Resolve a Git Branch to a Xata branch

//native

type Xata = {

	apiKey: string

	workspaceUrl: string

}

/**

 * Resolve a Git Branch to a Xata branch

 * In order to resolve the database branch, the following algorithm is used:

* if the `gitBranch` was provided and is found in the git branches mapping, the associated Xata branch is returned

* else, if a Xata branch with the exact same name as `gitBranch` exists, return it

* else, if `fallbackBranch` is provided and a branch with that name exists, return it

* else, return the default branch of the DB (`main` or the first branch)

Example call:

```json

// GET https://tutorial-ng7s8c.

 */

export async function main(

	auth: Xata,

	db_name: string,

	gitBranch: string | undefined,

	fallbackBranch: string | undefined

) {

	const url = new URL(`${auth.workspaceUrl}/dbs/${db_name}/resolveBranch`)

	for (const [k, v] of [

		['gitBranch', gitBranch],

		['fallbackBranch', fallbackBranch]

	]) {

		if (v !== undefined && v !== '' && k !== undefined) {

			url.searchParams.append(k, v)

		}

	}

	const response = await fetch(url, {

		method: 'GET',

		headers: {

			Authorization: 'Bearer ' + auth.apiKey

		},

		body: undefined

	})

	if (!response.ok) {

		const text = await response.text()

		throw new Error(`${response.status} ${text}`)

	}

	return await response.json()

}