Saving world to file

src/app/world/mod.rs

@@ -1,6 +1,10 @@
 mod generator;
 pub mod chunk;
 pub mod block;
+use std::path::PathBuf;
+use std::path::Path;
+use std::io::Write;
+use std::fs;
 use cgmath::Point3;
 use std::collections::HashMap;
 use generator::WorldGen;
@@ -21,6 +25,23 @@ impl World {
         }
     }
 
+    pub fn save(&self) {
+        // Get directory
+        let mut dir = dirs::data_local_dir().unwrap();
+        dir.push("Voxelgame");
+        fs::create_dir_all(&dir).expect("Failed to create directory");
+
+        // Save all chunks
+        for (pos, chunk) in self.chunks.iter() {
+            let bytes = chunk.to_bytes();
+            let filename = format!("chunk_{}_{}_{}.dat", pos.x, pos.y, pos.z);
+            let path: PathBuf = [dir.to_str().unwrap(), &filename].iter().collect();
+            
+            let mut file = fs::File::create(path).expect("Failed to create file");
+            file.write(&bytes).unwrap();
+        }
+    }
+
     pub fn gen_block(&mut self, block_pos: &Point3<u32>) -> &WorldBlock {
         // Split world space to chunk and block space
         let ch_pos = block_pos / chunk::SIZE;