import Mime from "@effect/platform-node/Mime"; export const IMAGE_EXTENSION_BY_MIME_TYPE: Record<string, string> = { "image/avif": ".avif", "image/bmp": ".bmp", "image/gif": ".gif", "image/heic": ".heic", "image/heif": ".heif", "image/jpeg": ".jpg", "image/jpg": ".jpg", "image/png": ".png", "image/svg+xml": ".svg", "image/tiff": ".tiff", "image/webp": ".webp",}; export const SAFE_IMAGE_FILE_EXTENSIONS = new Set([ ".avif", ".bmp", ".gif", ".heic", ".heif", ".ico", ".jpeg", ".jpg", ".png", ".svg", ".tiff", ".webp",]); export function parseBase64DataUrl( dataUrl: string,): { readonly mimeType: string; readonly base64: string } | null { const match = /^data:([^,]+),([a-z0-9+/=\r\n ]+)$/i.exec(dataUrl.trim()); if (!match) return null; const headerParts = (match[1] ?? "") .split(";") .map((part) => part.trim()) .filter((part) => part.length > 0); if (headerParts.length < 2) { return null; } const trailingToken = headerParts.at(-1)?.toLowerCase(); if (trailingToken !== "base64") { return null; } const mimeType = headerParts[0]?.toLowerCase(); const base64 = match[2]?.replace(/\s+/g, ""); if (!mimeType || !base64) return null; return { mimeType, base64 };} export function inferImageExtension(input: { mimeType: string; fileName?: string }): string { const key = input.mimeType.toLowerCase(); const fromMime = Object.hasOwn(IMAGE_EXTENSION_BY_MIME_TYPE, key) ? IMAGE_EXTENSION_BY_MIME_TYPE[key] : undefined; if (fromMime) { return fromMime; } const fromMimeExtension = Mime.getExtension(input.mimeType); if (fromMimeExtension && SAFE_IMAGE_FILE_EXTENSIONS.has(fromMimeExtension)) { return fromMimeExtension; } const fileName = input.fileName?.trim() ?? ""; const extensionMatch = /\.([a-z0-9]{1,8})$/i.exec(fileName); const fileNameExtension = extensionMatch ? `.${extensionMatch[1]!.toLowerCase()}` : ""; if (SAFE_IMAGE_FILE_EXTENSIONS.has(fileNameExtension)) { return fileNameExtension; } return ".bin";}
import Mime from "@effect/platform-node/Mime";
export const IMAGE_EXTENSION_BY_MIME_TYPE: Record<string, string> = {
"image/avif": ".avif",
"image/bmp": ".bmp",
"image/gif": ".gif",
"image/heic": ".heic",
"image/heif": ".heif",
"image/jpeg": ".jpg",
"image/jpg": ".jpg",
"image/png": ".png",
"image/svg+xml": ".svg",
"image/tiff": ".tiff",
"image/webp": ".webp",
};
export const SAFE_IMAGE_FILE_EXTENSIONS = new Set([
".avif",
".bmp",
".gif",
".heic",
".heif",
".ico",
".jpeg",
".jpg",
".png",
".svg",
".tiff",
".webp",
]);
export function parseBase64DataUrl(
dataUrl: string,
): { readonly mimeType: string; readonly base64: string } | null {
const match = /^data:([^,]+),([a-z0-9+/=\r\n ]+)$/i.exec(dataUrl.trim());
if (!match) return null;
const headerParts = (match[1] ?? "")
.split(";")
.map((part) => part.trim())
.filter((part) => part.length > 0);
if (headerParts.length < 2) {
return null;
}
const trailingToken = headerParts.at(-1)?.toLowerCase();
if (trailingToken !== "base64") {
return null;
}
const mimeType = headerParts[0]?.toLowerCase();
const base64 = match[2]?.replace(/\s+/g, "");
if (!mimeType || !base64) return null;
return { mimeType, base64 };
}
export function inferImageExtension(input: { mimeType: string; fileName?: string }): string {
const key = input.mimeType.toLowerCase();
const fromMime = Object.hasOwn(IMAGE_EXTENSION_BY_MIME_TYPE, key)
? IMAGE_EXTENSION_BY_MIME_TYPE[key]
: undefined;
if (fromMime) {
return fromMime;
}
const fromMimeExtension = Mime.getExtension(input.mimeType);
if (fromMimeExtension && SAFE_IMAGE_FILE_EXTENSIONS.has(fromMimeExtension)) {
return fromMimeExtension;
}
const fileName = input.fileName?.trim() ?? "";
const extensionMatch = /\.([a-z0-9]{1,8})$/i.exec(fileName);
const fileNameExtension = extensionMatch ? `.${extensionMatch[1]!.toLowerCase()}` : "";
if (SAFE_IMAGE_FILE_EXTENSIONS.has(fileNameExtension)) {
return fileNameExtension;
}
return ".bin";
}