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use crate::request::Endpoint;
use crate::request::HasId;
use crate::request::RequestWithState;
use crate::request::ResultInfo;
use crate::result::Result;
use crate::util::to_json_response;
use crate::Error;
use mime::APPLICATION_JSON;
use reqwest::header::CONTENT_TYPE;
use reqwest::Method;
use serde::{de::DeserializeOwned, Serialize};
use uuid::Uuid;

/// This trait marks a `Request` as `Updatable` and unlocks the
/// `Request::update()` method.
pub trait Updatable {}

impl<T, S> RequestWithState<T, S>
where
    Self: Endpoint + Updatable,
    T: Serialize + DeserializeOwned + Clone,
    S: Clone,
{
    /// This method allows to update an existing model object. Please note, that
    /// `Request<T>` must implement the `Updatable` trait in order to make
    /// this function available.
    pub async fn update<I>(self, object: I) -> Result<ResultInfo<T>>
    where
        I: Into<T> + Send + HasId,
    {
        let uuid = object.id().ok_or(Error::NoUuid)?;
        self.update_with_id(uuid, object).await
    }

    /// This method allows to update an existing model object. Please note, that
    /// `Request<T>` must implement the `Updatable` trait in order to make
    /// this function available.
    pub async fn update_with_id<I, U>(
        self,
        uuid: U,
        object: I,
    ) -> Result<ResultInfo<T>>
    where
        I: Into<T> + Send + HasId,
        U: Into<Uuid>,
    {
        let object = object.into();
        let mut url = self.url().clone();
        url.path_segments_mut()
            .unwrap()
            .push(&uuid.into().to_string());
        Ok(to_json_response::<ResultInfo<T>>(
            self.client()
                .http_builder(Method::PUT, url)
                .header(CONTENT_TYPE, APPLICATION_JSON.as_ref())
                .json(&object),
        )
        .await?)
    }
}