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use std::{any::type_name, fmt::Debug, marker::PhantomData};
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use anyhow::Error;
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use serde::{de::DeserializeOwned, Deserialize, Serialize};
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use crate::{
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error::{GetValueError, OperationError},
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model::{instance::Instance, MessageTarget},
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};
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pub mod instance;
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pub mod repository;
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pub mod user;
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pub trait GiteratedObject: Send + Serialize + DeserializeOwned {
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fn object_name(&self) -> &str;
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fn from_object_str(object_str: &str) -> Result<Self, Error>;
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}
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pub trait GiteratedOperation<O: GiteratedObject>: Send + Serialize + DeserializeOwned {
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type Success: Serialize + DeserializeOwned + Send;
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type Failure: Serialize + DeserializeOwned + Send;
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fn operation_name(&self) -> &'static str {
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type_name::<Self>()
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}
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}
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pub trait GiteratedObjectValue: Serialize + DeserializeOwned {
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type Object: GiteratedObject;
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fn value_name() -> &'static str;
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}
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#[derive(Debug, Clone)]
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pub struct Object<'b, O: GiteratedObject, B: ObjectBackend + 'b + Send + Sync + Clone> {
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inner: O,
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backend: B,
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_marker: PhantomData<&'b ()>,
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}
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#[async_trait::async_trait]
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pub trait ObjectBackend: Send + Sync + Sized + Clone {
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async fn object_operation<O: GiteratedObject + Debug, D: GiteratedOperation<O> + Debug>(
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&self,
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object: O,
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operation: D,
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) -> Result<D::Success, OperationError<D::Failure>>;
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async fn get_object<O: GiteratedObject + Debug>(
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&self,
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object_str: &str,
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) -> Result<Object<O, Self>, OperationError<ObjectRequestError>>;
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}
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impl<'b, B: ObjectBackend + Send + Sync + Clone, O: GiteratedObject> Object<'b, O, B> {
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pub unsafe fn new_unchecked(object: O, backend: B) -> Object<'b, O, B> {
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Object {
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inner: object,
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backend,
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_marker: PhantomData,
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}
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}
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}
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impl<'b, O: GiteratedObject + Clone + Debug, B: ObjectBackend + Debug + Send + Sync + Clone>
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Object<'b, O, B>
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{
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pub async fn get<V: GiteratedObjectValue<Object = O> + Send>(
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&self,
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) -> Result<V, OperationError<ObjectRequestError>> {
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let operation: GetValue<V> = GetValue {
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value_name: V::value_name().to_string(),
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_marker: PhantomData,
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};
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let _message: GiteratedMessage<O, _> = GiteratedMessage {
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object: self.inner.clone(),
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operation: operation.operation_name().to_string(),
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payload: operation,
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};
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todo!()
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}
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pub fn request<R: GiteratedOperation<O> + Debug>(
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&mut self,
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request: R,
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) -> Result<R::Success, R::Failure> {
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self.backend.object_operation(self.inner.clone(), request);
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todo!()
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}
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}
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#[derive(Serialize, Deserialize)]
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pub struct GetValue<V: GiteratedObjectValue> {
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value_name: String,
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_marker: PhantomData<V>,
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}
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impl<O: GiteratedObject + Send, V: GiteratedObjectValue<Object = O> + Send> GiteratedOperation<O>
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for GetValue<V>
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{
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fn operation_name(&self) -> &'static str {
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"get_value"
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}
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type Success = V;
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type Failure = GetValueError;
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}
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#[derive(Serialize)]
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#[serde(bound(deserialize = "O: GiteratedObject, V: GiteratedOperation<O>"))]
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pub struct GiteratedMessage<O: GiteratedObject, V: GiteratedOperation<O>> {
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pub object: O,
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pub operation: String,
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pub payload: V,
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}
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impl<O: GiteratedObject, V: GiteratedOperation<O>> MessageTarget for GiteratedMessage<O, V> {}
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impl<V: GiteratedOperation<O> + Debug, O: GiteratedObject + Debug> Debug
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for GiteratedMessage<O, V>
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{
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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f.debug_struct("GiteratedMessage")
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.field("object", &self.object)
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.field("operation", &self.operation)
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.field("payload", &self.payload)
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.finish()
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}
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}
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#[derive(Debug, Serialize, Deserialize)]
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pub struct ObjectRequest(pub String);
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#[derive(Serialize, Deserialize)]
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pub struct ObjectResponse(pub Vec<u8>);
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impl GiteratedOperation<Instance> for ObjectRequest {
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type Success = ObjectResponse;
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type Failure = ObjectRequestError;
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}
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#[derive(Debug, thiserror::Error, Serialize, Deserialize)]
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pub enum ObjectRequestError {
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#[error("error decoding the object")]
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Deserialization(String),
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct AnyObject(Vec<u8>);
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impl GiteratedObject for AnyObject {
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fn object_name(&self) -> &str {
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"any"
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}
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fn from_object_str(object_str: &str) -> Result<Self, Error> {
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Ok(Self(Vec::from(object_str.as_bytes())))
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}
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct AnyOperation(Vec<u8>);
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impl<O: GiteratedObject> GiteratedOperation<O> for AnyOperation {
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type Success = Vec<u8>;
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type Failure = Vec<u8>;
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}
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