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/* eslint-disable no-unused-vars */
import { callHook } from '../init/lifecycle';
import { getParentPath, stringifyQuery } from '../router/util';
import { noop } from '../util/core';
import { getAndActive } from '../event/sidebar';
import { get } from './ajax';
function loadNested(path, qs, file, next, vm, first) {
path = first ? path : path.replace(/\/$/, '');
path = getParentPath(path);
if (!path) {
return;
}
get(
vm.router.getFile(path + file) + qs,
false,
vm.config.requestHeaders
).then(next, _ => loadNested(path, qs, file, next, vm));
}
// Borrowed from https://j11y.io/snippets/getting-a-fully-qualified-url.
function qualifyURL(url) {
const img = document.createElement('img');
img.src = url; // set string url
url = img.src; // get qualified url
img.src = ''; // prevent the server request
return url;
}
export function isExternal(url) {
url = qualifyURL(url);
url = new URL(url);
return url.origin !== location.origin;
}
export function fetchMixin(proto) {
let last;
const abort = () => last && last.abort && last.abort();
const request = (url, hasbar, requestHeaders) => {
abort();
last = get(url, true, requestHeaders);
return last;
};
const get404Path = (path, config) => {
const { notFoundPage, ext } = config;
const defaultPath = '_404' + (ext || '.md');
let key;
let path404;
switch (typeof notFoundPage) {
case 'boolean':
path404 = defaultPath;
break;
case 'string':
path404 = notFoundPage;
break;
case 'object':
key = Object.keys(notFoundPage)
.sort((a, b) => b.length - a.length)
.find(key => path.match(new RegExp('^' + key)));
path404 = (key && notFoundPage[key]) || defaultPath;
break;
default:
break;
}
return path404;
};
proto._loadSideAndNav = function(path, qs, loadSidebar, cb) {
return () => {
if (!loadSidebar) {
return cb();
}
const fn = result => {
this._renderSidebar(result);
cb();
};
// Load sidebar
loadNested(path, qs, loadSidebar, fn, this, true);
};
};
proto._fetch = function(cb = noop) {
const { path, query } = this.route;
const qs = stringifyQuery(query, ['id']);
const { loadNavbar, requestHeaders, loadSidebar } = this.config;
// Abort last request
const file = this.router.getFile(path);
const req = request(file + qs, true, requestHeaders);
this.isRemoteUrl = isExternal(file);
// Current page is html
this.isHTML = /\.html$/g.test(file);
// Load main content
req.then(
(text, opt) =>
this._renderMain(
text,
opt,
this._loadSideAndNav(path, qs, loadSidebar, cb)
),
_ => {
this._fetchFallbackPage(file, qs, cb) || this._fetch404(file, qs, cb);
}
);
// Load nav
loadNavbar &&
loadNested(
path,
qs,
loadNavbar,
text => this._renderNav(text),
this,
true
);
};
proto._fetchCover = function() {
const { coverpage, requestHeaders } = this.config;
const query = this.route.query;
const root = getParentPath(this.route.path);
if (coverpage) {
let path = null;
const routePath = this.route.path;
if (typeof coverpage === 'string') {
if (routePath === '/') {
path = coverpage;
}
} else if (Array.isArray(coverpage)) {
path = coverpage.indexOf(routePath) > -1 && '_coverpage';
} else {
const cover = coverpage[routePath];
path = cover === true ? '_coverpage' : cover;
}
const coverOnly = Boolean(path) && this.config.onlyCover;
if (path) {
path = this.router.getFile(root + path);
this.coverIsHTML = /\.html$/g.test(path);
get(
path + stringifyQuery(query, ['id']),
false,
requestHeaders
).then(text => this._renderCover(text, coverOnly));
} else {
this._renderCover(null, coverOnly);
}
return coverOnly;
}
};
proto.$fetch = function(
cb = noop,
$resetEvents = this.$resetEvents.bind(this)
) {
const done = () => {
callHook(this, 'doneEach');
cb();
};
const onlyCover = this._fetchCover();
if (onlyCover) {
done();
} else {
this._fetch(() => {
$resetEvents();
done();
});
}
};
proto._fetchFallbackPage = function(path, qs, cb = noop) {
const { requestHeaders, fallbackLanguages, loadSidebar } = this.config;
if (!fallbackLanguages) {
return false;
}
const local = path.split('/')[1];
if (fallbackLanguages.indexOf(local) === -1) {
return false;
}
const newPath = path.replace(new RegExp(`^/${local}`), '');
const req = request(newPath + qs, true, requestHeaders);
req.then(
(text, opt) =>
this._renderMain(
text,
opt,
this._loadSideAndNav(path, qs, loadSidebar, cb)
),
() => this._fetch404(path, qs, cb)
);
return true;
};
/**
* Load the 404 page
* @param {String} path URL to be loaded
* @param {*} qs TODO: define
* @param {Function} cb Callback
* @returns {Boolean} True if the requested page is not found
* @private
*/
proto._fetch404 = function(path, qs, cb = noop) {
const { loadSidebar, requestHeaders, notFoundPage } = this.config;
const fnLoadSideAndNav = this._loadSideAndNav(path, qs, loadSidebar, cb);
if (notFoundPage) {
const path404 = get404Path(path, this.config);
request(this.router.getFile(path404), true, requestHeaders).then(
(text, opt) => this._renderMain(text, opt, fnLoadSideAndNav),
() => this._renderMain(null, {}, fnLoadSideAndNav)
);
return true;
}
this._renderMain(null, {}, fnLoadSideAndNav);
return false;
};
}
export function initFetch(vm) {
const { loadSidebar } = vm.config;
// Server-Side Rendering
if (vm.rendered) {
const activeEl = getAndActive(vm.router, '.sidebar-nav', true, true);
if (loadSidebar && activeEl) {
activeEl.parentNode.innerHTML += window.__SUB_SIDEBAR__;
}
vm._bindEventOnRendered(activeEl);
vm.$resetEvents();
callHook(vm, 'doneEach');
callHook(vm, 'ready');
} else {
vm.$fetch(_ => callHook(vm, 'ready'));
}
}