feat(core): Add filtering, selection and pagination to users (#6994)

https://linear.app/n8n/issue/PAY-646

packages/cli/src/services/user.service.ts

@@ -4,6 +4,9 @@ import { In } from 'typeorm';
 import { User } from '@db/entities/User';
 import type { IUserSettings } from 'n8n-workflow';
 import { UserRepository } from '@/databases/repositories';
+import { getInstanceBaseUrl } from '@/UserManagement/UserManagementHelper';
+import type { PublicUser } from '@/Interfaces';
+import type { PostHogClient } from '@/posthog';
 
 @Service()
 export class UserService {
@@ -18,7 +21,7 @@ export class UserService {
 	}
 
 	async findMany(options: FindManyOptions<User>) {
-		return this.userRepository.find({ relations: ['globalRole'], ...options });
+		return this.userRepository.find(options);
 	}
 
 	async findOneBy(options: FindOptionsWhere<User>) {
@@ -59,4 +62,54 @@ export class UserService {
 
 		return url.toString();
 	}
+
+	async toPublic(user: User, options?: { withInviteUrl?: boolean; posthog?: PostHogClient }) {
+		const { password, updatedAt, apiKey, authIdentities, ...rest } = user;
+
+		const ldapIdentity = authIdentities?.find((i) => i.providerType === 'ldap');
+
+		let publicUser: PublicUser = {
+			...rest,
+			signInType: ldapIdentity ? 'ldap' : 'email',
+			hasRecoveryCodesLeft: !!user.mfaRecoveryCodes?.length,
+		};
+
+		if (options?.withInviteUrl && publicUser.isPending) {
+			publicUser = this.addInviteUrl(publicUser, user.id);
+		}
+
+		if (options?.posthog) {
+			publicUser = await this.addFeatureFlags(publicUser, options.posthog);
+		}
+
+		return publicUser;
+	}
+
+	private addInviteUrl(user: PublicUser, inviterId: string) {
+		const url = new URL(getInstanceBaseUrl());
+		url.pathname = '/signup';
+		url.searchParams.set('inviterId', inviterId);
+		url.searchParams.set('inviteeId', user.id);
+
+		user.inviteAcceptUrl = url.toString();
+
+		return user;
+	}
+
+	private async addFeatureFlags(publicUser: PublicUser, posthog: PostHogClient) {
+		// native PostHog implementation has default 10s timeout and 3 retries.. which cannot be updated without affecting other functionality
+		// https://github.com/PostHog/posthog-js-lite/blob/a182de80a433fb0ffa6859c10fb28084d0f825c2/posthog-core/src/index.ts#L67
+		const timeoutPromise = new Promise<PublicUser>((resolve) => {
+			setTimeout(() => {
+				resolve(publicUser);
+			}, 1500);
+		});
+
+		const fetchPromise = new Promise<PublicUser>(async (resolve) => {
+			publicUser.featureFlags = await posthog.getFeatureFlags(publicUser);
+			resolve(publicUser);
+		});
+
+		return Promise.race([fetchPromise, timeoutPromise]);
+	}
 }