ngx-store
Version:
Angular decorators to automagically keep variables in HTML5 LocalStorage, SessionStorage, cookies; injectable services for managing and listening to data changes and a bit more.
118 lines • 16.5 kB
JavaScript
import { Config, debug } from '../config/config';
import { Cache } from '../decorator/cache';
import { delay, filter } from 'rxjs/operators';
import { NgxStorageEvent } from '../utility/storage/storage-event';
import { Resource } from './resource';
import merge from 'lodash.merge';
// const merge = require('lodash.merge');
export class WebStorageService {
constructor(utility) {
this.utility = utility;
}
/**
* Gets keys for stored variables created by ngx-store,
* ignores keys that have not been created by decorators and have no prefix at once
*/
get keys() {
// get prefixed key if prefix is defined
const prefixKeys = this.utility.keys.filter(key => {
if (this.utility.prefix && this.utility.prefix.length) {
return key.startsWith(this.utility.prefix);
}
return true;
});
const decoratorKeys = this.constructor.keys;
return prefixKeys.concat(decoratorKeys);
}
get config() {
return Config;
}
get(key) {
return this.utility.get(key);
}
/**
* Returns new data Resource for given key exposing builder design pattern
* designed for complex nested data structures
*/
load(key) {
return new Resource(this, key);
}
set(key, value) {
return this.utility.set(key, value);
}
update(key, changes) {
const value = this.get(key);
if (value !== undefined && typeof value !== 'object') {
debug.throw(new Error(`Value stored under "${key}" key is not an object and tried to be updated.`));
return value;
}
return this.set(key, merge({}, value, changes));
}
// TODO return true if item existed and false otherwise (?)
remove(key) {
return this.utility.remove(key);
}
observe(key, exactMatch) {
return this._changes.pipe(filter((event) => {
var _a;
if (!key) {
return true;
}
if (exactMatch) {
if (Config.prefix && key.startsWith(Config.prefix)) {
return event.key === key;
}
return event.key === Config.prefix + key;
}
else {
return ((_a = event.key) === null || _a === void 0 ? void 0 : _a.indexOf(key)) !== -1;
}
}), delay(30));
}
/**
* Clears chosen data from Storage
* @param clearType 'prefix' | 'decorators' | 'all'
* @param prefixOrClass defines the prefix or class (not its instance) whose decorators should be cleared
*/
clear(clearType, prefixOrClass) {
clearType = clearType || Config.clearType;
if (clearType === 'decorators') {
let keys = [];
if (typeof prefixOrClass === 'object') {
keys = this.keys.filter(key => Cache.get(key).targets.includes(prefixOrClass));
debug.log(this.utility.getStorageName() + ' > Removing decorated data from '
+ prefixOrClass.constructor.name + ':', keys);
}
else {
keys = this.keys;
debug.log(this.utility.getStorageName() + ' > Removing decorated data:', keys);
}
keys.forEach(key => this.remove(key));
}
else if (clearType === 'prefix') {
prefixOrClass = prefixOrClass || this.utility.prefix;
this.utility.forEach((value, key) => {
if (key.startsWith(prefixOrClass)) {
this.remove(this.utility.trimPrefix(key));
}
});
}
else if (clearType === 'all') {
this.utility.clear();
}
}
generateEvent(key, newValue, oldValue) {
const type = this.utility.getStorageName().charAt(0).toLowerCase() + this.utility.getStorageName().slice(1);
const event = new NgxStorageEvent(type, key, this.utility.getStorage());
event.oldValue = (oldValue !== undefined) ? oldValue : this.get(key);
event.newValue = newValue;
return event;
}
mapNativeEvent(ev) {
const event = this.generateEvent(ev.key, this.utility.getGettable(ev.newValue), this.utility.getGettable(ev.oldValue));
event.isInternal = false;
return event;
}
}
WebStorageService.keys = [];
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{ Config, debug } from '../config/config';\nimport { ClearType, WebStorageConfigInterface } from '../config/config.interface';\nimport { WebStorageUtility } from '../utility/webstorage.utility';\nimport { WebStorageServiceInterface } from './webstorage.interface';\nimport { Cache } from '../decorator/cache';\nimport { Observable } from 'rxjs';\nimport { delay, filter } from 'rxjs/operators';\nimport { NgxStorageEvent } from '../utility/storage/storage-event';\nimport { Resource } from './resource';\nimport merge from 'lodash.merge';\n\n// const merge = require('lodash.merge');\n\nexport abstract class WebStorageService {\n  public static keys: Array<string> = [];\n  // @ts-ignore\n  protected _changes: Observable<NgxStorageEvent>;\n\n  protected constructor(public utility: WebStorageUtility) {\n  }\n\n  /**\n   * Gets keys for stored variables created by ngx-store,\n   * ignores keys that have not been created by decorators and have no prefix at once\n   */\n  public get keys(): Array<string> {\n    // get prefixed key if prefix is defined\n    const prefixKeys = this.utility.keys.filter(key => {\n      if (this.utility.prefix && this.utility.prefix.length) {\n        return key.startsWith(this.utility.prefix);\n      }\n      return true;\n    });\n    const decoratorKeys = (this.constructor as WebStorageServiceInterface).keys;\n    return prefixKeys.concat(decoratorKeys);\n  }\n\n  public get config(): WebStorageConfigInterface {\n    return Config;\n  }\n\n  public get(key: string): any {\n    return this.utility.get(key);\n  }\n\n  /**\n   * Returns new data Resource for given key exposing builder design pattern\n   * designed for complex nested data structures\n   */\n  public load(key: string): Resource<any> {\n    return new Resource(this, key);\n  }\n\n  public set<T>(key: string, value: T): T {\n    return this.utility.set(key, value) as T;\n  }\n\n  public update(key: string, changes: any): any {\n    const value = this.get(key);\n    if (value !== undefined && typeof value !== 'object') {\n      debug.throw(new Error(`Value stored under \"${key}\" key is not an object and tried to be updated.`));\n      return value;\n    }\n    return this.set(key, merge({}, value, changes));\n  }\n\n  // TODO return true if item existed and false otherwise (?)\n  public remove(key: string): void {\n    return this.utility.remove(key);\n  }\n\n  public observe(key?: string, exactMatch?: boolean): Observable<NgxStorageEvent> {\n    return this._changes.pipe(\n      filter((event: NgxStorageEvent) => {\n        if (!key) {\n          return true;\n        }\n        if (exactMatch) {\n          if (Config.prefix && key.startsWith(Config.prefix)) {\n            return event.key === key;\n          }\n          return event.key === Config.prefix + key;\n        } else {\n          return event.key?.indexOf(key) !== -1;\n        }\n      }),\n      delay(30), // event should come after actual data change and propagation\n    );\n  }\n\n  /**\n   * Clears chosen data from Storage\n   * @param clearType 'prefix' | 'decorators' | 'all'\n   * @param prefixOrClass defines the prefix or class (not its instance) whose decorators should be cleared\n   */\n  public clear(clearType?: ClearType, prefixOrClass?: string | object): void {\n    clearType = clearType || Config.clearType;\n    if (clearType === 'decorators') {\n      let keys = [];\n      if (typeof prefixOrClass === 'object') {\n        keys = this.keys.filter(key => Cache.get(key).targets.includes(prefixOrClass as object));\n        debug.log(this.utility.getStorageName() + ' > Removing decorated data from '\n          + prefixOrClass.constructor.name + ':', keys);\n      } else {\n        keys = this.keys;\n        debug.log(this.utility.getStorageName() + ' > Removing decorated data:', keys);\n      }\n      keys.forEach(key => this.remove(key));\n    } else if (clearType === 'prefix') {\n      prefixOrClass = prefixOrClass || this.utility.prefix;\n      this.utility.forEach((value, key) => {\n        if (key.startsWith(prefixOrClass as string)) {\n          this.remove(this.utility.trimPrefix(key));\n        }\n      });\n    } else if (clearType === 'all') {\n      this.utility.clear();\n    }\n  }\n\n  protected generateEvent(key: string, newValue: any, oldValue?: any): NgxStorageEvent {\n    const type = this.utility.getStorageName().charAt(0).toLowerCase() + this.utility.getStorageName().slice(1);\n    const event = new NgxStorageEvent(type, key, this.utility.getStorage());\n    event.oldValue = (oldValue !== undefined) ? oldValue : this.get(key);\n    event.newValue = newValue;\n    return event;\n  }\n\n  protected mapNativeEvent(ev: StorageEvent): NgxStorageEvent {\n    const event = this.generateEvent(\n      ev.key as string,\n      this.utility.getGettable(ev.newValue as string),\n      this.utility.getGettable(ev.oldValue as string));\n    event.isInternal = false;\n    return event;\n  }\n}\n"]}