export function GetIssueReadingTimestamp(issueId: number): number {
	const value = window.localStorage.getItem(getKey(issueId));
	return value ? Number(value) : 0;
}

export function SetIssueReadingTimestamp(issueId: number): number {
	const now = (new Date()).getTime();
	window.localStorage.setItem(getKey(issueId), String(now));
	return now;
}

export function SetIssuesReadingTimestamp(issueIds: number[]): number {
	const now = (new Date()).getTime();
	for (let i = 0; i < issueIds.length; i++) {
		const issueId = issueIds[i];
		window.localStorage.setItem(getKey(issueId), String(now));
	}
	return now;
}

function getKey(issueId: number): string {
	return `issue_read_${issueId}`;
}