new Promise((function(e,o){var n=!0;s.swallow0().then((function(t){n&&e(t),n=!1})),t>0&&setTimeout(()=>{return s=new Error("swallow timeout reached ("+t+")"),n&&o(s),void(n=!1);var s},t)})):s.swallow0()},this.giveMany=function(t){for(let e of t)s.give(e)},this.give=function(t){(t||s.acceptInvalid)&&(s.array.push(t),e.signal())},this.commit=function(){return s.over=!0,e.flush(),s}})}));function s(){this.hooks=[]}s.prototype.hook=function(t){return this.hooks.push(t),this.hooks.length-1},s.prototype.unhook=function(t){this.hooks[t]=null},s.prototype.signal=function(t){for(const s of this.hooks)s&&s.apply(this,[t])},s.prototype.clear=function(){this.hooks=[]};const e=(t,s,e)=>(t.addEventListener(s,e),e);s.socket=(t,s)=>o(t);const o=o=>{const n=new s,i=new t;let r=!1;n.socket=o;const a=e(o,"message",t=>i.give(t.data)),c=e(o,"close",()=>i.commit());return(async()=>{let t;for(;void 0!==(t=await i.take());)n.signal({op:"message",value:t});n.signal({op:"close"})})(),n.close=t=>{r||(o.removeEventListener("message",a),o.removeEventListener("close",c),i.commit(),t&&o.close(),r=!0)},n.send=t=>{r||o.send(t)},n},n=t=>{const e=new s;let o=!1;e.socket=t.socket;const n=t.hook(t=>e.signal(t));e.close=s=>{o||(t.unhook(n),s&&t.close&&t.close(!0),o=!0)},e.send=s=>{o||t.socket.send(s)}};function i(e,r,a,c){this.socket=e instanceof s?n(e):e instanceof i?(t=>n(t.socket))(e):o(e),this.filter=r||(()=>!0),this.apply=a||(t=>t),this.map=c||(t=>t),this.premap=t=>t;const h=this.stage=new t,l=this;this.hook=this.socket.hook(t=>{if(t)switch(t.op){case"close":l.close();break;case"message":t=this.premap(t.value),this.filter(t)&&h.give(this.map(t))}})}i.JSON=(...t)=>{const s=new i(...t);return s.premap=t=>{try{return JSON.parse(t)}catch(t){return null}},s.apply=t=>JSON.stringify(s.apply(t)),s};const r=i.prototype;return r.clone=function(t,s,e){const o=new i(this.socket.socket,t||this.filter,s||this.apply,e||this.map);return o.premap=this.premap,o.on_close=this.on_close,o},r.close=function(t){this.on_close&&(this.on_close(this,t),this.on_close=null),this.socket.unhook(this.hook),this.stage.commit(),this.socket.close(t)},r.send=async function(t){for(;;){const s=this.stage.take();this.socket.send(this.apply(t));const e=await s;return e}},r.send0=function(t){this.socket.send(this.apply(t))},r.read=async function(){for(;;){const t=await this.stage.take();return t}},r.oneshot=async function(t){const s=await this.send(t);return this.close(),s},i}();
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