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interfaces that describe their intentions.

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/* eslint complexity: "OFF" */ var MethodChain = require('./MethodChain') var ChainedMapBase = require('./ChainedMapBase') var dopemerge = require('./deps/dopemerge') var isFunction = require('./deps/is/function') var isUndefined = require('./deps/is/undefined') var isTrue = require('./deps/is/true') var isMapish = require('./deps/is/mapish') var ObjectKeys = require('./deps/util/keys') var constructInit = require('./deps/fp/constructInit') var EMPTY_OBJ = require('./deps/native/EMPTY_OBJ') var SHORTHANDS_KEY = require('./deps/meta/SHORTHANDS_KEY') var ENV_DEVELOPMENT = require('./deps/env/dev') var ENV_DEBUG = require('./deps/env/debug') var ON_EXISTING_KEY = 'onExisting' var ON_VALUE_KEY = 'onValue' var MERGER_KEY = 'merger' var MERGER_OPTIONS_KEY = 'opts' var OBJ_KEY = 'obj' /** * @since 1.0.0 * @type {Map} * @extends {ChainedMapBase} * @member MergeChain * @memberOf Chainable * * @types MergeChain * @tests MergeChain * @see deps/dopemerge * * {@link https://sourcemaking.com/design_patterns/visitor visitor-pattern} * * @TODO consider just making this a function, * because 80/20 onValue merger & onExisting * are rarely used & are easily overridable with .merge */ var MergeChain = (function (ChainedMapBase) { function MergeChain(parent) { ChainedMapBase.call(this, parent) /* prettier-ignore */ this .extend([ON_EXISTING_KEY, ON_VALUE_KEY, OBJ_KEY]) .set(ON_VALUE_KEY, function () { return true; }) .set(MERGER_KEY, dopemerge) } if ( ChainedMapBase ) MergeChain.__proto__ = ChainedMapBase; MergeChain.prototype = Object.create( ChainedMapBase && ChainedMapBase.prototype ); MergeChain.prototype.constructor = MergeChain; /** * @desc options for merging with dopemerge * @modifies this.merger | this.opts * * @memberOf MergeChain * @since 1.0.2 * @param {Object | Function} opts when object: options for the merger. when function: is the merger * @return {MergeChain} @chainable * @see dopemerge * * @example * { * stringToArray: true, * boolToArray: false, * boolAsRight: true, * ignoreTypes: ['null', 'undefined', 'NaN'], * debug: false, * } * * @example * .merger(require('lodash.mergewith')()) */ MergeChain.prototype.merger = function merger (opts) { if (isFunction(opts)) { return this.set(MERGER_KEY, opts) } else { return this.set(MERGER_OPTIONS_KEY, opts) } }; // [v] messes comments on conditional brace style /* prettier-ignore */ /** * @desc merges object in, goes through all keys, checks cbs, dopemerges * * @since 1.0.0 * * @param {Object} [obj2=undefined] object to merge in, defaults to this.get('obj') * @return {MergeChain} @chainable * * @see ChainedMap * @TODO issue here if we extend without shorthands & * we want to merge existing values... :s * * * @example * * const chain = new Chain() * chain.merge({canada: {eh: true}}) * chain.merge({canada: {arr: [0, {'1': 2}], eh: {again: true}}}) * chain.entries() * //=> {canada:{ eh: {again: true}, arr: [0, {'1': 2}] }} * */ MergeChain.prototype.merge = function merge (obj2) { var this$1 = this; // better uglifying var parent = this.parent var get = function (key) { return this$1.get(key); } var onExisting = get(ON_EXISTING_KEY) var onValue = get(ON_VALUE_KEY) var opts = get(MERGER_OPTIONS_KEY) var obj = obj2 || get(OBJ_KEY) var merger = get(MERGER_KEY) var shorthands = parent.meta ? parent.meta(SHORTHANDS_KEY) : EMPTY_OBJ var keys = ObjectKeys(obj) // @@debugger /* istanbul ignore next: devs */ if (ENV_DEVELOPMENT) { if (!obj) { console.log({onExisting: onExisting, opts: opts, obj: obj, merger: merger, shorthands: shorthands, keys: keys, parent: parent}) throw new Error('must provide an object to merge') } } /** * @private * * since this would be slower * if I want to not have a speedy default when using .onExisting * should @note to use .extend * when using chains without a class & doing .merge (edge-case) * * @param {Primitive} key key (shorthands[key] or just key) * @param {*} value obj[key] * @return {void} * * @TODO could use .eq here * @TODO if (isMapish(obj)) obj = obj.entries() * * @example * var obj = {key: 1} * * MergeChain.init(obj).merge({key: ['value']}) * * // goes to this internal scoped function * handleExisting('key', ['value']) * // if there is .onValue or .onExisting, use them, default deepmerge * * obj * //=> {key: [1, 'value']} * */ var handleExisting = function (key, value) { /** * @desc when fn is a full method, not an extended shorthand * @since 0.5.0 * * @param {Primitive} keyToSet key we chose to set * @param {*} valueToSet value we chose to set (merged, existing, new) * @return {Parent | Chain | *} .set or [keyToSet] return * * @example * * MergeChain.init(new Chain().extend(['eh'])) * * //isFunction: true => call parent[keyToSet](valueToSet) * setChosen('eh', 1) * //=> parent * parent.get('eh') * //=> 1 * * //=>isFunction: false => parent.set(keyToSet, valueToSet) * setChosen('oh', 1) * //=> parent //<- unless .set is overriden * parent.get('oh') * //=> 1 * */ var setChosen = function (keyToSet, valueToSet) { return (isFunction(parent[key]) ? parent[keyToSet](valueToSet) : parent.set(keyToSet, valueToSet)); } /** * check if it's shorthanded * -> check if it has a value already */ if (isTrue(parent.has(key))) { // get that value var existing = parent.get(key) /** * if we have onExisting, call it * else default to dopemerge */ if (isUndefined(onExisting)) { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log( 'parent has: no onExisting', {existing: existing, [key]: value} ) } setChosen(key, merger(existing, value, opts)) } else { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log( 'parent has: has onExisting', {existing: existing, onExisting: onExisting, [key]: value} ) } /** * maybe we should not even have `.onExisting` * since we can just override merge method... * and then client can just use a custom merger... * * could add and remove subscriber but that's overhead and * tricky here, because if we set a value that was just set... */ setChosen(key, onExisting(existing, value, opts)) } } else { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log('parent does not have', {[key]: value}) } setChosen(key, value) } } for (var k = 0, len = keys.length; k < len; k++) { // key to the current property in the data being merged var key = keys[k] // we have our value, no we can change the key if needed for shorthands var value = obj[key] // @NOTE: when shorthands is an object, key is the method it should call if (!isUndefined(shorthands[key]) && shorthands[key] !== key) { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log( 'had a shorthand with a diff key than the object (likely @alias)', {shorthandMethod: shorthands[key], key: key, value: value} ) } key = shorthands[key] } // method for the key var method = parent[key] /* istanbul ignore next: sourcemaps trigger istanbul here incorrectly */ // use onValue when set if (!onValue(value, key, this$1)) { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log('had onValue, was false, ignored', {onValue: onValue, key: key, value: value}) } continue } // when property itself is a Chainable else if (isMapish(method)) { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log('has method or shorthand') } parent[key].merge(value) } // we have a method or shorthand else if (method) { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log('has method or shorthand', {method: method, key: key, value: value}) } handleExisting(key, value) } // default to .set on the store else { /* istanbul ignore next: devs */ if (ENV_DEBUG) { console.log('went to default', {method: method, key: key, value: value}) } parent.set(key, value) } } return parent }; return MergeChain; }(ChainedMapBase)); constructInit(MergeChain) /** * @memberOf MergeChain * @method onExisting * @since 0.9.0 * @example * * const {Chain, MergeChain} = require('chain-able') * * const chain = new Chain().set('str', 'stringy') * * MergeChain.init(chain) * .onExisting((a, b) => a + b) * .merge({str: '+'}) * * chain.get('str') * //=> 'stringy+' * */ module.exports = MergeChain // @TODO re-enable this later // module.exports = new MethodChain(MergeChain.prototype) // .methods(['onExisting', 'onValue', 'obj']) // .build(MergeChain) //# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"MergeChain.js","sources":["MergeChain.js"],"sourcesContent":["/* eslint complexity: \"OFF\" */\nconst MethodChain = require('./MethodChain')\nconst ChainedMapBase = require('./ChainedMapBase')\nconst dopemerge = require('./deps/dopemerge')\nconst isFunction = require('./deps/is/function')\nconst isUndefined = require('./deps/is/undefined')\nconst isTrue = require('./deps/is/true')\nconst isMapish = require('./deps/is/mapish')\nconst ObjectKeys = require('./deps/util/keys')\nconst constructInit = require('./deps/fp/constructInit')\nconst EMPTY_OBJ = require('./deps/native/EMPTY_OBJ')\nconst SHORTHANDS_KEY = require('./deps/meta/SHORTHANDS_KEY')\nconst ENV_DEVELOPMENT = require('./deps/env/dev')\nconst ENV_DEBUG = require('./deps/env/debug')\n\nconst ON_EXISTING_KEY = 'onExisting'\nconst ON_VALUE_KEY = 'onValue'\nconst MERGER_KEY = 'merger'\nconst MERGER_OPTIONS_KEY = 'opts'\nconst OBJ_KEY = 'obj'\n\n/**\n * @since 1.0.0\n * @type {Map}\n * @extends {ChainedMapBase}\n * @member MergeChain\n * @memberOf Chainable\n *\n * @types MergeChain\n * @tests MergeChain\n * @see deps/dopemerge\n *\n * {@link https://sourcemaking.com/design_patterns/visitor visitor-pattern}\n *\n * @TODO consider just making this a function,\n *       because 80/20 onValue merger & onExisting\n *       are rarely used & are easily overridable with .merge\n */\nclass MergeChain extends ChainedMapBase {\n  /**\n   * @static\n   * @param  {Chainable | ParentType} parent ParentType required, for merging\n   * @return {MergeChain} @chainable\n   *\n   * @example\n   *\n   *    let map = new Map()\n   *    map.set('eh', 1)\n   *    map.set('coo', 'oo')\n   *\n   *    MergeChain.init(map).merge({eh: 2})\n   *    console.dir(map)\n   *    //=> Map { 'eh' => 2, 'coo' => 'oo' }\n   *\n   */\n  // static init(parent) {\n  //   return new MergeChain(parent)\n  // }\n\n  /**\n   * @inheritdoc\n   */\n  constructor(parent) {\n    super(parent)\n\n    /* prettier-ignore */\n    this\n      .extend([ON_EXISTING_KEY, ON_VALUE_KEY, OBJ_KEY])\n      .set(ON_VALUE_KEY, () => true)\n      .set(MERGER_KEY, dopemerge)\n  }\n\n  /**\n   * @desc options for merging with dopemerge\n   *       @modifies this.merger | this.opts\n   *\n   * @memberOf MergeChain\n   * @since 1.0.2\n   * @param  {Object | Function} opts when object: options for the merger. when function: is the merger\n   * @return {MergeChain} @chainable\n   * @see dopemerge\n   *\n   * @example\n   *   {\n   *     stringToArray: true,\n   *     boolToArray: false,\n   *     boolAsRight: true,\n   *     ignoreTypes: ['null', 'undefined', 'NaN'],\n   *     debug: false,\n   *   }\n   *\n   * @example\n   *    .merger(require('lodash.mergewith')())\n   */\n  merger(opts) {\n    if (isFunction(opts)) return this.set(MERGER_KEY, opts)\n    else return this.set(MERGER_OPTIONS_KEY, opts)\n  }\n\n  // [v] messes comments on conditional brace style\n  /* prettier-ignore */\n  /**\n   * @desc merges object in, goes through all keys, checks cbs, dopemerges\n   *\n   * @since 1.0.0\n   *\n   * @param  {Object} [obj2=undefined] object to merge in, defaults to this.get('obj')\n   * @return {MergeChain} @chainable\n   *\n   * @see ChainedMap\n   * @TODO issue here if we extend without shorthands &\n   *       we want to merge existing values... :s\n   *\n   *\n   * @example\n   *\n   *  const chain = new Chain()\n   *  chain.merge({canada: {eh: true}})\n   *  chain.merge({canada: {arr: [0, {'1': 2}], eh: {again: true}}})\n   *  chain.entries()\n   *  //=> {canada:{ eh: {again: true}, arr: [0, {'1': 2}] }}\n   *\n   */\n  merge(obj2) {\n    // better uglifying\n    const parent = this.parent\n    const get = key => this.get(key)\n\n    const onExisting = get(ON_EXISTING_KEY)\n    const onValue = get(ON_VALUE_KEY)\n    const opts = get(MERGER_OPTIONS_KEY)\n    const obj = obj2 || get(OBJ_KEY)\n    const merger = get(MERGER_KEY)\n    const shorthands = parent.meta ? parent.meta(SHORTHANDS_KEY) : EMPTY_OBJ\n    const keys = ObjectKeys(obj)\n\n    // @@debugger\n\n    /* istanbul ignore next: devs */\n    if (ENV_DEVELOPMENT) {\n      if (!obj) {\n        console.log({onExisting, opts, obj, merger, shorthands, keys, parent})\n        throw new Error('must provide an object to merge')\n      }\n    }\n\n    /**\n     * @private\n     *\n     * since this would be slower\n     * if I want to not have a speedy default when using .onExisting\n     * should @note to use .extend\n     * when using chains without a class & doing .merge (edge-case)\n     *\n     * @param  {Primitive} key key (shorthands[key] or just key)\n     * @param  {*} value obj[key]\n     * @return {void}\n     *\n     * @TODO could use .eq here\n     * @TODO if (isMapish(obj)) obj = obj.entries()\n     *\n     * @example\n     *  var obj = {key: 1}\n     *\n     *  MergeChain.init(obj).merge({key: ['value']})\n     *\n     *  // goes to this internal scoped function\n     *  handleExisting('key', ['value'])\n     *  // if there is .onValue or .onExisting, use them, default deepmerge\n     *\n     *  obj\n     *  //=> {key: [1, 'value']}\n     *\n     */\n    const handleExisting = (key, value) => {\n      /**\n       * @desc when fn is a full method, not an extended shorthand\n       * @since 0.5.0\n       *\n       * @param {Primitive} keyToSet key we chose to set\n       * @param {*} valueToSet value we chose to set (merged, existing, new)\n       * @return {Parent | Chain | *} .set or [keyToSet] return\n       *\n       * @example\n       *\n       *    MergeChain.init(new Chain().extend(['eh']))\n       *\n       *    //isFunction: true => call parent[keyToSet](valueToSet)\n       *    setChosen('eh', 1)\n       *    //=> parent\n       *    parent.get('eh')\n       *    //=> 1\n       *\n       *    //=>isFunction: false => parent.set(keyToSet, valueToSet)\n       *    setChosen('oh', 1)\n       *    //=> parent //<- unless .set is overriden\n       *    parent.get('oh')\n       *    //=> 1\n       *\n       */\n      const setChosen = (keyToSet, valueToSet) =>\n        (isFunction(parent[key])\n          ? parent[keyToSet](valueToSet)\n          : parent.set(keyToSet, valueToSet))\n\n      /**\n       * check if it's shorthanded\n       * -> check if it has a value already\n       */\n      if (isTrue(parent.has(key))) {\n        // get that value\n        const existing = parent.get(key)\n\n        /**\n         * if we have onExisting, call it\n         * else default to dopemerge\n         */\n        if (isUndefined(onExisting)) {\n          /* istanbul ignore next: devs */\n          if (ENV_DEBUG) {\n            console.log(\n              'parent has: no onExisting',\n              {existing, [key]: value}\n            )\n          }\n          setChosen(key, merger(existing, value, opts))\n        }\n        else {\n          /* istanbul ignore next: devs */\n          if (ENV_DEBUG) {\n            console.log(\n              'parent has: has onExisting',\n              {existing, onExisting, [key]: value}\n            )\n          }\n\n          /**\n           * maybe we should not even have `.onExisting`\n           * since we can just override merge method...\n           * and then client can just use a custom merger...\n           *\n           * could add and remove subscriber but that's overhead and\n           * tricky here, because if we set a value that was just set...\n           */\n          setChosen(key, onExisting(existing, value, opts))\n        }\n      }\n      else {\n        /* istanbul ignore next: devs */\n        if (ENV_DEBUG) {\n          console.log('parent does not have', {[key]: value})\n        }\n        setChosen(key, value)\n      }\n    }\n\n    for (let k = 0, len = keys.length; k < len; k++) {\n      // key to the current property in the data being merged\n      let key = keys[k]\n\n      // we have our value, no we can change the key if needed for shorthands\n      const value = obj[key]\n\n      // @NOTE: when shorthands is an object, key is the method it should call\n      if (!isUndefined(shorthands[key]) && shorthands[key] !== key) {\n        /* istanbul ignore next: devs */\n        if (ENV_DEBUG) {\n          console.log(\n            'had a shorthand with a diff key than the object (likely @alias)',\n            {shorthandMethod: shorthands[key], key, value}\n          )\n        }\n        key = shorthands[key]\n      }\n\n      // method for the key\n      const method = parent[key]\n\n      /* istanbul ignore next: sourcemaps trigger istanbul here incorrectly */\n      // use onValue when set\n      if (!onValue(value, key, this)) {\n        /* istanbul ignore next: devs */\n        if (ENV_DEBUG) {\n          console.log('had onValue, was false, ignored', {onValue, key, value})\n        }\n        continue\n      }\n      // when property itself is a Chainable\n      else if (isMapish(method)) {\n        /* istanbul ignore next: devs */\n        if (ENV_DEBUG) {\n          console.log('has method or shorthand')\n        }\n        parent[key].merge(value)\n      }\n      // we have a method or shorthand\n      else if (method) {\n        /* istanbul ignore next: devs */\n        if (ENV_DEBUG) {\n          console.log('has method or shorthand', {method, key, value})\n        }\n        handleExisting(key, value)\n      }\n      // default to .set on the store\n      else {\n        /* istanbul ignore next: devs */\n        if (ENV_DEBUG) {\n          console.log('went to default', {method, key, value})\n        }\n        parent.set(key, value)\n      }\n    }\n\n    return parent\n  }\n}\n\nconstructInit(MergeChain)\n\n/**\n * @memberOf MergeChain\n * @method onExisting\n * @since 0.9.0\n * @example\n *\n *    const {Chain, MergeChain} = require('chain-able')\n *\n *    const chain = new Chain().set('str', 'stringy')\n *\n *    MergeChain.init(chain)\n *      .onExisting((a, b) => a + b)\n *      .merge({str: '+'})\n *\n *    chain.get('str')\n *    //=> 'stringy+'\n *\n */\n\nmodule.exports = MergeChain\n\n// @TODO re-enable this later\n// module.exports = new MethodChain(MergeChain.prototype)\n//   .methods(['onExisting', 'onValue', 'obj'])\n//   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