@ortoo/angular-resource
Version:
Magical CRUD resource management for angular
216 lines • 26.2 kB
JavaScript
// tslint:disable max-classes-per-file
import * as jiff from 'jiff';
import * as moment from 'moment';
import { Subject } from 'rxjs/Subject';
import { ObjectUnsubscribedError } from 'rxjs/util/ObjectUnsubscribedError';
import { clone } from 'lodash';
import { isObject } from 'lodash';
import { isString } from 'lodash';
import { map } from 'lodash';
let hiddenKeyRegex = /^\$+/;
let TIMESTAMP_RE = /^(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+)|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d)|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d)$/; // tslint:disable-line max-line-length
export function convertJsonDates(jsonData) {
let outObj;
if (Array.isArray(jsonData)) {
outObj = [];
}
else {
outObj = {};
}
for (let key of Object.keys(jsonData)) {
let val = jsonData[key];
let res = val;
if (isString(val)) {
// The value is a string - does it match any of our things we want to convert
if (TIMESTAMP_RE.test(val)) {
// We're probably a timestamp
let dt = moment(val);
if (dt.isValid()) {
res = dt.toDate();
}
}
}
else if (Array.isArray(val) || isObject(val)) {
res = convertJsonDates(val);
}
outObj[key] = res;
}
return outObj;
}
export function toJSON(obj) {
return JSON.parse(JSON.stringify(obj));
}
export function diff(obj1, obj2) {
obj1 = toJSON(obj1);
obj2 = toJSON(obj2);
return jiff.diff(obj1, obj2);
}
export function applyPatch(res, patch) {
// Go to JSON - don't do anything with dates
let obj = JSON.parse(JSON.stringify(res, toJsonReplacer));
obj = jiff.patch(patch, obj);
// Go back to dates etc
obj = convertJsonDates(obj);
removeResValues(res);
setResValues(res, obj);
}
export function mergeObjects(mine, old, yours) {
// Make copies - we might modify the objects if ids dont exist
mine = clone(mine);
old = clone(old);
// First sort out _id's. We could have a new id if one doesn't exist on mine and old
if (!mine._id && !old._id && yours._id) {
mine._id = yours._id;
old._id = yours._id;
}
// We also need to convert into and out of dates
mine = toJSON(mine);
old = toJSON(old);
yours = toJSON(yours);
let yourpatch = jiff.diff(old, yours);
let mypatch = jiff.diff(old, mine);
let mypaths = map(mypatch, 'path');
let patch = yourpatch.filter((patchval) => {
return mypaths.indexOf(patchval.path) === -1;
});
let patched = jiff.patch(patch, mine);
return convertJsonDates(patched);
}
export function forEachVal(res, cb) {
for (let key in res) {
if (!hiddenKeyRegex.test(key)) {
cb(res, key);
}
}
}
export function toJsonReplacer(key, value) {
let val = value;
if (isString(key) && key.charAt(0) === '$') {
val = undefined;
}
return val;
}
export function fromJsonReviver(_, value) {
let val = value;
if (isString(value) && TIMESTAMP_RE.test(value)) {
let dt = moment(value);
if (dt.isValid()) {
val = dt.toDate();
}
}
return val;
}
export function toObject(res) {
// The toJsonReplacer gets rid of attributes beginning with $ and the fromJsonReviver
// converts date strings back into dates
let str = JSON.stringify(res, toJsonReplacer);
try {
return JSON.parse(str, fromJsonReviver);
}
catch (err) {
// Older versions of IE8 throw 'Out of stack space' errors if we use a reviver function
// due to the bug described here: http://support.microsoft.com/kb/976662. Everyone hates
// IE
if (err.message === 'Out of stack space') {
return convertJsonDates(JSON.parse(str));
}
throw (err);
}
}
export function removeResValues(res) {
forEachVal(res, (_, key) => {
delete res[key];
});
}
export function setResValues(res, vals) {
for (let key of Object.keys(vals)) {
res[key] = vals[key];
}
}
export function persistentStorageKey(url) {
return 'or2ws:' + url;
}
export function advancedStorage(localForage) {
return localForage.driver() !== 'localStorageWrapper';
}
// lifted from here -> http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/2117523#2117523
export function uuid() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
let r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8); // tslint:disable-line
return v.toString(16);
});
}
export class Deferred {
constructor() {
/* A method to resolve the associated Promise with the value passed.
* If the promise is already settled it does nothing.
*
* @param {anything} value : This value is used to resolve the promise
* If the value is a Promise then the associated promise assumes the state
* of Promise passed as value.
*/
this.resolve = null;
/* A method to reject the assocaited Promise with the value passed.
* If the promise is already settled it does nothing.
*
* @param {anything} reason: The reason for the rejection of the Promise.
* Generally its an Error object. If however a Promise is passed, then the Promise
* itself will be the reason for rejection no matter the state of the Promise.
*/
this.reject = null;
/* A newly created Pomise object.
* Initially in pending state.
*/
this.promise = new Promise((resolve, reject) => {
this.resolve = resolve;
this.reject = reject;
});
Object.freeze(this);
}
}
export function isSubscribableOrPromise(value) {
return value && (typeof value.subscribe === 'function' || typeof value.then === 'function');
}
// Like BehaviorSubject but waits for a promise to resolve
export class ResolvedSubject extends Subject {
constructor(promise) {
super();
promise.then(val => {
this._resolved = true;
this.next(val);
});
}
get value() {
return this.getValue();
}
getValue() {
if (this.hasError) {
throw this.thrownError;
}
else if (this.closed) {
throw new ObjectUnsubscribedError();
}
else {
return this._value;
}
}
next(value) {
if (this._resolved) {
this._value = value;
super.next(value);
}
}
_subscribe(subscriber) {
const subscription = super._subscribe(subscriber);
if (this._resolved && subscription && !subscription.closed) {
subscriber.next(this._value);
}
return subscription;
}
}
export function convertToResolvedSubject(subject, promise) {
let resolvedSub = new ResolvedSubject(promise);
subject.subscribe(resolvedSub);
return resolvedSub;
}
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tslint:disable max-classes-per-file\n\nimport * as jiff from 'jiff';\nimport * as moment from 'moment';\n\nimport { SubscribableOrPromise } from 'rxjs/Observable';\nimport { Subject } from 'rxjs/Subject';\nimport { Subscriber } from 'rxjs/Subscriber';\nimport { Subscription } from 'rxjs/Subscription';\nimport { ObjectUnsubscribedError } from 'rxjs/util/ObjectUnsubscribedError';\n\nimport { clone } from 'lodash';\nimport { isObject } from 'lodash';\nimport { isString } from 'lodash';\nimport { map } from 'lodash';\n\nimport { Deferred as IDeferred, JSONPatch, LocalForage } from './types';\n\nlet hiddenKeyRegex = /^\\$+/;\n\nlet TIMESTAMP_RE = /^(\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d\\.\\d+)|(\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d)|(\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d)$/; // tslint:disable-line max-line-length\n\nexport function convertJsonDates(jsonData: any) {\n  let outObj;\n  if (Array.isArray(jsonData)) {\n    outObj = [];\n  } else {\n    outObj = {};\n  }\n  for (let key of Object.keys(jsonData)) {\n    let val = jsonData[key];\n    let res = val;\n    if (isString(val)) {\n      // The value is a string - does it match any of our things we want to convert\n      if (TIMESTAMP_RE.test(val)) {\n        // We're probably a timestamp\n        let dt = moment(val);\n        if (dt.isValid()) {\n          res = dt.toDate();\n        }\n      }\n    } else if (Array.isArray(val) || isObject(val)) {\n      res = convertJsonDates(val);\n    }\n\n    outObj[key] = res;\n  }\n\n  return outObj;\n}\n\nexport function toJSON(obj: any) {\n  return JSON.parse(JSON.stringify(obj));\n}\n\nexport function diff(obj1: any, obj2: any) {\n  obj1 = toJSON(obj1);\n  obj2 = toJSON(obj2);\n\n  return jiff.diff(obj1, obj2);\n}\n\nexport function applyPatch(res: any, patch: JSONPatch) {\n  // Go to JSON - don't do anything with dates\n  let obj = JSON.parse(JSON.stringify(res, toJsonReplacer));\n  obj = jiff.patch(patch, obj);\n\n  // Go back to dates etc\n  obj = convertJsonDates(obj);\n\n  removeResValues(res);\n  setResValues(res, obj);\n}\n\nexport function mergeObjects(mine: any, old: any, yours: any) {\n\n  // Make copies - we might modify the objects if ids dont exist\n  mine = clone(mine);\n  old = clone(old);\n\n  // First sort out _id's. We could have a new id if one doesn't exist on mine and old\n  if (!mine._id && !old._id && yours._id) {\n    mine._id = yours._id;\n    old._id = yours._id;\n  }\n\n  // We also need to convert into and out of dates\n  mine = toJSON(mine);\n  old = toJSON(old);\n  yours = toJSON(yours);\n\n  let yourpatch = jiff.diff(old, yours);\n  let mypatch = jiff.diff(old, mine);\n\n  let mypaths = map(mypatch, 'path');\n  let patch = yourpatch.filter((patchval: any) => {\n    return mypaths.indexOf(patchval.path) === -1;\n  });\n\n  let patched = jiff.patch(patch, mine);\n  return convertJsonDates(patched);\n}\n\nexport function forEachVal(res: any, cb: Function) {\n  for (let key in res) {\n    if (!hiddenKeyRegex.test(key)) {\n      cb(res, key);\n    }\n  }\n}\n\nexport function toJsonReplacer(key: any, value: any) {\n  let val = value;\n  if (isString(key) && key.charAt(0) === '$') {\n    val = undefined;\n  }\n\n  return val;\n}\n\nexport function fromJsonReviver(_: any, value: any) {\n  let val = value;\n  if (isString(value) && TIMESTAMP_RE.test(value)) {\n    let dt = moment(value);\n    if (dt.isValid()) {\n      val = dt.toDate();\n    }\n  }\n\n  return val;\n}\n\nexport function toObject(res: any) {\n  // The toJsonReplacer gets rid of attributes beginning with $ and the fromJsonReviver\n  // converts date strings back into dates\n  let str = JSON.stringify(res, toJsonReplacer);\n\n  try {\n    return JSON.parse(str, fromJsonReviver);\n  } catch (err) {\n    // Older versions of IE8 throw 'Out of stack space' errors if we use a reviver function\n    // due to the bug described here: http://support.microsoft.com/kb/976662. Everyone hates\n    // IE\n    if (err.message === 'Out of stack space') {\n      return convertJsonDates(JSON.parse(str));\n    }\n\n    throw(err);\n  }\n}\n\nexport function removeResValues(res: any) {\n  forEachVal(res, (_: any, key: any) => {\n    delete res[key];\n  });\n}\n\nexport function setResValues(res: any, vals: any) {\n  for (let key of Object.keys(vals)) {\n    res[key] = vals[key];\n  }\n}\n\nexport function persistentStorageKey(url: string) {\n  return 'or2ws:' + url;\n}\n\nexport function advancedStorage(localForage: LocalForage) {\n  return localForage.driver() !== 'localStorageWrapper';\n}\n\n// lifted from here -> http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/2117523#2117523\nexport function uuid() {\n  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {\n    let r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8); // tslint:disable-line\n    return v.toString(16);\n  });\n}\n\nexport class Deferred<T> implements IDeferred<T> {\n  public promise: Promise<T>;\n  public resolve: (val?: T) => void;\n  public reject: (err: Error) => void;\n\n  constructor() {\n    /* A method to resolve the associated Promise with the value passed.\n     * If the promise is already settled it does nothing.\n     *\n     * @param {anything} value : This value is used to resolve the promise\n     * If the value is a Promise then the associated promise assumes the state\n     * of Promise passed as value.\n     */\n    this.resolve = null;\n\n    /* A method to reject the assocaited Promise with the value passed.\n     * If the promise is already settled it does nothing.\n     *\n     * @param {anything} reason: The reason for the rejection of the Promise.\n     * Generally its an Error object. If however a Promise is passed, then the Promise\n     * itself will be the reason for rejection no matter the state of the Promise.\n     */\n    this.reject = null;\n\n    /* A newly created Pomise object.\n     * Initially in pending state.\n     */\n    this.promise = new Promise((resolve, reject) => {\n      this.resolve = resolve;\n      this.reject = reject;\n    });\n    Object.freeze(this);\n  }\n}\n\nexport function isSubscribableOrPromise<T>(value: any): value is SubscribableOrPromise<T> {\n  return value && (typeof value.subscribe === 'function' || typeof value.then === 'function');\n}\n\n// Like BehaviorSubject but waits for a promise to resolve\nexport class ResolvedSubject<T> extends Subject<T> {\n  private _value: T;\n  private _resolved: boolean;\n\n  constructor(promise: Promise<T>) {\n    super();\n\n    promise.then(val => {\n      this._resolved = true;\n      this.next(val);\n    });\n  }\n\n  public get value() {\n    return this.getValue();\n  }\n\n  public getValue() {\n    if (this.hasError) {\n      throw this.thrownError;\n    } else if (this.closed) {\n      throw new ObjectUnsubscribedError();\n    } else {\n      return this._value;\n    }\n  }\n\n  public next(value: T) {\n    if (this._resolved) {\n      this._value = value;\n      super.next(value);\n    }\n  }\n\n  protected _subscribe(subscriber: Subscriber<T>): Subscription {\n    const subscription = super._subscribe(subscriber);\n    if (this._resolved && subscription && !subscription.closed) {\n        subscriber.next(this._value);\n    }\n    return subscription;\n  }\n}\n\nexport function convertToResolvedSubject<T>(subject: Subject<T>, promise: Promise<T>) {\n  let resolvedSub = new ResolvedSubject<T>(promise);\n  subject.subscribe(resolvedSub);\n  return resolvedSub;\n}\n"]}