2023-04-11 14:01:11 +02:00
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/// TODO better name for this file
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use std::sync::{Arc, Mutex};
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use tracing::{error, warn};
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use uuid::Uuid;
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use crate::{
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opfactory::OperationFactory,
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proto::{buffer_client::BufferClient, BufferPayload, OperationRequest, RawOp},
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tonic::{transport::Channel, Status, Streaming},
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};
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type FactoryHandle = Arc<Mutex<OperationFactory>>;
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impl From::<BufferClient<Channel>> for CodempClient {
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fn from(x: BufferClient<Channel>) -> CodempClient {
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CodempClient {
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id: Uuid::new_v4(),
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client:x,
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factory: Arc::new(Mutex::new(OperationFactory::new(None)))
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}
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}
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}
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#[derive(Clone)]
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pub struct CodempClient {
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id: Uuid,
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client: BufferClient<Channel>,
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factory: FactoryHandle, // TODO less jank solution than Arc<Mutex>
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}
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impl CodempClient {
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pub async fn create(&mut self, path: String, content: Option<String>) -> Result<bool, Status> {
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Ok(
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self.client.create(
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BufferPayload {
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path,
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content,
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user: self.id.to_string(),
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}
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)
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.await?
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.into_inner()
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.accepted
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)
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}
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pub async fn insert(&mut self, path: String, txt: String, pos: u64) -> Result<bool, Status> {
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let res = { self.factory.lock().unwrap().insert(&txt, pos) };
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match res {
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Ok(op) => {
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Ok(
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self.client.edit(
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OperationRequest {
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path,
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hash: "".into(),
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opseq: serde_json::to_string(&op).unwrap(),
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user: self.id.to_string(),
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}
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)
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.await?
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.into_inner()
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.accepted
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)
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},
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Err(e) => Err(Status::internal(format!("invalid operation: {}", e))),
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}
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}
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2023-04-11 14:24:40 +02:00
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pub async fn delete(&mut self, path: String, pos: u64, count: u64) -> Result<bool, Status> {
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let res = { self.factory.lock().unwrap().delete(pos, count) };
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match res {
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Ok(op) => {
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Ok(
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self.client.edit(
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OperationRequest {
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path,
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hash: "".into(),
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opseq: serde_json::to_string(&op).unwrap(),
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user: self.id.to_string(),
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}
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)
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.await?
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.into_inner()
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.accepted
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)
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},
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Err(e) => Err(Status::internal(format!("invalid operation: {}", e))),
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}
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}
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2023-04-11 14:01:11 +02:00
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pub async fn attach<F : Fn(String) -> () + Send + 'static>(&mut self, path: String, callback: F) -> Result<(), Status> {
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let stream = self.client.attach(
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BufferPayload {
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path,
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content: None,
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user: self.id.to_string(),
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}
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)
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.await?
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.into_inner();
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let factory = self.factory.clone();
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tokio::spawn(async move { Self::worker(stream, factory, callback).await } );
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Ok(())
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}
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async fn worker<F : Fn(String) -> ()>(mut stream: Streaming<RawOp>, factory: FactoryHandle, callback: F) {
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loop {
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match stream.message().await {
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Ok(v) => match v {
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Some(operation) => {
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let op = serde_json::from_str(&operation.opseq).unwrap();
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let res = { factory.lock().unwrap().process(op) };
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match res {
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Ok(x) => callback(x),
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Err(e) => break error!("desynched: {}", e),
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}
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}
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None => break warn!("stream closed"),
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},
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Err(e) => break error!("error receiving change: {}", e),
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}
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}
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}
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pub fn content(&self) -> String {
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let factory = self.factory.lock().unwrap();
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factory.content()
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}
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}
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