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|
//! Deezer client.
use std::fmt::Debug;
use std::time::Duration;
use hyper::client::{Client, HttpConnector};
use hyper::Uri;
use serde::Deserialize;
use crate::auth::{AccessToken, AuthCode};
use crate::errors::client::DeezerClientError;
use crate::playlist::Playlist;
use crate::user::{User, UserPlaylist, UserPlaylists};
/// Deezer API error.
#[derive(Debug, Deserialize)]
pub struct DeezerError
{
/// Error type.
#[serde(rename = "type")]
pub err_type: String,
/// Error message.
pub message: String,
/// Error code.
pub code: u32,
}
#[derive(Debug, Deserialize)]
struct ErrorResponseBody
{
error: DeezerError,
}
#[derive(Debug, Deserialize)]
struct AccessTokenResponse
{
pub access_token: String,
pub expires: u64,
}
impl From<AccessTokenResponse> for AccessToken
{
fn from(response: AccessTokenResponse) -> Self
{
Self {
access_token: response.access_token,
expires: Duration::from_secs(response.expires),
}
}
}
/// Deezer client.
#[derive(Default)]
pub struct DeezerClient
{
client: Client<HttpConnector>,
api_uri_authority: &'static str,
access_token_uri_authority: &'static str,
access_token_uri_path: &'static str,
}
impl DeezerClient
{
/// Creates a new Deezer client.
#[must_use]
pub fn new() -> Self
{
Self {
client: Client::new(),
api_uri_authority: "api.deezer.com",
access_token_uri_authority: "connect.deezer.com",
access_token_uri_path: "/oauth/access_token.php",
}
}
/// Returns the authenticated user.
///
/// # Errors
/// Will return Err if either sending the request or parsing the response fails.
pub async fn get_me(
&self,
access_token: AccessToken,
) -> Result<User, DeezerClientError>
{
let response = self
.client
.get(self.build_endpoint_uri(
&"user/me".to_string(),
&[("access_token", access_token.access_token)],
)?)
.await?;
let body_buf = &*hyper::body::to_bytes(response).await?;
let err_body_result: Result<ErrorResponseBody, _> =
serde_json::from_slice(body_buf);
if let Ok(err_body) = err_body_result {
return Err(DeezerClientError::ReceivedErrorResponse(err_body.error));
}
serde_json::from_slice(body_buf).map_err(DeezerClientError::ParseResponseFailed)
}
/// Returns the playlists of a user.
///
/// # Errors
/// Will return Err if either sending the request or parsing the response fails.
pub async fn get_user_playlists(
&self,
user_id: u64,
access_token: AccessToken,
) -> Result<Vec<UserPlaylist>, DeezerClientError>
{
let response = self
.client
.get(self.build_endpoint_uri(
&format!("user/{}/playlists", user_id),
&[("access_token", access_token.access_token)],
)?)
.await?;
let body_buf = &*hyper::body::to_bytes(response).await?;
let err_body_result: Result<ErrorResponseBody, _> =
serde_json::from_slice(body_buf);
if let Ok(err_body) = err_body_result {
return Err(DeezerClientError::ReceivedErrorResponse(err_body.error));
}
let user_playlists: UserPlaylists = serde_json::from_slice(body_buf)
.map_err(DeezerClientError::ParseResponseFailed)?;
Ok(user_playlists.data)
}
/// Returns a playlist.
///
/// # Errors
/// Will return Err if either sending the request or parsing the response fails.
pub async fn get_playlist(
&self,
playlist_id: u64,
access_token: AccessToken,
) -> Result<Playlist, DeezerClientError>
{
let response = self
.client
.get(self.build_endpoint_uri(
&format!("playlist/{}", playlist_id),
&[("access_token", access_token.access_token)],
)?)
.await?;
let body_buf = &*hyper::body::to_bytes(response).await?;
let err_body_result: Result<ErrorResponseBody, _> =
serde_json::from_slice(body_buf);
if let Ok(err_body) = err_body_result {
return Err(DeezerClientError::ReceivedErrorResponse(err_body.error));
}
serde_json::from_slice(body_buf).map_err(DeezerClientError::ParseResponseFailed)
}
/// Returns a access token.
///
/// # Errors
/// Will return Err if either sending the request or parsing the response fails.
pub async fn get_access_token(
&self,
app_id: u32,
secret_key: String,
auth_code: AuthCode,
) -> Result<AccessToken, DeezerClientError>
{
let uri = Uri::builder()
.scheme("http")
.authority(self.access_token_uri_authority)
.path_and_query(format!(
"{}?app_id={}&secret={}&code={}&output=json",
self.access_token_uri_path, app_id, secret_key, auth_code
))
.build()
.map_err(|_| DeezerClientError::BuildAPIEndpointURIFailed)?;
let response = self.client.get(uri).await?;
let body_buf = &*hyper::body::to_bytes(response).await?;
let err_body_result: Result<ErrorResponseBody, _> =
serde_json::from_slice(body_buf);
if let Ok(err_body) = err_body_result {
return Err(DeezerClientError::ReceivedErrorResponse(err_body.error));
}
let access_token_response_result =
serde_json::from_slice::<AccessTokenResponse>(body_buf);
if let Ok(access_token_response) = access_token_response_result {
Ok(access_token_response.into())
} else {
let body_str = std::str::from_utf8(body_buf)
.map_err(|_| DeezerClientError::AuthErrorResponseNotUTF8)?;
Err(DeezerClientError::ReceivedAuthErrorResponse(
body_str.to_string(),
))
}
}
fn build_endpoint_uri(
&self,
endpoint: &String,
query_params: &[(&'static str, String)],
) -> Result<Uri, DeezerClientError>
{
Uri::builder()
.scheme("http")
.authority(self.api_uri_authority)
.path_and_query(format!(
"/{}?{}",
endpoint,
query_params
.iter()
.map(|(key, value)| format!("{}={}", key, value))
.fold(String::new(), |acc, query_param| format!(
"{}&{}",
acc, query_param
))
))
.build()
.map_err(|_| DeezerClientError::BuildAPIEndpointURIFailed)
}
}
|
