Function discardChanges

source/features/restore-file.tsx:46–98

(
	progress: (message: string) => void,
	originalFileName: string,
	newFileName: string,
	headline: string,
)

}

async function discardChanges(
	progress: (message: string) => void,
	originalFileName: string,
	newFileName: string,
	headline: string,
): Promise<void> {
	const [headReference, file] = await Promise.all([
		getHeadReference(),
		getFile(originalFileName),
	]);

	const isNewFile = file === undefined;
	const isRenamed = originalFileName !== newFileName;

	const contents = file ?? '';
	const newFileDeletion = {deletions: [{path: newFileName}]};
	const restoreOldFile = {additions: [{path: originalFileName, contents}]};
	const fileChanges = isRenamed
		? {...restoreOldFile, ...newFileDeletion} // Renamed, maybe also changed
		: isNewFile
			? newFileDeletion // New
			: restoreOldFile; // Changes

	const {nameWithOwner, branch: prBranch} = getBranches().head;
	progress('Committing…');

	await api.v4(
		`
		mutation discardChanges ($input: CreateCommitOnBranchInput!) {
			createCommitOnBranch(input: $input) {
				commit {
					oid
				}
			}
		}
	`,
		{
			variables: {
				input: {
					branch: {
						repositoryNameWithOwner: nameWithOwner,
						branchName: prBranch,
					},
					expectedHeadOid: headReference,
					fileChanges,
					message: {
						headline,
					},
				},
			},
		},
	);
}

function getFilenames(menuItem: HTMLElement): {original: string; new: string} {
	// Legacy view: get filenames from the data-path and Link--primary elements