Refactor Store trait to use &String for input. Implement index node serialization.

src/main.rs

@@ -24,5 +24,15 @@ fn main() {
         Ok(x) => x,
     };
 
-    store.get_creds("nya".to_string(), "meow".to_string());
+    let (key, specifier) = ("nya".to_string(), "meow".to_string());
+
+    match store.get_creds(&key, &specifier) {
+        Some(x) => {
+            println!("Credentials: {:?}", x);
+        }
+        None => println!(
+            "Credentials for key '{}' and specifier '{}' not found...",
+            key, specifier
+        ),
+    }
 }

src/store/local.rs

@@ -4,8 +4,7 @@ use std::{
     fs::File,
     hash::{Hash, Hasher},
     io::{BufReader, Read, Seek, SeekFrom, Write},
-    iter::TakeWhile,
-    path::{Iter, Path},
+    path::Path,
 };
 
 use aes_gcm::{aead::Aead, Aes256Gcm, KeyInit, Nonce};
@@ -230,7 +229,7 @@ fn try_create_store(path: &String, passphrase: &Vec<u8>) -> bool {
     let meta = LocalStoreMeta {
         record_count: 0,
         specifier_count: 0,
-        index_node_arity: 64,
+        index_node_arity: 16,
         data_block_size: 8092,
         data_offset: 0,
     };
@@ -254,6 +253,13 @@ fn try_create_store(path: &String, passphrase: &Vec<u8>) -> bool {
     header.chksum_crc = header.get_checksum();
 
     let mut index_block: Vec<u8> = vec![0; meta.data_block_size as usize];
+    let root_node_buf = IndexNode {
+        node_type: IndexNodeType::Leaf,
+        children: Vec::new(),
+    }
+    .serialize(&meta);
+
+    index_block[0..root_node_buf.len()].copy_from_slice(&root_node_buf);
 
     let mut buf = serialize_header(&header);
 
@@ -500,20 +506,25 @@ impl LocalRecord {
 }
 
 impl Store for LocalStore {
-    fn get_creds(&self, specifier: String, key: String) -> Option<StoreRecord> {
-        self.btree_find_key(&key);
+    fn get_creds(&self, specifier: &String, key: &String) -> Option<StoreRecord> {
+        match self.btree_find_key(&key) {
+            Some(x) => {
+                println!("Found: {}", x);
                 todo!()
             }
+            None => return None,
+        }
+    }
 
-    fn get_creds_by_specifier(&self, specifier: String) -> Vec<StoreRecord> {
+    fn get_creds_by_specifier(&self, specifier: &String) -> Vec<StoreRecord> {
         todo!()
     }
 
     fn store_creds(
         &self,
-        specifier: String,
-        key: String,
-        value: Vec<u8>,
+        specifier: &String,
+        key: &String,
+        value: &Vec<u8>,
         r#type: RecordType,
         meta: Option<String>,
     ) {
@@ -521,11 +532,11 @@ impl Store for LocalStore {
     }
 }
 
-#[derive(PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
 enum IndexNodeType {
-    Internal,
-    Leaf,
-    Invalid,
+    Internal = 1,
+    Leaf = 2,
+    Invalid = 0,
 }
 
 impl From<u8> for IndexNodeType {
@@ -557,6 +568,20 @@ impl IndexNode {
     fn len(&self) -> usize {
         self.children.len()
     }
+
+    fn serialize(&self, meta: &LocalStoreMeta) -> Vec<u8> {
+        let mut buf: Vec<u8> = vec![0; 16 * meta.index_node_arity as usize + 2];
+
+        let mut cnt = 2;
+        for child in self.children() {
+            buf[cnt..(cnt + 8)].copy_from_slice(&child.key.to_be_bytes());
+            buf[(cnt + 8)..(cnt + 16)].copy_from_slice(&child.pointer.to_be_bytes());
+            cnt += 16;
+        }
+
+        buf[0] = self.node_type as u8;
+        buf
+    }
 }
 
 impl LocalStore {
@@ -740,7 +765,7 @@ mod tests {
         StoreRecord,
     };
 
-    use super::LocalRecord;
+    use super::{IndexNode, IndexNodeEntry, IndexNodeType, LocalRecord};
 
     #[test]
     fn header_size_const_greater_than_realsize() {
@@ -816,4 +841,62 @@ mod tests {
 
         assert_eq!(serialized, reserialized);
     }
+
+    #[test]
+    fn index_node_serialize() {
+        let root = IndexNode {
+            node_type: IndexNodeType::Internal,
+            children: vec![IndexNodeEntry {
+                key: 1,
+                pointer: 258,
+            }],
+        };
+
+        let leaf = IndexNode {
+            node_type: IndexNodeType::Leaf,
+            children: vec![
+                IndexNodeEntry {
+                    key: 1,
+                    pointer: 516,
+                },
+                IndexNodeEntry {
+                    key: 4,
+                    pointer: 520,
+                },
+                IndexNodeEntry {
+                    key: 16,
+                    pointer: 524,
+                },
+            ],
+        };
+
+        let meta = super::LocalStoreMeta {
+            record_count: 3,
+            specifier_count: 0,
+            index_node_arity: 16,
+            data_block_size: 8192,
+            data_offset: 0,
+        };
+
+        let root_bytes = root.serialize(&meta);
+        let leaf_bytes = leaf.serialize(&meta);
+
+        assert_eq!(IndexNodeType::from(root_bytes[0]), root.node_type);
+        assert_eq!(IndexNodeType::from(leaf_bytes[0]), leaf.node_type);
+
+        assert_eq!(root_bytes[2..10], root.children[0].key.to_be_bytes());
+        assert_eq!(root_bytes[10..18], root.children[0].pointer.to_be_bytes());
+        assert!(root_bytes.iter().skip(18).all(|x| *x == 0u8));
+
+        let mut cnt = 2;
+        for child in leaf.children {
+            assert_eq!(leaf_bytes[cnt..(cnt + 8)], child.key.to_be_bytes());
+            assert_eq!(
+                leaf_bytes[(cnt + 8)..(cnt + 16)],
+                child.pointer.to_be_bytes()
+            );
+            cnt += 16;
+        }
+        assert!(root_bytes.iter().skip(cnt).all(|x| *x == 0u8));
+    }
 }

src/store/mod.rs

@@ -39,13 +39,13 @@ impl From<u8> for RecordType {
 }
 
 pub trait Store {
-    fn get_creds(&self, specifier: String, key: String) -> Option<StoreRecord>;
-    fn get_creds_by_specifier(&self, specifier: String) -> Vec<StoreRecord>;
+    fn get_creds(&self, specifier: &String, key: &String) -> Option<StoreRecord>;
+    fn get_creds_by_specifier(&self, specifier: &String) -> Vec<StoreRecord>;
     fn store_creds(
         &self,
-        specifier: String,
-        key: String,
-        value: Vec<u8>,
+        specifier: &String,
+        key: &String,
+        value: &Vec<u8>,
         r#type: RecordType,
         meta: Option<String>,
     );

src/store/server.rs

@@ -1,6 +1,6 @@
 use reqwest::header::HeaderValue;
 
-use super::{Store, StoreRecord, RecordType};
+use super::{RecordType, Store, StoreRecord};
 
 pub struct ServerStore {
     address: String,
@@ -41,19 +41,19 @@ impl ServerStore {
 }
 
 impl Store for ServerStore {
-    fn get_creds(&self, specifier: String, key: String) -> Option<StoreRecord> {
+    fn get_creds(&self, specifier: &String, key: &String) -> Option<StoreRecord> {
         todo!()
     }
 
-    fn get_creds_by_specifier(&self, specifier: String) -> Vec<StoreRecord> {
+    fn get_creds_by_specifier(&self, specifier: &String) -> Vec<StoreRecord> {
         todo!()
     }
 
     fn store_creds(
         &self,
-        specifier: String,
-        key: String,
-        value: Vec<u8>,
+        specifier: &String,
+        key: &String,
+        value: &Vec<u8>,
         r#type: RecordType,
         meta: Option<String>,
     ) {