/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { __decorate } from "tslib";
import { DOCUMENT } from '@angular/common';
import { APP_ID, Injectable, NgModule } from '@angular/core';
export function escapeHtml(text) {
    var escapedText = {
        '&': '&a;',
        '"': '&q;',
        '\'': '&s;',
        '<': '&l;',
        '>': '&g;',
    };
    return text.replace(/[&"'<>]/g, function (s) { return escapedText[s]; });
}
export function unescapeHtml(text) {
    var unescapedText = {
        '&a;': '&',
        '&q;': '"',
        '&s;': '\'',
        '&l;': '<',
        '&g;': '>',
    };
    return text.replace(/&[^;]+;/g, function (s) { return unescapedText[s]; });
}
/**
 * Create a `StateKey<T>` that can be used to store value of type T with `TransferState`.
 *
 * Example:
 *
 * ```
 * const COUNTER_KEY = makeStateKey<number>('counter');
 * let value = 10;
 *
 * transferState.set(COUNTER_KEY, value);
 * ```
 *
 * @publicApi
 */
export function makeStateKey(key) {
    return key;
}
/**
 * A key value store that is transferred from the application on the server side to the application
 * on the client side.
 *
 * `TransferState` will be available as an injectable token. To use it import
 * `ServerTransferStateModule` on the server and `BrowserTransferStateModule` on the client.
 *
 * The values in the store are serialized/deserialized using JSON.stringify/JSON.parse. So only
 * boolean, number, string, null and non-class objects will be serialized and deserialzied in a
 * non-lossy manner.
 *
 * @publicApi
 */
var TransferState = /** @class */ (function () {
    function TransferState() {
        this.store = {};
        this.onSerializeCallbacks = {};
    }
    TransferState_1 = TransferState;
    /** @internal */
    TransferState.init = function (initState) {
        var transferState = new TransferState_1();
        transferState.store = initState;
        return transferState;
    };
    /**
     * Get the value corresponding to a key. Return `defaultValue` if key is not found.
     */
    TransferState.prototype.get = function (key, defaultValue) {
        return this.store[key] !== undefined ? this.store[key] : defaultValue;
    };
    /**
     * Set the value corresponding to a key.
     */
    TransferState.prototype.set = function (key, value) { this.store[key] = value; };
    /**
     * Remove a key from the store.
     */
    TransferState.prototype.remove = function (key) { delete this.store[key]; };
    /**
     * Test whether a key exists in the store.
     */
    TransferState.prototype.hasKey = function (key) { return this.store.hasOwnProperty(key); };
    /**
     * Register a callback to provide the value for a key when `toJson` is called.
     */
    TransferState.prototype.onSerialize = function (key, callback) {
        this.onSerializeCallbacks[key] = callback;
    };
    /**
     * Serialize the current state of the store to JSON.
     */
    TransferState.prototype.toJson = function () {
        // Call the onSerialize callbacks and put those values into the store.
        for (var key in this.onSerializeCallbacks) {
            if (this.onSerializeCallbacks.hasOwnProperty(key)) {
                try {
                    this.store[key] = this.onSerializeCallbacks[key]();
                }
                catch (e) {
                    console.warn('Exception in onSerialize callback: ', e);
                }
            }
        }
        return JSON.stringify(this.store);
    };
    var TransferState_1;
    TransferState = TransferState_1 = __decorate([
        Injectable()
    ], TransferState);
    return TransferState;
}());
export { TransferState };
export function initTransferState(doc, appId) {
    // Locate the script tag with the JSON data transferred from the server.
    // The id of the script tag is set to the Angular appId + 'state'.
    var script = doc.getElementById(appId + '-state');
    var initialState = {};
    if (script && script.textContent) {
        try {
            initialState = JSON.parse(unescapeHtml(script.textContent));
        }
        catch (e) {
            console.warn('Exception while restoring TransferState for app ' + appId, e);
        }
    }
    return TransferState.init(initialState);
}
/**
 * NgModule to install on the client side while using the `TransferState` to transfer state from
 * server to client.
 *
 * @publicApi
 */
var BrowserTransferStateModule = /** @class */ (function () {
    function BrowserTransferStateModule() {
    }
    BrowserTransferStateModule = __decorate([
        NgModule({
            providers: [{ provide: TransferState, useFactory: initTransferState, deps: [DOCUMENT, APP_ID] }],
        })
    ], BrowserTransferStateModule);
    return BrowserTransferStateModule;
}());
export { BrowserTransferStateModule };
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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {APP_ID, Injectable, NgModule} from '@angular/core';\n\nexport function escapeHtml(text: string): string {\n  const escapedText: {[k: string]: string} = {\n    '&': '&a;',\n    '\"': '&q;',\n    '\\'': '&s;',\n    '<': '&l;',\n    '>': '&g;',\n  };\n  return text.replace(/[&\"'<>]/g, s => escapedText[s]);\n}\n\nexport function unescapeHtml(text: string): string {\n  const unescapedText: {[k: string]: string} = {\n    '&a;': '&',\n    '&q;': '\"',\n    '&s;': '\\'',\n    '&l;': '<',\n    '&g;': '>',\n  };\n  return text.replace(/&[^;]+;/g, s => unescapedText[s]);\n}\n\n/**\n * A type-safe key to use with `TransferState`.\n *\n * Example:\n *\n * ```\n * const COUNTER_KEY = makeStateKey<number>('counter');\n * let value = 10;\n *\n * transferState.set(COUNTER_KEY, value);\n * ```\n *\n * @publicApi\n */\nexport type StateKey<T> = string & {__not_a_string: never};\n\n/**\n * Create a `StateKey<T>` that can be used to store value of type T with `TransferState`.\n *\n * Example:\n *\n * ```\n * const COUNTER_KEY = makeStateKey<number>('counter');\n * let value = 10;\n *\n * transferState.set(COUNTER_KEY, value);\n * ```\n *\n * @publicApi\n */\nexport function makeStateKey<T = void>(key: string): StateKey<T> {\n  return key as StateKey<T>;\n}\n\n/**\n * A key value store that is transferred from the application on the server side to the application\n * on the client side.\n *\n * `TransferState` will be available as an injectable token. To use it import\n * `ServerTransferStateModule` on the server and `BrowserTransferStateModule` on the client.\n *\n * The values in the store are serialized/deserialized using JSON.stringify/JSON.parse. So only\n * boolean, number, string, null and non-class objects will be serialized and deserialzied in a\n * non-lossy manner.\n *\n * @publicApi\n */\n@Injectable()\nexport class TransferState {\n  private store: {[k: string]: {} | undefined} = {};\n  private onSerializeCallbacks: {[k: string]: () => {} | undefined} = {};\n\n  /** @internal */\n  static init(initState: {}) {\n    const transferState = new TransferState();\n    transferState.store = initState;\n    return transferState;\n  }\n\n  /**\n   * Get the value corresponding to a key. Return `defaultValue` if key is not found.\n   */\n  get<T>(key: StateKey<T>, defaultValue: T): T {\n    return this.store[key] !== undefined ? this.store[key] as T : defaultValue;\n  }\n\n  /**\n   * Set the value corresponding to a key.\n   */\n  set<T>(key: StateKey<T>, value: T): void { this.store[key] = value; }\n\n  /**\n   * Remove a key from the store.\n   */\n  remove<T>(key: StateKey<T>): void { delete this.store[key]; }\n\n  /**\n   * Test whether a key exists in the store.\n   */\n  hasKey<T>(key: StateKey<T>) { return this.store.hasOwnProperty(key); }\n\n  /**\n   * Register a callback to provide the value for a key when `toJson` is called.\n   */\n  onSerialize<T>(key: StateKey<T>, callback: () => T): void {\n    this.onSerializeCallbacks[key] = callback;\n  }\n\n  /**\n   * Serialize the current state of the store to JSON.\n   */\n  toJson(): string {\n    // Call the onSerialize callbacks and put those values into the store.\n    for (const key in this.onSerializeCallbacks) {\n      if (this.onSerializeCallbacks.hasOwnProperty(key)) {\n        try {\n          this.store[key] = this.onSerializeCallbacks[key]();\n        } catch (e) {\n          console.warn('Exception in onSerialize callback: ', e);\n        }\n      }\n    }\n    return JSON.stringify(this.store);\n  }\n}\n\nexport function initTransferState(doc: Document, appId: string) {\n  // Locate the script tag with the JSON data transferred from the server.\n  // The id of the script tag is set to the Angular appId + 'state'.\n  const script = doc.getElementById(appId + '-state');\n  let initialState = {};\n  if (script && script.textContent) {\n    try {\n      initialState = JSON.parse(unescapeHtml(script.textContent));\n    } catch (e) {\n      console.warn('Exception while restoring TransferState for app ' + appId, e);\n    }\n  }\n  return TransferState.init(initialState);\n}\n\n/**\n * NgModule to install on the client side while using the `TransferState` to transfer state from\n * server to client.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [{provide: TransferState, useFactory: initTransferState, deps: [DOCUMENT, APP_ID]}],\n})\nexport class BrowserTransferStateModule {\n}\n"]}