oysteikt/mpvipc-async
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mpvipc-async
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WIP

This commit is contained in:
Oystein Kristoffer Tveit 2024-05-02 23:58:01 +02:00
parent 7eec34ce00
commit 39f5833767
Signed by: oysteikt
GPG Key ID: 9F2F7D8250F35146
8 changed files with 354 additions and 307 deletions
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1
Cargo.toml
View File

@ -18,6 +18,7 @@ tokio = { version = "1.37.0", features = ["sync", "macros", "rt", "net"] }
tokio-util = { version = "0.7.10", features = ["codec"] } tokio-util = { version = "0.7.10", features = ["codec"] }
futures = "0.3.30" futures = "0.3.30"
tokio-stream = { version = "0.1.15", features = ["sync"] } tokio-stream = { version = "0.1.15", features = ["sync"] }
thiserror = "1.0.59"
[dev-dependencies] [dev-dependencies]
env_logger = "0.10.0" env_logger = "0.10.0"

94
src/core_api.rs
View File

@ -12,7 +12,7 @@ use tokio::{
use crate::{ use crate::{
ipc::{MpvIpc, MpvIpcCommand, MpvIpcEvent, MpvIpcResponse}, ipc::{MpvIpc, MpvIpcCommand, MpvIpcEvent, MpvIpcResponse},
message_parser::TypeHandler, message_parser::TypeHandler,
Error, ErrorCode, Event, Event, MpvError,
}; };
/// All possible commands that can be sent to mpv. /// All possible commands that can be sent to mpv.
@ -134,14 +134,14 @@ impl IntoRawCommandPart for SeekOptions {
pub trait GetPropertyTypeHandler: Sized { pub trait GetPropertyTypeHandler: Sized {
// TODO: fix this // TODO: fix this
#[allow(async_fn_in_trait)] #[allow(async_fn_in_trait)]
async fn get_property_generic(instance: &Mpv, property: &str) -> Result<Self, Error>; async fn get_property_generic(instance: &Mpv, property: &str) -> Result<Self, MpvError>;
} }
impl<T> GetPropertyTypeHandler for T impl<T> GetPropertyTypeHandler for T
where where
T: TypeHandler, T: TypeHandler,
{ {
async fn get_property_generic(instance: &Mpv, property: &str) -> Result<T, Error> { async fn get_property_generic(instance: &Mpv, property: &str) -> Result<T, MpvError> {
instance instance
.get_property_value(property) .get_property_value(property)
.await .await
@ -153,17 +153,22 @@ where
pub trait SetPropertyTypeHandler<T> { pub trait SetPropertyTypeHandler<T> {
// TODO: fix this // TODO: fix this
#[allow(async_fn_in_trait)] #[allow(async_fn_in_trait)]
async fn set_property_generic(instance: &Mpv, property: &str, value: T) -> Result<(), Error>; async fn set_property_generic(instance: &Mpv, property: &str, value: T)
-> Result<(), MpvError>;
} }
impl<T> SetPropertyTypeHandler<T> for T impl<T> SetPropertyTypeHandler<T> for T
where where
T: Serialize, T: Serialize,
{ {
async fn set_property_generic(instance: &Mpv, property: &str, value: T) -> Result<(), Error> { async fn set_property_generic(
instance: &Mpv,
property: &str,
value: T,
) -> Result<(), MpvError> {
let (res_tx, res_rx) = oneshot::channel(); let (res_tx, res_rx) = oneshot::channel();
let value = serde_json::to_value(value) let value = serde_json::to_value(value).map_err(|why| MpvError::JsonParseError(why))?;
.map_err(|why| Error(ErrorCode::JsonParseError(why.to_string())))?;
instance instance
.command_sender .command_sender
.send(( .send((
@ -171,15 +176,11 @@ where
res_tx, res_tx,
)) ))
.await .await
.map_err(|_| { .map_err(|err| MpvError::InternalConnectionError(err.to_string()))?;
Error(ErrorCode::ConnectError(
"Failed to send command".to_string(),
))
})?;
match res_rx.await { match res_rx.await {
Ok(MpvIpcResponse(response)) => response.map(|_| ()), Ok(MpvIpcResponse(response)) => response.map(|_| ()),
Err(err) => Err(Error(ErrorCode::ConnectError(err.to_string()))), Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
} }
} }
} }
@ -205,18 +206,18 @@ impl fmt::Debug for Mpv {
} }
impl Mpv { impl Mpv {
pub async fn connect(socket_path: &str) -> Result<Mpv, Error> { pub async fn connect(socket_path: &str) -> Result<Mpv, MpvError> {
log::debug!("Connecting to mpv socket at {}", socket_path); log::debug!("Connecting to mpv socket at {}", socket_path);
let socket = match UnixStream::connect(socket_path).await { let socket = match UnixStream::connect(socket_path).await {
Ok(stream) => Ok(stream), Ok(stream) => Ok(stream),
Err(internal_error) => Err(Error(ErrorCode::ConnectError(internal_error.to_string()))), Err(err) => Err(MpvError::MpvSocketConnectionError(err.to_string())),
}?; }?;
Self::connect_socket(socket).await Self::connect_socket(socket).await
} }
pub async fn connect_socket(socket: UnixStream) -> Result<Mpv, Error> { pub async fn connect_socket(socket: UnixStream) -> Result<Mpv, MpvError> {
let (com_tx, com_rx) = mpsc::channel(100); let (com_tx, com_rx) = mpsc::channel(100);
let (ev_tx, _) = broadcast::channel(100); let (ev_tx, _) = broadcast::channel(100);
let ipc = MpvIpc::new(socket, com_rx, ev_tx.clone()); let ipc = MpvIpc::new(socket, com_rx, ev_tx.clone());
@ -230,29 +231,24 @@ impl Mpv {
}) })
} }
pub async fn disconnect(&self) -> Result<(), Error> { pub async fn disconnect(&self) -> Result<(), MpvError> {
let (res_tx, res_rx) = oneshot::channel(); let (res_tx, res_rx) = oneshot::channel();
self.command_sender self.command_sender
.send((MpvIpcCommand::Exit, res_tx)) .send((MpvIpcCommand::Exit, res_tx))
.await .await
.map_err(|_| { .map_err(|err| MpvError::InternalConnectionError(err.to_string()))?;
Error(ErrorCode::ConnectError(
"Failed to send command".to_string(),
))
})?;
match res_rx.await { match res_rx.await {
Ok(MpvIpcResponse(response)) => response.map(|_| ()), Ok(MpvIpcResponse(response)) => response.map(|_| ()),
Err(err) => Err(Error(ErrorCode::ConnectError(err.to_string()))), Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
} }
} }
pub async fn get_event_stream(&self) -> impl futures::Stream<Item = Result<Event, Error>> { pub async fn get_event_stream(&self) -> impl futures::Stream<Item = Result<Event, MpvError>> {
tokio_stream::wrappers::BroadcastStream::new(self.broadcast_channel.subscribe()).map( tokio_stream::wrappers::BroadcastStream::new(self.broadcast_channel.subscribe()).map(
|event| match event { |event| match event {
Ok(event) => crate::event_parser::parse_event(event), Ok(event) => crate::event_parser::parse_event(event),
Err(_) => Err(Error(ErrorCode::ConnectError( Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
"Failed to receive event".to_string(),
))),
}, },
) )
} }
@ -264,7 +260,7 @@ impl Mpv {
&self, &self,
command: &str, command: &str,
args: &[&str], args: &[&str],
) -> Result<Option<Value>, Error> { ) -> Result<Option<Value>, MpvError> {
let command = Vec::from( let command = Vec::from(
[command] [command]
.iter() .iter()
@ -277,15 +273,11 @@ impl Mpv {
self.command_sender self.command_sender
.send((MpvIpcCommand::Command(command), res_tx)) .send((MpvIpcCommand::Command(command), res_tx))
.await .await
.map_err(|_| { .map_err(|err| MpvError::InternalConnectionError(err.to_string()))?;
Error(ErrorCode::ConnectError(
"Failed to send command".to_string(),
))
})?;
match res_rx.await { match res_rx.await {
Ok(MpvIpcResponse(response)) => response, Ok(MpvIpcResponse(response)) => response,
Err(err) => Err(Error(ErrorCode::ConnectError(err.to_string()))), Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
} }
} }
@ -293,7 +285,7 @@ impl Mpv {
&self, &self,
command: &str, command: &str,
args: &[&str], args: &[&str],
) -> Result<(), Error> { ) -> Result<(), MpvError> {
self.run_command_raw(command, args).await.map(|_| ()) self.run_command_raw(command, args).await.map(|_| ())
} }
@ -323,7 +315,7 @@ impl Mpv {
/// Ok(()) /// Ok(())
/// } /// }
/// ``` /// ```
pub async fn run_command(&self, command: MpvCommand) -> Result<(), Error> { pub async fn run_command(&self, command: MpvCommand) -> Result<(), MpvError> {
log::trace!("Running command: {:?}", command); log::trace!("Running command: {:?}", command);
let result = match command { let result = match command {
MpvCommand::LoadFile { file, option } => { MpvCommand::LoadFile { file, option } => {
@ -345,15 +337,11 @@ impl Mpv {
self.command_sender self.command_sender
.send((MpvIpcCommand::ObserveProperty(id, property), res_tx)) .send((MpvIpcCommand::ObserveProperty(id, property), res_tx))
.await .await
.map_err(|_| { .map_err(|err| MpvError::InternalConnectionError(err.to_string()))?;
Error(ErrorCode::ConnectError(
"Failed to send command".to_string(),
))
})?;
match res_rx.await { match res_rx.await {
Ok(MpvIpcResponse(response)) => response.map(|_| ()), Ok(MpvIpcResponse(response)) => response.map(|_| ()),
Err(err) => Err(Error(ErrorCode::ConnectError(err.to_string()))), Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
} }
} }
MpvCommand::PlaylistClear => { MpvCommand::PlaylistClear => {
@ -412,10 +400,11 @@ impl Mpv {
self.command_sender self.command_sender
.send((MpvIpcCommand::UnobserveProperty(id), res_tx)) .send((MpvIpcCommand::UnobserveProperty(id), res_tx))
.await .await
.unwrap(); .map_err(|err| MpvError::InternalConnectionError(err.to_string()))?;
match res_rx.await { match res_rx.await {
Ok(MpvIpcResponse(response)) => response.map(|_| ()), Ok(MpvIpcResponse(response)) => response.map(|_| ()),
Err(err) => Err(Error(ErrorCode::ConnectError(err.to_string()))), Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
} }
} }
}; };
@ -452,7 +441,7 @@ impl Mpv {
pub async fn get_property<T: GetPropertyTypeHandler>( pub async fn get_property<T: GetPropertyTypeHandler>(
&self, &self,
property: &str, property: &str,
) -> Result<T, Error> { ) -> Result<T, MpvError> {
T::get_property_generic(self, property).await T::get_property_generic(self, property).await
} }
@ -475,21 +464,18 @@ impl Mpv {
/// Ok(()) /// Ok(())
/// } /// }
/// ``` /// ```
pub async fn get_property_value(&self, property: &str) -> Result<Value, Error> { pub async fn get_property_value(&self, property: &str) -> Result<Value, MpvError> {
let (res_tx, res_rx) = oneshot::channel(); let (res_tx, res_rx) = oneshot::channel();
self.command_sender self.command_sender
.send((MpvIpcCommand::GetProperty(property.to_owned()), res_tx)) .send((MpvIpcCommand::GetProperty(property.to_owned()), res_tx))
.await .await
.map_err(|_| { .map_err(|err| MpvError::InternalConnectionError(err.to_string()))?;
Error(ErrorCode::ConnectError(
"Failed to send command".to_string(),
))
})?;
match res_rx.await { match res_rx.await {
Ok(MpvIpcResponse(response)) => { Ok(MpvIpcResponse(response)) => {
response.and_then(|value| value.ok_or(Error(ErrorCode::MissingValue))) response.and_then(|value| value.ok_or(MpvError::MissingMpvData))
} }
Err(err) => Err(Error(ErrorCode::ConnectError(err.to_string()))), Err(err) => Err(MpvError::InternalConnectionError(err.to_string())),
} }
} }
@ -521,7 +507,7 @@ impl Mpv {
&self, &self,
property: &str, property: &str,
value: T, value: T,
) -> Result<(), Error> { ) -> Result<(), MpvError> {
T::set_property_generic(self, property, value).await T::set_property_generic(self, property, value).await
} }
} }

136
src/error.rs
View File

@ -1,72 +1,84 @@
//! Library specific error messages. //! Library specific error messages.
use core::fmt; use thiserror::Error;
use std::fmt::Display;
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
use serde_json::{error, Map, Value};
/// All possible errors that can occur when interacting with mpv. use tokio_util::codec::LinesCodecError;
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum ErrorCode {
MpvError(String),
JsonParseError(String),
ConnectError(String),
JsonContainsUnexptectedType,
UnexpectedResult,
UnexpectedValue,
MissingValue,
UnsupportedType,
ValueDoesNotContainBool,
ValueDoesNotContainF64,
ValueDoesNotContainHashMap,
ValueDoesNotContainPlaylist,
ValueDoesNotContainString,
ValueDoesNotContainUsize,
}
/// Any error that can occur when interacting with mpv. /// Any error that can occur when interacting with mpv.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] #[derive(Error, Debug)]
pub struct Error(pub ErrorCode); pub enum MpvError {
#[error("MpvError: {0}")]
MpvError(String),
impl Display for Error { #[error("Error communicating over mpv socket: {0}")]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { MpvSocketConnectionError(String),
Display::fmt(&self.0, f)
} #[error("Internal connection error: {0}")]
InternalConnectionError(String),
#[error("JsonParseError: {0}")]
JsonParseError(#[from] serde_json::Error),
#[error("Mpv sent a value with an unexpected type")]
ValueContainsUnexpectedType {
expected: String,
received: Value,
},
#[error("Missing expected data in mpv message")]
MissingMpvData,
#[error("Missing key in object")]
MissingKeyInObject {
key: String,
map: Map<String, Value>,
},
} }
impl std::error::Error for Error {} // #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
// pub struct Error(pub ErrorCode);
impl Display for ErrorCode { // impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { // fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self { // Display::fmt(&self.0, f)
ErrorCode::ConnectError(ref msg) => f.write_str(&format!("ConnectError: {}", msg)), // }
ErrorCode::JsonParseError(ref msg) => f.write_str(&format!("JsonParseError: {}", msg)), // }
ErrorCode::MpvError(ref msg) => f.write_str(&format!("MpvError: {}", msg)),
ErrorCode::JsonContainsUnexptectedType => { // impl std::error::Error for Error {}
f.write_str("Mpv sent a value with an unexpected type")
} // impl Display for ErrorCode {
ErrorCode::UnexpectedResult => f.write_str("Unexpected result received"), // fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
ErrorCode::UnexpectedValue => f.write_str("Unexpected value received"), // match *self {
ErrorCode::MissingValue => f.write_str("Missing value"), // ErrorCode::ConnectError(ref msg) => f.write_str(&format!("ConnectError: {}", msg)),
ErrorCode::UnsupportedType => f.write_str("Unsupported type received"), // ErrorCode::JsonParseError(ref msg) => f.write_str(&format!("JsonParseError: {}", msg)),
ErrorCode::ValueDoesNotContainBool => { // ErrorCode::MpvError(ref msg) => f.write_str(&format!("MpvError: {}", msg)),
f.write_str("The received value is not of type \'std::bool\'") // ErrorCode::JsonContainsUnexptectedType => {
} // f.write_str("Mpv sent a value with an unexpected type")
ErrorCode::ValueDoesNotContainF64 => { // }
f.write_str("The received value is not of type \'std::f64\'") // ErrorCode::UnexpectedResult => f.write_str("Unexpected result received"),
} // ErrorCode::UnexpectedValue => f.write_str("Unexpected value received"),
ErrorCode::ValueDoesNotContainHashMap => { // ErrorCode::MissingValue => f.write_str("Missing value"),
f.write_str("The received value is not of type \'std::collections::HashMap\'") // ErrorCode::UnsupportedType => f.write_str("Unsupported type received"),
} // ErrorCode::ValueDoesNotContainBool => {
ErrorCode::ValueDoesNotContainPlaylist => { // f.write_str("The received value is not of type \'std::bool\'")
f.write_str("The received value is not of type \'mpvipc::Playlist\'") // }
} // ErrorCode::ValueDoesNotContainF64 => {
ErrorCode::ValueDoesNotContainString => { // f.write_str("The received value is not of type \'std::f64\'")
f.write_str("The received value is not of type \'std::string::String\'") // }
} // ErrorCode::ValueDoesNotContainHashMap => {
ErrorCode::ValueDoesNotContainUsize => { // f.write_str("The received value is not of type \'std::collections::HashMap\'")
f.write_str("The received value is not of type \'std::usize\'") // }
} // ErrorCode::ValueDoesNotContainPlaylist => {
} // f.write_str("The received value is not of type \'mpvipc::Playlist\'")
} // }
} // ErrorCode::ValueDoesNotContainString => {
// f.write_str("The received value is not of type \'std::string::String\'")
// }
// ErrorCode::ValueDoesNotContainUsize => {
// f.write_str("The received value is not of type \'std::usize\'")
// }
// }
// }
// }

148
src/event_parser.rs
View File

@ -5,7 +5,7 @@ use std::str::FromStr;
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
use serde_json::{Map, Value}; use serde_json::{Map, Value};
use crate::{ipc::MpvIpcEvent, message_parser::json_to_value, Error, ErrorCode, MpvDataType}; use crate::{ipc::MpvIpcEvent, message_parser::json_to_value, MpvDataType, MpvError};
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)] #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "kebab-case")] #[serde(rename_all = "kebab-case")]
@ -147,6 +147,37 @@ pub enum Event {
Unimplemented(Map<String, Value>), Unimplemented(Map<String, Value>),
} }
macro_rules! get_key_as {
($as_type:ident, $key:expr, $event:ident) => {{
let tmp = $event.get($key).ok_or(MpvError::MissingKeyInObject {
key: $key.to_owned(),
map: $event.clone(),
})?;
tmp.$as_type()
.ok_or(MpvError::ValueContainsUnexpectedType {
expected: stringify!($as_type).strip_prefix("as_").unwrap().to_owned(),
received: tmp.clone(),
})?
}};
}
macro_rules! get_optional_key_as {
($as_type:ident, $key:expr, $event:ident) => {{
if let Some(tmp) = $event.get($key) {
Some(
tmp.$as_type()
.ok_or(MpvError::ValueContainsUnexpectedType {
expected: stringify!($as_type).strip_prefix("as_").unwrap().to_owned(),
received: tmp.clone(),
})?,
)
} else {
None
}
}};
}
// NOTE: I have not been able to test all of these events, // NOTE: I have not been able to test all of these events,
// so some of the parsing logic might be incorrect. // so some of the parsing logic might be incorrect.
// In particular, I have not been able to make mpv // In particular, I have not been able to make mpv
@ -157,19 +188,17 @@ pub enum Event {
// If you need this, please open an issue or a PR. // If you need this, please open an issue or a PR.
/// Parse a highlevel [`Event`] objects from json. /// Parse a highlevel [`Event`] objects from json.
#[allow(deprecated)] pub(crate) fn parse_event(raw_event: MpvIpcEvent) -> Result<Event, MpvError> {
pub(crate) fn parse_event(raw_event: MpvIpcEvent) -> Result<Event, Error> {
let MpvIpcEvent(event) = raw_event; let MpvIpcEvent(event) = raw_event;
event event
.as_object() .as_object()
.ok_or(Error(ErrorCode::JsonContainsUnexptectedType)) .ok_or(MpvError::ValueContainsUnexpectedType {
expected: "object".to_owned(),
received: event.clone(),
})
.and_then(|event| { .and_then(|event| {
let event_name = event let event_name = get_key_as!(as_str, "event", event);
.get("event")
.ok_or(Error(ErrorCode::MissingValue))?
.as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?;
match event_name { match event_name {
"start-file" => parse_start_file(event), "start-file" => parse_start_file(event),
@ -200,35 +229,20 @@ pub(crate) fn parse_event(raw_event: MpvIpcEvent) -> Result<Event, Error> {
}) })
} }
fn parse_start_file(event: &Map<String, Value>) -> Result<Event, Error> { fn parse_start_file(event: &Map<String, Value>) -> Result<Event, MpvError> {
let playlist_entry_id = event let playlist_entry_id = get_key_as!(as_u64, "playlist_entry_id", event) as usize;
.get("playlist_entry_id")
.ok_or(Error(ErrorCode::MissingValue))?
.as_u64()
.ok_or(Error(ErrorCode::ValueDoesNotContainUsize))? as usize;
Ok(Event::StartFile { playlist_entry_id }) Ok(Event::StartFile { playlist_entry_id })
} }
fn parse_end_file(event: &Map<String, Value>) -> Result<Event, Error> { fn parse_end_file(event: &Map<String, Value>) -> Result<Event, MpvError> {
let reason = event let reason = get_key_as!(as_str, "reason", event);
.get("reason") let playlist_entry_id = get_key_as!(as_u64, "playlist_entry_id", event) as usize;
.ok_or(Error(ErrorCode::MissingValue))? let file_error = get_optional_key_as!(as_str, "file_error", event).map(|s| s.to_string());
.as_str() let playlist_insert_id =
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?; get_optional_key_as!(as_u64, "playlist_insert_id", event).map(|i| i as usize);
let playlist_entry_id = event let playlist_insert_num_entries =
.get("playlist_entry_id") get_optional_key_as!(as_u64, "playlist_insert_num_entries", event).map(|i| i as usize);
.ok_or(Error(ErrorCode::MissingValue))?
.as_u64()
.ok_or(Error(ErrorCode::ValueDoesNotContainUsize))? as usize;
let file_error = event
.get("file_error")
.and_then(|v| v.as_str().map(|s| s.to_string()));
let playlist_insert_id = event
.get("playlist_insert_id")
.and_then(|v| v.as_u64().map(|u| u as usize));
let playlist_insert_num_entries = event
.get("playlist_insert_num_entries")
.and_then(|v| v.as_u64().map(|u| u as usize));
Ok(Event::EndFile { Ok(Event::EndFile {
reason: reason reason: reason
@ -241,24 +255,10 @@ fn parse_end_file(event: &Map<String, Value>) -> Result<Event, Error> {
}) })
} }
fn parse_log_message(event: &Map<String, Value>) -> Result<Event, Error> { fn parse_log_message(event: &Map<String, Value>) -> Result<Event, MpvError> {
let prefix = event let prefix = get_key_as!(as_str, "prefix", event).to_owned();
.get("prefix") let level = get_key_as!(as_str, "level", event);
.ok_or(Error(ErrorCode::MissingValue))? let text = get_key_as!(as_str, "text", event).to_owned();
.as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?
.to_string();
let level = event
.get("level")
.ok_or(Error(ErrorCode::MissingValue))?
.as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?;
let text = event
.get("text")
.ok_or(Error(ErrorCode::MissingValue))?
.as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?
.to_string();
Ok(Event::LogMessage { Ok(Event::LogMessage {
prefix, prefix,
@ -269,45 +269,35 @@ fn parse_log_message(event: &Map<String, Value>) -> Result<Event, Error> {
}) })
} }
fn parse_hook(event: &Map<String, Value>) -> Result<Event, Error> { fn parse_hook(event: &Map<String, Value>) -> Result<Event, MpvError> {
let hook_id = event let hook_id = get_key_as!(as_u64, "hook_id", event) as usize;
.get("hook_id")
.ok_or(Error(ErrorCode::MissingValue))?
.as_u64()
.ok_or(Error(ErrorCode::ValueDoesNotContainUsize))? as usize;
Ok(Event::Hook { hook_id }) Ok(Event::Hook { hook_id })
} }
fn parse_client_message(event: &Map<String, Value>) -> Result<Event, Error> { fn parse_client_message(event: &Map<String, Value>) -> Result<Event, MpvError> {
let args = event let args = get_key_as!(as_array, "args", event)
.get("args")
.ok_or(Error(ErrorCode::MissingValue))?
.as_array()
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?
.iter() .iter()
.map(|arg| { .map(|arg| {
arg.as_str() arg.as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString)) .ok_or(MpvError::ValueContainsUnexpectedType {
expected: "string".to_owned(),
received: arg.clone(),
})
.map(|s| s.to_string()) .map(|s| s.to_string())
}) })
.collect::<Result<Vec<String>, Error>>()?; .collect::<Result<Vec<String>, MpvError>>()?;
Ok(Event::ClientMessage { args }) Ok(Event::ClientMessage { args })
} }
fn parse_property_change(event: &Map<String, Value>) -> Result<Event, Error> { fn parse_property_change(event: &Map<String, Value>) -> Result<Event, MpvError> {
let id = event let id = get_key_as!(as_u64, "id", event) as usize;
.get("id") let property_name = get_key_as!(as_str, "name", event);
.ok_or(Error(ErrorCode::MissingValue))?
.as_u64()
.ok_or(Error(ErrorCode::ValueDoesNotContainUsize))? as usize;
let property_name = event
.get("name")
.ok_or(Error(ErrorCode::MissingValue))?
.as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString))?;
let data = event let data = event
.get("data") .get("data")
.ok_or(Error(ErrorCode::MissingValue))? .ok_or(MpvError::MissingKeyInObject {
key: "data".to_owned(),
map: event.clone(),
})?
.clone(); .clone();
Ok(Event::PropertyChange { Ok(Event::PropertyChange {

9
src/event_property_parser.rs
View File

@ -8,7 +8,7 @@ use std::collections::HashMap;
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
use crate::{Error, ErrorCode, Event, MpvDataType, PlaylistEntry}; use crate::{MpvError, Event, MpvDataType, PlaylistEntry};
/// All possible properties that can be observed through the event system. /// All possible properties that can be observed through the event system.
/// ///
@ -46,7 +46,7 @@ pub enum LoopProperty {
} }
/// Parse a highlevel [`Property`] object from json, used for [`Event::PropertyChange`]. /// Parse a highlevel [`Property`] object from json, used for [`Event::PropertyChange`].
pub fn parse_event_property(event: Event) -> Result<(usize, Property), Error> { pub fn parse_event_property(event: Event) -> Result<(usize, Property), MpvError> {
let (id, name, data) = match event { let (id, name, data) = match event {
Event::PropertyChange { id, name, data } => (id, name, data), Event::PropertyChange { id, name, data } => (id, name, data),
// TODO: return proper error // TODO: return proper error
@ -60,7 +60,10 @@ pub fn parse_event_property(event: Event) -> Result<(usize, Property), Error> {
let path = match data { let path = match data {
MpvDataType::String(s) => Some(s), MpvDataType::String(s) => Some(s),
MpvDataType::Null => None, MpvDataType::Null => None,
_ => return Err(Error(ErrorCode::ValueDoesNotContainString)), _ => return Err(MpvError::ValueContainsUnexpectedType {
expected: "String".to_string(),
received: data,
}),
}; };
Ok((id, Property::Path(path))) Ok((id, Property::Path(path)))
} }

98
src/highlevel_api_extension.rs
View File

@ -1,7 +1,7 @@
//! High-level API extension for [`Mpv`]. //! High-level API extension for [`Mpv`].
use crate::{ use crate::{
Error, IntoRawCommandPart, Mpv, MpvCommand, MpvDataType, Playlist, PlaylistAddOptions, MpvError, IntoRawCommandPart, Mpv, MpvCommand, MpvDataType, Playlist, PlaylistAddOptions,
PlaylistEntry, SeekOptions, PlaylistEntry, SeekOptions,
}; };
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
@ -44,58 +44,58 @@ pub enum PlaylistAddTypeOptions {
// TODO: fix this // TODO: fix this
#[allow(async_fn_in_trait)] #[allow(async_fn_in_trait)]
pub trait MpvExt { pub trait MpvExt {
async fn toggle(&self) -> Result<(), Error>; async fn toggle(&self) -> Result<(), MpvError>;
async fn stop(&self) -> Result<(), Error>; async fn stop(&self) -> Result<(), MpvError>;
async fn set_volume(&self, input_volume: f64, option: NumberChangeOptions) async fn set_volume(&self, input_volume: f64, option: NumberChangeOptions)
-> Result<(), Error>; -> Result<(), MpvError>;
async fn set_speed(&self, input_speed: f64, option: NumberChangeOptions) -> Result<(), Error>; async fn set_speed(&self, input_speed: f64, option: NumberChangeOptions) -> Result<(), MpvError>;
async fn set_mute(&self, option: Switch) -> Result<(), Error>; async fn set_mute(&self, option: Switch) -> Result<(), MpvError>;
async fn set_loop_playlist(&self, option: Switch) -> Result<(), Error>; async fn set_loop_playlist(&self, option: Switch) -> Result<(), MpvError>;
async fn set_loop_file(&self, option: Switch) -> Result<(), Error>; async fn set_loop_file(&self, option: Switch) -> Result<(), MpvError>;
async fn seek(&self, seconds: f64, option: SeekOptions) -> Result<(), Error>; async fn seek(&self, seconds: f64, option: SeekOptions) -> Result<(), MpvError>;
async fn playlist_shuffle(&self) -> Result<(), Error>; async fn playlist_shuffle(&self) -> Result<(), MpvError>;
async fn playlist_remove_id(&self, id: usize) -> Result<(), Error>; async fn playlist_remove_id(&self, id: usize) -> Result<(), MpvError>;
async fn playlist_play_next(&self, id: usize) -> Result<(), Error>; async fn playlist_play_next(&self, id: usize) -> Result<(), MpvError>;
async fn playlist_play_id(&self, id: usize) -> Result<(), Error>; async fn playlist_play_id(&self, id: usize) -> Result<(), MpvError>;
async fn playlist_move_id(&self, from: usize, to: usize) -> Result<(), Error>; async fn playlist_move_id(&self, from: usize, to: usize) -> Result<(), MpvError>;
async fn playlist_clear(&self) -> Result<(), Error>; async fn playlist_clear(&self) -> Result<(), MpvError>;
async fn playlist_add( async fn playlist_add(
&self, &self,
file: &str, file: &str,
file_type: PlaylistAddTypeOptions, file_type: PlaylistAddTypeOptions,
option: PlaylistAddOptions, option: PlaylistAddOptions,
) -> Result<(), Error>; ) -> Result<(), MpvError>;
async fn restart(&self) -> Result<(), Error>; async fn restart(&self) -> Result<(), MpvError>;
async fn prev(&self) -> Result<(), Error>; async fn prev(&self) -> Result<(), MpvError>;
async fn pause(&self) -> Result<(), Error>; async fn pause(&self) -> Result<(), MpvError>;
async fn unobserve_property(&self, id: isize) -> Result<(), Error>; async fn unobserve_property(&self, id: isize) -> Result<(), MpvError>;
async fn observe_property(&self, id: isize, property: &str) -> Result<(), Error>; async fn observe_property(&self, id: isize, property: &str) -> Result<(), MpvError>;
async fn next(&self) -> Result<(), Error>; async fn next(&self) -> Result<(), MpvError>;
async fn kill(&self) -> Result<(), Error>; async fn kill(&self) -> Result<(), MpvError>;
async fn get_playlist(&self) -> Result<Playlist, Error>; async fn get_playlist(&self) -> Result<Playlist, MpvError>;
async fn get_metadata(&self) -> Result<HashMap<String, MpvDataType>, Error>; async fn get_metadata(&self) -> Result<HashMap<String, MpvDataType>, MpvError>;
} }
impl MpvExt for Mpv { impl MpvExt for Mpv {
async fn get_metadata(&self) -> Result<HashMap<String, MpvDataType>, Error> { async fn get_metadata(&self) -> Result<HashMap<String, MpvDataType>, MpvError> {
self.get_property("metadata").await self.get_property("metadata").await
} }
async fn get_playlist(&self) -> Result<Playlist, Error> { async fn get_playlist(&self) -> Result<Playlist, MpvError> {
self.get_property::<Vec<PlaylistEntry>>("playlist") self.get_property::<Vec<PlaylistEntry>>("playlist")
.await .await
.map(Playlist) .map(Playlist)
} }
async fn kill(&self) -> Result<(), Error> { async fn kill(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::Quit).await self.run_command(MpvCommand::Quit).await
} }
async fn next(&self) -> Result<(), Error> { async fn next(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::PlaylistNext).await self.run_command(MpvCommand::PlaylistNext).await
} }
async fn observe_property(&self, id: isize, property: &str) -> Result<(), Error> { async fn observe_property(&self, id: isize, property: &str) -> Result<(), MpvError> {
self.run_command(MpvCommand::Observe { self.run_command(MpvCommand::Observe {
id, id,
property: property.to_string(), property: property.to_string(),
@ -103,19 +103,19 @@ impl MpvExt for Mpv {
.await .await
} }
async fn unobserve_property(&self, id: isize) -> Result<(), Error> { async fn unobserve_property(&self, id: isize) -> Result<(), MpvError> {
self.run_command(MpvCommand::Unobserve(id)).await self.run_command(MpvCommand::Unobserve(id)).await
} }
async fn pause(&self) -> Result<(), Error> { async fn pause(&self) -> Result<(), MpvError> {
self.set_property("pause", true).await self.set_property("pause", true).await
} }
async fn prev(&self) -> Result<(), Error> { async fn prev(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::PlaylistPrev).await self.run_command(MpvCommand::PlaylistPrev).await
} }
async fn restart(&self) -> Result<(), Error> { async fn restart(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::Seek { self.run_command(MpvCommand::Seek {
seconds: 0f64, seconds: 0f64,
option: SeekOptions::Absolute, option: SeekOptions::Absolute,
@ -128,7 +128,7 @@ impl MpvExt for Mpv {
file: &str, file: &str,
file_type: PlaylistAddTypeOptions, file_type: PlaylistAddTypeOptions,
option: PlaylistAddOptions, option: PlaylistAddOptions,
) -> Result<(), Error> { ) -> Result<(), MpvError> {
match file_type { match file_type {
PlaylistAddTypeOptions::File => { PlaylistAddTypeOptions::File => {
self.run_command(MpvCommand::LoadFile { self.run_command(MpvCommand::LoadFile {
@ -148,20 +148,20 @@ impl MpvExt for Mpv {
} }
} }
async fn playlist_clear(&self) -> Result<(), Error> { async fn playlist_clear(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::PlaylistClear).await self.run_command(MpvCommand::PlaylistClear).await
} }
async fn playlist_move_id(&self, from: usize, to: usize) -> Result<(), Error> { async fn playlist_move_id(&self, from: usize, to: usize) -> Result<(), MpvError> {
self.run_command(MpvCommand::PlaylistMove { from, to }) self.run_command(MpvCommand::PlaylistMove { from, to })
.await .await
} }
async fn playlist_play_id(&self, id: usize) -> Result<(), Error> { async fn playlist_play_id(&self, id: usize) -> Result<(), MpvError> {
self.set_property("playlist-pos", id).await self.set_property("playlist-pos", id).await
} }
async fn playlist_play_next(&self, id: usize) -> Result<(), Error> { async fn playlist_play_next(&self, id: usize) -> Result<(), MpvError> {
match self.get_property::<usize>("playlist-pos").await { match self.get_property::<usize>("playlist-pos").await {
Ok(current_id) => { Ok(current_id) => {
self.run_command(MpvCommand::PlaylistMove { self.run_command(MpvCommand::PlaylistMove {
@ -174,19 +174,19 @@ impl MpvExt for Mpv {
} }
} }
async fn playlist_remove_id(&self, id: usize) -> Result<(), Error> { async fn playlist_remove_id(&self, id: usize) -> Result<(), MpvError> {
self.run_command(MpvCommand::PlaylistRemove(id)).await self.run_command(MpvCommand::PlaylistRemove(id)).await
} }
async fn playlist_shuffle(&self) -> Result<(), Error> { async fn playlist_shuffle(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::PlaylistShuffle).await self.run_command(MpvCommand::PlaylistShuffle).await
} }
async fn seek(&self, seconds: f64, option: SeekOptions) -> Result<(), Error> { async fn seek(&self, seconds: f64, option: SeekOptions) -> Result<(), MpvError> {
self.run_command(MpvCommand::Seek { seconds, option }).await self.run_command(MpvCommand::Seek { seconds, option }).await
} }
async fn set_loop_file(&self, option: Switch) -> Result<(), Error> { async fn set_loop_file(&self, option: Switch) -> Result<(), MpvError> {
let enabled = match option { let enabled = match option {
Switch::On => "inf", Switch::On => "inf",
Switch::Off => "no", Switch::Off => "no",
@ -203,7 +203,7 @@ impl MpvExt for Mpv {
self.set_property("loop-file", enabled).await self.set_property("loop-file", enabled).await
} }
async fn set_loop_playlist(&self, option: Switch) -> Result<(), Error> { async fn set_loop_playlist(&self, option: Switch) -> Result<(), MpvError> {
let enabled = match option { let enabled = match option {
Switch::On => "inf", Switch::On => "inf",
Switch::Off => "no", Switch::Off => "no",
@ -220,7 +220,7 @@ impl MpvExt for Mpv {
self.set_property("loo-playlist", enabled).await self.set_property("loo-playlist", enabled).await
} }
async fn set_mute(&self, option: Switch) -> Result<(), Error> { async fn set_mute(&self, option: Switch) -> Result<(), MpvError> {
let enabled = match option { let enabled = match option {
Switch::On => "yes", Switch::On => "yes",
Switch::Off => "no", Switch::Off => "no",
@ -237,7 +237,7 @@ impl MpvExt for Mpv {
self.set_property("mute", enabled).await self.set_property("mute", enabled).await
} }
async fn set_speed(&self, input_speed: f64, option: NumberChangeOptions) -> Result<(), Error> { async fn set_speed(&self, input_speed: f64, option: NumberChangeOptions) -> Result<(), MpvError> {
match self.get_property::<f64>("speed").await { match self.get_property::<f64>("speed").await {
Ok(speed) => match option { Ok(speed) => match option {
NumberChangeOptions::Increase => { NumberChangeOptions::Increase => {
@ -258,7 +258,7 @@ impl MpvExt for Mpv {
&self, &self,
input_volume: f64, input_volume: f64,
option: NumberChangeOptions, option: NumberChangeOptions,
) -> Result<(), Error> { ) -> Result<(), MpvError> {
match self.get_property::<f64>("volume").await { match self.get_property::<f64>("volume").await {
Ok(volume) => match option { Ok(volume) => match option {
NumberChangeOptions::Increase => { NumberChangeOptions::Increase => {
@ -275,11 +275,11 @@ impl MpvExt for Mpv {
} }
} }
async fn stop(&self) -> Result<(), Error> { async fn stop(&self) -> Result<(), MpvError> {
self.run_command(MpvCommand::Stop).await self.run_command(MpvCommand::Stop).await
} }
async fn toggle(&self) -> Result<(), Error> { async fn toggle(&self) -> Result<(), MpvError> {
self.run_command_raw("cycle", &["pause"]).await.map(|_| ()) self.run_command_raw("cycle", &["pause"]).await.map(|_| ())
} }
} }

76
src/ipc.rs
View File

@ -8,7 +8,7 @@ use tokio::{
}; };
use tokio_util::codec::{Framed, LinesCodec}; use tokio_util::codec::{Framed, LinesCodec};
use crate::{Error, ErrorCode}; use crate::MpvError;
/// Container for all state that regards communication with the mpv IPC socket /// Container for all state that regards communication with the mpv IPC socket
/// and message passing with [`Mpv`](crate::Mpv) controllers. /// and message passing with [`Mpv`](crate::Mpv) controllers.
@ -30,8 +30,8 @@ pub(crate) enum MpvIpcCommand {
} }
/// [`MpvIpc`]'s response to a [`MpvIpcCommand`]. /// [`MpvIpc`]'s response to a [`MpvIpcCommand`].
#[derive(Debug, Clone)] #[derive(Debug)]
pub(crate) struct MpvIpcResponse(pub(crate) Result<Option<Value>, Error>); pub(crate) struct MpvIpcResponse(pub(crate) Result<Option<Value>, MpvError>);
/// A deserialized and partially parsed event from mpv. /// A deserialized and partially parsed event from mpv.
#[derive(Debug, Clone)] #[derive(Debug, Clone)]
@ -50,28 +50,33 @@ impl MpvIpc {
} }
} }
pub(crate) async fn send_command(&mut self, command: &[Value]) -> Result<Option<Value>, Error> { pub(crate) async fn send_command(
&mut self,
command: &[Value],
) -> Result<Option<Value>, MpvError> {
let ipc_command = json!({ "command": command }); let ipc_command = json!({ "command": command });
let ipc_command_str = serde_json::to_string(&ipc_command) let ipc_command_str =
.map_err(|why| Error(ErrorCode::JsonParseError(why.to_string())))?; serde_json::to_string(&ipc_command).map_err(|why| MpvError::JsonParseError(why))?;
log::trace!("Sending command: {}", ipc_command_str); log::trace!("Sending command: {}", ipc_command_str);
self.socket self.socket
.send(ipc_command_str) .send(ipc_command_str)
.await .await
.map_err(|why| Error(ErrorCode::ConnectError(why.to_string())))?; .map_err(|why| MpvError::MpvSocketConnectionError(why.to_string()))?;
let response = loop { let response = loop {
let response = self let response = self
.socket .socket
.next() .next()
.await .await
.ok_or(Error(ErrorCode::MissingValue))? .ok_or(MpvError::MpvSocketConnectionError(
.map_err(|why| Error(ErrorCode::ConnectError(why.to_string())))?; "Could not receive response from mpv".to_owned(),
))?
.map_err(|why| MpvError::MpvSocketConnectionError(why.to_string()))?;
let parsed_response = serde_json::from_str::<Value>(&response) let parsed_response = serde_json::from_str::<Value>(&response)
.map_err(|why| Error(ErrorCode::JsonParseError(why.to_string()))); .map_err(|why| MpvError::JsonParseError(why));
if parsed_response if parsed_response
.as_ref() .as_ref()
@ -93,7 +98,7 @@ impl MpvIpc {
pub(crate) async fn get_mpv_property( pub(crate) async fn get_mpv_property(
&mut self, &mut self,
property: &str, property: &str,
) -> Result<Option<Value>, Error> { ) -> Result<Option<Value>, MpvError> {
self.send_command(&[json!("get_property"), json!(property)]) self.send_command(&[json!("get_property"), json!(property)])
.await .await
} }
@ -102,7 +107,7 @@ impl MpvIpc {
&mut self, &mut self,
property: &str, property: &str,
value: Value, value: Value,
) -> Result<Option<Value>, Error> { ) -> Result<Option<Value>, MpvError> {
self.send_command(&[json!("set_property"), json!(property), value]) self.send_command(&[json!("set_property"), json!(property), value])
.await .await
} }
@ -111,17 +116,20 @@ impl MpvIpc {
&mut self, &mut self,
id: isize, id: isize,
property: &str, property: &str,
) -> Result<Option<Value>, Error> { ) -> Result<Option<Value>, MpvError> {
self.send_command(&[json!("observe_property"), json!(id), json!(property)]) self.send_command(&[json!("observe_property"), json!(id), json!(property)])
.await .await
} }
pub(crate) async fn unobserve_property(&mut self, id: isize) -> Result<Option<Value>, Error> { pub(crate) async fn unobserve_property(
&mut self,
id: isize,
) -> Result<Option<Value>, MpvError> {
self.send_command(&[json!("unobserve_property"), json!(id)]) self.send_command(&[json!("unobserve_property"), json!(id)])
.await .await
} }
async fn handle_event(&mut self, event: Result<Value, Error>) { async fn handle_event(&mut self, event: Result<Value, MpvError>) {
match &event { match &event {
Ok(event) => { Ok(event) => {
log::trace!("Parsed event: {:?}", event); log::trace!("Parsed event: {:?}", event);
@ -137,17 +145,17 @@ impl MpvIpc {
} }
} }
pub(crate) async fn run(mut self) -> Result<(), Error> { pub(crate) async fn run(mut self) -> Result<(), MpvError> {
loop { loop {
tokio::select! { tokio::select! {
Some(event) = self.socket.next() => { Some(event) = self.socket.next() => {
log::trace!("Got event: {:?}", event); log::trace!("Got event: {:?}", event);
let parsed_event = event let parsed_event = event
.map_err(|why| Error(ErrorCode::ConnectError(why.to_string()))) .map_err(|why| MpvError::MpvSocketConnectionError(why.to_string()))
.and_then(|event| .and_then(|event|
serde_json::from_str::<Value>(&event) serde_json::from_str::<Value>(&event)
.map_err(|why| Error(ErrorCode::JsonParseError(why.to_string())))); .map_err(|why| MpvError::JsonParseError(why)));
self.handle_event(parsed_event).await; self.handle_event(parsed_event).await;
} }
@ -189,20 +197,40 @@ impl MpvIpc {
/// This function does the most basic JSON parsing and error handling /// This function does the most basic JSON parsing and error handling
/// for status codes and errors that all responses from mpv are /// for status codes and errors that all responses from mpv are
/// expected to contain. /// expected to contain.
fn parse_mpv_response_data(value: Value) -> Result<Option<Value>, Error> { fn parse_mpv_response_data(value: Value) -> Result<Option<Value>, MpvError> {
log::trace!("Parsing mpv response data: {:?}", value); log::trace!("Parsing mpv response data: {:?}", value);
let result = value let result = value
.as_object() .as_object()
.map(|o| (o.get("error").and_then(|e| e.as_str()), o.get("data"))) .ok_or(MpvError::ValueContainsUnexpectedType {
.ok_or(Error(ErrorCode::UnexpectedValue)) expected: "object".to_string(),
received: value.clone(),
})
.and_then(|o| {
let error = o
.get("error")
.ok_or(MpvError::MissingKeyInObject {
key: "error".to_string(),
map: o.clone(),
})?
.as_str()
.ok_or(MpvError::ValueContainsUnexpectedType {
expected: "string".to_string(),
received: o.get("error").unwrap().clone(),
})?;
let data = o.get("data");
Ok((error, data))
})
.and_then(|(error, data)| match error { .and_then(|(error, data)| match error {
Some("success") => Ok(data), "success" => Ok(data),
Some(e) => Err(Error(ErrorCode::MpvError(e.to_string()))), err => Err(MpvError::MpvError(err.to_string())),
None => Err(Error(ErrorCode::UnexpectedValue)),
}); });
match &result { match &result {
Ok(v) => log::trace!("Successfully parsed mpv response data: {:?}", v), Ok(v) => log::trace!("Successfully parsed mpv response data: {:?}", v),
Err(e) => log::trace!("Error parsing mpv response data: {:?}", e), Err(e) => log::trace!("Error parsing mpv response data: {:?}", e),
} }
result.map(|opt| opt.cloned()) result.map(|opt| opt.cloned())
} }

99
src/message_parser.rs
View File

@ -4,18 +4,21 @@ use std::collections::HashMap;
use serde_json::Value; use serde_json::Value;
use crate::{Error, ErrorCode, MpvDataType, PlaylistEntry}; use crate::{MpvDataType, MpvError, PlaylistEntry};
pub trait TypeHandler: Sized { pub trait TypeHandler: Sized {
fn get_value(value: Value) -> Result<Self, Error>; fn get_value(value: Value) -> Result<Self, MpvError>;
fn as_string(&self) -> String; fn as_string(&self) -> String;
} }
impl TypeHandler for String { impl TypeHandler for String {
fn get_value(value: Value) -> Result<String, Error> { fn get_value(value: Value) -> Result<String, MpvError> {
value value
.as_str() .as_str()
.ok_or(Error(ErrorCode::ValueDoesNotContainString)) .ok_or(MpvError::ValueContainsUnexpectedType {
expected: "String".to_string(),
received: value.clone(),
})
.map(|s| s.to_string()) .map(|s| s.to_string())
} }
@ -25,10 +28,13 @@ impl TypeHandler for String {
} }
impl TypeHandler for bool { impl TypeHandler for bool {
fn get_value(value: Value) -> Result<bool, Error> { fn get_value(value: Value) -> Result<bool, MpvError> {
value value
.as_bool() .as_bool()
.ok_or(Error(ErrorCode::ValueDoesNotContainBool)) .ok_or(MpvError::ValueContainsUnexpectedType {
expected: "bool".to_string(),
received: value.clone(),
})
} }
fn as_string(&self) -> String { fn as_string(&self) -> String {
@ -41,10 +47,11 @@ impl TypeHandler for bool {
} }
impl TypeHandler for f64 { impl TypeHandler for f64 {
fn get_value(value: Value) -> Result<f64, Error> { fn get_value(value: Value) -> Result<f64, MpvError> {
value value.as_f64().ok_or(MpvError::ValueContainsUnexpectedType {
.as_f64() expected: "f64".to_string(),
.ok_or(Error(ErrorCode::ValueDoesNotContainF64)) received: value.clone(),
})
} }
fn as_string(&self) -> String { fn as_string(&self) -> String {
@ -53,11 +60,14 @@ impl TypeHandler for f64 {
} }
impl TypeHandler for usize { impl TypeHandler for usize {
fn get_value(value: Value) -> Result<usize, Error> { fn get_value(value: Value) -> Result<usize, MpvError> {
value value
.as_u64() .as_u64()
.map(|u| u as usize) .map(|u| u as usize)
.ok_or(Error(ErrorCode::ValueDoesNotContainUsize)) .ok_or(MpvError::ValueContainsUnexpectedType {
expected: "usize".to_string(),
received: value.clone(),
})
} }
fn as_string(&self) -> String { fn as_string(&self) -> String {
@ -65,12 +75,25 @@ impl TypeHandler for usize {
} }
} }
impl TypeHandler for MpvDataType {
fn get_value(value: Value) -> Result<MpvDataType, MpvError> {
json_to_value(&value)
}
fn as_string(&self) -> String {
format!("{:?}", self)
}
}
impl TypeHandler for HashMap<String, MpvDataType> { impl TypeHandler for HashMap<String, MpvDataType> {
fn get_value(value: Value) -> Result<HashMap<String, MpvDataType>, Error> { fn get_value(value: Value) -> Result<HashMap<String, MpvDataType>, MpvError> {
value value
.as_object() .as_object()
.ok_or(Error(ErrorCode::ValueDoesNotContainHashMap)) .ok_or(MpvError::ValueContainsUnexpectedType {
.map(json_map_to_hashmap) expected: "Map<String, Value>".to_string(),
received: value.clone(),
})
.and_then(json_map_to_hashmap)
} }
fn as_string(&self) -> String { fn as_string(&self) -> String {
@ -79,10 +102,13 @@ impl TypeHandler for HashMap<String, MpvDataType> {
} }
impl TypeHandler for Vec<PlaylistEntry> { impl TypeHandler for Vec<PlaylistEntry> {
fn get_value(value: Value) -> Result<Vec<PlaylistEntry>, Error> { fn get_value(value: Value) -> Result<Vec<PlaylistEntry>, MpvError> {
value value
.as_array() .as_array()
.ok_or(Error(ErrorCode::ValueDoesNotContainPlaylist)) .ok_or(MpvError::ValueContainsUnexpectedType {
expected: "Array<Value>".to_string(),
received: value.clone(),
})
.map(|array| json_array_to_playlist(array)) .map(|array| json_array_to_playlist(array))
} }
@ -91,9 +117,9 @@ impl TypeHandler for Vec<PlaylistEntry> {
} }
} }
pub(crate) fn json_to_value(value: &Value) -> Result<MpvDataType, Error> { pub(crate) fn json_to_value(value: &Value) -> Result<MpvDataType, MpvError> {
match value { match value {
Value::Array(array) => Ok(MpvDataType::Array(json_array_to_vec(array))), Value::Array(array) => Ok(MpvDataType::Array(json_array_to_vec(array)?)),
Value::Bool(b) => Ok(MpvDataType::Bool(*b)), Value::Bool(b) => Ok(MpvDataType::Bool(*b)),
Value::Number(n) => { Value::Number(n) => {
if n.is_i64() && n.as_i64().unwrap() == -1 { if n.is_i64() && n.as_i64().unwrap() == -1 {
@ -103,11 +129,13 @@ pub(crate) fn json_to_value(value: &Value) -> Result<MpvDataType, Error> {
} else if n.is_f64() { } else if n.is_f64() {
Ok(MpvDataType::Double(n.as_f64().unwrap())) Ok(MpvDataType::Double(n.as_f64().unwrap()))
} else { } else {
// TODO: proper error handling Err(MpvError::ValueContainsUnexpectedType {
panic!("Unexpected number type"); expected: "i64, u64, or f64".to_string(),
received: value.clone(),
})
} }
} }
Value::Object(map) => Ok(MpvDataType::HashMap(json_map_to_hashmap(map))), Value::Object(map) => Ok(MpvDataType::HashMap(json_map_to_hashmap(map)?)),
Value::String(s) => Ok(MpvDataType::String(s.to_string())), Value::String(s) => Ok(MpvDataType::String(s.to_string())),
Value::Null => Ok(MpvDataType::Null), Value::Null => Ok(MpvDataType::Null),
} }
@ -115,23 +143,16 @@ pub(crate) fn json_to_value(value: &Value) -> Result<MpvDataType, Error> {
pub(crate) fn json_map_to_hashmap( pub(crate) fn json_map_to_hashmap(
map: &serde_json::map::Map<String, Value>, map: &serde_json::map::Map<String, Value>,
) -> HashMap<String, MpvDataType> { ) -> Result<HashMap<String, MpvDataType>, MpvError> {
let mut output_map: HashMap<String, MpvDataType> = HashMap::new(); let mut output_map: HashMap<String, MpvDataType> = HashMap::new();
for (ref key, value) in map.iter() { for (ref key, value) in map.iter() {
// TODO: proper error handling output_map.insert(key.to_string(), json_to_value(value)?);
if let Ok(value) = json_to_value(value) {
output_map.insert(key.to_string(), value);
} }
} Ok(output_map)
output_map
} }
pub(crate) fn json_array_to_vec(array: &[Value]) -> Vec<MpvDataType> { pub(crate) fn json_array_to_vec(array: &[Value]) -> Result<Vec<MpvDataType>, MpvError> {
array array.iter().map(|entry| json_to_value(entry)).collect()
.iter()
// TODO: proper error handling
.filter_map(|entry| json_to_value(entry).ok())
.collect()
} }
pub(crate) fn json_array_to_playlist(array: &[Value]) -> Vec<PlaylistEntry> { pub(crate) fn json_array_to_playlist(array: &[Value]) -> Vec<PlaylistEntry> {
@ -207,7 +228,10 @@ mod test {
)])), )])),
); );
assert_eq!(json_map_to_hashmap(json.as_object().unwrap()), expected); match json_map_to_hashmap(json.as_object().unwrap()) {
Ok(m) => assert_eq!(m, expected),
Err(e) => panic!("{:?}", e),
}
} }
#[test] #[test]
@ -246,7 +270,10 @@ mod test {
)])), )])),
]; ];
assert_eq!(json_array_to_vec(json.as_array().unwrap()), expected); match json_array_to_vec(json.as_array().unwrap()) {
Ok(v) => assert_eq!(v, expected),
Err(e) => panic!("{:?}", e),
}
} }
#[test] #[test]