Implement User model

The mailing list will need to save the data of the subscribers for them
to receive the emails.

Add User model with its DB interactions.

Signed-off-by: Mroik <mroik@delayed.space>

1 files changed, 12 insertions, 8 deletions

diff --git a/src/database.rs b/src/database.rs
index a1d0a18..de77f95 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -1,22 +1,22 @@
 use anyhow::Result;
 use rusqlite::{Connection, Transaction, config::DbConfig};
 
-const DB_NAME: &str = "database.sqlite";
+pub const DB_NAME: &str = "database.sqlite";
 const DB_VERSION: i64 = 0;
 
-struct Database {
+pub struct Database {
     conn: Connection,
 }
 
 impl Database {
-    fn new() -> Result<Self> {
+    pub fn new(db_file: &str) -> Result<Self> {
         let mut init = false;
-        if !std::fs::exists(DB_NAME)? {
+        if !std::fs::exists(db_file)? {
             init = true;
         }
 
         let mut db = Database {
-            conn: Connection::open(DB_NAME)?,
+            conn: Connection::open(db_file)?,
         };
         if init {
             db.initialize()?;
@@ -35,7 +35,7 @@ impl Database {
         tx.execute(q, ())?;
 
         q = "INSERT INTO version VALUES (?)";
-        tx.execute(q, &[&DB_VERSION])?;
+        tx.execute(q, [&DB_VERSION])?;
 
         q = "CREATE TABLE user (
             id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -61,7 +61,10 @@ impl Database {
         Ok(())
     }
 
-    fn execute<Ex>(&mut self, q: Ex) -> Result<QueryResult<Ex::T>> where Ex: DBExecutable {
+    pub fn execute<Ex>(&mut self, q: Ex) -> Result<QueryResult<Ex::T>>
+    where
+        Ex: DBExecutable,
+    {
         let tx = self.conn.transaction()?;
         let ris = q.execute(&tx)?;
         tx.commit()?;
@@ -74,7 +77,8 @@ pub trait DBExecutable {
     fn execute(&self, tx: &Transaction) -> Result<QueryResult<Self::T>>;
 }
 
+#[derive(Debug)]
 pub enum QueryResult<T> {
     Empty,
-    Vec(Vec<T>)
+    Vec(Vec<T>),
 }