User:Isaac (WMF)/citation count.js

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// Code largely borrowed from: https://en.wikipedia.org/wiki/User:TayIorRobinson/wikigender.js
// and https://en.wikipedia.org/wiki/User:SuperHamster/CiteUnseen.js

(async() => {

	const CITATION_API = "https://citation-linking.wmcloud.org/api/check-citations?";
	
	function processIcon(refNode, api_url, num_matches, pages) {
		let linkNode = document.createElement("a");
	    linkNode.href = api_url;
	    linkNode.id = 'cite-finder-' + refNode.id.substring(10);
	    linkNode.title = pages.join('\n');
	    if (num_matches == 1) {
		    linkNode.text = "Found in " + num_matches + " other article."
	    } else {
	    	linkNode.text = "Found in " + num_matches + " other articles."
	    }
	
	    let imgNode = document.createElement("img");
	    imgNode.alt = "Search icon";
	    imgNode.src = "https://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/OOjs_UI_indicator_search-ltr.svg/17px-OOjs_UI_indicator_search-ltr.svg.png";
	    imgNode.decoding = "async";
	    imgNode.height = 17;
	    imgNode.width = 17;
	    imgNode.paddingRight = 5;
	    
	    linkNode.prepend(imgNode);
		refNode.appendChild(linkNode);
	}

    async function fetchData(lang, pageid) {
    	// https://citation-linking.wmcloud.org/api/check-citations?lang=en&page_id=53418&max_pages=3
        let request_url = CITATION_API + "lang=" + lang + "&page_id=" + pageid + "&max_pages=3";
    	let response = await fetch(request_url);
        let data = await response.json();
        return data;
    }
    
    function addCitationStats(lang, pageid, results) {
    	let baseurl = CITATION_API + "lang=" + lang + "&page_id=" + pageid;
    	let refs = document.querySelectorAll('li[id^=cite_note]');
    	for (let i = 0; i < refs.length; i++) {
    		let citation_id = refs.item(i).id.substring(10);
    		let citation_url = baseurl + "&citation_id=" + citation_id;
    		for (let ref of results) {
    			if (ref['citation-id'] == citation_id) {
    				processIcon(refs.item(i), citation_url, ref['total-matches'], ref['matching-pages']);
    				break
    			}
    		}
    	}
    }
    
	// article but not Main Page
	if (mw.config.get('wgNamespaceNumber') == 0 && mw.config.get('wgWikibaseItemId') != 'Q5296') {
		let lang = mw.config.get("wgDBname").replace("wiki","");
		if (lang == "en") {
	    	let pageid = mw.config.get("wgArticleId");
	    	let mwIndicator = document.createElement("div");
		    mwIndicator.className = "mw-indicator";
		    mwIndicator.id = "mw-indicator-citationcount";
		    document.querySelector(".mw-indicators").appendChild(mwIndicator);
		
		    let link = document.createElement("a");
		    link.href = "javascript:void(0)";
		    link.onclick = async() => {
		        link.remove();
		        let data = await fetchData(lang, pageid);
		        addCitationStats(lang, pageid, data.results);
		    };
		    link.title = "Gather statistics on where else this page's sources appear on English Wikipedia";
		    mwIndicator.appendChild(link);
		
		    let img = document.createElement("img");
		    img.alt = "Search icon";
		    img.src = "https://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/OOjs_UI_indicator_search-ltr.svg/17px-OOjs_UI_indicator_search-ltr.svg.png";
		    img.decoding = "async";
		    img.height = 20;
		    img.width = 20;
		    link.appendChild(img);
		}
	}
})();