61 lines
2.0 KiB
TypeScript
61 lines
2.0 KiB
TypeScript
export const MAX_IMAGE_BYTES = 10 * 1024 * 1024
|
|
|
|
export const ALLOWED_IMAGE_MIME_TYPES = ['image/png', 'image/jpeg', 'image/webp', 'image/svg+xml']
|
|
|
|
export const ALLOWED_IMAGE_EXTENSIONS = ['.png', '.jpg', '.jpeg', '.webp', '.svg']
|
|
|
|
export const IMAGE_TYPE_REJECTION_TEXT = 'Use a PNG, JPEG, WEBP or SVG image, up to 10 MB.'
|
|
|
|
export type ImageRejectionKind = 'type' | 'size'
|
|
|
|
export type ImageValidationResult = { ok: true } | { ok: false; kind: ImageRejectionKind }
|
|
|
|
export function fileExtension(filename: string) {
|
|
const index = filename.lastIndexOf('.')
|
|
return index === -1 ? '' : filename.slice(index).toLowerCase()
|
|
}
|
|
|
|
export function validateImageFile(file: File): ImageValidationResult {
|
|
if (file.size > MAX_IMAGE_BYTES) {
|
|
return { ok: false, kind: 'size' }
|
|
}
|
|
const typeAllowed = ALLOWED_IMAGE_MIME_TYPES.includes(file.type)
|
|
const extensionAllowed = ALLOWED_IMAGE_EXTENSIONS.includes(fileExtension(file.name))
|
|
if (!typeAllowed || !extensionAllowed) {
|
|
return { ok: false, kind: 'type' }
|
|
}
|
|
return { ok: true }
|
|
}
|
|
|
|
export function formatMegabytes(bytes: number) {
|
|
return (bytes / (1024 * 1024)).toFixed(1)
|
|
}
|
|
|
|
export function isSizeRejectionBody(body: string) {
|
|
return body.toLowerCase().includes('exceed')
|
|
}
|
|
|
|
export function rejectionTitle(filename: string) {
|
|
return `"${filename}" can't be used`
|
|
}
|
|
|
|
export function sizeRejectionText(filename: string, bytes: number) {
|
|
return `${filename} is ${formatMegabytes(bytes)} MB. Images can be up to 10 MB.`
|
|
}
|
|
|
|
export function formatWholeKB(bytes: number): string {
|
|
const kb = bytes / 1024
|
|
const rounded = Math.round(kb * 10) / 10
|
|
if (rounded === 0) {
|
|
return '0.0'
|
|
}
|
|
return Number.isInteger(rounded) ? String(rounded) : rounded.toFixed(1)
|
|
}
|
|
|
|
export function formatUploadProgress(loadedBytes: number, totalBytes: number): string {
|
|
if (totalBytes < 1024 * 1024) {
|
|
return `Uploading ${formatWholeKB(loadedBytes)} of ${formatWholeKB(totalBytes)} KB`
|
|
}
|
|
return `Uploading ${formatMegabytes(loadedBytes)} of ${formatMegabytes(totalBytes)} MB`
|
|
}
|