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refactor: simplify letterlogic by removing object mutation

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ramvignesh-b
2026-04-29 23:09:32 +05:30
parent b9716d368d
commit df96cead93
5 changed files with 266 additions and 164 deletions
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frontend/src/pages/Editor.tsx
+70 -42
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@@ -33,11 +33,12 @@ import { CryptoUtils } from "../utils/crypto";
import { formatRelativeDate } from "../utils/dateFormat";
import { decryptCanvasImages, encryptCanvasImages } from "../utils/letterLogic";
type SaveOverlay = "idle" | "saving" | "saved" | "error";
type SaveOverlay = "IDLE" | "SAVING" | "SAVED" | "ERROR";
const OVERLAY_FADE_MS = 250;
const SAVED_VISIBLE_MS = 1400;
const ERROR_VISIBLE_MS = 2400;
const STOP_SAVE_DATE_PULSE_AFTER_MS = 10000;
const toPlaceholderList = [
"Someone dear...",
@@ -45,6 +46,7 @@ const toPlaceholderList = [
"Something to bear...",
];
const MAX_FILE_SIZE = 10 * 1024 * 1024;
export default function Editor() {
const navigate = useNavigate();
const navigateRef = useRef<NavigateFunction>(navigate);
@@ -70,7 +72,14 @@ export default function Editor() {
const [lastSavedPulseTick, setLastSavedPulseTick] = useState(0);
const [sealBtnClicked, setSealBtnClicked] = useState<boolean>(false);
const [saveOverlay, setSaveOverlay] = useState<SaveOverlay>("idle");
const [saveOverlay, setSaveOverlay] = useState<SaveOverlay>("IDLE");
const [logStatus, setLogStatus] = useState<{
status: "WARN" | "ERROR" | "RESET";
message: string;
}>({
status: "RESET",
message: "",
});
const [showSaveOverlay, setShowSaveOverlay] = useState(false);
const [confirmModal, setConfirmModal] = useState<"VAULT" | "SEAL" | null>(
null,
@@ -85,7 +94,7 @@ export default function Editor() {
const canvasRef = useRef<CanvasTools>(null);
const fileInputRef = useRef<HTMLInputElement>(null);
// Placeholder rotation
// to continuously rotate placeholder text of the recipient input
useEffect(() => {
const interval = setInterval(() => {
setPlaceholderIndex((prev) => (prev + 1) % toPlaceholderList.length);
@@ -94,13 +103,14 @@ export default function Editor() {
return () => clearInterval(interval);
}, []);
// to load existing letter when public_id param and masterKey is available
// NOTE: this has to trigger just once after each save
useEffect(() => {
if (!(public_id && masterKey)) return;
if (justSavedRef.current) {
justSavedRef.current = false;
return;
}
const loadExistingLetter = async () => {
setIsInitialLoading(true);
const cryptoUtils = new CryptoUtils();
@@ -139,26 +149,27 @@ export default function Editor() {
);
const canvasData = JSON.parse(decryptedJsonStr);
const { isDecryptionPartialFailure, error } = await decryptCanvasImages(
canvasData,
letterData.images ?? [],
letterData.encrypted_dek,
masterKey,
cryptoUtils,
true,
);
const { errors, isPartialFailure, canvasDataWithDecryptedImages } =
await decryptCanvasImages(
canvasData,
letterData.images ?? [],
letterData.encrypted_dek,
masterKey,
cryptoUtils,
true,
);
if (isDecryptionPartialFailure) {
if (isPartialFailure) {
setDecryptionStatus({
status: "WARN",
message:
"Failed to decrypt some elements. Please check the render.",
log: error,
log: errors.toString(),
});
}
if (canvasRef.current) {
await canvasRef.current.loadData(canvasData);
await canvasRef.current.loadData(canvasDataWithDecryptedImages);
}
} catch (_err) {
setDecryptionStatus({
@@ -170,37 +181,36 @@ export default function Editor() {
setIsInitialLoading(false);
}
};
loadExistingLetter();
}, [public_id, masterKey]);
// to trigger short pulse animation for Last Saved AT element
useEffect(() => {
if (lastSavedPulseTick === 0) return;
setIsSaveDatePulsing(true);
const timer = setTimeout(() => {
setIsSaveDatePulsing(false);
}, 10000);
}, STOP_SAVE_DATE_PULSE_AFTER_MS);
return () => clearTimeout(timer);
}, [lastSavedPulseTick]);
// to fade in and fade out the save status overlay after each save operation
// Note: otherwise the fade efect is abrupt due to component's immediate unmount
useEffect(() => {
if (saveOverlay === "idle" || saveOverlay === "saving") return;
if (saveOverlay === "IDLE" || saveOverlay === "SAVING") return;
const visibleTimer = setTimeout(
() => {
setShowSaveOverlay(false);
},
saveOverlay === "saved" ? SAVED_VISIBLE_MS : ERROR_VISIBLE_MS,
saveOverlay === "SAVED" ? SAVED_VISIBLE_MS : ERROR_VISIBLE_MS,
);
const unmountTimer = setTimeout(
() => {
setSaveOverlay("idle");
setSaveOverlay("IDLE");
},
(saveOverlay === "saved" ? SAVED_VISIBLE_MS : ERROR_VISIBLE_MS) +
(saveOverlay === "SAVED" ? SAVED_VISIBLE_MS : ERROR_VISIBLE_MS) +
OVERLAY_FADE_MS,
);
@@ -212,9 +222,14 @@ export default function Editor() {
const handleImageUpload = (e: React.ChangeEvent<HTMLInputElement>) => {
const file = e.target.files?.[0];
if (file) {
if (file && file.size < MAX_FILE_SIZE) {
const url = URL.createObjectURL(file);
canvasRef.current?.addImage(url, file);
} else {
setLogStatus({
status: "WARN",
message: "Please upload images with size less than 10MB.",
});
}
};
@@ -229,9 +244,9 @@ export default function Editor() {
targetId = crypto.randomUUID();
}
if (saveOverlay === "saving" || !masterKey) return;
if (saveOverlay === "SAVING" || !masterKey) return;
setSaveOverlay("saving");
setSaveOverlay("SAVING");
setShowSaveOverlay(true);
const cryptoUtils = new CryptoUtils();
@@ -241,15 +256,16 @@ export default function Editor() {
const canvasData = canvasRef.current?.getData() || { objects: [] };
const canvasImages = canvasRef.current?.getImages() || [];
const encImageFilesMap = await encryptCanvasImages(
canvasData,
canvasImages,
masterKey,
cryptoUtils,
);
const { encryptedImageFiles, encryptedCanvasData } =
await encryptCanvasImages(
canvasData,
canvasImages,
masterKey,
cryptoUtils,
);
const encrypted_letter = await cryptoUtils.encryptLetter(
JSON.stringify(canvasData),
JSON.stringify(encryptedCanvasData),
masterKey,
);
@@ -278,7 +294,7 @@ export default function Editor() {
encrypted_metadata.encrypted_content,
);
encImageFilesMap.forEach((blob, filename) => {
encryptedImageFiles.forEach((blob, filename) => {
formData.append("image_files", blob, filename);
});
@@ -297,10 +313,10 @@ export default function Editor() {
if (status === "SEALED" || status === "VAULT") {
setSealedTargetId(targetId);
}
setSaveOverlay("saved");
setSaveOverlay("SAVED");
setShowSaveOverlay(true);
} catch (_error) {
setSaveOverlay("error");
setSaveOverlay("ERROR");
setShowSaveOverlay(true);
}
};
@@ -356,9 +372,9 @@ export default function Editor() {
</div>
)}
{saveOverlay !== "idle" && (
{saveOverlay !== "IDLE" && (
<Modal isOpen={showSaveOverlay}>
{saveOverlay === "saving" && (
{saveOverlay === "SAVING" && (
<div
role="alert"
className={`alert text-center alert-neutral shadow-lg transition-all ease-in-out duration-2000 ${
@@ -376,7 +392,7 @@ export default function Editor() {
</div>
)}
{saveOverlay === "saved" && (
{saveOverlay === "SAVED" && (
<div
role="alert"
className={`alert alert-success shadow-lg transition-all ease-in-out duration-2000 ${
@@ -390,7 +406,7 @@ export default function Editor() {
</div>
)}
{saveOverlay === "error" && (
{saveOverlay === "ERROR" && (
<div
role="alert"
className={`alert alert-error shadow-lg transition-all duration-300 ${
@@ -426,7 +442,7 @@ export default function Editor() {
<div className="flex flex-col gap-2 flex-1">
<label
htmlFor="recipient"
className="text-[10px] uppercase tracking-[0.4em] text-secondary-content font-bold"
className="text-xs uppercase tracking-[0.4em] text-secondary-content font-bold"
>
Recipient
</label>
@@ -466,6 +482,18 @@ export default function Editor() {
<ComposeCanvas ref={canvasRef} readOnly={status !== "DRAFT"} />
</div>
</section>
<LogModal
status={logStatus.status}
message={logStatus.message}
log={""}
onClose={() =>
setLogStatus({
status: "RESET",
message: "",
})
}
isOpen={logStatus.status !== "RESET"}
/>
</>
);
}