chore: Typescript database models (#2886)

closes #2798

server/models/decorators/Encrypted.ts

@@ -0,0 +1,30 @@
+import vaults from "@server/database/vaults";
+
+const key = "sequelize:vault";
+
+/**
+ * A decorator that stores the encrypted vault for a particular database column
+ * so that it can be used by getters and setters. Must be accompanied by a
+ * @Column(DataType.BLOB) annotation.
+ */
+export default function Encrypted(target: any, propertyKey: string) {
+  Reflect.defineMetadata(key, vaults().vault(propertyKey), target, propertyKey);
+}
+
+/**
+ * Get the value of an encrypted column given the target and the property key.
+ */
+export function getEncryptedColumn(target: any, propertyKey: string): string {
+  return Reflect.getMetadata(key, target, propertyKey).get.call(target);
+}
+
+/**
+ * Set the value of an encrypted column given the target and the property key.
+ */
+export function setEncryptedColumn(
+  target: any,
+  propertyKey: string,
+  value: string
+) {
+  Reflect.getMetadata(key, target, propertyKey).set.call(target, value);
+}