143 lines
4.2 KiB
Rust
143 lines
4.2 KiB
Rust
/*
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* meli - plugins
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*
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* Copyright 2019 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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use super::*;
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#[derive(Debug)]
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pub struct RpcChannel {
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stream: UnixStream,
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session: Uuid,
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}
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#[derive(Debug, Serialize, Deserialize)]
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#[serde(rename_all = "snake_case")]
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pub struct PluginGreeting {
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version: String,
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}
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impl RpcChannel {
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pub fn new(stream: UnixStream, session: &Uuid) -> Result<RpcChannel> {
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let mut ret = RpcChannel {
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stream,
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session: session.clone(),
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};
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let greeting: PluginGreeting = ret.from_read().map_err(|err| {
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MeliError::new(format!("Could not get correct plugin greeting: {}", err))
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})?;
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debug!(&greeting);
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//if greeting.version != "dev" {
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// return Err("Plugin is not compatible with our API (dev)".into());
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//}
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ret.write_ref(&rmpv::ValueRef::String(session.to_string().as_str().into()))?;
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debug!(ret.expect_ack())?;
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Ok(ret)
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}
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pub fn expect_ack(&mut self) -> Result<()> {
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debug!("expect_ack()");
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let ack: u32 = debug!(rmp_serde::decode::from_read(&mut self.stream))
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.map_err(|_| MeliError::new("Plugin did not return ACK."))?;
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if 0x6 == ack {
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Ok(())
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} else {
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Err(MeliError::new("Plugin did not return ACK."))
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}
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}
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pub fn ack(&mut self) -> Result<()> {
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debug!("ack()");
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debug!(rmpv::encode::write_value_ref(
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&mut self.stream,
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&rmpv::ValueRef::Integer(0x6.into())
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))
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.map_err(|err| MeliError::new(err.to_string()))?;
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let _ = self.stream.flush();
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Ok(())
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}
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pub fn write_ref(&mut self, value_ref: &rmpv::ValueRef) -> Result<()> {
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debug!("write_ref() {:?}", value_ref);
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debug!(rmpv::encode::write_value_ref(&mut self.stream, value_ref))
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.map_err(|err| MeliError::new(err.to_string()))?;
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let _ = self.stream.flush();
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Ok(())
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}
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pub fn read(&mut self) -> Result<rmpv::Value> {
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debug!("read()");
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let ret: RpcResult = debug!(rmp_serde::decode::from_read(&mut self.stream))
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.map_err(|err| MeliError::new(err.to_string()))?;
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let _ = self.stream.flush();
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self.ack()?;
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debug!("read() ret={:?}", &ret);
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ret.into()
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}
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pub fn from_read<T>(&mut self) -> Result<T>
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where
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T: core::fmt::Debug + serde::de::DeserializeOwned,
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{
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debug!("from_read()");
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let ret: Result<T> = debug!(rmp_serde::decode::from_read(&mut self.stream))
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.map_err(|err| MeliError::new(err.to_string()));
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let _ = self.stream.flush();
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self.ack()?;
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debug!("read() ret={:?}", &ret);
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ret
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}
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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#[serde(rename_all = "snake_case")]
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#[serde(tag = "t", content = "c")]
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enum RpcResult {
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Ok(rmpv::Value),
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Err(String),
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}
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impl RpcResult {
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fn into(self) -> Result<rmpv::Value> {
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match self {
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RpcResult::Ok(v) => Ok(v),
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RpcResult::Err(err) => Err(MeliError::new(err)),
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}
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}
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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#[serde(rename_all = "snake_case")]
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#[serde(tag = "t", content = "c")]
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pub enum PluginResult<T: core::fmt::Debug + Clone> {
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Ok(T),
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Err(String),
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}
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impl<T: core::fmt::Debug + Clone + serde::Serialize + serde::de::DeserializeOwned> Into<Result<T>>
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for PluginResult<T>
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{
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fn into(self) -> Result<T> {
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match self {
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PluginResult::Ok(v) => Ok(v),
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PluginResult::Err(err) => Err(MeliError::new(err)),
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}
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}
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}
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