overmind/lib/utils.js.map

Frictionless state management

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isPlainObject from 'is-plain-obj'\nimport { IMutation, IS_PROXY, VALUE } from 'proxy-state-tree'\nimport { deepCopy } from './statemachine'\n\n// Due to avoid circular dependency warnings we export this utility from here\nexport { deepCopy } from './statemachine'\n\nexport const createOnInitialize = () => {\n  return ({ actions }, instance) => {\n    const initializers = getActionsByName('onInitializeOvermind', actions)\n\n    return Promise.all(initializers.map((initialize) => initialize(instance)))\n  }\n}\n\nexport const ENVIRONMENT = (() => {\n  let env: string\n  try {\n    env = process.env.NODE_ENV!\n  } catch {\n    console.warn(\n      'Overmind was unable to determine the NODE_ENV, which means it will run in DEVELOPMENT mode. If this is a production app, please configure your build tool to define NODE_ENV'\n    )\n    env = 'development'\n  }\n\n  return env\n})()\n\nexport const IS_TEST = ENVIRONMENT === 'test'\nexport const IS_OPERATOR = Symbol('operator')\nexport const ORIGINAL_ACTIONS = Symbol('origina_actions')\nexport const EXECUTION = Symbol('execution')\n\nexport const MODE_DEFAULT = Symbol('MODE_DEFAULT')\nexport const MODE_TEST = Symbol('MODE_TEST')\nexport const MODE_SSR = Symbol('MODE_SSR')\n\nexport class MockedEventEmitter {\n  emit() {}\n  emitAsync() {}\n  on() {}\n  once() {}\n  addListener() {}\n}\n\nexport const json = <T>(obj: T): T => {\n  return deepCopy(obj && obj[IS_PROXY] ? obj[VALUE] : obj)\n}\n\nexport function isPromise(maybePromise: any) {\n  return (\n    maybePromise instanceof Promise ||\n    (maybePromise &&\n      typeof maybePromise.then === 'function' &&\n      typeof maybePromise.catch === 'function')\n  )\n}\n\nexport function processState(state: {}) {\n  return Object.keys(state).reduce(\n    (aggr, key) => {\n      if (key === '__esModule') {\n        return aggr\n      }\n      const originalDescriptor = Object.getOwnPropertyDescriptor(state, key)\n\n      if (originalDescriptor && 'get' in originalDescriptor) {\n        Object.defineProperty(aggr, key, originalDescriptor as any)\n\n        return aggr\n      }\n\n      const value = state[key]\n\n      if (isPlainObject(value)) {\n        aggr[key] = processState(value)\n      } else {\n        Object.defineProperty(aggr, key, originalDescriptor as any)\n      }\n\n      return aggr\n    },\n    isPlainObject(state) ? {} : state\n  )\n}\n\nexport function getFunctionName(func: Function) {\n  return func.name || (func as any).displayName || ''\n}\n\nconst getChangeMutationsDelimiter = '.'\nexport function getChangeMutations(\n  stateA: object,\n  stateB: object,\n  path: string[] = [],\n  mutations: IMutation[] = []\n): IMutation[] {\n  const stateAKeys = Object.keys(stateA)\n  const stateBKeys = Object.keys(stateB)\n\n  stateAKeys.forEach((key) => {\n    if (!stateBKeys.includes(key)) {\n      mutations.push({\n        delimiter: getChangeMutationsDelimiter,\n        args: [],\n        path: path.concat(key).join('.'),\n        hasChangedValue: false,\n        method: 'unset',\n      })\n    }\n  })\n\n  stateBKeys.forEach((key) => {\n    if (isPlainObject(stateA[key]) && isPlainObject(stateB[key])) {\n      getChangeMutations(stateA[key], stateB[key], path.concat(key), mutations)\n    } else if (stateA[key] !== stateB[key]) {\n      mutations.push({\n        delimiter: getChangeMutationsDelimiter,\n        args: [stateB[key]],\n        path: path.concat(key).join('.'),\n        hasChangedValue: false,\n        method: 'set',\n      })\n    }\n  })\n\n  return mutations\n}\n\nexport function getActionsByName(\n  name: string,\n  actions = {},\n  currentPath: string[] = []\n) {\n  return Object.keys(actions).reduce<string[]>((aggr, key) => {\n    if (typeof actions[key] === 'function' && key === name) {\n      return aggr.concat(actions[key])\n    }\n\n    return aggr.concat(\n      getActionsByName(name, actions[key], currentPath.concat(key))\n    )\n  }, [])\n}\n\nexport function getActionPaths(actions = {}, currentPath: string[] = []) {\n  return Object.keys(actions).reduce<string[]>((aggr, key) => {\n    if (typeof actions[key] === 'function') {\n      return aggr.concat(currentPath.concat(key).join('.'))\n    }\n\n    return aggr.concat(getActionPaths(actions[key], currentPath.concat(key)))\n  }, [])\n}\n\nexport function createActionsProxy(actions, cb) {\n  return new Proxy(actions, {\n    get(target, prop) {\n      if (prop === ORIGINAL_ACTIONS) {\n        return actions\n      }\n\n      if (typeof target[prop] === 'function') {\n        return cb(target[prop])\n      }\n\n      if (!target[prop]) {\n        return undefined\n      }\n\n      return createActionsProxy(target[prop], cb)\n    },\n  })\n}\n"]}