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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | 2x 2x 24x 24x 24x 24x 2x 22x 1x 21x 1x 20x 3x 17x 1x 16x 3x 13x 1x 12x 6x 6x 6x 3x 3x 7x 7x 2x 1x 1x 1x 5x 1x 4x 3x 3x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import { HttpErrorResponse } from '@angular/common/http';
import { Injectable } from '@angular/core';
/**
* Extracted error info for consistent handling
*/
export interface MappedHttpError {
/** User-friendly message to display */
message: string;
/** Original HTTP status code */
status: number;
/** Whether this is a network/connectivity error (status 0) */
isNetworkError: boolean;
/** Whether this is a server error (5xx) */
isServerError: boolean;
/** Whether this is a client error (4xx) */
isClientError: boolean;
}
/**
* Service for mapping HTTP errors to user-friendly messages.
*
* Can be extended/overridden for custom error messages or i18n.
*/
@Injectable({ providedIn: 'root' })
export class HttpErrorMapperService {
/**
* Maps an HttpErrorResponse to a user-friendly error structure.
*/
mapError(err: HttpErrorResponse): MappedHttpError {
const status = err.status;
const message = this.getErrorMessage(err);
return {
message,
status,
isNetworkError: status === 0,
isServerError: status >= 500,
isClientError: status >= 400 && status < 500,
};
}
/**
* Gets a user-friendly error message for the given HTTP error.
* Override this method to customize messages or add i18n support.
*/
protected getErrorMessage(err: HttpErrorResponse): string {
// Network error (no connection, CORS, etc.)
if (err.status === 0) {
return 'Сетевая ошибка. Проверьте подключение к интернету.';
}
// Authentication required
if (err.status === 401) {
return 'Требуется авторизация.';
}
// Forbidden
if (err.status === 403) {
return 'Доступ запрещен.';
}
// Not found
if (err.status === 404) {
return 'Не найдено.';
}
// Conflict (e.g., duplicate entry)
if (err.status === 409) {
return 'Объект уже существует или был модифицирован.';
}
// Validation error
if (err.status === 422) {
return this.extractValidationMessage(err) || 'Ошибка валидации.';
}
// Rate limiting
if (err.status === 429) {
return 'Слишком много запросов. Подождите и повторите запрос позже.';
}
// Server errors
if (err.status >= 500) {
return 'Ошибка на сервере. Попробуйте позже.';
}
// Try to extract backend message for other errors
const backendMessage = this.extractBackendMessage(err);
if (backendMessage) {
return backendMessage;
}
return 'Неожиданная ошибка.';
}
/**
* Attempts to extract a message from the backend response.
* Override for custom API response structures.
*/
protected extractBackendMessage(err: HttpErrorResponse): string | undefined {
const error = err.error;
// Handle common API response structures
if (typeof error === 'object' && error) {
// { message: "..." }
if ('message' in error && typeof error.message === 'string' && error.message.length > 0) {
return error.message;
}
// { error: "..." }
Eif ('error' in error && typeof error.error === 'string' && error.error.length > 0) {
return error.error;
}
}
// Handle plain string error
if (typeof error === 'string' && error.length > 0 && error.length < 200) {
return error;
}
return undefined;
}
/**
* Extracts validation error details for 422 responses.
*/
protected extractValidationMessage(err: HttpErrorResponse): string | undefined {
const error = err.error;
if (typeof error === 'object' && error) {
Eif ('errors' in error) {
const errors = error.errors;
if (Array.isArray(errors) && errors.length > 0 && typeof errors[0] === 'string') {
return errors[0];
}
Eif (typeof errors === 'object' && errors) {
const firstField = Object.keys(errors)[0];
Eif (firstField) {
const fieldErrors = (errors as Record<string, unknown>)[firstField];
Eif (Array.isArray(fieldErrors) && fieldErrors.length > 0) {
const firstFieldError = fieldErrors[0];
Eif (typeof firstFieldError === 'string' && firstFieldError.length > 0) {
return `${firstField}: ${firstFieldError}`;
}
}
}
}
}
}
return this.extractBackendMessage(err);
}
}
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