Refactor search algo. Set enum from(u8) functions to implement the From<u8> trait.

.vscode/launch.json

@@ -9,6 +9,15 @@
         "args": ["build"]
       },
       "args": []
+    },
+    {
+      "type": "lldb",
+      "request": "launch",
+      "name": "Cargo test",
+      "cargo": {
+        "args": ["test"]
+      },
+      "args": []
     }
   ]
 }

src/store/local.rs

@@ -98,7 +98,7 @@ struct LocalStoreMeta {
     specifier_count: u32,
     index_node_arity: u16,
     data_block_size: u32,
-    data_offset: u64
+    data_offset: u64,
 }
 
 struct EncryptionContext {
@@ -231,7 +231,7 @@ fn try_create_store(path: &String, passphrase: &Vec<u8>) -> bool {
         specifier_count: 0,
         index_node_arity: 64,
         data_block_size: 8092,
-        data_offset: 0
+        data_offset: 0,
     };
 
     superblock_buf.append(&mut serialize_store_meta(&meta));
@@ -315,14 +315,12 @@ fn deserialize_store_meta(data: &[u8]) -> LocalStoreMeta {
     let data_block_size = u32::from_be_bytes(data[10..14].try_into().unwrap());
     let data_offset = u64::from_be_bytes(data[14..22].try_into().unwrap());
 
- 
-
     LocalStoreMeta {
         record_count: records,
         specifier_count: specifiers,
         index_node_arity,
         data_block_size,
-        data_offset
+        data_offset,
     }
 }
 
@@ -519,8 +517,30 @@ impl Store for LocalStore {
     }
 }
 
+enum IndexNodeType {
+    Internal,
+    Leaf,
+    Invalid,
+}
+
+impl From<u8> for IndexNodeType {
+    fn from(value: u8) -> Self {
+        match value {
+            0 => IndexNodeType::Invalid,
+            1 => IndexNodeType::Internal,
+            2 => IndexNodeType::Leaf,
+            _ => panic!("Invalid value {}", value),
+        }
+    }
+}
+
+struct IndexNode {
+    node_type: IndexNodeType,
+    children: [u64],
+}
+
 impl LocalStore {
-    fn btree_find_key(&self, key: &String) {
+    fn btree_find_key(&self, key: &String) -> Option<u64> {
         let mut file: BufReader<File> =
             BufReader::new(File::open(&self.path).expect("Cannot open file"));
 
@@ -531,21 +551,35 @@ impl LocalStore {
         };
 
         let pos = file.seek(SeekFrom::Start(0x90)).unwrap();
-       
-        let mut buf: [u8; 16] = [0; 16];
-        file.read_exact(&mut buf).expect("Read error");
 
-        let key = u64::from_be_bytes(buf[0..8].try_into().unwrap()); 
+        let mut read_node_type = || {
+            let mut buf: [u8; 2] = [0; 2];
+            file.read_exact(&mut buf).expect("Cannot read node type.");
+            IndexNodeType::from(buf[0])
+        };
 
-        if hash > key {
-            //advance
-            todo!();
+        let mut read_key_pos = || {
+            let mut buf: [u8; 16] = [0; 16];
+            file.read_exact(&mut buf).expect("Read error");
+
+            (
+                u64::from_be_bytes(buf[0..8].try_into().unwrap()),
+                u64::from_be_bytes(buf[8..16].try_into().unwrap()),
+            )
+        };
+
+        let mut subnode_pos = 0;
+        loop {
+            let (key, offset) = read_key_pos();
+
+            if hash > key {
+                if subnode_pos > self.meta.index_node_arity {
+                    return None;
+                }
+                subnode_pos += 1;
+                continue;
+            }
         }
-
-        let pointer = u64::from_be_bytes(buf[8..16].try_into().unwrap());
-        let pos2 = file.seek(SeekFrom::Start(pointer)).unwrap();
-
-        println!("Pos: {:x} 2: {:x}", pos, pos2);
     }
 }
 
@@ -672,7 +706,7 @@ mod tests {
                 key: "meow".to_owned(),
                 meta: None,
                 specifier: "test".to_owned(),
-                r#type: crate::store::RecordType::LOGIN_PASSWORD,
+                r#type: crate::store::RecordType::LoginPassword,
                 value: vec![1, 2, 3, 4],
             },
         };

src/store/mod.rs

@@ -12,25 +12,25 @@ pub struct StoreRecord {
 
 #[derive(Clone, Copy, PartialEq, PartialOrd, Debug)]
 pub enum RecordType {
-    LOGIN_PASSWORD = 0,
-    PASSWORD = 1,
-    SSH_KEY = 2,
-    PGP_KEY = 3,
-    SYM_KEY = 4,
-    ASYM_KEY_PAIR = 5,
-    ASYM_PRIV_KEY = 6,
+    LoginPassword = 0,
+    Password = 1,
+    SSHKey = 2,
+    PGPKey = 3,
+    SymKey = 4,
+    AsymKeyPair = 5,
+    AsymPrivKey = 6,
 }
 
-impl RecordType {
-    pub fn from(n: u8) -> Self {
+impl From<u8> for RecordType {
+    fn from(n: u8) -> Self {
         match n {
-            0 => RecordType::LOGIN_PASSWORD,
-            1 => RecordType::PASSWORD,
-            2 => RecordType::SSH_KEY,
-            3 => RecordType::PGP_KEY,
-            4 => RecordType::SYM_KEY,
-            5 => RecordType::ASYM_KEY_PAIR,
-            6 => RecordType::ASYM_PRIV_KEY,
+            0 => RecordType::LoginPassword,
+            1 => RecordType::Password,
+            2 => RecordType::SSHKey,
+            3 => RecordType::PGPKey,
+            4 => RecordType::SymKey,
+            5 => RecordType::AsymKeyPair,
+            6 => RecordType::AsymPrivKey,
             _ => panic!("Invalid value '{}'.", n),
         }
     }
@@ -56,8 +56,8 @@ pub enum EncryptionType {
     Chacha20Poly1305 = 2,
 }
 
-impl EncryptionType {
-    pub fn from(n: u8) -> Self {
+impl From<u8> for EncryptionType {
+    fn from(n: u8) -> Self {
         match n {
             0 => EncryptionType::Invalid,
             1 => EncryptionType::AesGcm,
@@ -75,8 +75,8 @@ pub enum HashType {
     Pbkdf2 = 4,
 }
 
-impl HashType {
-    pub fn from(n: u8) -> Self {
+impl From<u8> for HashType {
+    fn from(n: u8) -> Self {
         match n {
             0 => HashType::Invalid,
             1 => HashType::Argon2,