User:Animum/massdelete.js

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Documentation for this user script can be added at User:Animum/massdelete.
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mw.loader.using(['mediawiki.api.edit', 'mediawiki.Title'], function () {
	"use strict";

	var config = mw.config.get(['wgNamespaceNumber', 'wgTitle', 'wgUserGroups', 'skin']);

	function removeBlanks(arr) {
		var ret = [];
		var i, len;
		for (i = 0, len = arr.length; i < len; i++) {
			var s = arr[i];
			s = s.trim();
			if (s) {
				ret.push(s);
			}
		}
		return ret;
	}

	function doMassDelete() {
		document.getElementById("wpMassDeleteSubmit").disabled = true;
		var articles = document.getElementById("wpMassDeletePages").value.split("\n");
		articles = removeBlanks(articles);
		if (!articles.length) {
			return;
		}
		var
			api = new mw.Api(),
			wpMassDeleteReasons = document.getElementById("wpMassDeleteReasons").value,
			wpMassDeleteReason = document.getElementById("wpMassDeleteReason").value,
			deleted = 0,
			failed = [],
			error = [],
			deferreds = [],
			reason = wpMassDeleteReasons == "other" ?
				wpMassDeleteReason :
				wpMassDeleteReasons + (wpMassDeleteReason ? " (" + wpMassDeleteReason + ")" : ""),
			onSuccess = function () {
				deleted++;
				document.getElementById("wpMassDeleteSubmit").value = "(" + deleted + ")";
			};

		function makeDeleteFunc(article) {
			return function () {
				return $.Deferred(function (deferred) {
					var promise = api.postWithToken('delete', {
						format: 'json',
						action: 'delete',
						title: article,
						reason: reason
					});
					promise.done(onSuccess);
					promise.fail(function (code, obj) {
						failed.push(article);
						error.push(obj.error.info);
					});
					promise.always(function () {
						deferred.resolve();
					});
				});
			};
		}

		// Make a chain of deferred objects. We chain them rather than execute them in
		// parallel so that we don't make 1000 simultaneous delete requests and bring the
		// site down. We use deferred objects rather than the promise objects returned
		// from the API request so that the chain continues even if some articles gave
		// errors.
		var deferred = makeDeleteFunc(articles[0])();
		for (var i = 1, len = articles.length; i < len; i++) {
			deferred = deferred.then(makeDeleteFunc(articles[i]));
		}

		// Show the output and do cleanup once all the requests are done.
		$.when(deferred).then(function () {
			document.getElementById("wpMassDeleteSubmit").value = "Done (" + deleted + ")";
			if (failed.length) {
				var $failedList = $('<ul>');
				for(var x = 0; x < failed.length; x++) {
					// Link the titles in the "failed" array
					var failedTitle = mw.Title.newFromText(failed[x]);
					var $failedItem = $('<li>');
					if (failedTitle) {
						$failedItem.append( $('<a>')
							.attr('href', failedTitle.getUrl())
							.text(failed[x])
						);
					} else {
						$failedItem.text(failed[x]);
					}
					$failedItem.append(document.createTextNode(': ' + error[x]));
					$failedList.append($failedItem);
				}
				$('#wpMassDeleteFailedContainer')
					.append($('<br />'))
					.append($('<b>')
						.text('Failed deletions:')
					)
					.append($failedList);
			}
		});
	}
	 
	function massdeleteform() {
		var bodyContent = (config.skin == "cologneblue" ? "article" : "bodyContent");
		document.getElementsByTagName("h1")[0].textContent = "Animum's mass-deletion tool";
		document.title = "Animum's mass-deletion tool - Wikipedia, the free encyclopedia";
		document.getElementById(bodyContent).innerHTML = '<h3 id="siteSub">From Wikipedia, the free encyclopedia</h3><br /><br />' +
			'<form id="wpMassDelete" name="wpMassDelete">' +
			'<b>If you abuse this tool, it\'s <i>your</i> fault, not mine.</b>' +
			'<div id="wpMassDeleteFailedContainer"></div>' +
			'<br /><br />' +
				'Pages to delete (one on each line, please):<br />' +
					'<textarea tabindex="1" accesskey="," name="wpMassDeletePages" id="wpMassDeletePages" rows="10" cols="80"></textarea>' +
				'<br /><br /><table style="background-color:transparent">' +
					'<tr><td>Common reasons:</td>' +
						'<td><select id="wpMassDeleteReasons">' +
							'<optgroup label="Other reason">' +
								'<option value="other">Other reason</option>' +
							'</optgroup>' +
							'<optgroup label="Criteria for speedy deletion">' +
								'<optgroup label="General criteria">' +
									'<option value="[[WP:CSD#G1|G1]]: [[WP:PN|Patent nonsense]], meaningless, or incomprehensible">G1: Patent nonsense</option>' +
									'<option value="[[WP:CSD#G2|G2]]: Test page">G2: Test page</option>' +
									'<option value="[[WP:CSD#G3|G3]]: [[WP:Vandalism|Vandalism]]">G3: Vandalism</option>' +
									'<option value="[[WP:CSD#G4|G4]]: Recreation of a page that was [[WP:DEL|deleted]] per a [[WP:XFD|deletion discussion]]">G4: Repost</option>' +
									'<option value="[[WP:CSD#G5|G5]]: Creation by a [[WP:BLOCK|blocked]] or [[WP:BAN|banned]] user in violation of block or ban">G5: Banned</option>' +
									'<option value="[[WP:CSD#G6|G6]]: Housekeeping and routine (non-controversial) cleanup">G6: Maintenance</option>' +
									'<option value="[[WP:CSD#G7|G7]]: One author who has requested deletion or blanked the page">G7: Author</option>' +
									'<option value="[[WP:CSD#G8|G8]]: Page dependent on a deleted or nonexistent page">G8: Orphaned talk page</option>' +
									'<option value="[[WP:CSD#G10|G10]]: [[WP:ATP|Attack page]] or negative unsourced [[WP:BLP|BLP]]">G10: Attack page</option>' +
									'<option value="[[WP:CSD#G11|G11]]: Unambiguous [[WP:ADS|advertising]] or promotion">G11: Advertising</option>' +
									'<option value="[[WP:CSD#G12|G12]]: Unambiguous [[WP:C|copyright infringement]]">G12: Copyvio</option>' +
								'</optgroup>' +
								'<optgroup label="Articles">' +
									'<option value="[[WP:CSD#A1|A1]]: Not enough context to identify article\'s subject">A1: No context</option>' +
									'<option value="[[WP:CSD#A2|A2]]: Article in a foreign language that exists on another project">A2: Foreign</option>' +
									'<option value="[[WP:CSD#A3|A3]]: Article that has no meaningful, substantive content">A3: No content</option>' +
									'<option value="[[WP:CSD#A5|A5]]: Article that has been transwikied to another project">A5: Transwiki</option>' +
									'<option value="[[WP:CSD#A7|A7]]: No explanation of the subject\'s significance (real person, animal, organization, or web content)">A7: Non-notable real person, animal, organization, or web content</option>' +
									'<option value="[[WP:CSD#A9|A9]]: Music recording by redlinked artist and no indication of importance or significance">A9: Non-notable recording by redlinked artist</option>' +
									'<option value="[[WP:CSD#A10|A10]]: Recently created article that duplicates an existing topic">A10: Recently created article that duplicates an existing topic</option>' +
								'</optgroup>' +
								'<optgroup label="Redirects">' +
									'<option value="[[WP:CSD#R2|R2]]: Cross-[[WP:NS|namespace]] [[WP:R|redirect]] from mainspace">R2: Cross-namespace</option>' +
									'<option value="[[WP:CSD#R3|R3]]: Recently created, implausible [[WP:R|redirect]]">R3: Implausible redirect</option>' +
								'</optgroup>' +
								'<optgroup label="Images and other media">' +
									'<option value="[[WP:CSD#F1|F1]]: File redundant to another on Wikipedia">F1: Redundant</option>' +
									'<option value="[[WP:CSD#F2|F2]]: Corrupt or empty file, or a file description page for a file on Commons">F2: Corrupt, empty. or Commons</option>' +
									'<option value="[[WP:CSD#F3|F3]]: File with improper license">F3: File with improper license</option>' +
									'<option value="[[WP:CSD#F4|F4]]: Lack of licensing information">F4: Lack of licensing information</option>' +
									'<option value="[[WP:CSD#F5|F5]]: Unused non-free media">F5: Unfree and unused</option>' +
									'<option value="[[WP:CSD#F6|F6]]: Non-free file without [[WP:RAT|fair-use rationale]]">F6: No rationale</option>' +
									'<option value="[[WP:CSD#F7|F7]]: [[WP:NFCC|Invalid]] fair-use claim">F7: Bad fair use rationale</option>' +
									'<option value="[[WP:CSD#F8|F8]]: Media file available on Commons">F8: On Commons</option>' +
									'<option value="[[WP:CSD#F9|F9]]: File [[WP:COPYVIO|copyright violation]]">F9: File copyvio</option>' +
									'<option value="[[WP:CSD#F10|F10]]: Useless media file">F10: Useless media file</option>' +
									'<option value="[[WP:CSD#F11|F11]]: No evidence of permission">F11: No permission</option>' +
								'</optgroup>' +
								'<optgroup label="Categories">' +
									'<option value="[[WP:CSD#C1|C1]]: Empty category">C1: Empty</option>' +
									'<option value="[[WP:CSD#C2|C2]]: Speedy renaming">C2: Speedy rename</option>' +
									'<option value="[[WP:CSD#G8|G8]]: Populated by deleted or retargeted template">G8: Populated by deleted or retargeted template</option>' +
								'</optgroup>' +
								'<optgroup label="User namespace">' +
									'<option value="[[WP:CSD#U1|U1]]: User request to delete page in own userspace">U1: User requests deletion</option>' +
									'<option value="[[WP:CSD#U2|U2]]: Userpage or subpage of a nonexistent user">U2: Non-existent user</option>' +
									'<option value="[[WP:CSD#U3|U3]]: [[WP:NFC|Non-free]] [[Help:Gallery|gallery]]">U3: Fair use gallery</option>' +
								'</optgroup>' +
								'<optgroup label="Templates">' +
									'<option value="[[WP:CSD#T2|T2]]: Template that unambiguously misrepresents established policy">T2: Blatant misrepresentation</option>' +
									'<option value="[[WP:CSD#T3|T3]]: Unused, redundant template">T3: Redundant and unused</option>' +
									'<option value="[[WP:CSD#G8|G8]]: Component or documentation of a deleted template">G8: component of deleted template</option>' +
								'</optgroup>' +
								'<optgroup label="Portals">' +
									'<option value="[[WP:CSD#P1|P1]]: [[WP:P|Portal]] page that would be subject to speedy deletion as an article">P1: Deletion as article</option>' +
									'<option value="[[WP:CSD#P2|P2]]: [[WP:P|Portal]] without a substantial topic base">P2: Underpopulated</option>' +
								'</optgroup>' +
								'<optgroup label="Other">' +
									'<option value="[[WP:PROD]]: Nominated for seven days with no objection">PRODded for more than 7 days without objection</option>' +
									'<option value="[[WP:BLPPROD]]: Nominated for ten days with no sources present in the article">BLPPRODded for more than 10 days without a source</option>' +
									'<option value="Listed at [[Wikipedia:Copyright problems]] for over seven days">Listed at Copyright problems for over seven days</option>' +
								'</optgroup>' +
							'</optgroup>' +
						'</select></td></tr>' +
				'<tr><td>Other/additional reason:</td>' +
					'<td><input type="text" id="wpMassDeleteReason" name="wpMassDeleteReason" maxlength="255" /></td></tr>' +
					'<tr><td><input type="button" id="wpMassDeleteSubmit" name="wpMassDeleteSubmit" value="Delete" /></td>' +
			'</form>';
		document.getElementById("wpMassDeleteReasons").onchange = function() {
			var maxlength = (document.getElementById("wpMassDeleteReasons").value == "other" ? 255 : 252-document.getElementById("wpMassDeleteReasons").value.length); //It's 252 because of the three characters (" ()") in addition to the selected summary.
			document.getElementById("wpMassDeleteReason").setAttribute("maxlength", maxlength);
		};
		document.getElementById("wpMassDeleteSubmit").addEventListener("click", function (e) {
			doMassDelete();
		});
	}
	 
	if (config.wgNamespaceNumber == -1 &&
		config.wgTitle.toLowerCase() == "massdelete" &&
		/sysop/.test(config.wgUserGroups)
	) {
		massdeleteform();
	}

});