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import { Doc } from "../../fields/Doc";
import { DocServer } from "../DocServer";
import { MainView } from "../views/MainView";
import * as qs from 'query-string';
import { Utils, OmitKeys } from "../../Utils";
export namespace HistoryUtil {
export interface DocInitializerList {
[key: string]: string | number;
}
export interface DocUrl {
type: "doc";
docId: string;
initializers?: {
[docId: string]: DocInitializerList;
};
safe?: boolean;
readonly?: boolean;
nro?: boolean;
sharing?: boolean;
}
export type ParsedUrl = DocUrl;
// const handlers: ((state: ParsedUrl | null) => void)[] = [];
function onHistory(e: PopStateEvent) {
if (window.location.pathname !== "/home") {
const url = e.state as ParsedUrl || parseUrl(window.location);
if (url) {
switch (url.type) {
case "doc":
onDocUrl(url);
break;
}
}
}
// for (const handler of handlers) {
// handler(e.state);
// }
}
let _lastStatePush = 0;
export function pushState(state: ParsedUrl) {
if (Date.now() - _lastStatePush > 1000) {
history.pushState(state, "", createUrl(state));
}
_lastStatePush = Date.now();
}
export function replaceState(state: ParsedUrl) {
history.replaceState(state, "", createUrl(state));
}
function copyState(state: ParsedUrl): ParsedUrl {
return JSON.parse(JSON.stringify(state));
}
export function getState(): ParsedUrl {
const state = copyState(history.state);
state.initializers = state.initializers || {};
return state;
}
// export function addHandler(handler: (state: ParsedUrl | null) => void) {
// handlers.push(handler);
// }
// export function removeHandler(handler: (state: ParsedUrl | null) => void) {
// const index = handlers.indexOf(handler);
// if (index !== -1) {
// handlers.splice(index, 1);
// }
// }
const parsers: { [type: string]: (pathname: string[], opts: qs.ParsedQuery) => ParsedUrl | undefined } = {};
const stringifiers: { [type: string]: (state: ParsedUrl) => string } = {};
type ParserValue = true | "none" | "json" | ((value: string) => any);
type Parser = {
[key: string]: ParserValue
};
function addParser(type: string, requiredFields: Parser, optionalFields: Parser, customParser?: (pathname: string[], opts: qs.ParsedQuery, current: ParsedUrl) => ParsedUrl | null | undefined) {
function parse(parser: ParserValue, value: string | string[] | null | undefined) {
if (value === undefined || value === null) {
return value;
}
if (Array.isArray(value)) {
} else if (parser === true || parser === "json") {
value = JSON.parse(value);
} else if (parser === "none") {
} else {
value = parser(value);
}
return value;
}
parsers[type] = (pathname, opts) => {
const current: any = { type };
for (const required in requiredFields) {
if (!(required in opts)) {
return undefined;
}
const parser = requiredFields[required];
let value = opts[required];
value = parse(parser, value);
if (value !== null && value !== undefined) {
current[required] = value;
}
}
for (const opt in optionalFields) {
if (!(opt in opts)) {
continue;
}
const parser = optionalFields[opt];
let value = opts[opt];
value = parse(parser, value);
if (value !== undefined) {
current[opt] = value;
}
}
if (customParser) {
const val = customParser(pathname, opts, current);
if (val === null) {
return undefined;
} else if (val === undefined) {
return current;
} else {
return val;
}
}
return current;
};
}
function addStringifier(type: string, keys: string[], customStringifier?: (state: ParsedUrl, current: string) => string) {
stringifiers[type] = state => {
let path = Utils.prepend(`/${type}`);
if (customStringifier) {
path = customStringifier(state, path);
}
const queryObj = OmitKeys(state, keys).extract;
const query: any = {};
Object.keys(queryObj).forEach(key => query[key] = queryObj[key] === null ? null : JSON.stringify(queryObj[key]));
const queryString = qs.stringify(query);
return path + (queryString ? `?${queryString}` : "");
};
}
addParser("doc", {}, { readonly: true, initializers: true, nro: true, sharing: true }, (pathname, opts, current) => {
if (pathname.length !== 2) return undefined;
current.initializers = current.initializers || {};
const docId = pathname[1];
current.docId = docId;
});
addStringifier("doc", ["initializers", "readonly", "nro"], (state, current) => {
return `${current}/${state.docId}`;
});
export function parseUrl(location: Location | URL): ParsedUrl | undefined {
const pathname = location.pathname.substring(1);
const search = location.search;
const opts = search.length ? qs.parse(search, { sort: false }) : {};
const pathnameSplit = pathname.split("/");
const type = pathnameSplit[0];
if (type in parsers) {
return parsers[type](pathnameSplit, opts);
}
return undefined;
}
export function createUrl(params: ParsedUrl): string {
if (params.type in stringifiers) {
return stringifiers[params.type](params);
}
return "";
}
export async function initDoc(id: string, initializer: DocInitializerList) {
const doc = await DocServer.GetRefField(id);
if (!(doc instanceof Doc)) {
return;
}
Doc.assign(doc, initializer);
}
async function onDocUrl(url: DocUrl) {
const field = await DocServer.GetRefField(url.docId);
const init = url.initializers;
if (init) {
await Promise.all(Object.keys(init).map(id => initDoc(id, init[id])));
}
if (field instanceof Doc) {
MainView.Instance.openWorkspace(field, true);
}
}
window.onpopstate = onHistory;
}
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