37 lines
951 B
TypeScript
37 lines
951 B
TypeScript
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/** Backend error JSON from API `handleError` responses (also carried as thrown `ApiError.message` on 4xx). */
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export type ApiErrorBody = {
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success: false;
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error: string;
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code: string;
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field?: string;
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};
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/**
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* Parses `this.error` / ApiError.message when the API returned a JSON body with `success: false`.
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*/
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export function tryParseApiErrorBody(raw: string | null | undefined): ApiErrorBody | null {
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if (!raw?.trim()) {
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return null;
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}
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try {
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const parsed = JSON.parse(raw) as unknown;
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if (
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typeof parsed === 'object' &&
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parsed !== null &&
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'success' in parsed &&
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(parsed as { success: unknown }).success === false &&
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'code' in parsed &&
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typeof (parsed as { code: unknown }).code === 'string' &&
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'error' in parsed &&
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typeof (parsed as { error: unknown }).error === 'string'
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) {
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return parsed as ApiErrorBody;
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}
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} catch {
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// not JSON
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}
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return null;
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}
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