export function findDateFormat()

in src/formatting.ts [44:90]

• 40 lines of code
• 14 McCabe index (conditional complexity)

export function findDateFormat(value: Date, format: string, cultureName: string): DateFormat {
    switch (format) {
        case "m":
            // Month + day
            format = "M";
            break;
        case "O":
        case "o":
            // Roundtrip
            format = "yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'fff'0000'";
            break;
        case "R":
        case "r":
            // RFC1123 pattern - - time must be converted to UTC before formatting
            value = new Date(value.getUTCFullYear(), value.getUTCMonth(), value.getUTCDate(), value.getUTCHours(), value.getUTCMinutes(), value.getUTCSeconds(), value.getUTCMilliseconds());
            format = "ddd, dd MMM yyyy HH':'mm':'ss 'GMT'";
            break;
        case "s":
            // Sortable - should use invariant culture
            format = "S";
            break;
        case "u":
            // Universal sortable - should convert to UTC before applying the "yyyy'-'MM'-'dd HH':'mm':'ss'Z' format.
            value = new Date(value.getUTCFullYear(), value.getUTCMonth(), value.getUTCDate(), value.getUTCHours(), value.getUTCMinutes(), value.getUTCSeconds(), value.getUTCMilliseconds());
            format = "yyyy'-'MM'-'dd HH':'mm':'ss'Z'";
            break;
        case "U":
            // Universal full - the pattern is same as F but the time must be converted to UTC before formatting
            value = new Date(value.getUTCFullYear(), value.getUTCMonth(), value.getUTCDate(), value.getUTCHours(), value.getUTCMinutes(), value.getUTCSeconds(), value.getUTCMilliseconds());
            format = "F";
            break;
        case "y":
        case "Y":
            // Year and month
            switch (cultureName) {
                case "default":
                case "en":
                case "en-US":
                    format = "MMMM, yyyy"; // Fix the default year-month pattern for english
                    break;
                default:
                    format = "Y"; // For other cultures - use the localized pattern
            }
            break;
    }
    return { value: value, format: format };
}