feat: add user and session entities

src/db/mod.rs

@@ -1,6 +1,7 @@
 mod comment;
 mod event;
 mod plant;
+mod user;
 
 use r2d2_sqlite::{rusqlite, SqliteConnectionManager};
 

src/db/user.rs

@@ -0,0 +1,45 @@
+use rusqlite::Row;
+use serde::{Deserialize, Serialize};
+
+use super::{DbError, DbPool};
+
+#[derive(Serialize, Deserialize)]
+pub struct User {
+    id: i32,
+    username: String,
+    password_hash: String,
+    admin: bool,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct NewUser {
+    username: String,
+    password: String,
+    admin: bool,
+}
+
+impl User {
+    pub fn from_row(row: &Row<'_>) -> Result<Self, rusqlite::Error> {
+        Ok(Self {
+            id: row.get("id")?,
+            username: row.get("username")?,
+            password_hash: row.get("password_hash")?,
+            admin: row.get("admin")?,
+        })
+    }
+}
+
+impl NewUser {
+    pub fn insert(self, pool: &DbPool) -> Result<User, DbError> {
+        let conn = pool.get()?;
+
+        let mut stmt = conn.prepare(
+            "insert into users (username, password_hash, admin) values ($1, $2, $3) returning *",
+        )?;
+
+        Ok(stmt.query_row(
+            (&self.username, &self.password, &self.admin),
+            User::from_row,
+        )?)
+    }
+}

src/migrations/004_auth.sql

@@ -0,0 +1,14 @@
+create table users (
+    id integer primary key,
+    username text unique not null,
+    password_hash text not null,
+    admin boolean not null
+);
+
+create table sessions (
+    id integer primary key,
+    user_id integer not null
+        references users (id)
+        on delete cascade,
+    unique (id, user_id)
+);