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/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2025 metamuffin <metamuffin.org>
*/
use super::ui::error::MyResult;
use crate::helper::A;
use jellycommon::{user::CreateSessionParams, NodeID, Visibility};
use jellyimport::asset_token::AssetInner;
use jellylogic::{
    login::login_logic,
    session::{AdminSession, Session},
    Database,
};
use rocket::{
    get,
    http::MediaType,
    outcome::Outcome,
    post,
    request::{self, FromRequest},
    response::Redirect,
    serde::json::Json,
    Request, State,
};
use serde_json::{json, Value};
use std::ops::Deref;

#[get("/api")]
pub fn r_api_root() -> Redirect {
    Redirect::moved("https://jellything.metamuffin.org/book/api.html#jellything-http-api")
}

#[get("/api/version")]
pub fn r_api_version() -> &'static str {
    env!("CARGO_PKG_VERSION")
}

#[post("/api/create_session", data = "<data>")]
pub fn r_api_account_login(
    database: &State<Database>,
    data: Json<CreateSessionParams>,
) -> MyResult<Value> {
    let token = login_logic(
        database,
        &data.username,
        &data.password,
        data.expire,
        data.drop_permissions.clone(),
    )?;
    Ok(json!(token))
}

#[get("/api/asset_token_raw/<token>")]
pub fn r_api_asset_token_raw(_admin: A<AdminSession>, token: &str) -> MyResult<Json<AssetInner>> {
    Ok(Json(AssetInner::deser(token)?))
}

#[get("/api/nodes_modified?<since>")]
pub fn r_api_nodes_modified_since(
    _session: A<Session>,
    database: &State<Database>,
    since: u64,
) -> MyResult<Json<Vec<NodeID>>> {
    let mut nodes = database.get_nodes_modified_since(since)?;
    nodes.retain(|id| {
        database.get_node(*id).is_ok_and(|n| {
            n.as_ref()
                .is_some_and(|n| n.visibility >= Visibility::Reduced)
        })
    });
    Ok(Json(nodes))
}

pub struct AcceptJson(bool);
impl Deref for AcceptJson {
    type Target = bool;
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}
impl<'r> FromRequest<'r> for AcceptJson {
    type Error = ();

    fn from_request<'life0, 'async_trait>(
        request: &'r Request<'life0>,
    ) -> ::core::pin::Pin<
        Box<
            dyn ::core::future::Future<Output = request::Outcome<Self, Self::Error>>
                + ::core::marker::Send
                + 'async_trait,
        >,
    >
    where
        'r: 'async_trait,
        'life0: 'async_trait,
        Self: 'async_trait,
    {
        Box::pin(async move {
            Outcome::Success(AcceptJson(
                request
                    .accept()
                    .map(|a| a.preferred().exact_eq(&MediaType::JSON))
                    .unwrap_or(false),
            ))
        })
    }
}