54 lines
1.3 KiB
TypeScript
54 lines
1.3 KiB
TypeScript
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import { isRecord } from "../utils/isRecord";
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import { CONTENT_TYPE_HEADER, CONTENT_TYPE_JSON } from "./constants";
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export class ApiError extends Error {}
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export async function parseResponse<T>(response: Response): Promise<T> {
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const contentType = response.headers.get(CONTENT_TYPE_HEADER);
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const isJSON = contentType ? contentType.includes(CONTENT_TYPE_JSON) : false;
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if (!isJSON) {
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throw new Error(
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`Expected response to have a JSON content type, got '${contentType}' instead.`
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);
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}
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const data = await parseJSON(response);
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if (!response.ok) {
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throw new ApiError(getErrorMessage(data));
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}
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return data as T;
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}
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async function parseJSON(response: Response): Promise<unknown> {
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try {
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return await response.json();
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} catch (error) {
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throw new Error("Unable to parse response as valid JSON.", {
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cause: error,
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});
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}
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}
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function getErrorMessage(data: unknown): string {
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if (!isRecord(data)) {
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throw new Error("Unable to retrieve error message from response.");
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}
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const errorKeys = ["error_description", "errorMessage", "error"];
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for (const key of errorKeys) {
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const value = data[key];
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if (typeof value === "string") {
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return value;
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}
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}
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throw new Error(
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"Unable to retrieve error message from response, no matching key found."
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);
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}
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