wip episode actions

migrations/2025-02-23-095541_initial/up.sql

@@ -1,14 +1,17 @@
 create table users (
     id integer primary key not null,
+
     username text unique not null,
     password_hash text not null
 );
 
 create table sessions (
     id bigint primary key not null,
+
     user_id bigint not null
         references users (id)
         on delete cascade,
+
     unique (id, user_id)
 );
 
@@ -28,15 +31,24 @@ create table devices (
 
 create table subscriptions (
     id integer primary key not null,
+
+    url text unique not null
+);
+
+create table device_subscriptions (
+    id integer primary key not null,
+
     device_id bigint not null
         references devices (id)
         on delete cascade,
-    url text not null,
+    subscription_id bigint not null
+        references subscriptions (id)
+        on delete cascade
 
     time_changed bigint not null default 0,
     deleted boolean not null default false,
 
-    unique (device_id, url)
+    unique (device_id, subscription_id)
 );
 
 create table episode_actions (
@@ -44,14 +56,14 @@ create table episode_actions (
 
     subscription_id bigint not null
         references subscriptions (id)
-        on delete cascade,
+        on delete set null,
 
     -- Can be null, as the device is not always provided
     device_id bigint
         references devices (id)
         on delete set null,
 
-    episode text not null,
+    episode_url text not null,
     timestamp bigint,
     action text not null,
     started integer,