implement db structures for mapping

src/db.rs

@@ -3,6 +3,45 @@ use sqlx::{Sqlite, SqlitePool};
 
 use super::util::make_database_url;
 
+
+#[derive(sqlx::FromRow)]
+pub struct User {
+    pub id: i64,
+    pub tg_id: i64,
+    pub username: Option<String>,
+    pub first_name: String,
+    pub last_name: Option<String>,
+    pub can_download: i64,
+    pub is_admin: i64,
+}
+
+#[derive(sqlx::FromRow)]
+pub struct Chat {
+    pub id: i64,
+    pub tg_id: i64,
+    pub username: Option<String>,
+    pub title: String,
+    pub can_download: i64
+}
+
+#[derive(sqlx::FromRow)]
+pub struct Link {
+    pub id: i64,
+    pub domain: String,
+    pub path: Option<String>,
+    pub download_allowed: i64,
+    pub auto_download: i64
+}
+
+#[derive(sqlx::FromRow)]
+pub struct Request {
+    pub id: i64,
+    pub requested_by: i64,
+    pub approved_by: Option<i64>,
+    pub message: Option<String>,
+    pub is_approved: i64
+}
+
 pub async fn db_init() -> SqlitePool {
     let db_url = make_database_url();
     if !Sqlite::database_exists(&db_url).await.unwrap_or(false) {
@@ -15,4 +54,4 @@ pub async fn db_init() -> SqlitePool {
     sqlx::migrate!().run(&db).await.unwrap();
 
     db
-}
+}