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import { config } from "./config.ts";
import { logger } from "./logger.ts";
export async function ensureUploadDir() {
try {
await Deno.mkdir(config.uploadDir, { recursive: true });
} catch (error) {
if (!(error instanceof Deno.errors.AlreadyExists)) {
throw error;
}
}
}
export async function getUniqueFilename(filename: string): Promise<string> {
const filepath = `${config.uploadDir}/${filename}`;
try {
await Deno.stat(filepath);
// File exists, append epoch seconds
const epoch = Math.floor(Date.now() / 1000);
const parts = filename.split(".");
if (parts.length > 1) {
const ext = parts.pop();
return `${parts.join(".")}_${epoch}.${ext}`;
}
return `${filename}_${epoch}`;
} catch (error) {
if (error instanceof Deno.errors.NotFound) {
return filename;
}
throw error;
}
}
export async function listUploadedFiles() {
const files: Array<{ name: string; size: number; uploaded: Date }> = [];
try {
for await (const entry of Deno.readDir(config.uploadDir)) {
if (entry.isFile) {
const stat = await Deno.stat(`${config.uploadDir}/${entry.name}`);
files.push({
name: entry.name,
size: stat.size,
uploaded: stat.mtime || new Date(),
});
}
}
} catch (error) {
if (!(error instanceof Deno.errors.NotFound)) {
logger.server("ERROR", "Error listing files", { error: String(error) });
}
}
return files.sort((a, b) => b.uploaded.getTime() - a.uploaded.getTime());
}
export async function cleanupExpiredFiles() {
if (config.fileExpiration === 0) return;
const now = Date.now();
let cleaned = 0;
try {
for await (const entry of Deno.readDir(config.uploadDir)) {
if (entry.isFile) {
const filepath = `${config.uploadDir}/${entry.name}`;
const stat = await Deno.stat(filepath);
const age = now - (stat.mtime?.getTime() || 0);
if (age > config.fileExpiration) {
await Deno.remove(filepath);
cleaned++;
logger.cleanup("INFO", "Expired file removed", { filename: entry.name, ageMs: age });
}
}
}
} catch (error) {
logger.cleanup("ERROR", "Error during file cleanup", { error: String(error) });
}
if (cleaned > 0) {
logger.cleanup("INFO", "File cleanup completed", { filesRemoved: cleaned });
}
}
// Run cleanup every hour
setInterval(() => cleanupExpiredFiles(), 60 * 60 * 1000);
export function isAllowedFileType(contentType: string): boolean {
if (config.allowedFileTypes.includes("*/*")) {
return true;
}
return config.allowedFileTypes.includes(contentType);
}
export function formatFileSize(bytes: number): string {
if (bytes === 0) return "0 Bytes";
const k = 1024;
const sizes = ["Bytes", "KB", "MB", "GB"];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return Math.round((bytes / Math.pow(k, i)) * 100) / 100 + " " + sizes[i];
}
export function getMimeType(filename: string): string {
const ext = filename.split(".").pop()?.toLowerCase();
const mimeTypes: Record<string, string> = {
// Images
"jpg": "image/jpeg",
"jpeg": "image/jpeg",
"png": "image/png",
"gif": "image/gif",
"webp": "image/webp",
"svg": "image/svg+xml",
"bmp": "image/bmp",
"ico": "image/x-icon",
// Videos
"mp4": "video/mp4",
"webm": "video/webm",
"ogv": "video/ogg",
"avi": "video/x-msvideo",
"mov": "video/quicktime",
"mkv": "video/x-matroska",
"m4v": "video/x-m4v",
"mpeg": "video/mpeg",
"mpg": "video/mpeg",
// Audio
"mp3": "audio/mpeg",
"wav": "audio/wav",
"ogg": "audio/ogg",
"m4a": "audio/mp4",
"flac": "audio/flac",
// Documents
"pdf": "application/pdf",
"txt": "text/plain",
"html": "text/html",
"css": "text/css",
"js": "application/javascript",
"json": "application/json",
// Archives
"zip": "application/zip",
"tar": "application/x-tar",
"gz": "application/gzip",
};
return mimeTypes[ext || ""] || "application/octet-stream";
}
export function isViewableInBrowser(mimeType: string): boolean {
return mimeType.startsWith("image/") ||
mimeType.startsWith("video/") ||
mimeType.startsWith("audio/") ||
mimeType === "application/pdf" ||
mimeType === "text/plain";
}
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