246 lines
9.1 KiB
TypeScript
246 lines
9.1 KiB
TypeScript
import React from "react";
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type Meta = {title:string, description:string, keywords:string, image:string, canonical:string }
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type MetaKeys = keyof Meta;
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export const Meta:Meta = {
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title:"",
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description:"",
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keywords:"",
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image:"",
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canonical:""
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};
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type MetasInputs = { [Property in MetaKeys]?: string };
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export const Metas =(props:{concatListed?:boolean; dropUnlisted?:boolean}&MetasInputs):null=>
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{
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const additive = props.concatListed ? (key:MetaKeys, value:string)=> Meta[key] += value : (key:MetaKeys, value:string)=> Meta[key] = value;
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const subtractive = props.dropUnlisted ? (key:MetaKeys)=> Meta[key] = "" : (key:MetaKeys)=> {};
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Object.keys(Meta).forEach((key)=>{
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const metaKey = key as MetaKeys;
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const propValue = props[metaKey]||"";
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propValue ? additive(metaKey, propValue) : subtractive(metaKey);
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})
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if(window.innerWidth)
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{
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document.title = Meta.title;
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}
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return null;
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}
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export type Children = string | number | React.JSX.Element | React.JSX.Element[];
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type RoutePath = Array<string>;
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type RouteParams = Record<string, string|number|boolean>;
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type RouteState = {URL:URL, Path:RoutePath, Params:RouteParams, Anchor:string};
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type RouteContext = [Route:RouteState, Update:(inPath?:RoutePath, inParams?:RouteParams, inAnchor?:string)=>void];
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type RouteProps = {children:Children, url?:URL };
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export const Router = {
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Parse(url:URL):RouteState
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{
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const Path = url.pathname.substring(1, url.pathname.endsWith("/") ? url.pathname.length-1 : url.pathname.length).split("/");
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const Params:RouteParams = {};
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new URLSearchParams(url.search).forEach((k, v)=> Params[k] = v);
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const Anchor = url.hash.substring(1);
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return {URL:url, Path, Params, Anchor} as RouteState;
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},
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Context:React.createContext([{URL:new URL("https://original.route/"), Path:[], Params:{}, Anchor:""}, ()=>{}] as RouteContext),
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Provider(props:RouteProps)
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{
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const [routeGet, routeSet] = React.useState(Router.Parse(props.url || new URL(document.location.href)));
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const [dirtyGet, dirtySet] = React.useState(true);
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const routeUpdate:RouteContext[1] =(inPath, inParams, inAnchor)=>
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{
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const clone = new URL(routeGet.URL);
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inPath && (clone.pathname = inPath.join("/"));
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inParams && (clone.search = new URLSearchParams(inParams as Record<string, string>).toString());
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routeSet({
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URL:clone,
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Path: inPath || routeGet.Path,
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Params: inParams || routeGet.Params,
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Anchor: inAnchor || routeGet.Anchor
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});
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};
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// when the state changes, update the page url
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React.useEffect(()=> dirtyGet ? dirtySet(false) : history.pushState({...routeGet, URL:undefined}, "", routeGet.URL), [routeGet.URL.href]);
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React.useEffect(()=>{
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history.replaceState({...routeGet, URL:undefined}, "", routeGet.URL);
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window.addEventListener("popstate", ({state})=>
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{
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dirtySet(true);
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routeUpdate(state.Path, state.Params, state.Anchor);
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});
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document.addEventListener("click", e=>
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{
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const t = e.target as HTMLAnchorElement;
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if(t.href)
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{
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const u = new URL(t.href);
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if(u.origin == document.location.origin)
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{
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e.preventDefault();
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const parts = Router.Parse(u);
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routeUpdate(parts.Path, parts.Params, parts.Anchor);
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}
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}
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})
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}, []);
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return <Router.Context.Provider value={[routeGet, routeUpdate]}>{props.children}</Router.Context.Provider>;
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},
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Consumer()
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{
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return React.useContext(Router.Context);
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}
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};
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type SwitchContext = {depth:number, keys:Record<string, string>};
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export const SwitchContext = React.createContext({depth:0, keys:{}} as SwitchContext);
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export const Switch =({children}:{children:Children})=>
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{
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let fallback = null;
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if(Array.isArray(children))
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{
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const contextSelection = React.useContext(SwitchContext);
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const [contextRoute] = Router.Consumer();
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const routeSegment = contextRoute.Path.slice(contextSelection.depth);
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const checkChild =(inChild:{props:{value?:string}})=>
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{
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if(inChild?.props?.value)
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{
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const parts = inChild.props.value.split("/");
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if(parts.length > routeSegment.length)
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{
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return false;
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}
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const output:SwitchContext = {depth:contextSelection.depth+parts.length, keys:{}};
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for(let i=0; i<parts.length; i++)
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{
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const partRoute = routeSegment[i];
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const partCase = parts[i];
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if(partCase[0] == ":")
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{
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output.keys[partCase.substring(1)] = partRoute;
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}
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else if(partCase != "*" && partCase != partRoute)
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{
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return false;
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}
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}
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return output;
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}
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return false;
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}
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for(let i=0; i<children.length; i++)
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{
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const childCase = children[i];
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const childCaseChildren = childCase.props?.__args?.[2] || childCase.props.children;
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const newContextValue = checkChild(childCase);
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if(newContextValue)
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{
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return <SwitchContext.Provider value={newContextValue}>{childCaseChildren}</SwitchContext.Provider>
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}
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if(childCase?.props?.default && !fallback)
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{
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console.log(routeSegment);
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fallback = childCaseChildren;
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}
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}
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}
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return fallback;
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};
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export const Case =({children, value}:{children:Children, value?:string, default?:true})=>null;
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export const useRouteVars =()=> React.useContext(SwitchContext).keys;
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export type FetchRecord = {URL:string, CacheFor:number, CachedAt:number, CacheOnServer:boolean, Promise?:Promise<FetchRecord>, DelaySSR:boolean, Seed:boolean, Error?:string, JSON?:object};
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export const Fetch = {
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Cache:new Map() as Map<string, FetchRecord>,
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ServerBlocking:false as false|Promise<FetchRecord>[],
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ServerTouched:false as false|Set<FetchRecord>,
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ServerRemove:false as false|Set<FetchRecord>,
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Seed(seed:FetchRecord[])
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{
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seed.forEach(r=>{
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r.Promise = Promise.resolve(r);
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Fetch.Cache.set(r.URL, r)
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});
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},
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Request(URL:string, Init?:RequestInit, CacheFor:number = 60, CacheOnServer:boolean = true, DelaySSR:boolean = true, Seed:boolean = true)
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{
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let check = Fetch.Cache.get(URL);
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const load =(inCheck:FetchRecord)=>
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{
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Fetch.Cache.set(URL, inCheck);
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inCheck.CachedAt = 0;
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inCheck.Promise = fetch(URL, Init).then(resp=>resp.json()).then((json)=>{
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inCheck.JSON = json;
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inCheck.CachedAt = new Date().getTime();
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console.log(`...cached!`);
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return inCheck;
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});
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return inCheck;
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}
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if(!check)
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{
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console.log(`making new cache record...`);
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return load({URL, CacheFor, CachedAt:0, CacheOnServer, DelaySSR, Seed});
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}
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else if(check.CachedAt == 0)
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{
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console.log(`currently being cached...`);
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return check;
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}
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else
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{
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console.log(`found in cache...`);
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let secondsAge = (new Date().getTime() - check.CachedAt)/1000;
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if(secondsAge > check.CacheFor)
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{
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console.log(`...outdated...`);
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return load(check);
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}
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else
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{
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console.log(`...retrieved!`);
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return check;
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}
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}
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},
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Use(URL:string, Init?:RequestInit, CacheFor:number = 60, CacheOnServer:boolean = true, DelaySSR:boolean = true, Seed:boolean = true)
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{
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type FetchHookState = [Data:undefined|object, Updating:boolean];
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const [cacheGet, cacheSet] = React.useState([undefined, true] as FetchHookState);
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if(Fetch.ServerBlocking && Fetch.ServerTouched && DelaySSR)
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{
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const receipt = Fetch.Request(URL, Init, CacheFor, CacheOnServer, DelaySSR, Seed);
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if(receipt.CachedAt === 0 && receipt.Promise)// request for something that hasnt been cached yet
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{
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Fetch.ServerBlocking.push(receipt.Promise);
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}
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else if(receipt.Seed)
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{
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Fetch.ServerTouched.add(receipt);
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}
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return [receipt.JSON, receipt.CachedAt === 0];
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}
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React.useEffect(()=>
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{
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const receipt = Fetch.Request(URL, Init, CacheFor, CacheOnServer, DelaySSR);
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receipt.Promise?.then(()=>cacheSet([receipt.JSON, receipt.CachedAt === 0]));
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}
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, []);
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return cacheGet;
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}
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}; |