Began abstracting functions for database sessions.

src/morethantext/mod.rs

@@ -24,6 +24,12 @@ trait FileData<F> {
     fn from_bytes(data: &mut slice::Iter<u8>) -> Result<F, DBError>;
 }
 
+trait SessionData {
+    fn add(&mut self, key: &str, value: &str, data: &str) -> Result<Vec<String>, DBError>;
+    fn get(&self, key: &str, value: &str) -> Result<Vec<String>, DBError>;
+    fn show(&self, keys: Vec<&str>) -> Result<Vec<String>, DBError>;
+}
+
 #[derive(Clone)]
 pub enum CacheType {
     Raw(String),