User:Satricious/dateFixer.js

/* <nowiki>
DO NOT USE THIS. If you do, please review edits before submitting changes 

This script is only useful in a limited number of cases and is currently in
development and it's not clear whether it's useful at all. So I highly
recommend against using it

Author: Satricious
Description: Looks for {{use dmy/mdy dates}} and appropriately changes any
             incorrect dates to their corrected form

*/

if (mw.config.get("wgNamespaceNumber") == 0) {
    mw.loader.using("mediawiki.util", () => {
        $(document).ready(() => { 
            var link = mw.util.addPortletLink( "p-cactions", "#", "Fix Dates", "ca-fixdates", "Fix Dates"); 
            $(link).click(event => {
                event.preventDefault();
                fixDates();
            });
        });
    });
}
function getDateType(str) {
  const dateTypeReg = /{{\s*(?:use ?)?(?<datetype>dmy|mdy)(?: ?dates)?\s*/mi;
    let match = dateTypeReg.exec(str);
    if(match != null) {
        return match.groups.datetype.toLowerCase();
  } else {
    return null;
  }
}

function currPage() {
    return mw.config.get("wgPageName");
}

function getPageWikitext(page, callback) {
    const send_req = {
	    action: "query",
	    titles: currPage(),
	    prop: "revisions",
	    intoken: "edit",
	    rvprop: "content",
	    indexpageids: 1,
	    dataType: "xml",
	    format: "xml"
	};
    $.get(mw.config.get("wgScriptPath") + "/api.php", send_req, response => {
        const text = $(response).find("rev").text();
        callback(text);
    });
}

function goToShowChangesScreen({title = currPage(), text, summary}) {
	let titleEncoded = encodeURIComponent(title.replace(/ /g, "_")); /* must incl namespace */
	let wgServer = mw.config.get('wgServer');
	let wgScriptPath = mw.config.get('wgScriptPath');
	let baseURL = wgServer + wgScriptPath + '/';
	$(`<form action="${baseURL}index.php?title=${titleEncoded}&action=submit" method="POST"/>`)
		.append($('<input type="hidden" name="wpTextbox1">').val(text))
		.append($('<input type="hidden" name="wpSummary">').val(summary))
		.append($('<input type="hidden" name="mode">').val('preview'))
		.append($('<input type="hidden" name="wpDiff">').val('Show changes'))
		.append($('<input type="hidden" name="wpUltimateParam">').val('1'))
		.appendTo($(document.body))
		.submit();
}

function fixDates() {
    const months = "January,February,March,April,May,June,July,August,September,October,November,December".split(",");
    const ymdReg = /(?<=\|\w*-?date=)(?<year>\d{4})-(?<month>\d{2})-(?<date>\d{2})/gmi;
    getPageWikitext(currPage(), wikitext => {
        let dateType = getDateType(wikitext);
        if(!dateType) {
        	alert("No date type used");
        	return;
        }
        let fixedNo = 0;
        var fmtEg = "";
        if (dateType == "dmy") {
            wikitext = wikitext.replace(ymdReg, (match, p0, p1, p2, off, str, {year, month, date}) => {
                fixedNo++;
                if (!fmtEg) fmtEg = `${year}-${month}-${date} &rarr; ${parseInt(date)} ${months[parseInt(month)-1]} ${year}`;
                return `${parseInt(date)} ${months[parseInt(month)-1]} ${year}`;
            });
        } else if (dateType == "mdy") {
        	wikitext = wikitext.replace(/(?<=\|\w*-?date\s*=\s*)(?<date>\d{1,2}) (?<month>\w+) (?<year>\d{4})/gmi, (match, p0, p1, p2, off, str, {date, month, year}) => {
        		fixedNo++;
        		if (!fmtEg) fmtEg = `${date} ${month} ${year} &rarr; ${month} ${parseInt(date)}, ${year}`;
        		return `${month} ${parseInt(date)}, ${year}`;
        	});
        }
		if(fixedNo == 0 || !fmtEg) {
			alert("No dates to be fixed");
			return;
		}
        goToShowChangesScreen({text: wikitext, summary: `Formatted ${fixedNo} date(s) to ${dateType} format; eg. ${fmtEg}, using a [[User:Satricious/dateFixer.js|script]]`});
    });
}
/* </nowiki> */