Implement UpdatableAdapter on adapter

This updates the adapter so that we can use `updatePolicy` from the enforcer.

package.json

@@ -9,8 +9,8 @@
     "prepublish": "yarn run lint && yarn build",
     "build": "rimraf lib && tsc",
     "coverage": "jest --coverage --runInBand",
-    "lint": "eslint src/**/*.{ts,tsx,js,jsx}",
-    "fix": "eslint src/**/*.{ts,tsx,js,jsx} --fix",
+    "lint": "eslint \"src/**/*.{ts,js,jsx}\"",
+    "fix": "eslint \"src/**/*.{ts,js,jsx}\" --fix",
     "test": "jest --runInBand",
     "release": "npx -p semantic-release -p @semantic-release/git -p @semantic-release/changelog semantic-release",
     "prepare": "npm run build"
@@ -28,6 +28,7 @@
     "mysql2": "^2.1.0",
     "pg": "^8.4.2",
     "rimraf": "^2.6.2",
+    "sqlite3": "^5.1.7",
     "ts-jest": "28.0.7",
     "typescript": "^5.2.2"
   },

src/adapter.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Helper, Model, FilteredAdapter } from 'casbin';
+import { Helper, Model, FilteredAdapter, UpdatableAdapter } from 'casbin';
 import { CasbinRule } from './casbinRule';
 import {
   DataSource,
@@ -37,7 +37,9 @@ export interface TypeORMAdapterConfig {
 /**
  * TypeORMAdapter represents the TypeORM filtered adapter for policy storage.
  */
-export default class TypeORMAdapter implements FilteredAdapter {
+export default class TypeORMAdapter
+  implements FilteredAdapter, UpdatableAdapter
+{
   private adapterConfig?: TypeORMAdapterConfig;
   private option: DataSourceOptions;
   private typeorm: DataSource;
@@ -257,6 +259,34 @@ export default class TypeORMAdapter implements FilteredAdapter {
     }
   }
 
+  async updatePolicy(
+    sec: string,
+    ptype: string,
+    oldRule: string[],
+    newRule: string[],
+  ): Promise<void> {
+    const { v0, v1, v2, v3, v4, v5, v6 } = this.savePolicyLine(ptype, oldRule);
+    const newLine = this.savePolicyLine(ptype, newRule);
+
+    const foundLine = await this.getRepository().findOneOrFail({
+      where: {
+        ptype,
+        v0,
+        v1,
+        v2,
+        v3,
+        v4,
+        v5,
+        v6,
+      },
+    });
+
+    await this.getRepository().save({
+      ...foundLine,
+      ...newLine,
+    });
+  }
+
   /**
    * removePolicy removes a policy rule from the storage.
    */

test/adapter-config.test.ts

@@ -12,11 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import {Enforcer, setDefaultFileSystem} from 'casbin';
+import { Enforcer, setDefaultFileSystem } from 'casbin';
 import {
   CreateDateColumn,
   DataSource,
   Entity,
+  EntityNotFoundError,
   UpdateDateColumn,
 } from 'typeorm';
 import TypeORMAdapter, { CasbinRule } from '../src/index';
@@ -64,9 +65,36 @@ test(
       // The current policy means the policy in the Node-Casbin enforcer (aka in memory).
       await a.savePolicy(e.getModel());
 
-      const rules = await datasource.getRepository(CustomCasbinRule).find();
+      const repository = datasource.getRepository(CustomCasbinRule);
+      const rules = await repository.find();
       expect(rules[0].createdDate).not.toBeFalsy();
       expect(rules[0].updatedDate).not.toBeFalsy();
+
+      // Verify update method works
+      const initialPolicy = ['bob', 'data3', 'write'];
+      const updatedPolicy = ['bob', 'data3', 'read'];
+      const getCurrentPolicyLinesFromDB = async () => {
+        const policyRow = await repository.findOneByOrFail({
+          v0: initialPolicy[0],
+          v1: initialPolicy[1],
+        });
+        return [policyRow.v0, policyRow.v1, policyRow.v2];
+      };
+
+      await a.addPolicy('', 'p', initialPolicy);
+      expect(await getCurrentPolicyLinesFromDB()).toMatchObject(initialPolicy);
+
+      await a.updatePolicy('', 'p', initialPolicy, updatedPolicy);
+      expect(await getCurrentPolicyLinesFromDB()).toMatchObject(updatedPolicy);
+
+      // We expect that we won't find a read policy anymore
+      await expect(
+        repository.findOneByOrFail({
+          v0: initialPolicy[0],
+          v1: initialPolicy[1],
+          v2: initialPolicy[2],
+        }),
+      ).rejects.toThrow(EntityNotFoundError);
     } finally {
       a.close();
     }

test/config.ts

@@ -1,16 +1,28 @@
 import { DataSourceOptions } from 'typeorm';
 
-export const connectionConfig: DataSourceOptions = {
-  type: 'mysql',
-  host: 'localhost',
-  port: parseInt(process.env.MYSQL_PORT || '', 10) || 3306,
-  username: process.env.MYSQL_USER || 'root',
-  password:
-    process.env.MYSQL_PASSWORD !== undefined
-      ? process.env.MYSQL_PASSWORD === ''
-        ? undefined
-        : process.env.MYSQL_PASSWORD
-      : 'password',
-  database: process.env.MYSQL_DB || 'casbin',
-  dropSchema: true,
-};
+const SHOULD_USE_MYSQL =
+  process.env.MYSQL_USER != null ||
+  process.env.MYSQL_PORT != null ||
+  process.env.MYSQL_PASSWORD != null ||
+  process.env.MYSQL_DB != null;
+
+export const connectionConfig: DataSourceOptions = SHOULD_USE_MYSQL
+  ? {
+      type: 'mysql',
+      host: 'localhost',
+      port: parseInt(process.env.MYSQL_PORT || '', 10) || 3306,
+      username: process.env.MYSQL_USER || 'root',
+      password:
+        process.env.MYSQL_PASSWORD !== undefined
+          ? process.env.MYSQL_PASSWORD === ''
+            ? undefined
+            : process.env.MYSQL_PASSWORD
+          : 'password',
+      database: process.env.MYSQL_DB || 'casbin',
+      dropSchema: true,
+    }
+  : {
+      type: 'sqlite',
+      database: ':memory:',
+      dropSchema: true,
+    };