🏠 Overview › 🎯 Features ›🎯 REST API Backend

REST API Backend

Feature Detail

high complexity extracted Infrastructure & Platform Confidence: 100%
3
Components
58
Shared
0
User Stories
Yes
Analyzed

Description

This feature establishes the core REST API backend built on Next.js deployed on Vercel, serving as the single communication layer between the Flutter mobile app and all server-side functionality. The API exposes versioned endpoints under /api/v1/... covering authentication, activity registration, contacts, statistics, reimbursements, notifications, and all other domain operations. It also hosts the admin panel under /admin/... routes within the same deployment, eliminating the need for a separate backend service.

User Flow

REST API Backend user flow
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Analysis

Business Value

The REST API backend is the foundational infrastructure that enables every feature in the application. Without it, the Flutter mobile app has no data persistence, authentication, or cross-device synchronization. Centralizing both the mobile API and the admin panel within a single Next.js deployment on Vercel dramatically reduces operational complexity, infrastructure costs, and deployment overhead. This architecture also ensures that business logic remains server-side, protecting sensitive organizational data and enabling consistent enforcement of access control rules across all four user roles.

Implementation Notes

The API is implemented as a Next.js app with route handlers under /api/v1/... using standard HTTP verbs and RESTful conventions. JWT-based authentication is enforced via middleware on all protected routes, with HTTP-only cookies used for the admin panel session and Bearer tokens for the mobile app. Versioning is handled via URL prefix to allow non-breaking evolution. All endpoints return consistent JSON envelopes with status, data, and error fields. The Flutter app uses a centralized REST API client with interceptors for token refresh, retry logic, and error normalization.

Components (61)

Infrastructure (3)

infrastructure API Auth Middleware high infrastructure API Route Infrastructure high infrastructure API Versioning Infrastructure medium

Shared Components

These components are reused across multiple features

Infrastructure (20)

infrastructure JWT Infrastructure medium Shared infrastructure JWT Infrastructure low Shared infrastructure Auth Middleware medium Shared infrastructure Report API Middleware low Shared infrastructure Report Access Guard low Shared infrastructure Approval Audit Logger low Shared infrastructure End-to-End Encryption Infrastructure high Shared infrastructure Email Delivery Infrastructure low Shared infrastructure Invitation Token Infrastructure medium Shared infrastructure Signed URL Provider low Shared infrastructure Multi-Tenancy Infrastructure high Shared infrastructure Calculator Export Infrastructure medium Shared infrastructure Request & Response Interceptors high Shared infrastructure Design Token System medium Shared infrastructure Semantic Labels Infrastructure medium Shared infrastructure Connectivity Infrastructure low Shared infrastructure Local Database Infrastructure high Shared infrastructure Secure Storage Infrastructure medium Shared infrastructure Connection Pool Infrastructure medium Shared infrastructure Database Migration Infrastructure medium Shared

User Stories

No user stories have been generated for this feature yet.