feat: Implement InteractionAction system for Pom

src/features/pom/actions.rs

@@ -0,0 +1,95 @@
+use crate::prelude::*;
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum InteractionAction {
+    Plant(ItemType),
+}
+
+impl InteractionAction {
+    pub fn get_name(&self, game_config: &GameConfig) -> String {
+        match self {
+            InteractionAction::Plant(item) => format!("Pflanze {}", item.singular(game_config)),
+        }
+    }
+
+    pub fn get_sprite(
+        &self,
+        asset_server: &Res<AssetServer>,
+        game_config: &GameConfig,
+    ) -> Option<AseSlice> {
+        match self {
+            InteractionAction::Plant(item) => Some(item.get_sprite(asset_server, game_config)),
+        }
+    }
+
+    pub fn list_options(
+        tile_state: &TileState,
+        inventory: &Inventory,
+        item_query: Query<&ItemStack>,
+    ) -> Vec<InteractionAction> {
+        let mut options: Vec<InteractionAction> = vec![];
+
+        for &entity in &inventory.items {
+            let Ok(stack) = item_query.get(entity) else {
+                continue;
+            };
+            if stack.amount <= 0 {
+                continue;
+            }
+            println!("1");
+
+            match tile_state {
+                TileState::Empty => match &stack.item_type {
+                    ItemType::BerrySeed { .. } => {
+                        options.push(InteractionAction::Plant(stack.item_type.clone()));
+                    }
+                    _ => (),
+                },
+                _ => (),
+            }
+        }
+
+        options
+    }
+
+    pub fn execute(
+        &self,
+        pos: (u32, u32),
+        grid: &Grid,
+        tile_query: &mut Query<&mut TileState>,
+        inventory: &mut Inventory,
+        item_stack_query: &mut Query<&mut ItemStack>,
+        commands: &mut Commands,
+    ) {
+        let Ok(tile_entity) = grid.get_tile(pos) else {
+            println!("Error during interaction: Couldn't get tile_entity");
+            return;
+        };
+        let Ok(mut tile_state) = tile_query.get_mut(tile_entity) else {
+            println!("Error during interaction: Couldn't get mut tile_state");
+            return;
+        };
+
+        match self {
+            InteractionAction::Plant(seed_type) => {
+                if let TileState::Empty = *tile_state {
+                    if inventory.update_item_stack(
+                        commands,
+                        item_stack_query,
+                        seed_type.clone(),
+                        -1,
+                    ) {
+                        println!("Planting {:?}", seed_type);
+                        *tile_state = TileState::Occupied {
+                            seed: seed_type.clone(),
+                        };
+                    } else {
+                        println!("No {:?} in inventory!", seed_type);
+                    }
+                } else {
+                    println!("Tile is not empty, cannot plant.");
+                }
+            }
+        }
+    }
+}

src/features/pom/components.rs

@@ -1,3 +1,4 @@
+use crate::features::pom::actions::InteractionAction;
 use crate::prelude::*;
 use std::collections::VecDeque;
 
@@ -40,4 +41,5 @@ impl MovingState {
 #[derive(Component, Default)]
 pub struct InteractionTarget {
     pub target: Option<(u32, u32)>,
+    pub action: Option<InteractionAction>,
 }

src/features/pom/messages.rs

@@ -1,3 +1,4 @@
+use crate::features::pom::actions::InteractionAction;
 use crate::prelude::*;
 
 #[derive(Message)]
@@ -15,6 +16,7 @@ pub struct InvalidMoveMessage {
 pub struct InteractStartMessage {
     pub x: u32,
     pub y: u32,
+    pub action: InteractionAction,
 }
 
 #[derive(Message)]

src/features/pom/mod.rs

@@ -5,6 +5,7 @@ use std::collections::VecDeque;
 use utils::find_path;
 use utils::manhattan_distance;
 
+pub mod actions;
 pub mod components;
 pub mod messages;
 pub mod ui;
@@ -71,6 +72,7 @@ fn handle_move(
         for (grid_pos, mut path_queue, mut interaction_target) in pom_query.iter_mut() {
             // Clear any pending interaction when moving manually
             interaction_target.target = None;
+            interaction_target.action = None;
 
             let grid_start = (grid_pos.x, grid_pos.y);
             let start = path_queue.steps.front().unwrap_or(&grid_start);
@@ -108,6 +110,7 @@ fn handle_interact(
             if manhattan_distance(current_pos.0, current_pos.1, target_pos.0, target_pos.1) == 1 {
                 path_queue.steps.clear();
                 interaction_target.target = Some(target_pos);
+                interaction_target.action = Some(message.action.clone());
                 continue;
             }
 
@@ -138,10 +141,12 @@ fn handle_interact(
             if let Some(path) = best_path {
                 path_queue.steps = path;
                 interaction_target.target = Some(target_pos);
+                interaction_target.action = Some(message.action.clone());
             } else {
                 println!("Cannot reach interaction target at {:?}", target_pos);
                 // Don't set target if unreachable
                 interaction_target.target = None;
+                interaction_target.action = None;
             }
         }
     }
@@ -149,8 +154,11 @@ fn handle_interact(
 
 fn perform_interaction(
     mut pom_query: Query<(&GridPosition, &mut InteractionTarget, &PathQueue)>,
-    // grid: Res<Grid>,
-    // mut tile_query: Query<&mut TileState>,
+    grid: Res<Grid>,
+    mut tile_query: Query<&mut TileState>,
+    mut inventory: ResMut<Inventory>,
+    mut item_stack_query: Query<&mut ItemStack>,
+    mut commands: Commands,
 ) {
     for (pos, mut target_component, path_queue) in pom_query.iter_mut() {
         if let Some(target) = target_component.target {
@@ -165,10 +173,20 @@ fn perform_interaction(
                     target.0, target.1
                 );
 
-                // TODO: Implement interaction logic
+                if let Some(action) = &target_component.action {
+                    action.execute(
+                        target,
+                        &grid,
+                        &mut tile_query,
+                        &mut inventory,
+                        &mut item_stack_query,
+                        &mut commands,
+                    );
+                }
             }
 
             target_component.target = None;
+            target_component.action = None;
         }
     }
 }
@@ -248,4 +266,3 @@ fn update_pom(asset_server: Res<AssetServer>, mut query: Query<(&MovingState, &m
         }
     }
 }
-