Lots of new features

See release for more info

static/js/fileops.js

@@ -0,0 +1,92 @@
+// fileops.js
+
+import { encryptAdvanced, decryptAdvanced } from './encryption.js';
+
+/**
+ * Encrypts the selected file and triggers download of the encrypted version.
+ * @param {HTMLInputElement} fileInput - The input element of type 'file'.
+ * @param {string} password - Password for encryption.
+ */
+export function encryptFile(fileInput, password) {
+    if (!fileInput.files.length) {
+        alert("Please select a file!");
+        return;
+    }
+
+    const file = fileInput.files[0];
+    const reader = new FileReader();
+
+    reader.onload = async (e) => {
+        const rawBytes = new Uint8Array(e.target.result);
+        const base64 = btoa(String.fromCharCode(...rawBytes));
+        const encrypted = await encryptAdvanced(base64, password);
+        downloadFile(encrypted, file.name + ".enc");
+    };
+
+    reader.readAsArrayBuffer(file);
+}
+
+/**
+ * Decrypts the selected encrypted file and triggers download of the original.
+ * @param {HTMLInputElement} fileInput - The input element of type 'file'.
+ * @param {string} password - Password for decryption.
+ */
+export function decryptFile(fileInput, password) {
+    if (!fileInput.files.length) {
+        alert("Please select a file!");
+        return;
+    }
+
+    const file = fileInput.files[0];
+    const reader = new FileReader();
+
+    reader.onload = async (e) => {
+        try {
+            const encryptedText = e.target.result;
+            const base64Decrypted = await decryptAdvanced(encryptedText, password);
+            const byteArray = new Uint8Array(
+                [...atob(base64Decrypted)].map(c => c.charCodeAt(0))
+            );
+            downloadFileBinary(byteArray, file.name.replace(/\.enc$/, ''));
+        } catch (err) {
+            console.error("[Decryption Error]", err);
+            alert("Decryption failed: wrong password or corrupted file.");
+        }
+    };
+
+    reader.readAsText(file);
+}
+
+/**
+ * Downloads a text-based file (encrypted string).
+ * @param {string} content - The file content to download.
+ * @param {string} filename - Desired name for the downloaded file.
+ */
+function downloadFile(content, filename) {
+    const blob = new Blob([content], { type: "application/octet-stream" });
+    const url = URL.createObjectURL(blob);
+
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = filename;
+    a.click();
+
+    URL.revokeObjectURL(url);
+}
+
+/**
+ * Downloads a binary file (Uint8Array).
+ * @param {Uint8Array} byteArray - The binary content.
+ * @param {string} filename - Desired name for the downloaded file.
+ */
+function downloadFileBinary(byteArray, filename) {
+    const blob = new Blob([byteArray], { type: "application/octet-stream" });
+    const url = URL.createObjectURL(blob);
+
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = filename;
+    a.click();
+
+    URL.revokeObjectURL(url);
+}