From 7da7a6b91cf7bb0cf1c6716ba3eec869953ff31a Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Sat, 20 Feb 2021 00:29:54 +0100
Subject: [PATCH] Draft Pages module

---
 src/pages/index.js | 97 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 src/pages/index.js

diff --git a/src/pages/index.js b/src/pages/index.js
new file mode 100644
index 000000000..c663deab6
--- /dev/null
+++ b/src/pages/index.js
@@ -0,0 +1,97 @@
+import { isString } from 'underscore';
+
+export default () => {
+  const evPfx = `page:`;
+
+  return {
+    name: 'Pages',
+
+    /**
+     * Initialize module
+     * @param {Object} config Configurations
+     * @private
+     */
+    init(opts = {}) {
+      const { em } = opts;
+      this.config = { ...opts };
+      const pages = [];
+      pages.on('add', (p, c, o) => em.trigger(`${evPfx}add`, p, o));
+      pages.on('remove', (p, c, o) => em.trigger(`${evPfx}remove`, p, o));
+      this.em = em;
+      this.pages = pages;
+
+      return this;
+    },
+
+    /**
+     * Add new page
+     * @param {Object} props Page properties
+     * @param {Object} [options] Options
+     * @returns {Page}
+     */
+    add(props, opts = {}) {
+      props.id = props.id || this._createId();
+      return this.pages.add(props, opts);
+    },
+
+    /**
+     * Remove page
+     * @param {String|Page} page Page or page id
+     * @returns {Page}
+     */
+    remove(pg) {
+      const page = isString(pg) ? this.get(pg) : pg;
+      page && this.pages.remove(page);
+      return page;
+    },
+
+    /**
+     * Get page by id
+     * @param {String} id Page id
+     * @returns {Page}
+     */
+    get(id) {
+      return this.pages.filter(p => p.get('id') === id)[0];
+    },
+
+    /**
+     * Get all pages
+     */
+    getAll() {
+      return this.pages;
+    },
+
+    /**
+     * Select page
+     * @param {String|Page} page Page or page id
+     * @returns {this}
+     */
+    select(pg) {
+      const page = isString(pg) ? this.get(pg) : pg;
+      this.selected = page;
+      this.em.trigger(`${evPfx}:select`, page);
+      return this;
+    },
+
+    /**
+     * Get the selected page
+     * @returns {Page}
+     */
+    getSelected() {
+      return this.selected;
+    },
+
+    /**
+     * Destroy all
+     */
+    destroy() {
+      this.pages.off().reset();
+      ['selected', 'config', 'em', 'pages'].map(i => (this[i] = 0));
+    },
+
+    // TODO
+    _createId() {
+      return Math.random();
+    }
+  };
+};