Re-add letters migration

migrations/v13.go

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2018-2023 A Bunch Tell LLC.
+ * Copyright © 2021 A Bunch Tell LLC.
  *
  * This file is part of WriteFreely.
  *
@@ -9,3 +9,52 @@
  */
 
 package migrations
+
+func supportLetters(db *datastore) error {
+	t, err := db.Begin()
+	if err != nil {
+		t.Rollback()
+		return err
+	}
+
+	_, err = t.Exec(`CREATE TABLE publishjobs (
+    id ` + db.typeInt() + ` auto_increment,
+    post_id ` + db.typeVarChar(16) + ` not null,
+    action  ` + db.typeVarChar(16) + ` not null,
+    delay   ` + db.typeTinyInt() + ` not null,
+	PRIMARY KEY (id)
+)`)
+	if err != nil {
+		t.Rollback()
+		return err
+	}
+
+	// TODO: fix for SQLite database
+	_, err = t.Exec(`CREATE TABLE emailsubscribers (
+    id            char(8)              not null,
+    collection_id int                  not null,
+    user_id       int                  null,
+    email         varchar(255)         null,
+    subscribed    datetime             not null,
+    token         char(16)             not null,
+    confirmed     tinyint(1) default 0 not null,
+    allow_export  tinyint(1) default 0 not null,
+    constraint eu_coll_email
+        unique (collection_id, email),
+    constraint eu_coll_user
+        unique (collection_id, user_id),
+	PRIMARY KEY (id)
+)`)
+	if err != nil {
+		t.Rollback()
+		return err
+	}
+
+	err = t.Commit()
+	if err != nil {
+		t.Rollback()
+		return err
+	}
+
+	return nil
+}