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ngx-store

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Angular decorators to automagically keep variables in HTML5 LocalStorage, SessionStorage, cookies; injectable services for managing and listening to data changes and a bit more.

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import { Config } from '../config/config'; const _get = require('lodash.get'); const _set = require('lodash.set'); const _merge = require('lodash.merge'); export class Resource { constructor(service, key) { this.service = service; this.key = key; this._defaultValue = null; this._path = []; this._prefix = Config.prefix; } /** * Returns default value * @returns {T} */ get defaultValue() { return this._defaultValue; } /** * Returns current path as a string * @returns {string} */ get path() { return this.pathString; } /** * Returns currently set prefix * @returns {string} */ get prefix() { return this._prefix || ''; } /** * Returns value taking path into account * @returns {T} */ get value() { return this.considerDefault(this.readValue()); } get fullValue() { return this.considerDefault(this.service.utility.get(this.key, { prefix: this._prefix })); } get pathString() { return this._path.join('.'); } /** * Sets path of object property * @param {string} path * @returns {this} */ setPath(path) { this._path = path.split('.'); return this; } /** * Appends current path * e.g. if path('key') and appendPath('nested'), the path will be "key.nested" * @param {string} path * @returns {this} */ appendPath(path) { this._path.push(path); return this; } /** * Removes last item of path * e.g. if path('key.nested') and truncatePath(), the path will be "key" * @returns {this} */ truncatePath() { this._path.pop(); return this; } /** * Resets set path * @returns {this} */ resetPath() { this._path = []; return this; } /** * Sets prefix * @param {string} prefix * @returns {this} */ setPrefix(prefix) { this._prefix = prefix; return this; } /** * Moves storage item to new key using given prefix * @param {string} prefix * @returns {this} */ changePrefix(prefix) { this.service.utility.set(this.key, this.fullValue, { prefix }); this.service.utility.remove(this.key, { prefix: this._prefix }); return this.setPrefix(prefix); } /** * Sets default value for both reading and saving operations * @param defaultValue * @returns {this} */ setDefaultValue(defaultValue) { this._defaultValue = defaultValue; const value = this.readValue(); if (this.isNullOrUndefined(value)) { this.save(defaultValue); } return this; } /** * Creates or overrides value as a new entry or existing object property depending on path * @param value * @returns {this} */ save(value) { if (this.pathString) { value = _set(this.fullValue, this.pathString, this.considerDefault(value)); } this.service.utility.set(this.key, this.considerDefault(value), { prefix: this._prefix }); return this; } /** * Updates existing object property using current path * @param {T} value * @returns {this} */ update(value) { return this.save(_merge(this.readValue(), value)); } /** * Removes item stored under current key * @returns {this} */ remove() { this.service.utility.remove(this.key); return this; } considerDefault(value) { return this.isNullOrUndefined(value) ? this._defaultValue : value; } isNullOrUndefined(value) { return (value === null || value === undefined); } readValue() { const value = this.service.utility.get(this.key, { prefix: this._prefix }); if (this.pathString) { return _get(value, this.pathString); } return value; } } //# 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{ WebStorageService } from './webstorage.service';\nimport { Config } from '../config/config';\n\nconst _get = require('lodash.get');\nconst _set = require('lodash.set');\nconst _merge = require('lodash.merge');\n\nexport class Resource<T> {\n  constructor(protected service: WebStorageService, protected readonly key: string) {\n  }\n\n  protected _defaultValue: any = null;\n\n  /**\n   * Returns default value\n   * @returns {T}\n   */\n  public get defaultValue(): T {\n    return this._defaultValue;\n  }\n\n  protected _path: Array<string> = [];\n\n  /**\n   * Returns current path as a string\n   * @returns {string}\n   */\n  public get path(): string {\n    return this.pathString;\n  }\n\n  protected _prefix = Config.prefix;\n\n  /**\n   * Returns currently set prefix\n   * @returns {string}\n   */\n  public get prefix(): string {\n    return this._prefix || '';\n  }\n\n  /**\n   * Returns value taking path into account\n   * @returns {T}\n   */\n  public get value(): T {\n    return this.considerDefault(this.readValue());\n  }\n\n  protected get fullValue(): T {\n    return this.considerDefault(this.service.utility.get(this.key, {prefix: this._prefix}));\n  }\n\n  protected get pathString(): string {\n    return this._path.join('.');\n  }\n\n  /**\n   * Sets path of object property\n   * @param {string} path\n   * @returns {this}\n   */\n  public setPath(path: string): this {\n    this._path = path.split('.');\n    return this;\n  }\n\n  /**\n   * Appends current path\n   * e.g. if path('key') and appendPath('nested'), the path will be \"key.nested\"\n   * @param {string} path\n   * @returns {this}\n   */\n  public appendPath(path: string): this {\n    this._path.push(path);\n    return this;\n  }\n\n  /**\n   * Removes last item of path\n   * e.g. if path('key.nested') and truncatePath(), the path will be \"key\"\n   * @returns {this}\n   */\n  public truncatePath(): this {\n    this._path.pop();\n    return this;\n  }\n\n  /**\n   * Resets set path\n   * @returns {this}\n   */\n  public resetPath(): this {\n    this._path = [];\n    return this;\n  }\n\n  /**\n   * Sets prefix\n   * @param {string} prefix\n   * @returns {this}\n   */\n  public setPrefix(prefix: string): this {\n    this._prefix = prefix;\n    return this;\n  }\n\n  /**\n   * Moves storage item to new key using given prefix\n   * @param {string} prefix\n   * @returns {this}\n   */\n  public changePrefix(prefix: string): this {\n    this.service.utility.set(this.key, this.fullValue, {prefix});\n    this.service.utility.remove(this.key, {prefix: this._prefix});\n    return this.setPrefix(prefix);\n  }\n\n  /**\n   * Sets default value for both reading and saving operations\n   * @param defaultValue\n   * @returns {this}\n   */\n  public setDefaultValue(defaultValue: T): this {\n    this._defaultValue = defaultValue;\n    const value = this.readValue();\n    if (this.isNullOrUndefined(value)) {\n      this.save(defaultValue);\n    }\n    return this;\n  }\n\n  /**\n   * Creates or overrides value as a new entry or existing object property depending on path\n   * @param value\n   * @returns {this}\n   */\n  public save(value: T): this {\n    if (this.pathString) {\n      value = _set(this.fullValue as any as object, this.pathString, this.considerDefault(value)) as any as T;\n    }\n    this.service.utility.set(this.key, this.considerDefault(value), {prefix: this._prefix});\n    return this;\n  }\n\n  /**\n   * Updates existing object property using current path\n   * @param {T} value\n   * @returns {this}\n   */\n  public update(value: T): this {\n    return this.save(_merge(this.readValue(), value));\n  }\n\n  /**\n   * Removes item stored under current key\n   * @returns {this}\n   */\n  public remove(): this {\n    this.service.utility.remove(this.key);\n    return this;\n  }\n\n  protected considerDefault<S>(value: S): S {\n    return this.isNullOrUndefined(value) ? this._defaultValue : value;\n  }\n\n  protected isNullOrUndefined(value: any): boolean {\n    return (value === null || value === undefined);\n  }\n\n  protected readValue(): T {\n    const value = this.service.utility.get(this.key, {prefix: this._prefix});\n    if (this.pathString) {\n      return _get(value, this.pathString);\n    }\n    return value;\n  }\n}\n"]}