Pass It

A cross-platform Flutter app for sharing and accessing past exam papers across institutions.

Try It Today (APK)

If you just want to install and test quickly:

1. Open the latest release: https://github.com/mahitoh/pass_it/releases/latest
2. Download the app-arm64-v8a-release.apk asset
3. On Android, allow Install unknown apps for your browser/files app
4. Open the APK and install

For best compatibility, also upload and share these split APKs from CI/local build:

• app-arm64-v8a-release.apk (most modern Android phones)
• app-armeabi-v7a-release.apk (older Android phones)
• app-x86_64-release.apk (emulators)

Overview

Pass It is a community-driven platform that enables students and educators to share past exam papers. Users earn points by contributing papers, which can be redeemed for rewards. The app features a gamified experience with leaderboards, streaks, and tier-based rewards.

Features

Core Functionality

• Paper Discovery: Browse exam papers by educational level (University, High School, Secondary, Competitive Exams)
• Search: Full-text search across titles, institutions, courses, and tags
• Paper Detail: View paper metadata, download counts, views, and related information
• PDF Viewer: Integrated PDF viewing with Syncfusion Flutter PDF Viewer
• Bookmarks: Save papers for offline access
• Document Scanner: Scan physical papers using Google ML Kit Document Scanner
• QR Code Scanning: Quick-access papers via QR codes using mobile_scanner
• Offline Support: Cached papers accessible without internet

User System

• Authentication: Supabase Auth with email/password and PKCE flow
• Points System: Earn 50 points per approved paper contribution
• Tier Progression: Bronze (0) → Silver (100) → Gold (300) → Platinum (600)
• Streaks: Daily login streak tracking
• Leaderboard: Top contributors by points

Upload Workflow

• File Upload: Support for PDF files via file_picker
• Metadata Entry: Level, institution, course, year
• Moderation: Pending → Approved/Rejected workflow
• Storage: Supabase Storage bucket for files

Admin Dashboard

• Paper Moderation: Approve or reject pending contributions
• User Management: View and manage user roles
• Institution Management: CRUD operations for institutions
• Analytics: View submission and approval metrics

Technical Features

• Theme Support: Light and dark mode with Material 3
• State Management: Provider pattern with AppState
• Database: Supabase PostgreSQL with Row Level Security
• Storage: Supabase Storage for PDF files
• HTTP: RESTful communication via Supabase client

Demo

Add screenshots and a short demo clip to make first-time visitors trust the app quickly.

• docs/screenshots/home.png
• docs/screenshots/upload.png
• docs/screenshots/profile.png
• docs/demo.gif

Project Structure

lib/
├── main.dart                    # App entry point and auth gate
├── data/
│   ├── app_state.dart          # Global state management
│   ├── supabase_backend.dart   # Supabase API calls
│   ├── supabase_config.dart  # Supabase configuration
│   ├── document_scanner_service.dart
│   ├── upload_pipeline.dart
│   └── pdf_cache_manager.dart
├── screens/
│   ├── home_page.dart        # Main home with feed
│   ├── explore_page.dart     # Search and browse
│   ├── upload_page.dart    # Upload workflow
│   ├── paper_detail_page.dart
│   ├── paper_scanner_page.dart
│   ├── document_scanner_preview_page.dart
│   ├── pdf_viewer_page.dart
│   ├── profile_page.dart    # User profile
│   ├── points_page.dart    # Points and rewards
│   ├── bookmarks_page.dart
│   ├── leaderboard_page.dart
│   ├── notifications_page.dart
│   ├── auth_page.dart      # Login/signup
│   ├── onboarding_page.dart
│   ├── admin_page.dart
│   ├── admin_dashboard_page.dart
│   ├── admin_users_page.dart
│   ├── admin_institutions_page.dart
│   ├── level_papers_page.dart
│   └── competitive_exams_page.dart
├── widgets/
│   └── offline_banner.dart
├── theme/
│   └── app_theme.dart     # Material 3 theming
assets/
└── images/
  └── logo.png

Tech Stack

• Framework: Flutter 3.11+
• Language: Dart 3.11+
• Backend: Supabase (PostgreSQL, Auth, Storage)
• State: Provider + ChangeNotifier

Key Dependencies

Package	Version	Purpose
supabase_flutter	^2.8.0	Backend client
google_fonts	^8.0.2	Typography
file_picker	^11.0.1	File selection
path_provider	^2.1.5	File system paths
syncfusion_flutter_pdfviewer	^33.1.46	PDF rendering
google_mlkit_document_scanner	^0.4.1	Document scanning
mobile_scanner	^7.2.0	QR code scanning
permission_handler	^12.0.1	Runtime permissions
shared_preferences	^2.5.5	Local storage
url_launcher	^6.3.1	External links
connectivity_plus	^6.1.5	Network status

Getting Started

Prerequisites

• Flutter 3.11 or later
• Dart 3.11 or later
• Supabase project (see Supabase Setup below)

Installation

1. Clone the repository:

git clone https://github.com/mahitoh/pass_it.git
cd pass_it

2. Install dependencies:

flutter pub get

3. Configure Supabase (see Supabase Setup below)

4. Run the app:

flutter run

Environment Notes

• Android and iOS require platform setup for file access, scanner, and camera permissions.
• Ensure deep link callback passit://auth-callback matches your Supabase auth config.

Supabase Setup

Database Schema

Create the following tables in your Supabase project:

-- Profiles table
CREATE TABLE profiles (
  id UUID PRIMARY KEY REFERENCES auth.users(id),
  full_name TEXT,
  institution TEXT,
  department TEXT,
  user_type TEXT DEFAULT 'student',
  points_balance INTEGER DEFAULT 0,
  is_verified_uploader BOOLEAN DEFAULT false,
  created_at TIMESTAMPTZ DEFAULT NOW()
);

-- Paper uploads table
CREATE TABLE paper_uploads (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  uploader_id UUID REFERENCES auth.users(id),
  level TEXT NOT NULL,
  institution TEXT NOT NULL,
  course TEXT NOT NULL,
  year INTEGER NOT NULL,
  file_name TEXT NOT NULL,
  file_url TEXT,
  storage_path TEXT,
  status TEXT DEFAULT 'pending',
  downloads INTEGER DEFAULT 0,
  views INTEGER DEFAULT 0,
  created_at TIMESTAMPTZ DEFAULT NOW()
);

-- Enable RLS
ALTER TABLE profiles ENABLE ROW LEVEL SECURITY;
ALTER TABLE paper_uploads ENABLE ROW LEVEL SECURITY;

Storage Bucket

Create a storage bucket named uploads in Supabase Storage.

Row Level Security Policies

-- Profiles: Users can read all, update own
CREATE POLICY "Public profiles are viewable by everyone"
  ON profiles FOR SELECT USING (true);

-- Users can update own profile
CREATE POLICY "Users can update own profile"
  ON profiles FOR UPDATE USING (auth.uid() = id);

-- Papers: Approved papers visible to all
CREATE POLICY "Approved papers visible to everyone"
  ON paper_uploads FOR SELECT USING (status = 'approved');

-- Uploaders can view own papers (all statuses)
CREATE POLICY "Owners can view own papers"
  ON paper_uploads FOR SELECT USING (auth.uid() = uploader_id);

RPC Functions

-- Approve paper (admin only)
CREATE OR REPLACE FUNCTION admin_approve_paper(p_paper_id UUID)
RETURNS JSONB AS $$
BEGIN
  UPDATE paper_uploads
  SET status = 'approved'
  WHERE id = p_paper_id;

  UPDATE profiles
  SET points_balance = points_balance + 50
  WHERE id = (SELECT uploader_id FROM paper_uploads WHERE id = p_paper_id);

  RETURN jsonb_build_object('ok', true, 'status', 'approved');
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;

-- Reject paper (admin only)
CREATE OR REPLACE FUNCTION admin_reject_paper(p_paper_id UUID, p_note TEXT)
RETURNS JSONB AS $$
BEGIN
  UPDATE paper_uploads
  SET status = 'rejected'
  WHERE id = p_paper_id;

  RETURN jsonb_build_object('ok', true, 'status', 'rejected');
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;

-- Increment downloads
CREATE OR REPLACE FUNCTION increment_downloads(paper_id UUID)
RETURNS VOID AS $$
BEGIN
  UPDATE paper_uploads
  SET downloads = downloads + 1
  WHERE id = paper_id;
END;
$$ LANGUAGE plpgsql;

Auth Configuration

1. Enable Email Auth in Supabase Authentication
2. Configure redirect URL: passit://auth-callback
3. Add admin emails to adminEmails in lib/data/supabase_config.dart

Configuration

Supabase Config

Update lib/data/supabase_config.dart:

const String supabaseUrl = 'https://your-project.supabase.co';
const String supabaseAnonKey = 'your-anon-key';
const String supabaseStorageBucket = 'uploads';
const String supabaseTableName = 'paper_uploads';

const List<String> adminEmails = [
  '[email protected]',
];

App Configuration

Update pubspec.yaml:

version: 1.0.0+1

flutter:
  uses-material-design: true

  assets:
    - assets/images/

Building

Debug Build

flutter build apk --debug

Release Build

flutter build apk --release

Optimized APKs For Sharing

flutter build apk --release --split-per-abi

Artifacts are generated in build/app/outputs/flutter-apk/.

iOS Build

flutter build ios --release

Architecture

State Management

The app uses Provider pattern with a central AppState class:

• papers: Public feed of approved papers
• myUploads: User's own uploaded papers
• user: Current user profile
• points: User's points balance
• streak: Daily login streak
• themeMode: Light/dark theme preference

Data Flow

1. App starts → Initialize Supabase
2. Auth gate checks session
3. If authenticated → Hydrate from Supabase
4. Load cached papers for offline access
5. Display home feed of approved papers

Security

• Row Level Security on all tables
• PKCE auth flow for web compatibility
• Admin functions use SECURITY DEFINER
• Storage paths include user ID

Contributing

1. Fork the repository
2. Create a feature branch
3. Make changes following the existing code style
4. Test thoroughly
5. Submit a pull request

Roadmap

• Play Store internal/open testing rollout
• Better moderation tooling for admins
• Smarter paper recommendation and tagging
• In-app release notes and update prompts

License

See LICENSE file for details.

Acknowledgments

• Supabase for backend services
• Syncfusion for PDF viewer
• Google ML Kit for document scanning
• Google Fonts for typography