User:JPxG/TrackSum.js

Code that you insert on this page could contain malicious content capable of compromising your account. If you import a script from another page with "importScript", "mw.loader.load", "iusc", or "lusc", take note that this causes you to dynamically load a remote script, which could be changed by others. Editors are responsible for all edits and actions they perform, including by scripts. User scripts are not centrally supported and may malfunction or become inoperable due to software changes. A guide to help you find broken scripts is available. If you are unsure whether code you are adding to this page is safe, you can ask at the appropriate village pump.
This code will be executed when previewing this page.

Documentation for this user script can be added at User:JPxG/TrackSum.

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.

// If you are editing a page, this script gives you a button to click and automatically sum up all the track lengths in [[Template:Tracklist]] to provide a total length.
// Skeleton of this code forked from Wikipedia:WikiProject User scripts/Scripts/Quick wikify
// - JPxG, 2021 September 3

function getIndices(strang, substrang) {
    var indices = [], i = -1;
    while ((i = strang.indexOf(substrang, i+1)) != -1){
        indices.push(i);
    } // Close loop to increment over the strang.
    return indices;
} // Function to get indices of a substring in a string.


function doTracksum() {
	tbox = document.editform.wpTextbox1.value;
	// Get the text from the edit box and store it as "tbox".
	obox = "";
	// Initialize blank output string.
	var cursor = 0;
	// Set cursor to zero.
	var indax = getIndices(tbox, "{{tracklist");
	indax = indax.concat(getIndices(tbox, "{{Tracklist"));
	indax = indax.concat(getIndices(tbox, "{{Track listing"));
	indax = indax.concat(getIndices(tbox, "{{Track Listing"));
	indax = indax.concat(getIndices(tbox, "{{track listing"));
	indax = indax.concat(getIndices(tbox, "{{Tracklisting"));
	indax = indax.concat(getIndices(tbox, "{{tracklisting"));
	indax = indax.concat(getIndices(tbox, "{{Soundtrack"));
	indax = indax.concat(getIndices(tbox, "{{soundtrack"));
	indax = indax.sort();
	// We now have an array, "indax", of every index where a tracklist template appears.
	obox = tbox.substring(0, indax[0]);
	// Store everything before the first tracklist template into obox.
	for (let i = 0; i < indax.length; i++){
		if (i == indax.length){
			j = indax.length;
		} else {
			j = indax[i+1];
		}
		slice = tbox.substring(indax[i], j);
		openbraces = getIndices(slice, "{{");
		closebraces = getIndices(slice, "}}");
		allbraces = openbraces.concat(closebraces).sort();
		lastbrace = allbraces[allbraces.length];
		// Get the last of all braces in the slice.
		braceStatus = 0;
		lastInSlice = 0;
		for(var incre = 0; incre < slice.length; incre++) {
			if(openbraces.includes(incre)) {braceStatus++}
			if(closebraces.includes(incre)) {braceStatus--}
			if(braceStatus == 0) {lastInSlice = incre;break}
		} // Try to find the closing brace of the whole darn slice.
		obox = obox + slice.substring(0,lastInSlice) + "\n| total_length = " + slice.substring(lastInSlice)
		// Reconstitute the tbox.
	} // Everything in the darn obox.
	//obox = obox + tbox.substring(indax[indax.length])
	// Add the last bit of the tbox into obox.
	
	document.editform.wpTextbox1.value = "Found at" + indax.toString() + obox;
	// document.editform.wpTextbox1.value = '{' + '{' + 'Wikify|date=' + '{' + '{' + 'subst:CURRENTMONTHNAME}} ' + '{' + '{' + 'subst:CURRENTYEAR}}}}\n\n' + document.editform.wpTextbox1.value;
	document.editform.wpSummary.value = "Automatically summed track lengths [script-assisted: JPxG's [[User:JPxG/tracksum.js|TrackSum]] V0.1]";
	document.editform.wpMinoredit.checked = true;
	//document.editform.submit();
} // function to replace the stuff with the other stuff

addOnloadHook(function() {
	if (document.editform) {
		addPortletLink("p-cactions", "javascript:doTracksum()", "Tracksum", "ca-tracksum", "Sum up track lengths in tracklist template", "");
	}
}); // onloadhook

// by [[User:Raylu|raylu]]
// </nowiki></pre>