From eeeb266fd27de83a7c9869fb368030577c9f5a66 Mon Sep 17 00:00:00 2001
From: Benjamin Wegener <me@benni.games>
Date: Sun, 19 Nov 2023 16:32:20 +0000
Subject: [PATCH] feat(core) basic structure

---
 lib/core/Cetra.js | 136 ++++++++++++++++++++++++++++++++++++++++++++++
 lib/lib.js        |   3 +
 2 files changed, 139 insertions(+)
 create mode 100644 lib/core/Cetra.js
 create mode 100644 lib/lib.js

diff --git a/lib/core/Cetra.js b/lib/core/Cetra.js
new file mode 100644
index 0000000..2f7e102
--- /dev/null
+++ b/lib/core/Cetra.js
@@ -0,0 +1,136 @@
+import Emitter from './Emitter';
+import Logger from './Logger';
+class Cetra extends Emitter {
+	// class static globals
+	static #instances = new Map();
+	static #uidIndex = new Set();
+	static #defaultSettings = new Map([
+		['selector', 'ctra'],
+		['root', document.body],
+	#identifier;
+	#internals = new Map([
+		['settings', new Map()],
+	]);
+
+	/**
+	 * Constructs a new instance of the Cetra framework.
+	 * @class
+	 * @classdesc The Cetra framework provides a reactive approach to DOM manipulation and component management.
+	 * @param {Map} settings - A map object containing the framework settings.
+	 */
+	constructor(options = new Map()) {
+		super();
+		this.#identifier = this.uid();
+		this.#init();
+	}
+
+	/**
+	 * Retrieves an instance of Cetra by its ID.
+	 * @param {string} id - The ID of the Cetra instance to retrieve.
+	 * @returns {Cetra} The Cetra instance with the specified ID.
+	 */
+	static getInstance(id) {
+		return Cetra.#instances.get(id);
+	}
+
+	/**
+	 * Initializes the Cetra framework by setting up the mutation observer and processing existing components.
+	 * @memberof Cetra
+	 * @instance
+	 * @method
+	 */
+	#init() {
+		this.#root =
+			this.#internals.get('settings').get('root') ||
+			document.querySelector(this.#internals.get('settings').get('root'));
+
+		if (typeof this.#root == 'string') {
+			this.#root = document.querySelector(this.#root);
+
+			if (!this.#root) {
+				Logger.error('No root found, defaulting to body');
+				this.#root = document.body;
+			}
+		}
+
+		this.#registerDefaults();
+
+		this.#root.setAttribute(
+			`data-${this.#internals.get('settings').get('selector')}-id`,
+			this.#identifier
+		);
+
+		Cetra.#instances.set(this.#identifier, this);
+		this.emit('afterInit', this);
+	}
+
+	/**
+	 * Registers default properties, transformer or anything related to the functionality
+	 * @returns {void}
+	 */
+	#registerDefaults() {
+	}
+
+	/**
+	 * checks if the given url is valid
+	 * @param {String} url the url to check
+	 * @returns {Boolean} true if the url is valid, false otherwise
+	 */
+	#isUrl(url) {
+		if (typeof url != 'string') return false;
+		try {
+			// if there is no error this should be a valid url
+			const urlObj = new URL(url, window.location.href);
+			return this.#internals.get('settings').get('enforceSecureUrls')
+				? urlObj.protocol === 'https:'
+				: true;
+		} catch (err) {
+			// any error is a bad url
+			return false;
+		}
+	}
+
+	/**
+	 * Generates a (internally)unique identifier.
+	 * @param {number} [numGroups=1] - The number of groups to generate.
+	 * @param {number} [groupLength=6] - The length of each group.
+	 * @memberof Cetra
+	 * @method
+	 * @returns {string} The unique identifier.
+	 */
+	uid(numGroups = 1, groupLength = 6) {
+		const usedIds = new Set(Cetra.#uidIndex.values());
+
+		let uid = undefined;
+
+		while (!uid || usedIds.has(uid)) {
+			uid = Array.from(Array(numGroups), () =>
+				Math.random()
+					.toString(36)
+					.substring(2, groupLength + 2)
+			).join('');
+		}
+
+		Cetra.#uidIndex.add(uid);
+
+		return uid;
+	}
+
+	/**
+	 * Retrieves the value of the specified option from the framework's settings.
+	 * @memberof Cetra
+	 * @instance
+	 * @method
+	 * @param {string} option - The name of the option to retrieve.
+	 * @returns {*} The value of the specified option.
+	 */
+	getOption(key) {
+		if (typeof key != 'string')
+			throw new Error('given key is not a string!');
+		return this.#internals
+			.get('settings')
+			.get(key.toString().toLowerCase());
+	}
+}
+
+export default Cetra;
diff --git a/lib/lib.js b/lib/lib.js
new file mode 100644
index 0000000..6086729
--- /dev/null
+++ b/lib/lib.js
@@ -0,0 +1,3 @@
+import Cetra from "./core/Cetra";
+
+export default Cetra;
\ No newline at end of file