951cfde278
There are no actual functional changes. This just adds many additional annotations and function which ensure type safety and null safety.
79 lines
2.1 KiB
JavaScript
79 lines
2.1 KiB
JavaScript
/**
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* This file is part of Radicale Server - Calendar Server
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* Copyright © 2026-2026 Max Berger <max@berger.name>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* ErrorHandler manages error messages for a HTMLElement.
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*/
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export class ErrorHandler {
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/**
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* @param {HTMLElement} element
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*/
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constructor(element) {
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/** @type {HTMLElement} */ this._element = element;
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/** @type {string} */ this._lastHTML = "anything_but_blank";
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this.clearError();
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}
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/**
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* Sets an error message for a given key.
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* @param {?string} errorMessage
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*/
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setError(errorMessage) {
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if (errorMessage) {
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this._update([errorMessage]);
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} else {
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this.clearError();
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}
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}
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/**
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* Sets multiple error messages.
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* @param {string[]} errorMessages
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*/
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setErrors(errorMessages) {
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this._update(errorMessages);
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}
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clearError() {
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this._update([]);
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}
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/**
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* Updates the element visibility and text content.
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* @param {string[]} errorMessages
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* @private
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*/
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_update(errorMessages) {
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let html = "";
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if (errorMessages.length > 0) {
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html = errorMessages.join("<br>");
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}
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if (html !== this._lastHTML) {
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this._element.innerHTML = html;
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if (html) {
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this._element.classList.remove("hidden");
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} else {
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this._element.classList.add("hidden");
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}
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this._lastHTML = html;
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}
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}
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}
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