resources/js/components/book-sort.js
import Sortable, {MultiDrag} from 'sortablejs';
import {Component} from './component';
import {htmlToDom} from '../services/dom';
// Auto sort control
const sortOperations = {
name(a, b) {
const aName = a.getAttribute('data-name').trim().toLowerCase();
const bName = b.getAttribute('data-name').trim().toLowerCase();
return aName.localeCompare(bName);
},
created(a, b) {
const aTime = Number(a.getAttribute('data-created'));
const bTime = Number(b.getAttribute('data-created'));
return bTime - aTime;
},
updated(a, b) {
const aTime = Number(a.getAttribute('data-updated'));
const bTime = Number(b.getAttribute('data-updated'));
return bTime - aTime;
},
chaptersFirst(a, b) {
const aType = a.getAttribute('data-type');
const bType = b.getAttribute('data-type');
if (aType === bType) {
return 0;
}
return (aType === 'chapter' ? -1 : 1);
},
chaptersLast(a, b) {
const aType = a.getAttribute('data-type');
const bType = b.getAttribute('data-type');
if (aType === bType) {
return 0;
}
return (aType === 'chapter' ? 1 : -1);
},
};
/**
* The available move actions.
* The active function indicates if the action is possible for the given item.
* The run function performs the move.
* @type {{up: {active(Element, ?Element, Element): boolean, run(Element, ?Element, Element)}}}
*/
const moveActions = {
up: {
active(elem, parent) {
return !(elem.previousElementSibling === null && !parent);
},
run(elem, parent) {
const newSibling = elem.previousElementSibling || parent;
newSibling.insertAdjacentElement('beforebegin', elem);
},
},
down: {
active(elem, parent) {
return !(elem.nextElementSibling === null && !parent);
},
run(elem, parent) {
const newSibling = elem.nextElementSibling || parent;
newSibling.insertAdjacentElement('afterend', elem);
},
},
next_book: {
active(elem, parent, book) {
return book.nextElementSibling !== null;
},
run(elem, parent, book) {
const newList = book.nextElementSibling.querySelector('ul');
newList.prepend(elem);
},
},
prev_book: {
active(elem, parent, book) {
return book.previousElementSibling !== null;
},
run(elem, parent, book) {
const newList = book.previousElementSibling.querySelector('ul');
newList.appendChild(elem);
},
},
next_chapter: {
active(elem, parent) {
return elem.dataset.type === 'page' && this.getNextChapter(elem, parent);
},
run(elem, parent) {
const nextChapter = this.getNextChapter(elem, parent);
nextChapter.querySelector('ul').prepend(elem);
},
getNextChapter(elem, parent) {
const topLevel = (parent || elem);
const topItems = Array.from(topLevel.parentElement.children);
const index = topItems.indexOf(topLevel);
return topItems.slice(index + 1).find(item => item.dataset.type === 'chapter');
},
},
prev_chapter: {
active(elem, parent) {
return elem.dataset.type === 'page' && this.getPrevChapter(elem, parent);
},
run(elem, parent) {
const prevChapter = this.getPrevChapter(elem, parent);
prevChapter.querySelector('ul').append(elem);
},
getPrevChapter(elem, parent) {
const topLevel = (parent || elem);
const topItems = Array.from(topLevel.parentElement.children);
const index = topItems.indexOf(topLevel);
return topItems.slice(0, index).reverse().find(item => item.dataset.type === 'chapter');
},
},
book_end: {
active(elem, parent) {
return parent || (parent === null && elem.nextElementSibling);
},
run(elem, parent, book) {
book.querySelector('ul').append(elem);
},
},
book_start: {
active(elem, parent) {
return parent || (parent === null && elem.previousElementSibling);
},
run(elem, parent, book) {
book.querySelector('ul').prepend(elem);
},
},
before_chapter: {
active(elem, parent) {
return parent;
},
run(elem, parent) {
parent.insertAdjacentElement('beforebegin', elem);
},
},
after_chapter: {
active(elem, parent) {
return parent;
},
run(elem, parent) {
parent.insertAdjacentElement('afterend', elem);
},
},
};
export class BookSort extends Component {
setup() {
this.container = this.$el;
this.sortContainer = this.$refs.sortContainer;
this.input = this.$refs.input;
Sortable.mount(new MultiDrag());
const initialSortBox = this.container.querySelector('.sort-box');
this.setupBookSortable(initialSortBox);
this.setupSortPresets();
this.setupMoveActions();
window.$events.listen('entity-select-change', this.bookSelect.bind(this));
}
/**
* Set up the handlers for the item-level move buttons.
*/
setupMoveActions() {
// Handle move button click
this.container.addEventListener('click', event => {
if (event.target.matches('[data-move]')) {
const action = event.target.getAttribute('data-move');
const sortItem = event.target.closest('[data-id]');
this.runSortAction(sortItem, action);
}
});
this.updateMoveActionStateForAll();
}
/**
* Set up the handlers for the preset sort type buttons.
*/
setupSortPresets() {
let lastSort = '';
let reverse = false;
const reversibleTypes = ['name', 'created', 'updated'];
this.sortContainer.addEventListener('click', event => {
const sortButton = event.target.closest('.sort-box-options [data-sort]');
if (!sortButton) return;
event.preventDefault();
const sortLists = sortButton.closest('.sort-box').querySelectorAll('ul');
const sort = sortButton.getAttribute('data-sort');
reverse = (lastSort === sort) ? !reverse : false;
let sortFunction = sortOperations[sort];
if (reverse && reversibleTypes.includes(sort)) {
sortFunction = function reverseSortOperation(a, b) {
return 0 - sortOperations[sort](a, b);
};
}
for (const list of sortLists) {
const directItems = Array.from(list.children).filter(child => child.matches('li'));
directItems.sort(sortFunction).forEach(sortedItem => {
list.appendChild(sortedItem);
});
}
lastSort = sort;
this.updateMapInput();
});
}
/**
* Handle book selection from the entity selector.
* @param {Object} entityInfo
*/
bookSelect(entityInfo) {
const alreadyAdded = this.container.querySelector(`[data-type="book"][data-id="${entityInfo.id}"]`) !== null;
if (alreadyAdded) return;
const entitySortItemUrl = `${entityInfo.link}/sort-item`;
window.$http.get(entitySortItemUrl).then(resp => {
const newBookContainer = htmlToDom(resp.data);
this.sortContainer.append(newBookContainer);
this.setupBookSortable(newBookContainer);
this.updateMoveActionStateForAll();
const summary = newBookContainer.querySelector('summary');
summary.focus();
});
}
/**
* Set up the given book container element to have sortable items.
* @param {Element} bookContainer
*/
setupBookSortable(bookContainer) {
const sortElems = Array.from(bookContainer.querySelectorAll('.sort-list, .sortable-page-sublist'));
const bookGroupConfig = {
name: 'book',
pull: ['book', 'chapter'],
put: ['book', 'chapter'],
};
const chapterGroupConfig = {
name: 'chapter',
pull: ['book', 'chapter'],
put(toList, fromList, draggedElem) {
return draggedElem.getAttribute('data-type') === 'page';
},
};
for (const sortElem of sortElems) {
Sortable.create(sortElem, {
group: sortElem.classList.contains('sort-list') ? bookGroupConfig : chapterGroupConfig,
animation: 150,
fallbackOnBody: true,
swapThreshold: 0.65,
onSort: () => {
this.ensureNoNestedChapters();
this.updateMapInput();
this.updateMoveActionStateForAll();
},
dragClass: 'bg-white',
ghostClass: 'primary-background-light',
multiDrag: true,
multiDragKey: 'Control',
selectedClass: 'sortable-selected',
});
}
}
/**
* Handle nested chapters by moving them to the parent book.
* Needed since sorting with multi-sort only checks group rules based on the active item,
* not all in group, therefore need to manually check after a sort.
* Must be done before updating the map input.
*/
ensureNoNestedChapters() {
const nestedChapters = this.container.querySelectorAll('[data-type="chapter"] [data-type="chapter"]');
for (const chapter of nestedChapters) {
const parentChapter = chapter.parentElement.closest('[data-type="chapter"]');
parentChapter.insertAdjacentElement('afterend', chapter);
}
}
/**
* Update the input with our sort data.
*/
updateMapInput() {
const pageMap = this.buildEntityMap();
this.input.value = JSON.stringify(pageMap);
}
/**
* Build up a mapping of entities with their ordering and nesting.
* @returns {Array}
*/
buildEntityMap() {
const entityMap = [];
const lists = this.container.querySelectorAll('.sort-list');
for (const list of lists) {
const bookId = list.closest('[data-type="book"]').getAttribute('data-id');
const directChildren = Array.from(list.children)
.filter(elem => elem.matches('[data-type="page"], [data-type="chapter"]'));
for (let i = 0; i < directChildren.length; i++) {
this.addBookChildToMap(directChildren[i], i, bookId, entityMap);
}
}
return entityMap;
}
/**
* Parse a sort item and add it to a data-map array.
* Parses sub0items if existing also.
* @param {Element} childElem
* @param {Number} index
* @param {Number} bookId
* @param {Array} entityMap
*/
addBookChildToMap(childElem, index, bookId, entityMap) {
const type = childElem.getAttribute('data-type');
const parentChapter = false;
const childId = childElem.getAttribute('data-id');
entityMap.push({
id: childId,
sort: index,
parentChapter,
type,
book: bookId,
});
const subPages = childElem.querySelectorAll('[data-type="page"]');
for (let i = 0; i < subPages.length; i++) {
entityMap.push({
id: subPages[i].getAttribute('data-id'),
sort: i,
parentChapter: childId,
type: 'page',
book: bookId,
});
}
}
/**
* Run the given sort action up the provided sort item.
* @param {Element} item
* @param {String} action
*/
runSortAction(item, action) {
const parentItem = item.parentElement.closest('li[data-id]');
const parentBook = item.parentElement.closest('[data-type="book"]');
moveActions[action].run(item, parentItem, parentBook);
this.updateMapInput();
this.updateMoveActionStateForAll();
item.scrollIntoView({behavior: 'smooth', block: 'nearest'});
item.focus();
}
/**
* Update the state of the available move actions on this item.
* @param {Element} item
*/
updateMoveActionState(item) {
const parentItem = item.parentElement.closest('li[data-id]');
const parentBook = item.parentElement.closest('[data-type="book"]');
for (const [action, functions] of Object.entries(moveActions)) {
const moveButton = item.querySelector(`[data-move="${action}"]`);
moveButton.disabled = !functions.active(item, parentItem, parentBook);
}
}
updateMoveActionStateForAll() {
const items = this.container.querySelectorAll('[data-type="chapter"],[data-type="page"]');
for (const item of items) {
this.updateMoveActionState(item);
}
}
}