feat: multiple auth methods for identities

backend/src/db/migrations/20241014084900_identity-multiple-auth-methods.ts

@@ -0,0 +1,55 @@
+import { Knex } from "knex";
+
+import { TableName } from "../schemas";
+
+export async function up(knex: Knex): Promise<void> {
+  const hasAuthMethodColumnAccessToken = await knex.schema.hasColumn(TableName.IdentityAccessToken, "authMethod");
+
+  if (!hasAuthMethodColumnAccessToken) {
+    await knex.schema.alterTable(TableName.IdentityAccessToken, (t) => {
+      t.string("authMethod").nullable();
+    });
+
+    // Backfilling: Update the authMethod column in the IdentityAccessToken table to match the authMethod of the Identity
+    await knex(TableName.IdentityAccessToken).update({
+      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+      // @ts-ignore because generate schema happens after this
+      authMethod: knex(TableName.Identity)
+        .select("authMethod")
+        .whereRaw(`${TableName.IdentityAccessToken}."identityId" = ${TableName.Identity}.id`)
+        .whereNotNull("authMethod")
+        .first()
+    });
+
+    // ! We delete all access tokens where the identity has no auth method set!
+    // ! Which means un-configured identities that for some reason have access tokens, will have their access tokens deleted.
+    await knex(TableName.IdentityAccessToken)
+      .whereNotExists((queryBuilder) => {
+        void queryBuilder
+          .select("id")
+          .from(TableName.Identity)
+          .whereRaw(`${TableName.IdentityAccessToken}."identityId" = ${TableName.Identity}.id`)
+          .whereNotNull("authMethod");
+      })
+      .delete();
+
+    // Finally we set the authMethod to notNullable after populating the column.
+    // This will fail if the data is not populated correctly, so it's safe.
+    await knex.schema.alterTable(TableName.IdentityAccessToken, (t) => {
+      t.string("authMethod").notNullable().alter();
+    });
+  }
+
+  // ! We aren't dropping the authMethod column from the Identity itself, because we wan't to be able to easily rollback for the time being.
+}
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+export async function down(knex: Knex): Promise<void> {
+  const hasAuthMethodColumnAccessToken = await knex.schema.hasColumn(TableName.IdentityAccessToken, "authMethod");
+
+  if (hasAuthMethodColumnAccessToken) {
+    await knex.schema.alterTable(TableName.IdentityAccessToken, (t) => {
+      t.dropColumn("authMethod");
+    });
+  }
+}