export const validTagMatcher = new RegExp(/^[\p{L}\p{N}_]+$/u)

// Format user input for api requests, returns an empty string if invalid
export function formatTagInput(str: string): string | false {
    const normal = str.trim().toLowerCase().replaceAll(/\s\s+/g, ' ').replaceAll(' ', '_')

    if (!validTagMatcher.test(normal)) {
        return false
    }
    return normal
}

// Format tag label for display in html
export function formatTagTextContent(str: string): string {
    return str.trim().toUpperCase().replace('_', ' ')
}

// Format tag usage for display in html
export function formatTagUsage(num: number): string {
    return num.toLocaleString()
}