framework/js/lib/utils/item-list.js

60 lines
1.4 KiB
JavaScript

export class Item {
constructor(content, position) {
this.content = content;
this.position = position;
}
}
export default class ItemList {
add(key, content, position) {
this[key] = new Item(content, position);
}
merge(items) {
for (var i in items) {
if (items.hasOwnProperty(i) && items[i] instanceof Item) {
this[i] = items[i];
}
}
}
toArray() {
var items = [];
for (var i in this) {
if (this.hasOwnProperty(i) && this[i] instanceof Item) {
items.push(this[i]);
}
}
var array = [];
var addItems = function(method, position) {
items = items.filter(function(item) {
if ((position && item.position && item.position[position]) || (!position && !item.position)) {
array[method](item);
} else {
return true;
}
});
};
addItems('unshift', 'first');
addItems('push', false);
addItems('push', 'last');
items.forEach(item => {
var key = item.position.before || item.position.after;
var type = item.position.before ? 'before' : 'after';
if (key) {
var index = array.indexOf(this[key]);
if (index === -1) {
index = type === 'before' ? 0 : array.length;
}
array.splice(index + (type === 'after' ? 1 : 0), 0, item);
}
});
return array.map((item) => item.content);
}
}