@tangential/core
Version:
Core types and support code for Tangential
157 lines • 17.2 kB
JavaScript
export const ResolveVoid = undefined;
export class ObjectUtil {
/**
* Null safe version of Object.keys.
* @param map
* @returns {string[]} The keys for the map, or an empty array if the argument provided is falsy.
*/
static keys(map) {
return Object.keys(map || {});
}
/**
* Provide a map of keys such that 'map[key]' provides a literal true value if the key is present, even if the value
* on the source map is falsy.
*/
static toTruthMap(ary) {
const map = {};
ary.forEach(value => map[value] = true);
return map;
}
/**
* Expand the map into an array of key-value pairs.
* @param {ObjMap<T extends object>} map
* @returns MapEntry<T>
*/
static entries(map) {
const ret = Object.keys(map || {}).map((key) => {
return { key: key, value: map[key] };
});
return ret;
}
/**
* Provide the values of the map.
* @param {ObjMap<T>} map
* @returns MapEntry<T>
*/
static values(map) {
return Object.keys(map || {}).map((key) => {
return map[key];
});
}
static isObject(value) {
return (typeof value === 'object' || value.constructor === Object);
}
static isFunction(value) {
return (typeof value === 'function' || value instanceof Function);
}
static isNullOrDefined(value) {
return value === null || value === undefined;
}
static exists(value) {
return value !== null && value !== undefined;
}
static assignDeep(target, ...sources) {
target = target || {};
const L = sources.length;
for (let i = 0; i < L; i++) {
const source = sources[i] || {};
Object.keys(source).forEach(key => {
const value = source[key];
if (value && ObjectUtil.isObject(value)) {
target[key] = ObjectUtil.assignDeep({}, target[key] || {}, value);
}
else {
target[key] = value;
}
});
}
return target;
}
static removeNullish(obj) {
const cleanObj = {};
Object.keys(obj).forEach((key) => {
const v = obj[key];
if (v !== null && v !== undefined) {
cleanObj[key] = v;
}
});
return cleanObj;
}
}
export const cleanFirebaseMap = function (firebaseList, deep) {
const result = {};
Object.keys(firebaseList).forEach((key) => {
if (key[0] !== '$') {
if (deep && firebaseList[key] instanceof Object) {
result[key] = cleanFirebaseMap(firebaseList[key], true);
}
else {
result[key] = firebaseList[key];
}
}
});
return result;
};
export const pathExists = (object, path) => {
const parts = path.split('\.');
let exists = true;
let obj = object;
for (let i = 0; i < parts.length; i++) {
obj = obj[parts[i]];
if (obj === undefined) {
exists = false;
break;
}
}
return exists;
};
export const ensureExists = (object, path, value = true) => {
const parts = path.split('\.');
let obj = object;
for (let i = 0; i < parts.length - 1; i++) {
const key = parts[i];
if (obj[key] === undefined) {
obj[key] = {};
}
obj = obj[key];
}
const lastKey = parts[parts.length - 1];
if (obj[lastKey] === undefined) {
obj[lastKey] = value;
}
return obj[lastKey];
};
export const removeIfExists = (object, path) => {
const parts = path.split('\.');
let obj = object;
let existed = true;
for (let i = 0; i < parts.length - 1; i++) {
obj = obj[parts[i]];
if (obj === undefined) {
existed = false;
break;
}
}
if (existed) {
const lastKey = parts[parts.length - 1];
existed = obj[lastKey] !== undefined;
if (existed) {
delete obj[lastKey];
}
}
return existed;
};
export const safe = (fn) => {
try {
return fn();
}
catch (e) {
return null;
}
};
export const eachKey = (objMap, fn) => {
Object.keys(objMap).forEach((key) => {
fn(objMap[key], key);
});
};
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"import {ObjMap} from '../lang/obj-map'\n\n\nexport interface MapEntry<T> { key: string, value: T\n}\n\nexport const ResolveVoid = undefined\n\nexport class ObjectUtil {\n\n\n  /**\n   * Null safe version of Object.keys.\n   * @param map\n   * @returns {string[]} The keys for the map, or an empty array if the argument provided is falsy.\n   */\n  static keys<T>(map: ObjMap<T>): string[] {\n    return Object.keys(map || {})\n  }\n\n  /**\n   * Provide a map of keys such that 'map[key]' provides a literal true value if the key is present, even if the value\n   * on the source map is falsy.\n   */\n  static toTruthMap(ary: string[]): ObjMap<boolean> {\n    const map = {}\n    ary.forEach(value => (map as any)[value] = true)\n    return map\n  }\n\n  /**\n   * Expand the map into an array of key-value pairs.\n   * @param {ObjMap<T extends object>} map\n   * @returns MapEntry<T>\n   */\n  static entries<T>(map: ObjMap<T> | any): MapEntry<T>[] {\n    const ret:MapEntry<T>[] =  Object.keys(map || {}).map((key) => {\n      return {key: key, value: map[key]}\n    })\n    return ret\n  }\n\n  /**\n   * Provide the values of the map.\n   * @param {ObjMap<T>} map\n   * @returns MapEntry<T>\n   */\n  static values<T>(map: ObjMap<T> | any): T[] {\n    return Object.keys(map || {}).map((key) => {\n      return map[key]\n    })\n  }\n\n  static isObject(value:any): boolean {\n    return (typeof value === 'object' || value.constructor === Object)\n  }\n\n  static isFunction(value:any): boolean {\n    return (typeof value === 'function' || value instanceof Function)\n  }\n\n  static isNullOrDefined(value:any): boolean {\n    return value === null || value === undefined\n  }\n\n  static exists(value:any): boolean {\n    return value !== null && value !== undefined\n  }\n\n  static assignDeep(target: any, ...sources: any[]): any {\n    target = target || {}\n    const L = sources.length\n    for (let i = 0; i < L; i++) {\n      const source = sources[i] || {}\n      Object.keys(source).forEach(key => {\n        const value = source[key]\n        if (value && ObjectUtil.isObject(value)) {\n          target[key] = ObjectUtil.assignDeep({}, target[key] || {}, value)\n        } else {\n          target[key] = value\n        }\n      })\n    }\n    return target\n  }\n\n\n  static removeNullish<T>(obj: T): T {\n    const cleanObj: T = <T>{}\n    Object.keys(obj as any).forEach((key) => {\n      const v = (obj as any)[key]\n      if (v !== null && v !== undefined) {\n        (cleanObj as any)[key] = v\n      }\n    })\n    return cleanObj\n  }\n\n}\n\nexport const cleanFirebaseMap = function <T>(firebaseList: ObjMap<T>, deep?: boolean): ObjMap<T> {\n  const result: ObjMap<T> = {}\n\n  Object.keys(firebaseList).forEach((key: string) => {\n    if (key[0] !== '$') {\n      if (deep && firebaseList[key] instanceof Object) {\n        result[key] = <any>cleanFirebaseMap(<any>firebaseList[key], true)\n      } else {\n        result[key] = firebaseList[key]\n      }\n    }\n  })\n  return result\n}\nexport const pathExists = (object: any, path: string): any => {\n  const parts = path.split('\\.')\n  let exists = true\n  let obj = object\n  for (let i = 0; i < parts.length; i++) {\n    obj = obj[parts[i]]\n    if (obj === undefined) {\n      exists = false\n      break\n    }\n  }\n  return exists\n}\n\nexport const ensureExists = (object: any, path: string, value: any = true): any => {\n  const parts = path.split('\\.')\n  let obj = object\n  for (let i = 0; i < parts.length - 1; i++) {\n    const key = parts[i]\n    if (obj[key] === undefined) {\n      obj[key] = {}\n    }\n    obj = obj[key]\n  }\n  const lastKey = parts[parts.length - 1]\n  if (obj[lastKey] === undefined) {\n    obj[lastKey] = value\n  }\n  return obj[lastKey]\n}\n\nexport const removeIfExists = (object: any, path: string): boolean => {\n  const parts = path.split('\\.')\n  let obj = object\n  let existed = true\n  for (let i = 0; i < parts.length - 1; i++) {\n    obj = obj[parts[i]]\n    if (obj === undefined) {\n      existed = false\n      break\n    }\n  }\n  if (existed) {\n    const lastKey = parts[parts.length - 1]\n    existed = obj[lastKey] !== undefined\n    if (existed) {\n      delete obj[lastKey]\n    }\n  }\n  return existed\n}\n\nexport const safe = (fn: () => any) => {\n  try {\n    return fn()\n  } catch (e) {\n    return null\n  }\n}\n\nexport const eachKey = <T extends {}>(objMap: T, fn: (arg?: T, key?: string) => any) => {\n  Object.keys(objMap).forEach((key: string) => {\n    fn((objMap as any)[key], key)\n  })\n}\n\n\nexport interface Duo<X, Y> {\n  x: X\n  y: Y\n}\n"]}