96 lines
2.5 KiB
Rust
96 lines
2.5 KiB
Rust
use std::{hint::unreachable_unchecked, marker::PhantomData};
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use js_sys::{Array, JsString, Object};
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use wasm_bindgen::JsValue;
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pub struct IdbObject<State>(Array, PhantomData<State>);
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impl<State: IdbObjectState> IdbObject<State> {
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fn add_tuple<NextState>(self, key: &str, value: &JsValue) -> IdbObject<NextState> {
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let array = Array::new();
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array.push(&JsString::from(key));
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array.push(value);
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self.0.push(&array);
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IdbObject(self.0, PhantomData)
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}
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}
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impl From<IdbObject<Ready>> for Object {
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fn from(db_object: IdbObject<Ready>) -> Self {
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match Self::from_entries(db_object.as_ref()) {
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Ok(o) => o,
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// SAFETY: IdbObject maintains the invariant that it can eventually
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// be constructed into a JS object.
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_ => unsafe { unreachable_unchecked() },
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}
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}
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}
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impl IdbObject<NeedsType> {
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pub fn new() -> Self {
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Self(Array::new(), PhantomData)
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}
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pub fn video(self) -> IdbObject<NeedsExpiration> {
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self.add_tuple("type", &JsString::from("video"))
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}
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pub fn audio(self) -> IdbObject<NeedsExpiration> {
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self.add_tuple("type", &JsString::from("audio"))
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}
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pub fn image(self) -> IdbObject<NeedsExpiration> {
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self.add_tuple("type", &JsString::from("image"))
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}
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pub fn blob(self) -> IdbObject<NeedsExpiration> {
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self.add_tuple("type", &JsString::from("blob"))
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}
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pub fn string(self) -> IdbObject<NeedsExpiration> {
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self.add_tuple("type", &JsString::from("string"))
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}
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}
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impl Default for IdbObject<NeedsType> {
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fn default() -> Self {
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Self::new()
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}
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}
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impl IdbObject<NeedsExpiration> {
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pub fn expiration_text(self, expires: &str) -> IdbObject<NeedsData> {
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self.add_tuple("expiration", &JsString::from(expires))
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}
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}
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impl IdbObject<NeedsData> {
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pub fn data(self, value: &JsValue) -> IdbObject<Ready> {
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self.add_tuple("data", value)
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}
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}
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impl IdbObject<Ready> {
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pub fn extra(self, key: &str, value: impl Into<JsValue>) -> Self {
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self.add_tuple(key, &value.into())
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}
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}
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impl AsRef<JsValue> for IdbObject<Ready> {
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fn as_ref(&self) -> &JsValue {
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self.0.as_ref()
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}
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}
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macro_rules! impl_idb_object_state {
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($($ident:ident),*) => {
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pub trait IdbObjectState {}
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$(
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pub enum $ident {}
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impl IdbObjectState for $ident {}
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)*
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};
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}
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impl_idb_object_state!(NeedsType, NeedsExpiration, NeedsData, Ready);
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