feat(sso): introduce authentication with SAML

packages/backend/src/models/identity.ee.ts

@@ -0,0 +1,53 @@
+import Base from './base';
+import SamlAuthProvider from './saml-auth-provider.ee';
+import User from './user';
+
+class Identity extends Base {
+  id!: string;
+  remoteId!: string;
+  userId!: string;
+  providerId!: string;
+  providerType!: 'saml';
+
+  static tableName = 'identities';
+
+  static jsonSchema = {
+    type: 'object',
+    required: [
+      'providerId',
+      'remoteId',
+      'userId',
+      'providerType',
+    ],
+
+    properties: {
+      id: { type: 'string', format: 'uuid' },
+      userId: { type: 'string', format: 'uuid' },
+      remoteId: { type: 'string', minLength: 1 },
+      providerId: { type: 'string', format: 'uuid' },
+      providerType: { type: 'string', enum: ['saml'] },
+    },
+  };
+
+  static relationMappings = () => ({
+    user: {
+      relation: Base.BelongsToOneRelation,
+      modelClass: User,
+      join: {
+        from: 'users.id',
+        to: 'identities.user_id',
+      },
+    },
+    samlAuthProvider: {
+      relation: Base.BelongsToOneRelation,
+      modelClass: SamlAuthProvider,
+      join: {
+        from: 'saml_auth_providers.id',
+        to: 'identities.provider_id'
+      },
+    },
+  });
+
+}
+
+export default Identity;