Function parseTemporalDate

packages/web/src/features/git/dateUtils.ts:21–101

(dateStr: string | undefined)

 * parseTemporalDate(undefined) // undefined
 */
export function parseTemporalDate(dateStr: string | undefined): string | undefined {
    if (!dateStr) {
        return undefined;
    }

    // Try parsing as ISO date first
    const isoDate = new Date(dateStr);
    if (!isNaN(isoDate.getTime())) {
        return isoDate.toISOString();
    }

    // Parse relative dates (Git-compatible format)
    // Git accepts these natively, but we normalize to ISO for consistency
    const lowerStr = dateStr.toLowerCase().trim();

    // Handle "yesterday"
    if (lowerStr === 'yesterday') {
        const date = new Date();
        date.setDate(date.getDate() - 1);
        return date.toISOString();
    }

    // Handle "N <unit>s ago" format
    const matchRelative = lowerStr.match(/^(\d+)\s+(second|minute|hour|day|week|month|year)s?\s+ago$/i);
    if (matchRelative) {
        const amount = parseInt(matchRelative[1]);
        const unit = matchRelative[2].toLowerCase();
        const date = new Date();

        switch (unit) {
            case 'second':
                date.setSeconds(date.getSeconds() - amount);
                break;
            case 'minute':
                date.setMinutes(date.getMinutes() - amount);
                break;
            case 'hour':
                date.setHours(date.getHours() - amount);
                break;
            case 'day':
                date.setDate(date.getDate() - amount);
                break;
            case 'week':
                date.setDate(date.getDate() - (amount * 7));
                break;
            case 'month':
                date.setMonth(date.getMonth() - amount);
                break;
            case 'year':
                date.setFullYear(date.getFullYear() - amount);
                break;
        }

        return date.toISOString();
    }

    // Handle "last <unit>" format
    const matchLast = lowerStr.match(/^last\s+(week|month|year)$/i);