foop
Version:
interfaces that describe their intentions.
203 lines (185 loc) • 16.2 kB
JavaScript
var toarr = require('../deps/to-arr')
var traverse = require('../deps/traverse')
var match = require('../deps/matcher')
var getPathSegments = require('../deps/dot/segments')
var dotSet = require('../deps/dot/set')
var newMap = require('../deps/construct/map')
var OBSERVERS_KEY = require('../deps/meta/OBSERVERS_KEY')
var ENV_DEBUG = require('../deps/env/debug')
// @TODO export better, this adds extra size
var eq = traverse.eq;
var clone = traverse.clone;
/**
* @TODO auto-clear when near full, have cache-class with pooling
* @desc scoped clones
* @private
* @type {Map}
*/
var objs = new Map()
/**
* @desc > subscribe to changes
* ❗ called only on **change**
* observers are only called when data they subscribe to changes
*
* @since 3.0.1
* @class Observe
* @member Observe
* @extends {ChainedMap}
* @extends {DotProp}
* @memberOf compose
* @category Chainable
*
* @param {Class | Composable} Target composable class
* @return {Observe} class
*
* @tests Observe
* @types Observe
*
* @see ChainedMap
* @see DotProp
* @see deps/matcher
* @see deps/traversers/eq
* @see deps/traverse
* @see DotProp
*
* {@link https://msdn.microsoft.com/en-us/library/dd456845(v=vs.110).aspx microsoft}
* {@link https://github.com/Hypercubed/ hypercubed}
* {@link http://eliperelman.com/fn.js/ fn-is}
* {@link https://github.com/knockout/knockout/blob/master/src/subscribables/observable.js knockoutjs-observable}
* {@link https://www.npmjs.com/package/simple-observable simple-observable}
* {@link https://github.com/canjs/can-observation can-js-observation}
* [ minimal OR simple OR microjs OR tiny observable ]
*
* {@link https://github.com/iluwatar/java-design-patterns/tree/master/observer observer-pattern}
* {@link https://github.com/ReactiveX/rxjs/blob/master/src/Subscriber.ts reactivex}
* {@link https://github.com/sindresorhus/awesome-observables awesome-observables}
* {@link https://medium.com/@benlesh/learning-observable-by-building-observable-d5da57405d87 building-observables}
* {@link https://github.com/addyosmani/essential-js-design-patterns/blob/master/diagrams/observer.png js-observer-png}
* {@link https://github.com/addyosmani/essential-js-design-patterns/blob/master/diagrams/publishsubscribe.png pubsub-png}
* {@link https://github.com/tusharmath/observable-air observable-air}
*
* @see {@link reactivex}
* @see {@link awesome-observables}
* @see {@link building-observables}
* @see {@link observer-pattern}
* @see {@link observable-air}
*
* @example
*
* const {compose} = require('chain-able')
* const {DotProp} = compose
* new DotProp()
* //=> DotProp
*
*/
module.exports = function (Target) {
// return class Observe extends Target {
/**
* @desc observe properties when they change
*
* @method
* @memberOf Observe
* @since 4.0.0 <- refactored with dot-prop
* @since 1.0.0
*
* @param {Matchable} properties Matchable properties to observe
* @param {Function} fn onChanged
* @return {Target} @chainable
*
* @see traversers/eq
* @see toarr
* @see matcher
*
* {@link https://jsfiddle.net/wqxuags2/28/ for a Demo Clock with observable}
*
* @see {@link for a Demo Clock with observable}
* @see examples/playground/TodoStore
*
* @TODO gotta update `data` if `deleting` too...
* @TODO un-observe
* @TODO should hash these callback properties
* @TODO just throttle the `.set` to allow easier version of .commit
*
* @example
*
* const Target = require('chain-able')
*
* const chain = new Target()
* const log = arg => console.log(arg)
*
* chain
* .extend(['eh'])
* .observe('eh', data => log(data))
* .eh(true)
* //=> {eh: true}
*
* @example
*
* chain
* .extend(['canada', 'timbuck'])
* .observe(['canad*'], data => console.log(data.canada))
* .canada(true)
* .canada(true)
* .timbuck(false)
*
* //=> true
* //=> false
*
* // only called when changed,
* // otherwise it would be 2 `true` & 1 `false`
*
*/
Target.prototype.observe = function chainObserve(properties, fn) {
var this$1 = this;
if (ENV_DEBUG) {
console.log('observe', {properties: properties, fn: fn})
}
var props = toarr(properties)
var hashKey = props.join('_')
if (ENV_DEBUG) {
console.log('observe', {[hashKey]: props})
}
var data = {}
/* prettier-ignore */
return this.meta(OBSERVERS_KEY, function (changed) {
/**
* match the keys, make the data out of it
*/
var m = match(changed.key, props)
// @@debugger
if (ENV_DEBUG) {
console.log({m: m, key: changed.key, objs: objs, data: data, hashKey: hashKey})
}
// @NOTE faster
if (m.length === 0) { return }
// update data
for (var i = 0; i < m.length; i++) {
var segments = getPathSegments(m[i])
// console.log({segments, m, i, v: m[i]})
dotSet(data, segments, this$1.get(segments))
}
/**
* if we have called it at least once...
* and it has not changed, leave it
* else
* clone it
* call the observer
*/
if (objs.has(hashKey) && eq(objs.get(hashKey), data)) {
// @@debugger
return
}
// @@debugger
/**
* it did change - clone it for next deepEquals check
*/
objs.set(hashKey, clone(data))
/**
* call the observer - it matched & data changed
*/
fn.call(this$1, data, this$1)
})
}
return Target
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"Observe.js","sources":["Observe.js"],"sourcesContent":["const toarr = require('../deps/to-arr')\nconst traverse = require('../deps/traverse')\nconst match = require('../deps/matcher')\nconst getPathSegments = require('../deps/dot/segments')\nconst dotSet = require('../deps/dot/set')\nconst newMap = require('../deps/construct/map')\nconst OBSERVERS_KEY = require('../deps/meta/OBSERVERS_KEY')\nconst ENV_DEBUG = require('../deps/env/debug')\n\n// @TODO export better, this adds extra size\nconst {eq, clone} = traverse\n\n/**\n * @TODO auto-clear when near full, have cache-class with pooling\n * @desc scoped clones\n * @private\n * @type {Map}\n */\nlet objs = new Map()\n\n/**\n * @desc > subscribe to changes\n *       ❗ called only on **change**\n *       observers are only called when data they subscribe to changes\n *\n * @since 3.0.1\n * @class Observe\n * @member Observe\n * @extends {ChainedMap}\n * @extends {DotProp}\n * @memberOf compose\n * @category Chainable\n *\n * @param  {Class | Composable} Target composable class\n * @return {Observe} class\n *\n * @tests Observe\n * @types Observe\n *\n * @see ChainedMap\n * @see DotProp\n * @see deps/matcher\n * @see deps/traversers/eq\n * @see deps/traverse\n * @see DotProp\n *\n * {@link https://msdn.microsoft.com/en-us/library/dd456845(v=vs.110).aspx microsoft}\n * {@link https://github.com/Hypercubed/ hypercubed}\n * {@link http://eliperelman.com/fn.js/ fn-is}\n * {@link https://github.com/knockout/knockout/blob/master/src/subscribables/observable.js knockoutjs-observable}\n * {@link https://www.npmjs.com/package/simple-observable simple-observable}\n * {@link https://github.com/canjs/can-observation can-js-observation}\n * [ minimal OR simple OR microjs OR tiny observable ]\n *\n * {@link https://github.com/iluwatar/java-design-patterns/tree/master/observer observer-pattern}\n * {@link https://github.com/ReactiveX/rxjs/blob/master/src/Subscriber.ts reactivex}\n * {@link https://github.com/sindresorhus/awesome-observables awesome-observables}\n * {@link https://medium.com/@benlesh/learning-observable-by-building-observable-d5da57405d87 building-observables}\n * {@link https://github.com/addyosmani/essential-js-design-patterns/blob/master/diagrams/observer.png js-observer-png}\n * {@link https://github.com/addyosmani/essential-js-design-patterns/blob/master/diagrams/publishsubscribe.png pubsub-png}\n * {@link https://github.com/tusharmath/observable-air observable-air}\n *\n * @see {@link reactivex}\n * @see {@link awesome-observables}\n * @see {@link building-observables}\n * @see {@link observer-pattern}\n * @see {@link observable-air}\n *\n * @example\n *\n *    const {compose} = require('chain-able')\n *    const {DotProp} = compose\n *    new DotProp()\n *    //=> DotProp\n *\n */\nmodule.exports = Target => {\n  // return class Observe extends Target {\n  /**\n   * @desc observe properties when they change\n   *\n   * @method\n   * @memberOf Observe\n   * @since 4.0.0 <- refactored with dot-prop\n   * @since 1.0.0\n   *\n   * @param  {Matchable} properties Matchable properties to observe\n   * @param  {Function} fn onChanged\n   * @return {Target} @chainable\n   *\n   * @see traversers/eq\n   * @see toarr\n   * @see matcher\n   *\n   * {@link https://jsfiddle.net/wqxuags2/28/ for a Demo Clock with observable}\n   *\n   * @see {@link for a Demo Clock with observable}\n   * @see examples/playground/TodoStore\n   *\n   * @TODO gotta update `data` if `deleting` too...\n   * @TODO un-observe\n   * @TODO should hash these callback properties\n   * @TODO just throttle the `.set` to allow easier version of .commit\n   *\n   * @example\n   *\n   *   const Target = require('chain-able')\n   *\n   *   const chain = new Target()\n   *   const log = arg => console.log(arg)\n   *\n   *   chain\n   *     .extend(['eh'])\n   *     .observe('eh', data => log(data))\n   *     .eh(true)\n   *   //=> {eh: true}\n   *\n   * @example\n   *\n   *    chain\n   *      .extend(['canada', 'timbuck'])\n   *      .observe(['canad*'], data => console.log(data.canada))\n   *      .canada(true)\n   *      .canada(true)\n   *      .timbuck(false)\n   *\n   *    //=> true\n   *    //=> false\n   *\n   *    // only called when changed,\n   *    // otherwise it would be 2 `true` & 1 `false`\n   *\n   */\n  Target.prototype.observe = function chainObserve(properties, fn) {\n    if (ENV_DEBUG) {\n      console.log('observe', {properties, fn})\n    }\n\n    const props = toarr(properties)\n    const hashKey = props.join('_')\n\n    if (ENV_DEBUG) {\n      console.log('observe', {[hashKey]: props})\n    }\n\n    let data = {}\n\n    /* prettier-ignore */\n    return this.meta(OBSERVERS_KEY, changed => {\n      /**\n       * match the keys, make the data out of it\n       */\n      const m = match(changed.key, props)\n\n      // @@debugger\n\n      if (ENV_DEBUG) {\n        console.log({m, key: changed.key, objs, data, hashKey})\n      }\n\n      // @NOTE faster\n      if (m.length === 0) return\n\n      // update data\n      for (let i = 0; i < m.length; i++) {\n        const segments = getPathSegments(m[i])\n        // console.log({segments, m, i, v: m[i]})\n        dotSet(data, segments, this.get(segments))\n      }\n\n      /**\n       * if we have called it at least once...\n       *    and it has not changed, leave it\n       * else\n       *    clone it\n       *    call the observer\n       */\n      if (objs.has(hashKey) && eq(objs.get(hashKey), data)) {\n        // @@debugger\n        return\n      }\n\n      // @@debugger\n\n      /**\n       * it did change - clone it for next deepEquals check\n       */\n      objs.set(hashKey, clone(data))\n\n      /**\n       * call the observer - it matched & data changed\n       */\n      fn.call(this, data, this)\n    })\n  }\n\n  return 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