libredesk/frontend/shared-ui/utils/file.js

export function formatBytes (bytes) {
    if (bytes < 1024 * 1024) {
        return (bytes / 1024).toFixed(2) + ' KB'
    } else {
        return (bytes / (1024 * 1024)).toFixed(2) + ' MB'
    }
}

const UUID_V4_RE = /[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}/i

export function getThumbFilepath (url) {
    if (!url) return url
    const match = url.match(UUID_V4_RE)
    if (!match) return url
    const qIdx = url.indexOf('?')
    const query = qIdx >= 0 ? url.substring(qIdx) : ''
    return `/uploads/thumb_${match[0]}${query}`
}

export function downloadUrl (url) {
    if (!url) return url
    const match = url.match(UUID_V4_RE)
    if (!match) return url
    return `/uploads/${match[0]}?download=1`
}

export function downloadBlobResponse (response, filename) {
    const url = URL.createObjectURL(response.data)
    const link = document.createElement('a')
    link.href = url
    link.download = filename
    document.body.appendChild(link)
    link.click()
    link.remove()
    // Revoking in the same tick cancels the in-flight download in Firefox/Safari.
    setTimeout(() => URL.revokeObjectURL(url), 0)
}

// Blob error bodies (from responseType: 'blob' requests) hide the JSON envelope; parse it in place so the HTTP error handler can read it.
export async function parseBlobError (err) {
    if (err.response?.data instanceof Blob) {
        try {
            err.response.data = JSON.parse(await err.response.data.text())
        } catch {
            // keep the original blob; the error handler falls back to a generic message
        }
    }
    return err
}