@prismicio/client/src/getGraphQLEndpoint.ts

The official JavaScript + TypeScript client library for Prismic

import { PrismicError } from "./errors/PrismicError"

import { isRepositoryName } from "./isRepositoryName"

/**
 * Get a repository's Prismic GraphQL endpoint.
 *
 * @typeParam RepositoryName - Name of the Prismic repository.
 *
 * @param repositoryName - Name of the repository.
 *
 * @returns The repository's Prismic REST API V2 endpoint
 */
export const getGraphQLEndpoint = <RepositoryName extends string>(
	repositoryName: RepositoryName,
): `https://${RepositoryName}.cdn.prismic.io/graphql` => {
	if (isRepositoryName(repositoryName)) {
		return `https://${repositoryName}.cdn.prismic.io/graphql` as const
	} else {
		throw new PrismicError(
			`An invalid Prismic repository name was given: ${repositoryName}`,
			undefined,
			undefined,
		)
	}
}