commit 17b9e50f1f9b6c0203fb5f7297c14350c52c71b9
Author: Sergey Savelyev <sergeysav.nn@gmail.com>
Date:   Sat Oct 19 13:15:09 2024 -0700

    init

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+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
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+dependencies = [
+ "byteorder",
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
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+ "proc-macro2",
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+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..50d1dc4
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,4 @@
+[workspace]
+members = ["server", "examples/simple_producer"]
+resolver = "2"
+
diff --git a/docs/architecture.md b/docs/architecture.md
new file mode 100644
index 0000000..2a5c8ff
--- /dev/null
+++ b/docs/architecture.md
@@ -0,0 +1,37 @@
+
+# Telemetry Visualization Architecture
+
+## Data Gateway
+A data gateway is a standalone application which connects to a live source of
+data and a consumer of commands.
+While this can be the original producer and end target of the commands, it can
+also be a proxy or middleman application responsible for connecting the end
+application to the telemetry and commanding backend.
+This talks to the Backend's gateway API.
+
+## Backend
+The backend is responsible for acting as a bridge between data gateways and
+the frontend.
+In addition the backend is responsible for recording and providing access to
+historical data.
+
+### Gateway API
+The backend provides an API for gateways to connect and send telemetry and
+receive commands.
+The gateway is responsible for registering the types of commands and
+telemetry which it expects to interface with.
+
+The gateway API is a Websocket API.
+
+### Frontend API
+The backend provides an API for frontends to receive telemetry and send
+commands through the gateway.
+Additionally, the frontend api provides access to save configurations
+for various panels and procedures.
+
+The frontend API is an HTTP and Websocket API.
+
+## Frontend
+
+The frontend is a web-based tool for displaying telemetry and sending
+commands to end devices.
diff --git a/examples/simple_producer/Cargo.toml b/examples/simple_producer/Cargo.toml
new file mode 100644
index 0000000..48ed9c9
--- /dev/null
+++ b/examples/simple_producer/Cargo.toml
@@ -0,0 +1,9 @@
+
+[package]
+name = "simple_producer"
+edition = "2021"
+
+[dependencies]
+server = { path = "../../server" }
+tonic = "0.12.3"
+tokio = { version = "1.40.0", features = ["rt-multi-thread"] }
diff --git a/examples/simple_producer/src/main.rs b/examples/simple_producer/src/main.rs
new file mode 100644
index 0000000..1569b53
--- /dev/null
+++ b/examples/simple_producer/src/main.rs
@@ -0,0 +1,64 @@
+use server::core::telemetry_service_client::TelemetryServiceClient;
+use server::core::telemetry_value::Value;
+use server::core::{TelemetryDataType, TelemetryDefinitionRequest, TelemetryItem, TelemetryValue, Timestamp};
+use std::f32::consts::TAU;
+use std::time::{Duration, SystemTime, UNIX_EPOCH};
+use tokio::sync::mpsc;
+use tokio::time::Instant;
+use tonic::codegen::tokio_stream::wrappers::ReceiverStream;
+use tonic::codegen::tokio_stream::StreamExt;
+use tonic::Request;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut client = TelemetryServiceClient::connect("http://[::1]:50051").await?;
+
+    let request = Request::new(TelemetryDefinitionRequest {
+        name: "simple_producer/sin".into(),
+        data_type: TelemetryDataType::Float32.into(),
+    });
+
+    let response = client.new_telemetry(request).await?.into_inner();
+
+    println!("Response={:?}", response);
+    let Some(uuid) = response.uuid else { return Err("UUID Missing".into()); };
+
+    let (tx, rx) = mpsc::channel(128);
+
+    let mut response_stream = client.insert_telemetry(ReceiverStream::new(rx)).await?.into_inner();
+
+    let mut next_time = Instant::now();
+    let mut index = 0;
+    loop {
+        next_time += Duration::from_millis(100);
+        index += 10;
+        tokio::time::sleep_until(next_time).await;
+        let now = SystemTime::now().duration_since(UNIX_EPOCH)?;
+        tx.send(TelemetryItem {
+            uuid: Some(uuid.clone()),
+            value: Some(TelemetryValue {
+                value: Some(Value::Float32(
+                    (TAU * (index as f32) / (1000.0_f32)).sin()
+                )),
+            }),
+            timestamp: Some(Timestamp {
+                secs: now.as_secs(),
+                nanos: now.subsec_nanos(),
+            }),
+        }).await?;
+        if let Some(response) = response_stream.next().await {
+            match response {
+                Ok(_) => {
+                }
+                Err(_) => {
+                    println!("Error");
+                }
+            }
+        } else {
+            println!("Stream closed");
+            break;
+        }
+    }
+
+    Ok(())
+}
diff --git a/server/Cargo.toml b/server/Cargo.toml
new file mode 100644
index 0000000..3e84239
--- /dev/null
+++ b/server/Cargo.toml
@@ -0,0 +1,18 @@
+
+[package]
+name = "server"
+edition = "2021"
+version = "0.1.0"
+authors = ["Sergey <me@sergeysav.com>"]
+
+[dependencies]
+fern = "0.6.2"
+log = "0.4.22"
+prost = "0.13.3"
+rand = "0.8.5"
+tonic = { version = "0.12.3" }
+tokio = { version = "1.40.0", features = ["rt-multi-thread"] }
+chrono = "0.4.38"
+
+[build-dependencies]
+tonic-build = "0.12.3"
diff --git a/server/build.rs b/server/build.rs
new file mode 100644
index 0000000..cdb3490
--- /dev/null
+++ b/server/build.rs
@@ -0,0 +1,5 @@
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::compile_protos("proto/core.proto")?;
+    Ok(())
+}
diff --git a/server/proto/core.proto b/server/proto/core.proto
new file mode 100644
index 0000000..d523ad8
--- /dev/null
+++ b/server/proto/core.proto
@@ -0,0 +1,48 @@
+
+syntax = "proto3";
+package core;
+
+enum TelemetryDataType {
+    FLOAT_32 = 0;
+    FLOAT_64 = 1;
+}
+
+message TelemetryValue {
+    oneof value {
+        float float_32 = 1;
+        float float_64 = 2;
+    }
+}
+
+message UUID {
+    bytes value = 1;
+}
+
+// UTC since UNIX
+message Timestamp {
+    fixed64 secs = 1;
+    fixed32 nanos = 2;
+}
+
+message TelemetryDefinitionRequest {
+    string name = 1;
+    TelemetryDataType data_type = 2;
+}
+
+message TelemetryDefinitionResponse {
+    UUID uuid = 1;
+}
+
+message TelemetryItem {
+    UUID uuid = 1;
+    TelemetryValue value = 2;
+    Timestamp timestamp = 3;
+}
+
+message TelemetryInsertResponse {
+}
+
+service TelemetryService {
+    rpc NewTelemetry (TelemetryDefinitionRequest) returns (TelemetryDefinitionResponse);
+    rpc InsertTelemetry (stream TelemetryItem) returns (stream TelemetryInsertResponse);
+}
diff --git a/server/src/lib.rs b/server/src/lib.rs
new file mode 100644
index 0000000..5d3e177
--- /dev/null
+++ b/server/src/lib.rs
@@ -0,0 +1,74 @@
+mod uuid;
+
+pub mod core {
+    tonic::include_proto!("core");
+}
+
+use std::error::Error;
+use std::pin::Pin;
+use log::{trace};
+use tokio::sync::mpsc;
+use tonic::{Request, Response, Status, Streaming};
+use tonic::codegen::tokio_stream::{Stream, StreamExt};
+use tonic::codegen::tokio_stream::wrappers::ReceiverStream;
+use tonic::transport::Server;
+use core::telemetry_service_server::TelemetryService;
+use crate::core::{TelemetryDefinitionRequest, TelemetryDefinitionResponse, TelemetryInsertResponse, TelemetryItem, Uuid};
+use crate::core::telemetry_service_server::TelemetryServiceServer;
+
+#[derive(Debug, Default)]
+pub struct CoreTelemetryService {}
+
+#[tonic::async_trait]
+impl TelemetryService for CoreTelemetryService {
+    async fn new_telemetry(&self, request: Request<TelemetryDefinitionRequest>) -> Result<Response<TelemetryDefinitionResponse>, Status> {
+        trace!("TelemetryService::new_telemetry {:?}", request);
+
+        let reply = TelemetryDefinitionResponse {
+            uuid: Some(Uuid::random()),
+        };
+
+        Ok(Response::new(reply))
+    }
+
+    type InsertTelemetryStream = Pin<Box<dyn Stream<Item = Result<TelemetryInsertResponse, Status>> + Send>>;
+
+    async fn insert_telemetry(&self, request: Request<Streaming<TelemetryItem>>) -> Result<Response<Self::InsertTelemetryStream>, Status> {
+        trace!("TelemetryService::insert_telemetry {:?}", request);
+
+        let mut in_stream = request.into_inner();
+        let (tx, rx) = mpsc::channel(128);
+
+        tokio::spawn(async move {
+            while let Some(message) = in_stream.next().await {
+                match message {
+                    Ok(tlm_item) => {
+                        trace!("tlm_item {:?}", tlm_item);
+                        tx
+                            .send(Ok(TelemetryInsertResponse {}))
+                            .await
+                            .expect("working rx");
+                    }
+                    Err(err) => {
+                        let _ = tx.send(Err(err)).await;
+                    }
+                }
+            }
+        });
+
+        Ok(Response::new(Box::pin(ReceiverStream::new(rx))))
+    }
+}
+
+pub async fn setup() -> Result<(), Box<dyn Error>> {
+    let addr = "[::1]:50051".parse()?;
+    let tlm_service = CoreTelemetryService::default();
+
+    Server::builder()
+        .add_service(TelemetryServiceServer::new(tlm_service))
+        .serve(addr)
+        .await?;
+
+    Ok(())
+}
+
diff --git a/server/src/main.rs b/server/src/main.rs
new file mode 100644
index 0000000..3e4634d
--- /dev/null
+++ b/server/src/main.rs
@@ -0,0 +1,30 @@
+use std::env;
+use std::str::FromStr;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let log_file = env::var("LOG_FILE");
+    let log_level = match env::var("LOG_LEVEL") {
+        Ok(log_level) => log::LevelFilter::from_str(&log_level)
+            .unwrap_or(log::LevelFilter::Info),
+        Err(_) => log::LevelFilter::Info
+    };
+
+    let mut log_config = fern::Dispatch::new()
+        .format(|out, message, record| {
+            out.finish(format_args!(
+                "[{}][{}][{}] {}",
+                chrono::Utc::now().format("%Y-%m-%d %H:%M:%S"),
+                record.target(),
+                record.level(),
+                message
+            ))
+        })
+        .level(log_level)
+        .chain(std::io::stdout());
+    if let Ok(log_file) = log_file {
+        log_config = log_config.chain(fern::log_file(log_file)?)
+    }
+    log_config.apply()?;
+    server::setup().await
+}
diff --git a/server/src/uuid.rs b/server/src/uuid.rs
new file mode 100644
index 0000000..270ce31
--- /dev/null
+++ b/server/src/uuid.rs
@@ -0,0 +1,12 @@
+use rand::RngCore;
+use crate::core::{Uuid};
+
+impl Uuid {
+    pub fn random() -> Self {
+        let mut uuid = vec![0u8; 16];
+        rand::thread_rng().fill_bytes(&mut uuid);
+        Self {
+            value: uuid,
+        }
+    }
+}