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6.26.0/browserstate/Index.svelte

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+<script lang="ts">
+	import { onMount } from "svelte";
+	import { encrypt, decrypt } from "./crypto";
+	import { Gradio } from "@gradio/utils";
+
+	let props = $props();
+	let gradio = new Gradio<
+		{
+			change: never;
+		},
+		{
+			storage_key: string;
+			secret: string;
+			default_value: any;
+			value: any;
+		}
+	>(props);
+
+	function load_value(): void {
+		const stored = localStorage.getItem(gradio.props.storage_key);
+		if (!stored) {
+			gradio.props.value = gradio.props.default_value;
+			return;
+		}
+		try {
+			const decrypted = decrypt(stored, gradio.props.secret);
+			gradio.props.value = JSON.parse(decrypted);
+		} catch (e) {
+			console.error("Error reading from localStorage:", e);
+			gradio.props.value = gradio.props.default_value;
+		}
+	}
+
+	function save_value(value: any, secret: string, storage_key: string): void {
+		if (!value) return;
+		try {
+			const encrypted = encrypt(JSON.stringify(value), secret);
+			localStorage.setItem(storage_key, encrypted);
+		} catch (e) {
+			console.error("Error writing to localStorage:", e);
+		}
+	}
+
+	let old_value = gradio.props.value;
+	$effect(() => {
+		if (old_value !== gradio.props.value) {
+			old_value = gradio.props.value;
+			save_value(
+				gradio.props.value,
+				gradio.props.secret,
+				gradio.props.storage_key
+			);
+			gradio.dispatch("change");
+		}
+	});
+
+	onMount(() => {
+		load_value();
+	});
+</script>

6.26.0/browserstate/crypto.ts

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+import CryptoJS from "crypto-js";
+
+export function encrypt(data: string, key: string): string {
+	const hashedKey = CryptoJS.SHA256(key).toString();
+	const iv = CryptoJS.lib.WordArray.random(16);
+	const encrypted = CryptoJS.AES.encrypt(data, hashedKey, {
+		iv: iv,
+		mode: CryptoJS.mode.CBC,
+		padding: CryptoJS.pad.Pkcs7
+	});
+
+	const ivString = CryptoJS.enc.Base64.stringify(iv);
+	const cipherString = encrypted.toString();
+	return ivString + ":" + cipherString;
+}
+
+export function decrypt(encryptedData: string, key: string): string {
+	const hashedKey = CryptoJS.SHA256(key).toString();
+	const [ivString, cipherString] = encryptedData.split(":");
+	if (!ivString || !cipherString) return "";
+
+	const iv = CryptoJS.enc.Base64.parse(ivString);
+	const decrypted = CryptoJS.AES.decrypt(cipherString, hashedKey, {
+		iv: iv,
+		mode: CryptoJS.mode.CBC,
+		padding: CryptoJS.pad.Pkcs7
+	});
+
+	try {
+		return decrypted.toString(CryptoJS.enc.Utf8);
+	} catch {
+		return "";
+	}
+}

6.26.0/browserstate/package.json

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+{
+	"name": "@gradio/browserstate",
+	"version": "0.5.0",
+	"description": "Gradio UI packages",
+	"type": "module",
+	"author": "",
+	"license": "ISC",
+	"private": false,
+	"main_changeset": true,
+	"exports": {
+		".": {
+			"gradio": "./Index.svelte",
+			"svelte": "./dist/Index.svelte",
+			"types": "./dist/Index.svelte.d.ts"
+		},
+		"./package.json": "./package.json"
+	},
+	"dependencies": {
+		"@gradio/utils": "workspace:^",
+		"crypto-js": "^4.2.0",
+		"dequal": "^2.0.3"
+	},
+	"peerDependencies": {
+		"svelte": "^5.48.0"
+	},
+	"repository": {
+		"type": "git",
+		"url": "git+https://github.com/gradio-app/gradio.git",
+		"directory": "js/state"
+	},
+	"devDependencies": {
+		"@types/crypto-js": "^4.2.2"
+	}
+}