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<template>
<div role="feed" aria-label="TMW news" :aria-busy="count > 1 && !fullyLoaded" class="news" v-if="count">
<span v-if="!entries.length">(no news entries)</span>
<article tabindex="0" class="entry" v-for="(entry, index) in entries" :aria-posinset="index + 1" :aria-setsize="entries.length" :id="entry.id" :aria-labelledby="entry.id + '-title'" :aria-describedby="`${entry.id}-body ${entry.id}-date ${entry.id}-author`" :key="entry.id">
<header><a tabindex="-1" :id="entry.id + '-title'" :href="'#' + entry.id">{{ entry.title }}</a></header>
<time :id="entry.id + '-date'" aria-label="publication date" :datetime="entry.date" class="date">{{ entry.date }}</time>
<section :id="entry.id + '-body'" class="body" v-html="entry.html"></section>
<q :id="entry.id + '-author'" aria-label="author">{{entry.author}}</q>
</article>
<article v-if="count > 1 && !fullyLoaded" class="entry loading">
<section class="body">
Loading... Please wait.
</section>
</article>
</div>
</template>
<style scoped>
.news .entry {
margin-bottom: 0;
padding-bottom: 1em;
hyphens: auto;
&:not(:last-of-type) {
padding-bottom: 3em;
}
&:nth-of-type(1n + 2) {
padding-top: 1em;
border-top: solid 0.4ex rgba(0, 0, 0, 0.1);
}
&:first-child:not(:only-child) {
padding-top: 1em;
border-top: solid 0.4ex transparent;
}
&:nth-of-type(1n + 2), &:not(:only-child) {
&:hover, &:target, &:focus-within {
border-color: #0000FF;
background-color: rgba(220,220,220,0.5);
& > .date, & header > a {
color: #0000FF;
}
}
}
& header {
display: inline-block;
position: relative;
&> a {
text-decoration: none;
color: inherit;
font-weight: bold;
&:hover::before {
content: "⚓";
filter: grayscale(1) brightness(0);
position: absolute;
top: 0;
left: -1.6em;
}
}
}
& > .date {
float: right;
}
& .body {
margin-top: 2ex;
&:deep(b) {
display: block;
margin-bottom: 1ex;
}
& :any-link {
color: inherit;
text-decoration: none;
&::before {
content: "➜ ";
color: blue;
}
&:hover {
text-decoration: underline;
}
}
}
& q {
color: #136E18;
margin-top: 2ex;
display: inline-block;
&::before {
content: "– ";
}
}
}
@media (min-width: 1100px) {
.news .entry {
padding-left: 30px;
padding-right: 40px;
}
}
</style>
<script lang="ts">
import { Options, Vue } from "vue-class-component";
import newsEntries from "@/assets/news.json";
interface NewsEntry {
id: string;
title: string;
date: string;
author: string;
html: string;
}
@Options({
props: {
count: Number,
from: Number,
}
})
export default class News extends Vue {
private count = Infinity;
private from = 0;
private entries: NewsEntry[] = (newsEntries as NewsEntry[]).slice(this.from, this.count);
private fullyLoaded = false;
beautify (): void {
this.entries.forEach(entry => {
// FIXME: weird Vue bug
entry.html = entry.html.replace(/<br\/>/g,"<br></br>");
// compare the entry title with its first line:
const compare = `<b>${entry.title}</b><br></br>`;
if (entry.html.startsWith(compare)) {
// duplicate title: remove the extra one
entry.html = entry.html.slice(compare.length);
}
});
}
mounted (): void {
if (!process.env.VUE_APP_NEWS_JSON || !process.env.VUE_APP_NEWS_JSON.startsWith("https")) {
this.beautify();
// no extra news to load so end here
return;
}
// restore from cache while we're loading a fresh copy
if (Reflect.has(self, "localStorage")) {
const newsCache = localStorage.getItem("newsCache");
if (newsCache !== null) {
this.entries = (JSON.parse(newsCache) as NewsEntry[]).slice(this.from, this.count);
}
}
// initial rendering
this.beautify();
if (this.count === 1 && this.entries.length >= 1) {
// don't loaad extra news unprompted
return;
}
const req = new Request(process.env.VUE_APP_NEWS_JSON, {
method: "GET",
cache: "default", // serve if fresh, else fetch
});
fetch(req)
.then(data => data.json())
.then(data => {
this.entries = (data as NewsEntry[]).slice(this.from, this.count);
this.fullyLoaded = true;
this.beautify();
if (document.location.hash) {
let el = null;
if ((el = document.getElementById(document.location.hash.slice(1))) !== null) {
el.scrollIntoView(true);
}
}
if (Reflect.has(self, "localStorage")) {
localStorage.setItem("newsCache", JSON.stringify(data));
}
})
.catch(() => {
// no news (will use cache, if any)
})
}
}
</script>
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