Export constants to asm file

src/reskit/level/system.rs

@@ -1,5 +1,6 @@
 use std::{error::Error, convert::TryInto, cmp::max, num::ParseIntError};
 use image::GenericImageView;
+use linked_hash_map::LinkedHashMap;
 use linked_hash_set::LinkedHashSet;
 use crate::reskit::{tileset::image_to_tiles, utility::{symbol_to_pascal, print_info}, cli::settings::TileOrder};
 use super::{converter::{TiledTilemap, Layer, SystemPlane}, ecs::Component};
@@ -436,6 +437,7 @@ pub fn get_ecs( tilemap: &TiledTilemap ) -> Result<Vec<u8>, Box<dyn Error>> {
 pub fn get_code( tilemap: &TiledTilemap, level_name: &str, path_prefix: &str ) -> Result<String, Box<dyn Error>> {
     let version = env!( "CARGO_PKG_VERSION" );
     let level_label = symbol_to_pascal( level_name );
+    let level_label_const_caps = level_label.to_uppercase();
     let ( width, height ) = ( tilemap.width, tilemap.height );
     let num_tiles = {
         let mut total_tiles = 0;
@@ -446,9 +448,43 @@ pub fn get_code( tilemap: &TiledTilemap, level_name: &str, path_prefix: &str ) -
 
         total_tiles
     };
+
+    // Output IDs for each type defined in the map
+    let mut component_ids: LinkedHashSet<String> = LinkedHashSet::new();
+    let mut attribute_ids: LinkedHashMap<String, LinkedHashSet<String>> = LinkedHashMap::new();
+    for entity in &tilemap.ecs {
+        let mut components: Vec<String> = entity.components.keys().map( | id | id.to_lowercase() ).collect();
+        components.sort();
+        let components: LinkedHashSet<String> = components.into_iter().collect();
+
+        component_ids.extend( components );
+
+        for ( component_name, component ) in &entity.components {
+            let mut attributes: Vec<String> = component.attributes.keys().map( | id | id.to_lowercase() ).collect();
+            attributes.sort();
+            let attribues: LinkedHashSet<String> = attributes.into_iter().collect();
+
+            attribute_ids.entry( component_name.to_owned() ).or_default().extend( attribues );
+        }
+    }
+
+    let component_ids: Vec<String> = component_ids.into_iter().collect();
+    let mut constants: String = String::new();
+    for i in 0..component_ids.len() {
+        let component_id = &component_ids[ i ];
+        constants += &format!( "{}_{} = {}\n", level_label_const_caps, component_id.to_uppercase(), i );
+
+        let attribute_ids: Vec<String> = attribute_ids[ component_id ].iter().map( | string | string.clone() ).collect();
+        for i in 0..attribute_ids.len() {
+            constants += &format!( "\t{}_{}_{} = {}\n", level_label_const_caps, component_id.to_uppercase(), attribute_ids[ i ].to_uppercase(), i );
+        }
+
+    }
+
     let file = format!( r#"; Level definition file
 ; Generated by reskit v{version}
 
+{constants}
 {level_label}Tiles:
     incbin '{path_prefix}{level_name}/tiles.bin'
 
@@ -472,5 +508,6 @@ pub fn get_code( tilemap: &TiledTilemap, level_name: &str, path_prefix: &str ) -
     dc.l    {level_label}Collision
     dc.l    {level_label}Objects"# );
 
+
     Ok( file )
 }