basic field drawer and basic timer implementation

game_core/src/field/loader/loader.rs

@@ -1,5 +1,5 @@
 use crate::field::field::Field;
 
 pub trait FieldLoader {
-    fn load(field_id: String) -> Field;
+    fn load(&self, field_id: String) -> Field;
 }

game_core/src/field/loader/plain_text_loader.rs

@@ -5,11 +5,11 @@ use std::fs;
 pub struct PlainTextFieldLoader;
 
 impl FieldLoader for PlainTextFieldLoader {
-    fn load(field_id: String) -> Field {
+    fn load(&self, field_id: String) -> Field {
         let content = fs::read_to_string(&field_id)
             .expect("Could not read field file");
 
-        let lines: Vec<&str> = content.lines().collect();
+        let lines: Vec<&str> = content.lines().filter(|l| !l.is_empty()).collect();
         let height = lines.len();
         let width = lines.iter().map(|l| l.len()).max().unwrap_or(0);
 
@@ -42,7 +42,7 @@ mod tests {
 
         fs::write(test_file, level_data).expect("Could not write test file");
 
-        let field = PlainTextFieldLoader::load(test_file.to_string());
+        let field = PlainTextFieldLoader{}.load(test_file.to_string());
 
         let _ = fs::remove_file(test_file);