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// SPDX-License-Identifier: AGPL-3.0-or-later
/**
* @licstart The following is the entire license notice for the JavaScript
* code in this page.
*
* This file is part of FreedomBox.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @licend The above is the entire license notice for the JavaScript code
* in this page.
*/
/**
* Update the URL path based on the selected tags.
*
* If no tags are selected, redirects to the base section path. Otherwise,
* constructs a new URL with query parameters for each tag.
*
* @param {string[]} tags - An array of selected tag names.
*/
function updatePathWithTags(tags) {
const sectionPath = window.location.pathname;
if (tags.length === 0) {
this.location.assign(sectionPath);
} else {
const urlParams = new URLSearchParams();
tags.forEach(tag => urlParams.append('tag', tag));
this.location.search = urlParams;
}
}
/**
* Get a list of tags currently displayed, excluding a specific tag if provided.
*
* Iterates through the tag badges in the UI, extracts their text content,
* and returns an array of tag names.
*
* @param {string} [tagToRemove] - The name of the tag to exclude.
* @returns {string[]} An array of tag names currently displayed.
*/
function getTags(tagToRemove) {
const tagElements = document.querySelectorAll('#selected-tags .tag');
return Array.from(tagElements)
.map(tagElement => tagElement.dataset.tag)
.filter(tag => tag !== tagToRemove);
}
/**
* Filter and highlight the best matching tag based on the search term.
*
* This function updates the visibility and highlighting of dropdown items
* to match the user's input in the search box. It determines the best
* matching item and marks it as active.
*
* @param {ElementList} [dropdownItems] - List of items in the tags dropdown.
*/
function findMatchingTag(dropdownItems) {
const addTagInput = document.getElementById('add-tag-input');
const searchTerm = addTagInput.value.toLowerCase().trim();
// Remove highlighting from all items
dropdownItems.forEach(item => item.classList.remove('active'));
let bestMatch = null;
dropdownItems.forEach(item => {
const text = item.dataset.tag_l10n.toLowerCase();
if (text.includes(searchTerm)) {
item.style.display = 'block';
function matchesEarly () {
let bestMatchText = bestMatch.dataset.tag_l10n.toLowerCase();
return text.indexOf(searchTerm) < bestMatchText.indexOf(searchTerm);
};
if (bestMatch === null || matchesEarly()) {
bestMatch = item;
}
} else {
item.style.display = 'none';
}
});
// Highlight the best match
if (bestMatch) {
bestMatch.classList.add('active');
}
}
/**
* Handle a key press event on that tag input field.
*
* As the user types in the input field, the dropdown list is filtered
* to show only matching items. The best matching item (first match if
* multiple match) is highlighted. Pressing Enter selects the
* highlighted item and adds it as a tag.
*
* @param {KeyboardEvent} [event] - The key press event.
*/
function onTagInputKeyUp(event) {
const dropdownItems = document.querySelectorAll('.tag-input li.dropdown-item');
// Select the active tag if the user pressed Enter
if (event.key === 'Enter') {
dropdownItems.forEach(item => {
if (item.classList.contains('active')) {
item.click();
}
});
}
findMatchingTag(dropdownItems);
}
/**
* When an item in the tags dropdown is clicked, navigate to a new URL with the
* added Tag.
*
* @param {PointerEvent} [event] - The click event.
*/
function onTagInputDropdownItemClicked(event) {
const item = event.currentTarget;
const selectedTag = item.dataset.tag;
// Add the selected tag and update the path.
let tags = getTags('');
tags.push(selectedTag);
updatePathWithTags(tags);
// Reset the input field
const addTagInput = document.getElementById('add-tag-input');
addTagInput.value = '';
// Reset the dropdown
const dropdownItems = document.querySelectorAll('.tag-input li.dropdown-item');
dropdownItems.forEach(item => {
item.style.display = 'none';
item.classList.remove('active');
});
}
/**
* when an remove button next to a tag is clicked, navigate to a new URL without
* that Tag.
*
* @param {PointerEvent} [event] - The click event.
*/
function onRemoveTagClicked(event) {
const button = event.currentTarget;
const tag = button.dataset.tag;
const tags = getTags(tag);
updatePathWithTags(tags);
}
/**
* Manage tag-related UI interactions for filtering and displaying apps.
*
* This script manages the user interface for filtering apps based on
* selected tags. It provides functionality for adding and removing tags,
* updating the URL based on selected tags, and displaying a set of
* available tags in a searchable dropdown.
*/
document.addEventListener('DOMContentLoaded', function () {
document.querySelectorAll('.tag').forEach(button => {
button.addEventListener('click', onRemoveTagClicked);
});
const addTagInput = document.getElementById('add-tag-input');
if (addTagInput) { // When page loads without tag input element
addTagInput.addEventListener('keyup', onTagInputKeyUp);
}
const dropdownItems = document.querySelectorAll('.tag-input li.dropdown-item');
dropdownItems.forEach(item => {
item.addEventListener('click', onTagInputDropdownItemClicked);
});
});
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