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map/special/wikipage/src/wikipage.js

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import { selectAll, select } from 'd3-selection';
/*
Uses the Mediawiki API to simply display the contents of a wiki page.
Makes use of the following API calls:
* https://www.mediawiki.org/wiki/API:Parsing_wikitext
*/
var main = select("#content"),
title = window.location.hash ? window.location.hash.substring(1) : "Bienvenue_à_lerg",
baseurl = "/mw/api.php?action=parse&format=json&formatversion=2title=",
url = baseurl;
async function get_json (url) {
var resp = await fetch(url);
return await resp.json();
}
function url_for_title (title) {
return "/w/"+encodeURI(title.replace(/ /g, "_"));
}
async function load () {
let count = 0,
debugloopcount = 0;
while (count < NUM_FILES) {
console.log("starting loop", debugloopcount, "count", count, "url", url);
let resp = await fetch(url),
data = await resp.json(),
allimages = data.query.allimages,
useimages = [];
// console.log("got data", data.query.allimages.length);
// For each image:
// Use API:Imageinfo request/get the URL to a thumbnail image
//
for (var i=0, l=allimages.length; i<l; i++) {
let image = allimages[i];
// console.log("image", image.name);
let iu_data = await get_json(`/mw/api.php?action=query&list=imageusage&iutitle=${image.title}&iunamespace=0&format=json&formatversion=2`);
image.imageusage = iu_data.query.imageusage;
if (image.imageusage.length == 0) {
continue;
}
let ii_data = await get_json(`/mw/api.php?action=query&prop=imageinfo&titles=${image.title}&iiprop=url|size&dimensions|mime&iiurlwidth=320&format=json&formatversion=2`);
image.imageinfo = ii_data.query.pages[0].imageinfo[0];
if (!image.imageinfo.thumburl) {
continue;
}
useimages.push(image);
// console.log("imageusage", image.name, image.imageusage.length);
// console.log("imageinfo", image.name, image.imageinfo);
}
// console.log("allimages", allimages);
// allimages = allimages.filter(d=>d.imageinfo.thumburl && (d.imageusage.length > 0));
let items = main.selectAll("div.file")
.data(useimages, d=>d.title)
.enter()
.append("div")
.attr("class", "file")
.append("a")
.attr("href", d=>url_for_title(d.imageusage[d.imageusage.length-1].title))
.attr("target", "wikiframe")
.append("img")
.attr('src', d=>d.imageinfo.thumburl);
if (data.continue) {
url = baseurl+"&aicontinue="+data.continue.aicontinue;
}
count += useimages.length;
debugloopcount += 1;
// if (debugloopcount >= 5) break;
}
}
document.addEventListener("DOMContentLoaded", load);
document.querySelector("a#more").addEventListener("click", function (e) {
e.preventDefault();
load();
});