libellule 0.1.3

Unofficial implementation of the PRONOTE protocol
Documentation 
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use serde::{Deserialize, Serialize};

use crate::error::ProtocolError;
use crate::model::Tab;

#[derive(Serialize, Debug)]
pub(crate) enum Function {
    #[serde(rename = "FonctionParametres")]
    InstanceParameters,

    Identification,

    #[serde(rename = "Authentification")]
    Authentication,

    #[serde(rename = "ParametresUtilisateur")]
    UserParameters,

    #[serde(rename = "DernieresNotes")]
    Grades,

    #[serde(rename = "PageEmploiDuTemps")]
    Timetable,

    #[serde(rename = "PageMenus")]
    Menu,

    #[serde(rename = "PageCahierDeTexte")]
    Homework,
}

#[derive(Serialize, Deserialize, Debug)]
pub(crate) struct SecuredData<T> {
    pub(crate) data: T,

    #[serde(
        rename = "Signature",
        skip_serializing_if = "Option::is_none",
        skip_deserializing
    )]
    pub(crate) signature: Option<Signature>,
}

#[derive(Serialize, Deserialize, Debug)]
pub(crate) struct Signature {
    #[serde(rename = "onglet")]
    tab: Tab,
}

#[derive(Serialize, Deserialize, Debug)]
pub(crate) struct UnsecuredData {
    #[serde(rename = "fichiers")]
    pub(crate) files: Vec<String>,
}

#[derive(Serialize, Debug)]
pub(crate) struct Request<T> {
    #[serde(rename = "id")]
    pub(crate) function: Function,

    #[serde(rename = "no")]
    pub(crate) request_count: String,

    pub(crate) session: u32,

    #[serde(rename = "dataSec")]
    pub(crate) secured_data: SecuredData<T>,
}

impl<T> Request<T> {
    pub(crate) fn new(
        function: Function,
        request_count: String,
        session: u32,
        tab: Option<Tab>,
        data: T,
    ) -> Request<T> {
        let signature = tab.map(|tab| Signature { tab });
        let secured_data = SecuredData { data, signature };

        Request {
            function,
            request_count,
            session,
            secured_data,
        }
    }
}

#[derive(Debug, Deserialize)]
pub(crate) struct Response<T> {
    #[serde(rename = "dataSec")]
    pub(crate) secured_data: Option<SecuredData<T>>,

    #[serde(rename = "dataNonSec")]
    pub(crate) _unsecured_data: Option<UnsecuredData>,

    #[serde(rename = "Erreur")]
    pub(crate) error: Option<ServerError>,
}

impl<T> Response<T> {
    pub(crate) fn into_data(self) -> Result<T, ProtocolError> {
        if let Some(error) = self.error {
            return Err(match error.code {
                22 => ProtocolError::SessionExpired,
                other => ProtocolError::Server {
                    code: other,
                    title: error.title,
                },
            });
        }

        self.secured_data
            .map(|secured_data| secured_data.data)
            .ok_or(ProtocolError::MissingData)
    }
}

#[derive(Debug, Deserialize)]
pub(crate) struct ServerError {
    #[serde(rename = "G")]
    pub(crate) code: i32,

    #[serde(rename = "Titre")]
    pub(crate) title: String,
}