major features update

src/db.rs

@@ -0,0 +1,35 @@
+use sqlx::sqlite::{SqliteConnectOptions, SqlitePool, SqlitePoolOptions};
+use std::str::FromStr;
+
+use crate::models::user::User;
+
+pub struct Database {
+    pub pool: SqlitePool,
+}
+
+pub type DbId = i64;
+
+impl Database {
+    pub async fn for_user(user: &User) -> Result<Self, anyhow::Error> {
+        let file = if user.ephemeral {
+            ":memory:".to_string()
+        } else {
+            format!("./dbs/{}.db", user.username)
+        };
+
+        let db_options = SqliteConnectOptions::from_str(&file)?
+            .create_if_missing(true)
+            .to_owned();
+
+        let pool = SqlitePoolOptions::new().connect_with(db_options).await?;
+
+        let migrator = if user.username == "demo" {
+            sqlx::migrate!("./migrations/demo.db/")
+        } else {
+            sqlx::migrate!("./migrations/each_user/")
+        };
+        migrator.run(&pool).await?;
+
+        Ok(Self { pool })
+    }
+}