fix(OTP Generator): add query and storage for secret (so can be remembered)

Fix #1208

src/composable/queryParams.ts

@@ -1,7 +1,8 @@
 import { useRouteQuery } from '@vueuse/router';
 import { computed } from 'vue';
+import { useStorage } from '@vueuse/core';
 
-export { useQueryParam };
+export { useQueryParam, useQueryParamOrStorage };
 
 const transformers = {
   number: {
@@ -16,6 +17,12 @@ const transformers = {
     fromQuery: (value: string) => value.toLowerCase() === 'true',
     toQuery: (value: boolean) => (value ? 'true' : 'false'),
   },
+  object: {
+    fromQuery: (value: string) => {
+      return JSON.parse(value);
+    },
+    toQuery: (value: object) => JSON.stringify(value),
+  },
 };
 
 function useQueryParam<T>({ name, defaultValue }: { name: string; defaultValue: T }) {
@@ -33,3 +40,27 @@ function useQueryParam<T>({ name, defaultValue }: { name: string; defaultValue:
     },
   });
 }
+
+function useQueryParamOrStorage<T>({ name, storageName, defaultValue }: { name: string; storageName: string; defaultValue: T }) {
+  const type = typeof defaultValue;
+  const transformer = transformers[type as keyof typeof transformers] ?? transformers.string;
+
+  const storageRef = useStorage(storageName, defaultValue);
+  const proxyDefaultValue = transformer.toQuery(defaultValue as never);
+  const proxy = useRouteQuery(name, proxyDefaultValue);
+
+  const r = ref(defaultValue);
+
+  watch(r,
+    (value) => {
+      proxy.value = transformer.toQuery(value as never);
+      storageRef.value = value as never;
+    },
+    { deep: true });
+
+  r.value = (proxy.value && proxy.value !== proxyDefaultValue
+    ? transformer.fromQuery(proxy.value) as unknown as T
+    : storageRef.value as T) as never;
+
+  return r;
+}

src/tools/otp-code-generator-and-validator/otp-code-generator-and-validator.vue

@@ -7,13 +7,18 @@ import TokenDisplay from './token-display.vue';
 import { useStyleStore } from '@/stores/style.store';
 import InputCopyable from '@/components/InputCopyable.vue';
 import { computedRefreshable } from '@/composable/computedRefreshable';
+import { useQueryParamOrStorage } from '@/composable/queryParams';
 
 const now = useTimestamp();
 const interval = computed(() => (now.value / 1000) % 30);
 const theme = useThemeVars();
 const styleStore = useStyleStore();
 
-const secret = ref(generateSecret());
+const secret = useQueryParamOrStorage({
+  name: 'secret',
+  storageName: 'otp-gen:secret',
+  defaultValue: generateSecret(),
+});
 
 function refreshSecret() {
   secret.value = generateSecret();