4 files changed, 21 insertions, 9 deletions
diff --git a/server/src/data.rs b/server/src/data.rs
index fd6f266d..17b508ec 100644
--- a/server/src/data.rs
+++ b/server/src/data.rs
@@ -19,13 +19,15 @@ pub enum Action {
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct RecipeDecl {
     #[serde(default)]
-    pub tile: Option<String>,
+    tile: Option<String>,
     #[serde(default)]
-    pub inputs: Vec<String>,
+    inputs: Vec<String>,
     #[serde(default)]
-    pub outputs: Vec<String>,
+    outputs: Vec<String>,
     #[serde(default)]
-    pub action: Action,
+    action: Action,
+    #[serde(default)]
+    warn: bool,
 }
 
 #[derive(Debug, Clone, Deserialize)]
@@ -92,6 +94,7 @@ pub fn build_gamedata(
             Action::Never => {}
             Action::Passive(duration) => recipes.push(Recipe::Passive {
                 duration,
+                warn: r.warn,
                 tile,
                 input: inputs.next().expect("passive recipe without input"),
                 output: outputs.next(),
diff --git a/server/src/game.rs b/server/src/game.rs
index b478c037..a8ea9991 100644
--- a/server/src/game.rs
+++ b/server/src/game.rs
@@ -282,7 +282,8 @@ impl Game {
         for (&pos, tile) in &mut self.tiles {
             if let Some(effect) = tick_tile(dt, &self.data, tile) {
                 match effect {
-                    TickEffect::Progress => self.packet_out.push_back(PacketC::SetActive {
+                    TickEffect::Progress(warn) => self.packet_out.push_back(PacketC::SetActive {
+                        warn,
                         tile: pos,
                         progress: tile
                             .item
diff --git a/server/src/interaction.rs b/server/src/interaction.rs
index 7f694ad8..ef6d5bf7 100644
--- a/server/src/interaction.rs
+++ b/server/src/interaction.rs
@@ -13,6 +13,7 @@ pub enum Recipe {
         tile: Option<TileIndex>,
         input: ItemIndex,
         output: Option<ItemIndex>,
+        warn: bool,
     },
     Active {
         duration: f32,
@@ -42,6 +43,12 @@ impl Recipe {
             _ => None,
         }
     }
+    pub fn warn(&self) -> bool {
+        match self {
+            Recipe::Passive { warn, .. } => *warn,
+            _ => false,
+        }
+    }
     pub fn inputs(&self) -> Vec<ItemIndex> {
         match self {
             Recipe::Passive { input, .. } => vec![*input],
@@ -189,7 +196,7 @@ pub fn interact(
 }
 
 pub enum TickEffect {
-    Progress,
+    Progress(bool),
     Produce,
 }
 pub fn tick_tile(dt: f32, data: &Gamedata, tile: &mut Tile) -> Option<TickEffect> {
@@ -205,7 +212,7 @@ pub fn tick_tile(dt: f32, data: &Gamedata, tile: &mut Tile) -> Option<TickEffect
                     };
                     a.progress = 1.;
                 }
-                return Some(TickEffect::Progress);
+                return Some(TickEffect::Progress(r.warn()));
             }
         } else {
             for (ri, recipe) in data.recipes() {
@@ -220,11 +227,11 @@ pub fn tick_tile(dt: f32, data: &Gamedata, tile: &mut Tile) -> Option<TickEffect
                             recipe: ri,
                             progress: 0.,
                             working: 1,
-                        })
+                        });
+                        return Some(TickEffect::Progress(recipe.warn()));
                     }
                 }
             }
-            return Some(TickEffect::Progress);
         }
     }
     None
diff --git a/server/src/protocol.rs b/server/src/protocol.rs
index a82dad96..305ffa1d 100644
--- a/server/src/protocol.rs
+++ b/server/src/protocol.rs
@@ -96,6 +96,7 @@ pub enum PacketC {
     SetActive {
         tile: IVec2,
         progress: Option<f32>,
+        warn: bool,
     },
     UpdateMap {
         pos: IVec2,