User:Evad37/TimestampDiffs.js

Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.

/***************************************************************************************************
 TimestampDiffs --- by Evad37
 > Links timestamps to diffs on discussion pages
***************************************************************************************************/
/* jshint laxbreak: true, undef: true, maxerr: 999*/
/* globals console, document, $, mw */
// <nowiki>
$.when(
	mw.loader.using(["mediawiki.api"]),
	$.ready
).then(function() {
	var config = {
		version: "1.0.0",
		mw: mw.config.get([
			"wgNamespaceNumber",
			"wgPageName",
			"wgRevisionId"
		]),
		months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
	};
	// Only activate on talk page and project pages
	var isTalkPage = config.mw.wgNamespaceNumber > 0 && config.mw.wgNamespaceNumber%2 === 1;
	var isProjectPage = config.mw.wgNamespaceNumber === 4;
	if ( !isTalkPage && !isProjectPage ) {
		return;
	}

	mw.util.addCSS(".tsdiffs-timestamp a { color:inherit; text-decoration: underline dotted #6495ED; }" );

	$(".mw-parser-output").html(
		$(".mw-parser-output").html().replace(/(\d{2}:\d{2}, \d{1,2} \w+ \d{4} \(UTC\))/g, "<span class='tsdiffs-timestamp tsdiffs-unlinked'>$1</span>")
	);
	 // Firing hook allows scripts or gadgets like Navpops to update themselves if needed
	mw.hook( 'wikipage.content' ).fire( $(".mw-parser-output") );

	var api = new mw.Api( {
		ajax: {
			headers: { 
				"Api-User-Agent": "TimestampDiffs/" + config.version + 
					" ( https://en.wikipedia.org/wiki/User:Evad37/TimestampDiffs.js )"
			}
		}
	} );

	var apiQueryCount = 0;
	var processTimestamps = function(rvStartId) {
		apiQueryCount++;
		return api.get({
			"action": "query",
			"format": "json",
			"prop": "revisions",
			"titles": config.mw.wgPageName,
			"formatversion": "2",
			"rvprop": "timestamp|user|comment|ids",
			"rvslots": "",
			"rvlimit": "5000",
			"rvStartId": rvStartId || config.mw.wgRevisionId
		}).then(function(response) {
			if (!response || !response.query || !response.query.pages || !response.query.pages[0] || !response.query.pages[0].revisions) {
				return $.Deferred().reject("API response did not contain any revisions");
			}
			var pageRevisions = response.query.pages[0].revisions.map(function(revision) {
				var date = new Date(revision.timestamp);
				var hours = ("0"+date.getUTCHours()).slice(-2);
				var minutes =  ("0"+date.getUTCMinutes()).slice(-2);
				var day = date.getUTCDate();
				var month = config.months[date.getUTCMonth()];
				var year = date.getUTCFullYear();
				revision.timestampText = hours + ":" + minutes + ", " + day + " " + month + " " + year + " (UTC)";
				return revision;
			});

			$(".tsdiffs-timestamp.tsdiffs-unlinked").each(function() {
				var timestamp = this.textContent;
				var revisions = pageRevisions.filter(function(revision) {
					return revision.timestampText === timestamp;
				});
				if (revisions.length) {
					var newerRevId = revisions[0].revid;
					var olderRevId = revisions[revisions.length-1].parentid || "prev";
					var comment = revisions.length === 1 ? revisions[0].comment : revisions.length + " edits";
					$(this).empty().removeClass("tsdiffs-unlinked").append(
						$("<a>").attr({
							"href": "/wiki/Special:Diff/" + olderRevId + "/" + newerRevId,
							"title": "Diff (" + comment + ")"
						}).text(timestamp)
					);
				}
			});

			if ( apiQueryCount < 5 && $(".tsdiffs-unlinked").length ) {
				return processTimestamps(pageRevisions[pageRevisions.length-1].revid);
			}
		});
	};
	return processTimestamps()
	.catch(function(code, error) {
		mw.notify("Error: " + (code || "unknown"), {title:"TimestampDiffs failed to load"});
		console.warn("[TimestampDiffs] Error: " + (code || "unknown"), error);
	});
});
// </nowiki>