Loading world, not working yet

src/app/world/mod.rs

@@ -4,6 +4,7 @@ pub mod block;
 use std::path::PathBuf;
 use std::path::Path;
 use std::io::Write;
+use std::io::Read;
 use std::fs;
 use cgmath::Point3;
 use std::collections::HashMap;
@@ -42,6 +43,39 @@ impl World {
         }
     }
 
+    pub fn load(&mut self) {
+        // Get directory
+        let mut dir = dirs::data_local_dir().unwrap();
+        dir.push("Voxelgame");
+        if !dir.is_dir() {
+            println!("Not exists: {:?}", dir);
+            return; 
+        }
+
+        // Load all chunks
+        for entry in fs::read_dir(dir).unwrap() {
+            let path: PathBuf = entry.unwrap().path();
+            if path.extension().unwrap().to_str() != Some("dat") {
+                continue;
+            }
+            let stem = path.file_stem().unwrap().to_str().unwrap();
+            if !stem.starts_with("chunk") {
+                continue;
+            }
+
+            let s: Vec<&str> = stem.split("_").collect();
+            let pos = Point3{x: s[1].parse::<u32>().unwrap(), y: s[2].parse::<u32>().unwrap(), z: s[3].parse::<u32>().unwrap()};
+
+            let mut bytes = Vec::new();
+            let mut file = fs::File::open(path).expect("Failed to open file");
+            file.read_to_end(&mut bytes).expect("Failed to read file");
+            let chunk = WorldChunk::from_bytes(bytes);
+
+            println!("loaded {:?}", pos);
+            self.chunks.insert(pos, chunk);
+        }
+    }
+
     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;