Angular front end, express, node.js, JSON 聊天室

{"ast":null,"code":"var _class, _class2, _class3, _class4, _class5, _class6, _class7, _class8, _class9, _class10, _class12, _class13, _class14, _class15, _class16, _class17, _class18, _class19, _class20, _class21, _class22, _class23, _class24, _class25, _class26;\n/**\n * @license Angular v16.2.2\n * (c) 2010-2022 Google LLC. https://angular.io/\n * License: MIT\n */\n\nimport { Subject, Subscription, BehaviorSubject, Observable, merge as merge$1, of } from 'rxjs';\nimport { share, switchMap, distinctUntilChanged, first } from 'rxjs/operators';\nfunction getClosureSafeProperty(objWithPropertyToExtract) {\n for (let key in objWithPropertyToExtract) {\n if (objWithPropertyToExtract[key] === getClosureSafeProperty) {\n return key;\n }\n }\n throw Error('Could not find renamed property on target object.');\n}\n/**\n * Sets properties on a target object from a source object, but only if\n * the property doesn't already exist on the target object.\n * @param target The target to set properties on\n * @param source The source of the property keys and values to set\n */\nfunction fillProperties(target, source) {\n for (const key in source) {\n if (source.hasOwnProperty(key) && !target.hasOwnProperty(key)) {\n target[key] = source[key];\n }\n }\n}\nfunction stringify(token) {\n if (typeof token === 'string') {\n return token;\n }\n if (Array.isArray(token)) {\n return '[' + token.map(stringify).join(', ') + ']';\n }\n if (token == null) {\n return '' + token;\n }\n if (token.overriddenName) {\n return `${token.overriddenName}`;\n }\n if (token.name) {\n return `${token.name}`;\n }\n const res = token.toString();\n if (res == null) {\n return '' + res;\n }\n const newLineIndex = res.indexOf('\\n');\n return newLineIndex === -1 ? res : res.substring(0, newLineIndex);\n}\n/**\n * Concatenates two strings with separator, allocating new strings only when necessary.\n *\n * @param before before string.\n * @param separator separator string.\n * @param after after string.\n * @returns concatenated string.\n */\nfunction concatStringsWithSpace(before, after) {\n return before == null || before === '' ? after === null ? '' : after : after == null || after === '' ? before : before + ' ' + after;\n}\nconst __forward_ref__ = getClosureSafeProperty({\n __forward_ref__: getClosureSafeProperty\n});\n/**\n * Allows to refer to references which are not yet defined.\n *\n * For instance, `forwardRef` is used when the `token` which we need to refer to for the purposes of\n * DI is declared, but not yet defined. It is also used when the `token` which we use when creating\n * a query is not yet defined.\n *\n * `forwardRef` is also used to break circularities in standalone components imports.\n *\n * @usageNotes\n * ### Circular dependency example\n * {@example core/di/ts/forward_ref/forward_ref_spec.ts region='forward_ref'}\n *\n * ### Circular standalone reference import example\n * ```ts\n * @Component({\n * standalone: true,\n * imports: [ChildComponent],\n * selector: 'app-parent',\n * template: `<app-child [hideParent]=\"hideParent\"></app-child>`,\n * })\n * export class ParentComponent {\n * @Input() hideParent: boolean;\n * }\n *\n *\n * @Component({\n * standalone: true,\n * imports: [CommonModule, forwardRef(() => ParentComponent)],\n * selector: 'app-child',\n * template: `<app-parent *ngIf=\"!hideParent\"></app-parent>`,\n * })\n * export class ChildComponent {\n * @Input() hideParent: boolean;\n * }\n * ```\n *\n * @publicApi\n */\nfunction forwardRef(forwardRefFn) {\n forwardRefFn.__forward_ref__ = forwardRef;\n forwardRefFn.toString = function () {\n return stringify(this());\n };\n return forwardRefFn;\n}\n/**\n * Lazily retrieves the reference value from a forwardRef.\n *\n * Acts as the identity function when given a non-forward-ref value.\n *\n * @usageNotes\n * ### Example\n *\n * {@example core/di/ts/forward_ref/forward_ref_spec.ts region='resolve_forward_ref'}\n *\n * @see {@link forwardRef}\n * @publicApi\n */\nfunction resolveForwardRef(type) {\n return isForwardRef(type) ? type() : type;\n}\n/** Checks whether a function is wrapped by a `forwardRef`. */\nfunction isForwardRef(fn) {\n return typeof fn === 'function' && fn.hasOwnProperty(__forward_ref__) && fn.__forward_ref__ === forwardRef;\n}\nfunction isEnvironmentProviders(value) {\n return value && !!value.ɵproviders;\n}\n\n/**\n * Base URL for the error details page.\n *\n * Keep this constant in sync across:\n * - packages/compiler-cli/src/ngtsc/diagnostics/src/error_details_base_url.ts\n * - packages/core/src/error_details_base_url.ts\n */\nconst ERROR_DETAILS_PAGE_BASE_URL = 'https://angular.io/errors';\n/**\n * URL for the XSS security documentation.\n */\nconst XSS_SECURITY_URL = 'https://g.co/ng/security#xss';\n\n/**\n * Class that represents a runtime error.\n * Formats and outputs the error message in a consistent way.\n *\n * Example:\n * ```\n * throw new RuntimeError(\n * RuntimeErrorCode.INJECTOR_ALREADY_DESTROYED,\n * ngDevMode && 'Injector has already been destroyed.');\n * ```\n *\n * Note: the `message` argument contains a descriptive error message as a string in development\n * mode (when the `ngDevMode` is defined). In production mode (after tree-shaking pass), the\n * `message` argument becomes `false`, thus we account for it in the typings and the runtime\n * logic.\n */\nclass RuntimeError extends Error {\n constructor(code, message) {\n super(formatRuntimeError(code, message));\n this.code = code;\n }\n}\n/**\n * Called to format a runtime error.\n * See additional info on the `message` argument type in the `RuntimeError` class description.\n */\nfunction formatRuntimeError(code, message) {\n // Error code might be a negative number, which is a special marker that instructs the logic to\n // generate a link to the error details page on angular.io.\n // We also prepend `0` to non-compile-time errors.\n const fullCode = `NG0${Math.abs(code)}`;\n let errorMessage = `${fullCode}${message ? ': ' + message : ''}`;\n if (ngDevMode && code < 0) {\n const addPeriodSeparator = !errorMessage.match(/[.,;!?\\n]$/);\n const separator = addPeriodSeparator ? '.' : '';\n errorMessage = `${errorMessage}${separator} Find more at ${ERROR_DETAILS_PAGE_BASE_URL}/${fullCode}`;\n }\n return errorMessage;\n}\n\n/**\n * Used for stringify render output in Ivy.\n * Important! This function is very performance-sensitive and we should\n * be extra careful not to introduce megamorphic reads in it.\n * Check `core/test/render3/perf/render_stringify` for benchmarks and alternate implementations.\n */\nfunction renderStringify(value) {\n if (typeof value === 'string') return value;\n if (value == null) return '';\n // Use `String` so that it invokes the `toString` method of the value. Note that this\n // appears to be faster than calling `value.toString` (see `render_stringify` benchmark).\n return String(value);\n}\n/**\n * Used to stringify a value so that it can be displayed in an error message.\n * Important! This function contains a megamorphic read and should only be\n * used for error messages.\n */\nfunction stringifyForError(value) {\n if (typeof value === 'function') return value.name || value.toString();\n if (typeof value === 'object' && value != null && typeof value.type === 'function') {\n return value.type.name || value.type.toString();\n }\n return renderStringify(value);\n}\n\n/** Called when directives inject each other (creating a circular dependency) */\nfunction throwCyclicDependencyError(token, path) {\n const depPath = path ? `. Dependency path: ${path.join(' > ')} > ${token}` : '';\n throw new RuntimeError(-200 /* RuntimeErrorCode.CYCLIC_DI_DEPENDENCY */, `Circular dependency in DI detected for ${token}${depPath}`);\n}\nfunction throwMixedMultiProviderError() {\n throw new Error(`Cannot mix multi providers and regular providers`);\n}\nfunction thr