feat: added basic user management

sparse-server/src/db/user.rs

@@ -1,12 +1,13 @@
-use sqlx::{sqlite::SqlitePool, Database};
 use pbkdf2::{pbkdf2_hmac_array, password_hash::{rand_core::OsRng, SaltString}};
 use sha2::Sha256;
 
+use crate::error::Error;
+
 const PASSWORD_ITERATIONS: u32 = 100_000;
 
-pub async fn reset_password<'a, E>(pool: E, id: i16, password: String) -> anyhow::Result<()>
+pub async fn reset_password<'a, E>(pool: E, id: i16, password: String) -> Result<(), crate::error::Error>
 where
-    E: sqlx::Executor<'a, Database = sqlx::Sqlite>
+    E: sqlx::SqliteExecutor<'a>
 {
     let salt = SaltString::generate(&mut OsRng);
 
@@ -30,3 +31,37 @@ where
 
     Ok(())
 }
+
+pub async fn create_user<'a, E>(acq: E, name: String, password: String) -> Result<(), crate::error::Error>
+where
+    E: sqlx::Acquire<'a, Database = sqlx::Sqlite>
+{
+    let mut tx = acq.begin().await?;
+
+    let previous_user_check = sqlx::query_scalar!(
+        "SELECT COUNT(*) FROM users WHERE user_name = ?",
+        name
+    )
+        .fetch_one(&mut *tx)
+        .await?;
+
+    if previous_user_check > 0 {
+        return Err(Error::UserCreate("User already exists".to_string()));
+    }
+
+    tracing::info!("Creating new user {}", name);
+
+    let new_id = sqlx::query!(
+        r#"INSERT INTO users (user_name, password_salt, password_hash) VALUES (?, "", "")"#,
+        name
+    )
+        .execute(&mut *tx)
+        .await?
+        .last_insert_rowid();
+
+    reset_password(&mut *tx, new_id as i16, password).await?;
+
+    tx.commit().await?;
+
+    Ok(())
+}