Able to output basic structure

src/main.rs

@@ -1,3 +1,4 @@
+pub mod output;
 pub mod tile;
 pub mod tiles;
 
@@ -11,7 +12,7 @@ use uuid::Uuid;
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     // We can't do much until we have a D-Bus connection so just do it synchronously
-    let (resource, conn) = new_session_sync()?;
+    let (resource, _conn) = new_session_sync()?;
 
     // Now start listening on our D-Bus connection
     tokio::spawn(async {
@@ -19,10 +20,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         panic!("Lost connection to D-Bus: {}", err);
     });
 
-    let (mut sender, mut receiver) = channel(1024);
+    let (sender, receiver) = channel(1024);
 
     let instance = Uuid::new_v4().to_string().into_boxed_str();
-    let tiles: Vec<Arc<dyn Tile>> = vec![Arc::new(tiles::Time::new(0, sender.clone(), instance))];
+    let tiles: Vec<Arc<dyn Tile>> = vec![Arc::new(tiles::Time::new(0, sender, instance))];
 
     for tile in &tiles {
         tile.clone().spawn();
@@ -30,18 +31,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let num_tiles = tiles.len();
     tokio::spawn(async move {
-        let mut blocks = Vec::new();
-        blocks.resize_with(num_tiles, Default::default);
-        loop {
-            let message = receiver.recv().await.unwrap();
-            if message.sender_id < num_tiles {
-                blocks[message.sender_id] = Some(message.block);
-            } else {
-                eprintln!("Invalid message with sender id {}", message.sender_id);
-                continue;
-            }
-            eprintln!("Current state: {:?}", blocks);
-        }
+        output::launch(num_tiles, receiver).await.unwrap();
     });
 
     loop {}

src/output.rs

@@ -0,0 +1,23 @@
+use crate::tile::TileData;
+use tokio::io::{self, AsyncWriteExt};
+use tokio::sync::mpsc::Receiver;
+
+pub async fn launch(num_tiles: usize, mut receiver: Receiver<TileData>) -> io::Result<()> {
+    let mut stdout = io::stdout();
+    stdout.write_all(b"{ \"version\": 1 }\n[").await?;
+
+    let mut blocks = Vec::new();
+    blocks.resize_with(num_tiles, Default::default);
+    loop {
+        let message = receiver.recv().await.unwrap();
+        if message.sender_id < num_tiles {
+            blocks[message.sender_id] = Some(message.block);
+        } else {
+            eprintln!("Invalid message with sender id {}", message.sender_id);
+            continue;
+        }
+        let serialized = serde_json::to_vec(&blocks).unwrap();
+        stdout.write_all(&serialized).await?;
+        stdout.write_all(b",\n").await?;
+    }
+}

src/tile.rs

@@ -32,23 +32,35 @@ impl Default for Markup {
 #[derive(Clone, Serialize, Default, Debug)]
 pub struct Block {
     pub full_text: Box<str>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub short_text: Option<Box<str>>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub color: Option<Box<str>>,
-    #[serde(rename = "background")]
+    #[serde(skip_serializing_if = "Option::is_none", rename = "background")]
     pub background_color: Option<Box<str>>,
-    #[serde(rename = "border")]
+    #[serde(skip_serializing_if = "Option::is_none", rename = "border")]
     pub border_color: Option<Box<str>>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub border_top: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub border_right: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub border_bottom: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub border_left: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub min_width: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub align: Option<Alignment>,
     pub name: Box<str>,
     pub instance: Box<str>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub urgent: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub separator: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub separator_block_width: Option<u32>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub markup: Option<Markup>,
 }
 

src/tiles/time.rs

@@ -50,7 +50,7 @@ impl Time {
     async fn run(&self) {
         let mut time = Local::now();
         loop {
-            self.send_time(time).await;
+            self.send_time(time).await.unwrap();
             time = Local::now();
             let millis_part = time.naive_local().timestamp_subsec_millis() as u64;
             let delay_ms = 1000u64 - millis_part % 1000; // Don't crash if we hit a leap second