2023-06-10 00:57:35 +01:00
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use crate::utils::{CloneableFn, CloneableFnWithArg, FilterOptions};
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use crate::{
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filter_builder_methods, use_event_listener, watch_pausable_with_options, DebounceOptions,
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ThrottleOptions, WatchOptions, WatchPausableReturn,
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};
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use default_struct_builder::DefaultBuilder;
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use js_sys::Reflect;
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use leptos::*;
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use serde::{Deserialize, Serialize};
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use serde_json::Error;
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use std::time::Duration;
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use wasm_bindgen::{JsCast, JsValue};
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const CUSTOM_STORAGE_EVENT_NAME: &str = "leptos-use-storage";
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2023-06-10 03:19:00 +01:00
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/// Reactive [LocalStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage) / [SessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage).
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2023-06-10 00:57:35 +01:00
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///
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/// ## Demo
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///
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/// [Link to Demo](https://github.com/Synphonyte/leptos-use/tree/main/examples/use_storage)
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///
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/// ## Usage
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///
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/// It returns a triplet `(read_signal, write_signal, delete_from_storage_func)` of type `(ReadSignal<T>, WriteSignal<T>, Fn())`.
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///
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2023-06-10 01:52:21 +01:00
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/// Values are (de-)serialized to/from JSON using [`serde`](https://serde.rs/).
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///
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2023-06-10 00:57:35 +01:00
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/// ```
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/// # use leptos::*;
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/// # use leptos_use::storage::{StorageType, use_storage, use_storage_with_options, UseStorageOptions};
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/// # use serde::{Deserialize, Serialize};
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/// #
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/// #[derive(Serialize, Deserialize, Clone)]
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/// pub struct MyState {
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/// pub hello: String,
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/// pub greeting: String,
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/// }
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///
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/// # pub fn Demo(cx: Scope) -> impl IntoView {
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/// // bind struct. Must be serializable.
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/// let (state, set_state, _) = use_storage(
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/// cx,
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/// "my-state",
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/// MyState {
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/// hello: "hi".to_string(),
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/// greeting: "Hello".to_string()
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/// },
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/// ); // returns Signal<MyState>
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///
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/// // bind bool.
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/// let (flag, set_flag, remove_flag) = use_storage(cx, "my-flag", true); // returns Signal<bool>
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///
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/// // bind number
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/// let (count, set_count, _) = use_storage(cx, "my-count", 0); // returns Signal<i32>
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///
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/// // bind string with SessionStorage
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/// let (id, set_id, _) = use_storage_with_options(
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/// cx,
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/// "my-id",
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/// "some_string_id".to_string(),
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/// UseStorageOptions::default().storage_type(StorageType::Session),
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/// );
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/// # view! { cx, }
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/// # }
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/// ```
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///
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/// ## Merge Defaults
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///
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/// By default, [`use_storage`] will use the value from storage if it is present and ignores the default value.
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/// Be aware that when you add more properties to the default value, the key might be `None`
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/// (in the case of an `Option<T>` field) if client's storage does not have that key
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/// or deserialization might fail altogether.
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///
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/// Let's say you had a struct `MyState` that has been saved to storage
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///
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/// ```ignore
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/// #[derive(Serialize, Deserialize, Clone)]
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/// struct MyState {
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/// hello: String,
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/// }
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///
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/// let (state, .. ) = use_storage(cx, "my-state", MyState { hello: "hello" });
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/// ```
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///
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/// Now, in a newer version you added a field `greeting` to `MyState`.
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///
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/// ```ignore
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/// #[derive(Serialize, Deserialize, Clone)]
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/// struct MyState {
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/// hello: String,
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/// greeting: String,
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/// }
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///
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/// let (state, .. ) = use_storage(
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/// cx,
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/// "my-state",
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/// MyState { hello: "hi", greeting: "whatsup" },
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/// ); // fails to deserialize -> default value
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/// ```
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///
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/// This will fail to deserialize the stored string `{"hello": "hello"}` because it has no field `greeting`.
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/// Hence it just uses the new default value provided and the previously saved value is lost.
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///
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/// To mitigate that you can provide a `merge_defaults` option. This is a pure function pointer
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/// that takes the serialized (to json) stored value and the default value as arguments
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/// and should return the serialized merged value.
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///
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/// ```
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/// # use leptos::*;
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/// # use leptos_use::storage::{use_storage_with_options, UseStorageOptions};
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/// # use serde::{Deserialize, Serialize};
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/// #
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/// #[derive(Serialize, Deserialize, Clone)]
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/// pub struct MyState {
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/// pub hello: String,
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/// pub greeting: String,
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/// }
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/// #
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/// # pub fn Demo(cx: Scope) -> impl IntoView {
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/// let (state, set_state, _) = use_storage_with_options(
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/// cx,
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/// "my-state",
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/// MyState {
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/// hello: "hi".to_string(),
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/// greeting: "Hello".to_string()
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/// },
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/// UseStorageOptions::<MyState>::default().merge_defaults(|stored_value, default_value| {
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/// if stored_value.contains(r#""greeting":"#) {
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/// stored_value.to_string()
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/// } else {
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/// // add "greeting": "Hello" to the string
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/// stored_value.replace("}", &format!(r#""greeting": "{}"}}"#, default_value.greeting))
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/// }
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/// }),
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/// );
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/// #
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/// # view! { cx, }
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/// # }
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/// ```
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///
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/// ## Filter Storage Write
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///
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2023-06-10 01:52:21 +01:00
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/// You can specify `debounce` or `throttle` options for limiting writes to storage.
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2023-06-10 00:57:35 +01:00
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///
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/// ## See also
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///
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/// * [`use_local_storage`]
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/// * [`use_session_storage`]
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2023-06-23 22:13:14 +01:00
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// #[doc(cfg(feature = "storage"))]
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2023-06-10 00:57:35 +01:00
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pub fn use_storage<T, D>(
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cx: Scope,
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key: &str,
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defaults: D,
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) -> (ReadSignal<T>, WriteSignal<T>, impl Fn() + Clone)
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where
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for<'de> T: Serialize + Deserialize<'de> + Clone + 'static,
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D: Into<MaybeSignal<T>>,
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T: Clone,
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{
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use_storage_with_options(cx, key, defaults, UseStorageOptions::default())
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}
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/// Version of [`use_storage`] that accepts [`UseStorageOptions`]. See [`use_storage`] for how to use.
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2023-06-23 22:13:14 +01:00
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// #[doc(cfg(feature = "storage"))]
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2023-06-10 00:57:35 +01:00
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pub fn use_storage_with_options<T, D>(
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cx: Scope,
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key: &str,
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defaults: D,
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options: UseStorageOptions<T>,
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) -> (ReadSignal<T>, WriteSignal<T>, impl Fn() + Clone)
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where
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for<'de> T: Serialize + Deserialize<'de> + Clone + 'static,
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D: Into<MaybeSignal<T>>,
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T: Clone,
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{
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let defaults = defaults.into();
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let UseStorageOptions {
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storage_type,
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listen_to_storage_changes,
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write_defaults,
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merge_defaults,
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on_error,
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filter,
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} = options;
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let (data, set_data) = create_signal(cx, defaults.get_untracked());
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let storage = storage_type.into_storage();
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let remove: Box<dyn CloneableFn> = match storage {
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Ok(Some(storage)) => {
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let on_err = on_error.clone();
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let store = storage.clone();
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let k = key.to_string();
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let write = move |v: &T| {
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match serde_json::to_string(&v) {
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Ok(ref serialized) => match store.get_item(&k) {
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Ok(old_value) => {
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if old_value.as_ref() != Some(serialized) {
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2023-06-10 19:43:51 +01:00
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if let Err(e) = store.set_item(&k, serialized) {
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2023-06-10 00:57:35 +01:00
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on_err(UseStorageError::StorageAccessError(e));
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} else {
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let mut event_init = web_sys::CustomEventInit::new();
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event_init.detail(
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&StorageEventDetail {
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key: Some(k.clone()),
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old_value,
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new_value: Some(serialized.clone()),
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storage_area: Some(store.clone()),
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}
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.into(),
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);
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// importantly this should _not_ be a StorageEvent since those cannot
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// be constructed with a non-built-in storage area
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let _ = window().dispatch_event(
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&web_sys::CustomEvent::new_with_event_init_dict(
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CUSTOM_STORAGE_EVENT_NAME,
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&event_init,
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)
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.expect("Failed to create CustomEvent"),
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);
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}
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}
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}
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Err(e) => {
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on_err.clone()(UseStorageError::StorageAccessError(e));
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}
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},
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Err(e) => {
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on_err.clone()(UseStorageError::SerializationError(e));
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}
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}
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};
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let store = storage.clone();
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let on_err = on_error.clone();
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let k = key.to_string();
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let def = defaults.clone();
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let read = move |event_detail: Option<StorageEventDetail>| -> Option<T> {
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let raw_init = match serde_json::to_string(&def.get_untracked()) {
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Ok(serialized) => Some(serialized),
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Err(e) => {
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on_err.clone()(UseStorageError::DefaultSerializationError(e));
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None
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}
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};
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let raw_value = if let Some(event_detail) = event_detail {
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event_detail.new_value
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} else {
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match store.get_item(&k) {
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Ok(raw_value) => match raw_value {
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Some(raw_value) => {
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Some(merge_defaults(&raw_value, &def.get_untracked()))
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}
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None => raw_init.clone(),
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},
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Err(e) => {
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on_err.clone()(UseStorageError::StorageAccessError(e));
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None
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}
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}
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};
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match raw_value {
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Some(raw_value) => match serde_json::from_str(&raw_value) {
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Ok(v) => Some(v),
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Err(e) => {
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on_err.clone()(UseStorageError::SerializationError(e));
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None
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}
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},
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None => {
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if let Some(raw_init) = &raw_init {
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if write_defaults {
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if let Err(e) = store.set_item(&k, raw_init) {
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on_err(UseStorageError::StorageAccessError(e));
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}
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}
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}
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Some(def.get_untracked())
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}
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}
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};
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let WatchPausableReturn {
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pause: pause_watch,
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resume: resume_watch,
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..
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} = watch_pausable_with_options(
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cx,
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2023-06-21 13:09:00 +02:00
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move || data.get(),
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2023-06-10 00:57:35 +01:00
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move |data, _, _| write.clone()(data),
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WatchOptions::default().filter(filter),
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);
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let k = key.to_string();
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let store = storage.clone();
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let update = move |event_detail: Option<StorageEventDetail>| {
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if let Some(event_detail) = &event_detail {
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if event_detail.storage_area != Some(store) {
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return;
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}
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match &event_detail.key {
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None => {
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2023-06-21 13:09:00 +02:00
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set_data.set(defaults.get_untracked());
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2023-06-10 00:57:35 +01:00
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return;
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}
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Some(event_key) => {
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if event_key != &k {
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return;
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}
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}
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};
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}
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pause_watch();
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if let Some(value) = read(event_detail.clone()) {
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2023-06-21 13:09:00 +02:00
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set_data.set(value);
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2023-06-10 00:57:35 +01:00
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}
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if event_detail.is_some() {
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// use timeout to avoid inifinite loop
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let resume = resume_watch.clone();
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let _ = set_timeout_with_handle(resume, Duration::ZERO);
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} else {
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resume_watch();
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}
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};
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let upd = update.clone();
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let update_from_custom_event =
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move |event: web_sys::CustomEvent| upd.clone()(Some(event.into()));
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let upd = update.clone();
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let update_from_storage_event =
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move |event: web_sys::StorageEvent| upd.clone()(Some(event.into()));
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if listen_to_storage_changes {
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let _ = use_event_listener(cx, window(), ev::storage, update_from_storage_event);
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let _ = use_event_listener(
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cx,
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window(),
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ev::Custom::new(CUSTOM_STORAGE_EVENT_NAME),
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update_from_custom_event,
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);
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}
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update(None);
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let k = key.to_string();
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|
Box::new(move || {
|
|
|
|
let _ = storage.remove_item(&k);
|
|
|
|
})
|
|
|
|
}
|
|
|
|
Err(e) => {
|
|
|
|
on_error(UseStorageError::NoStorage(e));
|
|
|
|
Box::new(move || {})
|
|
|
|
}
|
|
|
|
_ => {
|
|
|
|
// do nothing
|
|
|
|
Box::new(move || {})
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
(data, set_data, move || remove.clone()())
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Clone)]
|
|
|
|
pub struct StorageEventDetail {
|
|
|
|
pub key: Option<String>,
|
|
|
|
pub old_value: Option<String>,
|
|
|
|
pub new_value: Option<String>,
|
|
|
|
pub storage_area: Option<web_sys::Storage>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl From<web_sys::StorageEvent> for StorageEventDetail {
|
|
|
|
fn from(event: web_sys::StorageEvent) -> Self {
|
|
|
|
Self {
|
|
|
|
key: event.key(),
|
|
|
|
old_value: event.old_value(),
|
|
|
|
new_value: event.new_value(),
|
|
|
|
storage_area: event.storage_area(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl From<web_sys::CustomEvent> for StorageEventDetail {
|
|
|
|
fn from(event: web_sys::CustomEvent) -> Self {
|
|
|
|
let detail = event.detail();
|
|
|
|
Self {
|
|
|
|
key: get_optional_string(&detail, "key"),
|
|
|
|
old_value: get_optional_string(&detail, "oldValue"),
|
|
|
|
new_value: get_optional_string(&detail, "newValue"),
|
|
|
|
storage_area: Reflect::get(&detail, &"storageArea".into())
|
|
|
|
.map(|v| v.dyn_into::<web_sys::Storage>().ok())
|
|
|
|
.unwrap_or_default(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl From<StorageEventDetail> for JsValue {
|
|
|
|
fn from(event: StorageEventDetail) -> Self {
|
|
|
|
let obj = js_sys::Object::new();
|
|
|
|
|
|
|
|
let _ = Reflect::set(&obj, &"key".into(), &event.key.into());
|
|
|
|
let _ = Reflect::set(&obj, &"oldValue".into(), &event.old_value.into());
|
|
|
|
let _ = Reflect::set(&obj, &"newValue".into(), &event.new_value.into());
|
|
|
|
let _ = Reflect::set(&obj, &"storageArea".into(), &event.storage_area.into());
|
|
|
|
|
|
|
|
obj.into()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn get_optional_string(v: &JsValue, key: &str) -> Option<String> {
|
|
|
|
Reflect::get(v, &key.into())
|
|
|
|
.map(|v| v.as_string())
|
|
|
|
.unwrap_or_default()
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Error type for use_storage_with_options
|
2023-06-23 22:13:14 +01:00
|
|
|
// #[doc(cfg(feature = "storage"))]
|
2023-06-10 00:57:35 +01:00
|
|
|
pub enum UseStorageError<E = ()> {
|
|
|
|
NoStorage(JsValue),
|
|
|
|
StorageAccessError(JsValue),
|
|
|
|
CustomStorageAccessError(E),
|
|
|
|
SerializationError(Error),
|
|
|
|
DefaultSerializationError(Error),
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Options for [`use_storage_with_options`].
|
2023-06-23 22:13:14 +01:00
|
|
|
// #[doc(cfg(feature = "storage"))]
|
2023-06-10 00:57:35 +01:00
|
|
|
#[derive(DefaultBuilder)]
|
|
|
|
pub struct UseStorageOptions<T> {
|
|
|
|
/// Type of storage. Can be `Local` (default), `Session` or `Custom(web_sys::Storage)`
|
2023-06-10 01:52:21 +01:00
|
|
|
pub(crate) storage_type: StorageType,
|
2023-06-10 00:57:35 +01:00
|
|
|
/// Listen to changes to this storage key from somewhere else. Defaults to true.
|
2023-06-10 01:52:21 +01:00
|
|
|
pub(crate) listen_to_storage_changes: bool,
|
2023-06-10 00:57:35 +01:00
|
|
|
/// If no value for the give key is found in the storage, write it. Defaults to true.
|
2023-06-10 01:52:21 +01:00
|
|
|
pub(crate) write_defaults: bool,
|
2023-06-10 00:57:35 +01:00
|
|
|
/// Takes the serialized (json) stored value and the default value and returns a merged version.
|
|
|
|
/// Defaults to simply returning the stored value.
|
2023-06-10 01:52:21 +01:00
|
|
|
pub(crate) merge_defaults: fn(&str, &T) -> String,
|
2023-06-10 00:57:35 +01:00
|
|
|
/// Optional callback whenever an error occurs. The callback takes an argument of type [`UseStorageError`].
|
2023-06-15 20:10:30 +01:00
|
|
|
#[builder(into)]
|
2023-06-10 01:52:21 +01:00
|
|
|
pub(crate) on_error: Box<dyn CloneableFnWithArg<UseStorageError>>,
|
2023-06-10 00:57:35 +01:00
|
|
|
|
|
|
|
/// Debounce or throttle the writing to storage whenever the value changes.
|
2023-06-10 01:52:21 +01:00
|
|
|
pub(crate) filter: FilterOptions,
|
2023-06-10 00:57:35 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
impl<T> Default for UseStorageOptions<T> {
|
|
|
|
fn default() -> Self {
|
|
|
|
Self {
|
|
|
|
storage_type: Default::default(),
|
|
|
|
listen_to_storage_changes: true,
|
|
|
|
write_defaults: true,
|
|
|
|
merge_defaults: |stored_value, _default_value| stored_value.to_string(),
|
|
|
|
on_error: Box::new(|_| ()),
|
|
|
|
filter: Default::default(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<T> UseStorageOptions<T> {
|
|
|
|
filter_builder_methods!(
|
|
|
|
/// the serializing and storing into storage
|
|
|
|
filter
|
|
|
|
);
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Local or session storage or a custom store that is a `web_sys::Storage`.
|
|
|
|
#[derive(Default)]
|
|
|
|
pub enum StorageType {
|
|
|
|
#[default]
|
|
|
|
Local,
|
|
|
|
Session,
|
|
|
|
Custom(web_sys::Storage),
|
|
|
|
}
|
|
|
|
|
|
|
|
impl StorageType {
|
|
|
|
pub fn into_storage(self) -> Result<Option<web_sys::Storage>, JsValue> {
|
|
|
|
match self {
|
|
|
|
StorageType::Local => window().local_storage(),
|
|
|
|
StorageType::Session => window().session_storage(),
|
|
|
|
StorageType::Custom(storage) => Ok(Some(storage)),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|