Hydrilla

/**

 * SPDX-License-Identifier: Apache-2.0

 *

 * Copyright © 2021 jahoti <jahoti@tilde.team>

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *    http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

var pathParts = location.pathname.split('/'), itemRef = pathParts[pathParts.length - 1];

// Generate a function which, when invoked, loads the catalog holdings starting at i (one-indexed) focused on loc

function generateGoTo(i, set_loc) {

	return function () {

		; // If this is a new search, "set_loc" won't be set; set it

		var xhr = new content.XMLHttpRequest(), loc = set_loc || encodeURIComponent(locInput.value);

		xhr.onreadystatechange = function () {

			if (this.readyState === 4) {

				if (this.status === 200) {

					retrieved.innerHTML = this.responseText;

					var i, node = document.getElementById('libslocator');

					node.parentNode.removeChild(node);

					for (node of retrieved.querySelectorAll('a[href^="javascript:findLibs(\'\', "]')) {

						i = parseInt(node.href.split(',', 2)[1]);

						node.onclick = generateGoTo(i, loc);

					}

				}

				else alert('Search failed: response code ' + this.status);

			}

		}

		xhr.open('GET', 'https://www.worldcat.org/wcpa/servlet/org.oclc.lac.ui.ajax.ServiceServlet?wcoclcnum=' + itemRef + '&start_holding='

				+ i + '&serviceCommand=holdingsdata&loc=' + loc, true);

		xhr.send();

		return false; // Make sure the browser doesn't try to submit any holding form

	};

}

var retriever = document.querySelector('.retrieving'), retrieved = document.getElementById('donelocator');

var locForm = document.createElement('form'), locLabel = document.createElement('label'), locInput = document.createElement('input'),

	locSubmit = document.createElement('input');

locForm.appendChild(locLabel);

locForm.appendChild(locInput);

locForm.appendChild(locSubmit);

locInput.name = locLabel.htmlFor = 'cat_location';

locInput.type = 'text';

locInput.required = 'yes';

locLabel.innerText = 'Find copies closest to: ';

locSubmit.value = 'Go';

locSubmit.type = 'submit';

locForm.onsubmit = generateGoTo(1);

retriever.parentNode.replaceChild(locForm, retriever);