implement ToBase36 for u64; room id to u64; sprite id to u64; tile id to u64; sprite.dialogue -> sprite.dialogue_id

src/tile.rs

@@ -1,10 +1,10 @@
-use crate::AnimationFrames;
+use crate::{AnimationFrames, from_base36, ToBase36};
 use crate::image::Image;
 use crate::mock;
 
 #[derive(Debug, Eq, PartialEq)]
 pub struct Tile {
-    pub id: String, // base36 string
+    pub id: u64,
     pub name: Option<String>,
     pub wall: bool,
     pub animation_frames: Vec<Image>,
@@ -15,7 +15,7 @@ impl From<String> for Tile {
     fn from(string: String) -> Tile {
         let mut lines: Vec<&str> = string.lines().collect();
 
-        let id = lines[0].replace("TIL ", "");
+        let id = from_base36(&lines[0].replace("TIL ", ""));
 
         let last_line = lines.pop().unwrap();
         let wall = match last_line == "WAL true" {
@@ -50,7 +50,7 @@ impl ToString for Tile {
     fn to_string(&self) -> String {
         format!(
             "TIL {}\n{}{}{}",
-            self.id,
+            self.id.to_base36(),
             self.animation_frames.to_string(),
             if self.name.as_ref().is_some() { format!("\nNAME {}", self.name.as_ref().unwrap())} else {"".to_string() },
             if self.wall {"\nWAL true"} else {""}
@@ -63,7 +63,7 @@ fn test_tile_from_string() {
     let output = Tile::from(include_str!("../test/resources/tile").to_string());
 
     let expected = Tile {
-        id: "z".to_string(),
+        id: 35,
         name: Some("concrete 1".to_string()),
         wall: true,
         animation_frames: vec![
@@ -79,7 +79,7 @@ fn test_tile_from_string() {
 #[test]
 fn test_tile_to_string() {
     let output = Tile {
-        id: "7a".to_string(),
+        id: 262,
         name: Some("chequers".to_string()),
         wall: false,
         animation_frames: vec![