implemented frontend including separate message system; started to implement backend

yjs-poll/node_modules/lib0/object.js

@@ -0,0 +1,169 @@
+import * as equalityTrait from './trait/equality.js'
+
+/**
+ * Utility functions for working with EcmaScript objects.
+ *
+ * @module object
+ */
+
+/**
+ * @return {Object<string,any>} obj
+ */
+export const create = () => Object.create(null)
+
+/**
+ * @param {any} o
+ * @return {o is { [k:string]:any }}
+ */
+export const isObject = o => typeof o === 'object'
+
+/**
+ * Object.assign
+ */
+export const assign = Object.assign
+
+/**
+ * @param {Object<string,any>} obj
+ */
+export const keys = Object.keys
+
+/**
+ * @template V
+ * @param {{[key:string]: V}} obj
+ * @return {Array<V>}
+ */
+export const values = Object.values
+
+/**
+ * @template V
+ * @param {{[k:string]:V}} obj
+ * @param {function(V,string):any} f
+ */
+export const forEach = (obj, f) => {
+  for (const key in obj) {
+    f(obj[key], key)
+  }
+}
+
+/**
+ * @todo implement mapToArray & map
+ *
+ * @template R
+ * @param {Object<string,any>} obj
+ * @param {function(any,string):R} f
+ * @return {Array<R>}
+ */
+export const map = (obj, f) => {
+  const results = []
+  for (const key in obj) {
+    results.push(f(obj[key], key))
+  }
+  return results
+}
+
+/**
+ * @deprecated use object.size instead
+ * @param {Object<string,any>} obj
+ * @return {number}
+ */
+export const length = obj => keys(obj).length
+
+/**
+ * @param {Object<string,any>} obj
+ * @return {number}
+ */
+export const size = obj => keys(obj).length
+
+/**
+ * @template {{ [key:string|number|symbol]: any }} T
+ * @param {T} obj
+ * @param {(v:T[keyof T],k:keyof T)=>boolean} f
+ * @return {boolean}
+ */
+export const some = (obj, f) => {
+  for (const key in obj) {
+    if (f(obj[key], key)) {
+      return true
+    }
+  }
+  return false
+}
+
+/**
+ * @param {Object|null|undefined} obj
+ */
+export const isEmpty = obj => {
+  // eslint-disable-next-line no-unreachable-loop
+  for (const _k in obj) {
+    return false
+  }
+  return true
+}
+
+/**
+ * @template {{ [key:string|number|symbol]: any }} T
+ * @param {T} obj
+ * @param {(v:T[keyof T],k:keyof T)=>boolean} f
+ * @return {boolean}
+ */
+export const every = (obj, f) => {
+  for (const key in obj) {
+    if (!f(obj[key], key)) {
+      return false
+    }
+  }
+  return true
+}
+
+/**
+ * Calls `Object.prototype.hasOwnProperty`.
+ *
+ * @param {any} obj
+ * @param {string|number|symbol} key
+ * @return {boolean}
+ */
+export const hasProperty = (obj, key) => Object.prototype.hasOwnProperty.call(obj, key)
+
+/**
+ * @param {Object<string,any>} a
+ * @param {Object<string,any>} b
+ * @return {boolean}
+ */
+export const equalFlat = (a, b) => a === b || (size(a) === size(b) && every(a, (val, key) => (val !== undefined || hasProperty(b, key)) && equalityTrait.equals(b[key], val)))
+
+/**
+ * Make an object immutable. This hurts performance and is usually not needed if you perform good
+ * coding practices.
+ */
+export const freeze = Object.freeze
+
+/**
+ * Make an object and all its children immutable.
+ * This *really* hurts performance and is usually not needed if you perform good coding practices.
+ *
+ * @template {any} T
+ * @param {T} o
+ * @return {Readonly<T>}
+ */
+export const deepFreeze = (o) => {
+  for (const key in o) {
+    const c = o[key]
+    if (typeof c === 'object' || typeof c === 'function') {
+      deepFreeze(o[key])
+    }
+  }
+  return freeze(o)
+}
+
+/**
+ * Get object property. Create T if property is undefined and set T on object.
+ *
+ * @function
+ * @template {object} KV
+ * @template {keyof KV} [K=keyof KV]
+ * @param {KV} o
+ * @param {K} key
+ * @param {() => KV[K]} createT
+ * @return {KV[K]}
+ */
+export const setIfUndefined = (o, key, createT) => hasProperty(o, key) ? o[key] : (o[key] = createT())