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use std::{error::Error, fmt};
use num_derive::FromPrimitive;
use serde_repr::{Deserialize_repr, Serialize_repr};
use crate::{constants::ErrorCode, FromReturnCode};
/// Error codes used by
/// [StructureRampart::set_public](crate::StructureRampart::set_public).
///
/// [Screeps API Docs](https://docs.screeps.com/api/#StructureRampart.setPublic).
///
/// [Screeps Engine Source Code](https://github.com/screeps/engine/blob/97c9d12385fed686655c13b09f5f2457dd83a2bf/src/game/structures.js#L651)
#[derive(
Debug, PartialEq, Eq, Clone, Copy, Hash, FromPrimitive, Deserialize_repr, Serialize_repr,
)]
#[repr(i8)]
pub enum SetPublicErrorCode {
NotOwner = -1,
}
impl FromReturnCode for SetPublicErrorCode {
type Error = Self;
fn result_from_i8(val: i8) -> Result<(), Self::Error> {
let maybe_result = Self::try_result_from_i8(val);
#[cfg(feature = "unsafe-return-conversion")]
unsafe {
maybe_result.unwrap_unchecked()
}
#[cfg(not(feature = "unsafe-return-conversion"))]
maybe_result.unwrap()
}
fn try_result_from_i8(val: i8) -> Option<Result<(), Self::Error>> {
match val {
0 => Some(Ok(())),
-1 => Some(Err(SetPublicErrorCode::NotOwner)),
_ => None,
}
}
}
impl fmt::Display for SetPublicErrorCode {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let msg: &'static str = match self {
SetPublicErrorCode::NotOwner => "you are not the owner of this structure",
};
write!(f, "{}", msg)
}
}
impl Error for SetPublicErrorCode {}
impl From<SetPublicErrorCode> for ErrorCode {
fn from(value: SetPublicErrorCode) -> Self {
// Safety: SetPublicErrorCode is repr(i8), so we can cast it to get the
// discriminant value, which will match the raw return code value that ErrorCode
// expects. Ref: https://doc.rust-lang.org/reference/items/enumerations.html#r-items.enum.discriminant.coercion.intro
// Safety: SetPublicErrorCode discriminants are always error code values, and
// thus the Result returned here will always be an `Err` variant, so we can
// always extract the error without panicking
Self::result_from_i8(value as i8).unwrap_err()
}
}