@jsynple/core/dist/services/lists/ListService.js

All the core modules and types for the Synple application

import { find, findIndex, remove } from 'lodash';
/**
 * A list service provides utility methods for handling lists of specific items, a thing we tend to do
 * a lot in the applciation, especially on the administration side. It allows the addition, update and
 * removal of items on a list, by calling the specific methods on the linked repository for this kind
 * of items.
 * @author Vincent Courtois <courtois.vincent@outlook.com>
 */
export class ListService {
    constructor(repository, token) {
        // The list of items queried on the repository, supposed to reflect the state on the API.
        this.items = [];
        this.repository = repository;
        this.token = token;
    }
    async fetch() {
        const results = this.repository.list(this.token);
        results.then((items = []) => {
            for (const item of items)
                this.append(item);
        });
        return results;
    }
    get all() {
        return this.items;
    }
    async create(item) {
        const promise = this.repository.create(item, this.token);
        promise.then((item) => this.append(item));
        return promise;
    }
    update(item) {
        const index = findIndex(this.items, i => i.id === item.id);
        if (index >= 0) {
            const newItem = { ...this.items[index], ...item };
            this.items[index] = newItem;
            return this.repository.update(newItem, this.token);
        }
    }
    delete(item) {
        const id = typeof item === 'string' ? item : item.id;
        this.repository.delete(id, this.token);
        remove(this.items, (iteratee) => id === iteratee.id);
    }
    append(item) {
        if (!find(this.items, { id: item.id }))
            this.items.push(item);
    }
}