mirror of https://github.com/n2geoff/uhm
78 lines
2.1 KiB
JavaScript
78 lines
2.1 KiB
JavaScript
/**
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* App Builder
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*
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* Composes data, views, actions together as
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* mountable ui
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*
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* @param {Object} opts options
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* @param {Object} opts.state initial app object state
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* @param {Function} opts.view function that returns dom. state and actions are passed in
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* @param {Object} opts.actions object functions includes and return state
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* @param {String} opts.mount querySelector value
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* @returns
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*/
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export default function app(opts) {
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// initial setup
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let data = check(opts.state, {});
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let view = check(opts.view, () => null);
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let actions = check(opts.actions, {});
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let mount = opts.mount || "body";
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/**
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* simple type validation check
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*
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* @param {*} value
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* @param {String} type
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* @returns value|String
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*/
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function check(value, type) {
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return typeof value === typeof type ? value : type;
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}
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// state helper
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const state = (state) => {
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if(typeof state === "object") {
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data = {...data, ...state};
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}
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// update ui
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update();
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// return current state
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return data;
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}
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/**
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* Assigns Dispatch-able Actions into App
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*
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* @param {Object} input state used by actions
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* @param {Object} actions functions that update state
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*/
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function dispatch(input, actions) {
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Object.entries(actions).forEach(([name, action]) => {
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if (typeof action === "function") {
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actions[name] = (...args) => {
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// update date from action return
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Object.assign(data, action(input, ...args));
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// call update
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update();
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};
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}
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});
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update();
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}
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/** update dom */
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const update = () => {
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document.querySelector(mount).replaceChildren(view(data, actions));
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}
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// mount view
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if (opts.view && mount) {
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dispatch(data, actions);
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}
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return {state}
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} |