migrate db to support confirmation emails

migrations/20240226143929_add_status_to_subscriptions.sql

@@ -0,0 +1 @@
+ALTER TABLE subscriptions ADD COLUMN status TEXT NULL;

migrations/20240226144038_make_status_not_null_in_subscriptions.sql

@@ -0,0 +1,8 @@
+BEGIN;
+    -- Backfill `status` for historical entries
+    UPDATE subscriptions
+        SET status = 'confirmed'
+        WHERE status IS NULL;
+    -- Make `status` mandatory
+    ALTER TABLE subscriptions ALTER COLUMN status SET NOT NULL;
+COMMIT;

migrations/20240226144122_create_subscription_tokens_table.sql

@@ -0,0 +1,6 @@
+CREATE TABLE subscription_tokens(
+   subscription_token TEXT NOT NULL,
+   subscriber_id uuid NOT NULL
+      REFERENCES subscriptions (id),
+   PRIMARY KEY (subscription_token)
+);

src/routes/subscriptions.rs

@@ -104,8 +104,8 @@ impl TryFrom<FormData> for NewSubscriber {
 async fn insert_subscriber(new_subscriber: &NewSubscriber, connection_pool: &Pool<Postgres>) -> Result<(), sqlx::Error> {
 	query!(
 		r#"
-		INSERT INTO subscriptions (id, email, name, subscribed_at)
-		VALUES ($1, $2, $3, $4)
+		INSERT INTO subscriptions (id, email, name, subscribed_at, status)
+		VALUES ($1, $2, $3, $4, 'confirmed')
 		"#,
 		Uuid::new_v4(),
 		new_subscriber.email.as_ref(),