SIJAR (Sistem Inventaris Peminjaman Barang Jurusan)

SIJAR is a professional-grade inventory and equipment lending management application built for educational environments. It streamlines the lifecycle of departmental assets, ensuring real-time tracking, student accountability, and administrative transparency through a mobile-first approach.

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Core Pillars

• Security & Integrity: Multi-layer protection including SSL Pinning and data encryption to ensure secure communication and storage.
• Dynamic Synchronization: Real-time data consistency across screens using an internal event bus architecture.
• Advanced Media Handling: Robust image processing engine that automatically fixes orientation, resizes, and compresses uploads (Camera/Gallery) for server compatibility.
• User-Centric Design: Fluid Jetpack Compose UI with tactile haptic feedback and localized multilingual support.

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Technical Features

Lending & Inventory

• Smart Catalog: Real-time availability tracking with department-based filtering and autocomplete search.
• Validated Lending Form:
  • Intelligent time-slot selection (Class Periods).
  • Multi-day planning with interactive Date Picker.
  • Automatic handling of expired pending requests (Auto-failed status).
• History Tracking: Categorized records of all historical activities (Approved, Rejected, Cancelled) with monthly grouping.

Security Implementation

• SSL Pinning: Certificate pinning via OkHttp to prevent Man-in-the-Middle (MITM) attacks.
• Encrypted Storage: sensitive user data and tokens are stored using AES-256 GCM encryption via Jetpack Security.
• Obfuscation Ready: Optimized R8/ProGuard configuration for stable and secure release builds.

System Automation

• Background Reminders: Automated return deadlines notifications via WorkManager (60/30 minutes intervals).
• State Persistence: Automatic restoration of UI states during configuration changes (Orientation/Process death).
• Multilingual Support: Dynamic language switching (English/Indonesian) with persistent per-user preferences.

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Tech Stack

Mobile Architecture

• Framework: Jetpack Compose (Declarative UI).
• Pattern: MVVM (Model-View-ViewModel) with Event Bus synchronization.
• DI: Koin for scoped dependency management.
• Networking: Retrofit 2 & OkHttp 5 with SSL Pinner.
• Serialization: GSON with custom deserializers for complex API responses.
• Media: Coil for asynchronous image loading with support for encrypted storage paths.

Backend Infrastructure

• Framework: Laravel 11.
• Environment: Dockerized via Laravel Sail.
• Storage: Secure file system with symbolic linking for asset protection.

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R&D and Quality Assurance

• Debugging Tools:
  • Chucker: In-app HTTP monitoring for real-time API inspection.
  • Flipper: Comprehensive layout and database debugging.
• Performance: Optimized image parser ensures minimal memory footprint and fast uploads even with high-resolution camera input.
• Release Stability: Fully tested for 16 KB page size compatibility on Android 15.

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Setup Guide

1. Environment: Ensure Laravel Sail is active and storage links are generated (php artisan storage:link).
2. Connectivity:
   • Update ApiClient.BASE_URL in the Android source to your server endpoint.
   • For local development, use 10.0.2.2 (Emulator) or your LAN IP.
3. Build: Use the debug variant for inspection tools or release for production performance testing.

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