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use cosmwasm_schema::cw_serde;
use sg_std::SubMsg;
use thiserror::Error;
use cosmwasm_std::{Addr, CustomQuery, Deps, StdError, StdResult, Storage};
use cw_storage_plus::Item;
#[cw_serde]
pub struct HooksResponse {
pub hooks: Vec<String>,
}
#[derive(Error, Debug, PartialEq)]
pub enum HookError {
#[error("{0}")]
Std(#[from] StdError),
#[error("Given address already registered as a hook")]
HookAlreadyRegistered {},
#[error("Given address not registered as a hook")]
HookNotRegistered {},
#[error("Too many hooks")]
HookTooMany {},
}
pub struct Hooks<'a>(Item<'a, Vec<Addr>>);
impl<'a> Hooks<'a> {
pub const fn new(storage_key: &'a str) -> Self {
Hooks(Item::new(storage_key))
}
pub fn add_hook(&self, storage: &mut dyn Storage, addr: Addr) -> Result<(), HookError> {
let mut hooks = self.0.may_load(storage)?.unwrap_or_default();
if hooks.len() >= 5 {
return Err(HookError::HookTooMany {});
}
if !hooks.iter().any(|h| h == &addr) {
hooks.push(addr);
} else {
return Err(HookError::HookAlreadyRegistered {});
}
Ok(self.0.save(storage, &hooks)?)
}
pub fn remove_hook(&self, storage: &mut dyn Storage, addr: Addr) -> Result<(), HookError> {
let mut hooks = self.0.load(storage)?;
if let Some(p) = hooks.iter().position(|x| x == &addr) {
hooks.remove(p);
} else {
return Err(HookError::HookNotRegistered {});
}
Ok(self.0.save(storage, &hooks)?)
}
pub fn prepare_hooks<F: Fn(Addr) -> StdResult<SubMsg>>(
&self,
storage: &dyn Storage,
prep: F,
) -> StdResult<Vec<SubMsg>> {
self.0
.may_load(storage)?
.unwrap_or_default()
.into_iter()
.map(prep)
.collect()
}
pub fn query_hooks<Q: CustomQuery>(&self, deps: Deps<Q>) -> StdResult<HooksResponse> {
let hooks = self.0.may_load(deps.storage)?.unwrap_or_default();
let hooks = hooks.into_iter().map(String::from).collect();
Ok(HooksResponse { hooks })
}
}