Adding data retrival.

src/data/cache.rs

@@ -0,0 +1,120 @@
+pub mod database;
+pub mod global;
+pub mod id;
+mod record;
+pub mod table;
+
+/*
+use std::collections::BTreeMap;
+use uuid::Uuid;
+
+#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Clone, Debug)]
+struct IDPath {
+    path: Vec<Uuid>,
+}
+
+impl IDPath {
+    fn new() -> Self {
+        let mut path = Vec::new();
+        path.push(Uuid::nil());
+        Self { path: path }
+    }
+
+    fn next() -> Uuid {
+        Uuid::new_v4()
+    }
+
+    fn extend(&self, addition: Uuid) -> Self {
+        let mut result = self.clone();
+        result.path.pop();
+        result.path.push(addition);
+        result.path.push(Uuid::nil());
+        result
+    }
+}
+
+#[cfg(test)]
+mod ids {
+    use super::*;
+
+    #[test]
+    fn create_idpath() {
+        let expected = [Uuid::nil()];
+        let id = IDPath::new();
+        assert_eq!(id.path, expected);
+    }
+
+    #[test]
+    fn next_is_random() {
+        let mut ids: Vec<Uuid> = Vec::new();
+        for _ in 0..10 {
+            let id = IDPath::next();
+            assert!(!ids.contains(&id), "{} is a duplicate", id);
+            ids.push(id);
+        }
+    }
+
+    #[test]
+    fn extend_idpath() {
+        let mut path: Vec<Uuid> = Vec::new();
+        path.push(Uuid::nil());
+        let mut id = IDPath::new();
+        for count in 1..5 {
+            assert_eq!(id.path.len(), count);
+            let extended = IDPath::next();
+            id = id.extend(extended.clone());
+            path.pop();
+            path.push(extended);
+            path.push(Uuid::nil());
+            assert_eq!(id.path, path);
+        }
+    }
+}
+*/
+
+struct Cache {
+    data: BTreeMap<String, IDPath>,
+}
+
+impl Cache {
+    fn new() -> Self {
+        Self {
+            data: BTreeMap::new(),
+        }
+    }
+
+    fn add_database<S>(&mut self, name: S)
+    where
+        S: Into<String>,
+    {
+        self.data.insert(name.into(), IDPath::new());
+    }
+
+    fn get_databases(&self) -> Vec<String> {
+        self.data.keys().cloned().collect()
+    }
+}
+
+#[cfg(test)]
+mod caches {
+    use super::*;
+
+    #[test]
+    fn create_cache() {
+        let cache = Cache::new();
+        let dbs = cache.get_databases();
+        assert!(dbs.is_empty());
+    }
+
+    /*
+    #[test]
+    fn add_databases() {
+        let mut cache = Cache::new();
+        cache.add_database("zed");
+        cache.add_database("alpha".to_string());
+        cache.add_database("beta");
+        cache.add_database("gamma".to_string());
+        assert_eq!(cache.get_databases(), ["alpha", "beta", "gamma", "zed"]);
+    }
+    */
+}

src/data/mod.rs

@@ -4,7 +4,12 @@ pub mod id;
 mod record;
 pub mod table;
 
-use std::collections::BTreeMap;
+use std::{
+    collections::BTreeMap,
+    sync::mpsc::{Receiver, Sender, channel},
+    thread::spawn,
+};
+use super::Message;
 use uuid::Uuid;
 
 #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Clone, Debug)]
@@ -33,7 +38,7 @@ impl IDPath {
 }
 
 #[cfg(test)]
-mod ids {
+mod idpaths {
     use super::*;
 
     #[test]
@@ -70,47 +75,42 @@ mod ids {
     }
 }
 
-struct Cache {
-    data: BTreeMap<String, IDPath>,
+struct Data {
+    router_tx: Sender<Message>,
+    data_rx: Receiver<Message>,
 }
 
-impl Cache {
-    fn new() -> Self {
+impl Data {
+    fn new(router_tx: Sender<Message>, data_rx: Receiver<Message>) -> Self {
         Self {
-            data: BTreeMap::new(),
+            router_tx: router_tx,
+            data_rx: data_rx,
         }
     }
 
-    fn add_database<S>(&mut self, name: S)
-    where
-        S: Into<String>,
-    {
-        self.data.insert(name.into(), IDPath::new());
+    pub fn start(router_tx: Sender<Message>) -> Sender<Message> {
+        let (data_tx, data_rx) = channel();
+        spawn(move || {
+            let mut req = Data::new(router_tx, data_rx);
+            req.listen();
+        });
+        data_tx
     }
 
-    fn get_databases(&self) -> Vec<String> {
-        self.data.keys().cloned().collect()
+    fn listen(&mut self) {
+        loop {
+            let msg = self.data_rx.recv().unwrap();
+        }
     }
 }
 
 #[cfg(test)]
-mod caches {
+mod requests {
     use super::*;
 
     #[test]
-    fn create_cache() {
-        let cache = Cache::new();
-        let dbs = cache.get_databases();
-        assert!(dbs.is_empty());
-    }
-
-    #[test]
-    fn add_databases() {
-        let mut cache = Cache::new();
-        cache.add_database("zed");
-        cache.add_database("alpha".to_string());
-        cache.add_database("beta");
-        cache.add_database("gamma".to_string());
-        assert_eq!(cache.get_databases(), ["alpha", "beta", "gamma", "zed"]);
+    fn add_database() {
+        let (tx, rx) = channel();
+        let data_tx = Data::start(tx);
     }
 }

src/lib.rs

@@ -11,6 +11,54 @@ use router::Router;
 use session::{Session, SessionData, SessionMsg};
 use std::sync::mpsc::{channel, Sender};
 
+struct Request;
+
+struct Record;
+
+struct Response {
+    headers: Vec<String>,
+    records: Vec<Record>,
+}
+
+impl Response {
+    fn new() -> Self {
+        Self {
+            headers: Vec::new(),
+            records: Vec::new(),
+        }
+    }
+
+    fn count(&self) -> usize {
+        0
+    }
+
+    fn add_header<S>(&mut self, name: S) where S: Into<String> {
+        self.headers.push(name.into());
+    }
+}
+
+#[cfg(test)]
+mod responses {
+    use super::*;
+
+    #[test]
+    fn create_response() {
+        let res = Response::new();
+        assert!(res.headers.is_empty());
+        assert!(res.records.is_empty());
+        assert_eq!(res.count(), 0);
+    }
+
+    #[test]
+    fn addA_header() {
+        let mut res = Response::new();
+        res.add_header("one");
+        assert_eq!(res.headers, ["one"]);
+        res.add_header("two".to_string());
+        assert_eq!(res.headers, ["one", "two"]);
+    }
+}
+
 /// Support functions for Messages.
 pub trait Msg {
     fn to_msgdata(&self) -> MsgData;