@discoveryjs/discovery
Version:
Frontend framework for rapid data (JSON) analysis, shareable serverless reports and dashboards
2 lines (1 loc) • 27.2 kB
JavaScript
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t=t||{},F(U(async()=>{let r=await fetch(e,t.fetch),s=fe(r,t);if(s&&r.body)return{method:"fetch",stream:r.body,resource:t.resource||s,options:t};let a=r.headers.get("content-type")||"",n=await r.text();if(a.toLowerCase().startsWith("application/json"))try{let i=JSON.parse(n);n=i.error||i}catch{}throw n=new Error(n),n.isFetchError=!0,n.status=r.status,n.statusText=r.statusText,n.stack=null,n}),{title:`Load data from url: ${e}`})}function Lt(e){let t,r=new ReadableStream({start(i){t=i},cancel(){t=null}}),s,a=null,n=new Promise(i=>{s=l=>i({method:"push",stream:r,resource:l?a=l:e?.resource,options:e})});return e=e||{},F(U(()=>n),{start(i){s(i)},push(i){s(),t?.enqueue(i)},finish(i){t?.close(),t=null,i!==void 0&&isFinite(i)&&a!==null&&(a.encodedSize=Number(i)),a=null}})}function he({dataset:e,state:t},r){return new Promise((s,a)=>t.subscribeSync(async(n,i)=>{if(n.stage==="error"){i(),a(n.error);return}let{stage:l,progress:c,step:o}=n;await r.setState({stage:l,progress:c},o),l==="received"&&(i(),s(e))}))}function fe(e,t){if(e instanceof Response){let r=t?.isResponseOk||yt,s=t?.getContentSize||St,a=t?.getContentEncodedSize||bt,n=t?.getContentCreatedAt||wt;if(r(e))return{type:"url",name:e.url,size:Number(s(e))||null,encodedSize:Number(a(e)),createdAt:n(e)}}if(e instanceof File)return{type:"file",name:e.name,size:e.size,createdAt:e.lastModified};if(e instanceof Blob)return{size:e.size};if(ArrayBuffer.isView(e))return{size:e.byteLength};if(typeof e=="string")return{size:e.length}}var ye={inited:{value:0,duration:0,title:"Init"},request:{value:0,duration:.1,title:"Awaiting data"},receiving:{value:.1,duration:.8,title:"Receiving data"},decoding:{value:.9,duration:.015,title:"Decoding data"},received:{value:.915,duration:.01,title:"Await app ready"},prepare:{value:.925,duration:.055,title:"Processing data (prepare)"},initui:{value:.98,duration:.02,title:"Rendering UI"},done:{value:1,duration:0,title:"Done!"},error:{value:1,duration:0,title:"Error"}},Pt=e=>e|0,pe=e=>typeof e=="function"?e:()=>{},ge=e=>new Promise(t=>setTimeout(t,e)),Ot=async()=>{if(!document.hidden)return Promise.race([new Promise(requestAnimationFrame).then(()=>ge(0)),ge(12)])};function me(e,t,r){let{value:s,title:a,duration:n}=ye[e],i=0,l=null;if(t){let{done:c,elapsed:o,units:u,completed:d,total:h}=t;h?(i=c?1:d/h,l=u==="bytes"?Math.round(i*100)+"%":`${d}/${h}`):(i=c?1:.1+Math.min(.9,o/2e4),l=u==="bytes"?(d/(1024*1024)).toFixed(1)+"MB":String(d))}return{stageTitle:a,progressValue:s+i*n,progressText:l,stepText:r||"",title:l?`${a} (${l})${r?":":"..."}`:e!=="done"?`${a}${r?":":"..."}`:a}}var z=class extends T{startTime;lastStageStartTime;awaitRepaintPenaltyTime;finished;awaitRepaint;timings;onTiming;onFinish;appearanceDelay;domReady;el;#e;#t;constructor({onTiming:t,onFinish:r,domReady:s}){super({stage:"inited",progress:null,error:null}),this.startTime=null,this.lastStageStartTime=null,this.awaitRepaintPenaltyTime=0,this.finished=!1,this.awaitRepaint=null,this.timings=[],this.onTiming=pe(t),this.onFinish=pe(r),this.domReady=s||Promise.resolve(),this.el=x("div","view-progress skip-fast-track",[x("div","content main-secondary",[this.#e=x("span","main"),this.#t=x("span","secondary")]),x("div","progress")])}recordTiming(t,r,s=performance.now()){let a={stage:t,title:ye[t].title,duration:Pt(s-r)};this.lastStageStartTime=s,this.timings.push(a),this.onTiming(a)}async#r(t=!1,r=performance.now()){let s=r-(this.awaitRepaint||0),a=r-(this.lastStageStartTime||0);if(t||s>65&&a>200){let n=performance.now();await Ot(),this.awaitRepaintPenaltyTime+=performance.now()-n,this.awaitRepaint=performance.now()}}async setState(t,r){let s=this.value.stage,{stage:a=s,progress:n=null,error:i=null}=t;if(this.finished)return;if(i){this.set("stage"in t?{stage:a,progress:n,error:i}:{...this.value,error:i}),this.finish(i);return}this.set({stage:a,progress:n,error:i});let l=a!==s,c=performance.now();s==="inited"&&(this.startTime=c),l&&(this.lastStageStartTime!==null&&this.recordTiming(s,this.lastStageStartTime,c),this.lastStageStartTime=c,this.awaitRepaint=c);let{title:o,stepText:u,progressValue:d}=me(a,n,r);this.el.style.setProperty("--progress",String(d)),this.#e.textContent=o,this.#t.textContent=u,this.el.offsetWidth,await this.#r(l,c)}async setStateStep(t){let{title:r,stepText:s}=me(this.value.stage,this.value.progress,t);this.#e.textContent=r,this.#t.textContent=s,this.el.offsetWidth,await this.#r(!0)}finish(t){this.finished||(this.finished=!0,this.lastStageStartTime!==null&&this.recordTiming(this.value.stage,this.lastStageStartTime),this.recordTiming(t?"error":"done",this.startTime||this.lastStageStartTime||performance.now()),this.set({stage:"done",progress:null,error:t||null}),this.onFinish(Object.assign([...this.timings],{awaitRepaintPenaltyTime:Math.round(this.awaitRepaintPenaltyTime)})),this.el.classList.add("done"),this.el.classList.toggle("error",!!t))}dispose(){this.finish(),this.el.remove()}};function Rt(e){return new z({domReady:e,onTiming:({title:t,duration:r})=>console.log(`[Discovery/preloader] ${t} \u2013 ${r}ms`)})}function jt(e){if(e&&!O(V,e))throw new Error(`dataSource "${e}" is not supported`)}function Mt(e,t,r){let{darkmode:s,darkmodePersistent:a,colorScheme:n=s,colorSchemePersistent:i=a}=r,l=R(n,i);G(t,l)&&e.setAttribute("darkmode","")}Nt.colorScheme=!0;function Nt(e){e=e||{};let t=e.container||document.body,r=document.createElement("div"),s=r.attachShadow({mode:"open"}),a=e.dataSource;jt(a),Mt(r,t,e);let n=e.data,i=n?a==="push"?V.push(e.loadDataOptions):V[a||"url"](e.data,e.loadDataOptions):{dataset:Promise.resolve(),state:void 0};if(n&&a==="push"){let{start:u,push:d,finish:h}=i;globalThis.discoveryLoader={start:u,push:d,finish(...m){delete globalThis.discoveryLoader,h(...m)}}}let l=Y(s,e.styles),c=e.progressbar||Rt(l),o=e.embed?It(i.state):()=>{};return i.state&&he(i,c).catch(()=>{}),s.append(c.el),t.append(r),Object.assign(i.dataset,{el:r,shadowRoot:s,progressbar:c,disposeEmbed:o})}function It(e){let t=W(),r=window.parent,s=[],a=(c,o)=>{let u={from:"discoveryjs-app",id:t,type:c,payload:o};r.postMessage(u,"*")},n=()=>a("destroy",null),i=c=>{let{id:o,type:u}=c.data||{};if(o===t)switch(u){case"defineAction":case"setPageHash":case"setRouterPreventLocationUpdate":{s.push(c.data);break}default:console.error(`[Discovery/preloader] Unknown preload message type "${u}"`)}};if(r===window)return;addEventListener("message",i,!1),addEventListener("unload",n,!1),a("preinit",{page:{hash:location.hash||"#"}});let l=e?e.subscribeSync(c=>{let{stage:o}=c;return(o==="error"||o==="received")&&l(),a("loadingState",c)}):()=>{};return()=>(removeEventListener("message",i,!1),removeEventListener("unload",n,!1),l(),n(),{hostId:t,postponeMessages:s})}export{Nt as preloader};