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use crate::format::Text;
use std::fmt;
use stdweb::web::{window, Storage};
use thiserror::Error;
#[derive(Debug, Error)]
enum StorageError {
#[error("restore error")]
CantRestore,
}
#[derive(Debug)]
pub enum Area {
Local,
Session,
}
pub struct StorageService {
storage: Storage,
}
impl fmt::Debug for StorageService {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("StorageService")
}
}
impl StorageService {
pub fn new(area: Area) -> Self {
let storage = {
match area {
Area::Local => window().local_storage(),
Area::Session => window().session_storage(),
}
};
StorageService { storage }
}
pub fn store<T>(&mut self, key: &str, value: T)
where
T: Into<Text>,
{
if let Ok(data) = value.into() {
self.storage
.insert(key, &data)
.expect("can't insert value to a storage");
}
}
pub fn restore<T>(&self, key: &str) -> T
where
T: From<Text>,
{
let data = self
.storage
.get(key)
.ok_or_else(|| StorageError::CantRestore.into());
T::from(data)
}
pub fn remove(&mut self, key: &str) {
self.storage.remove(key);
}
}