613 lines
19 KiB
Markdown
613 lines
19 KiB
Markdown
# Product Requirements Document (PRD)
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## SelfieCam - Professional Selfie Camera App
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**Version:** 1.0
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**Platform:** iOS 18.0+
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**Language:** Swift 6 with strict concurrency
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**Framework:** SwiftUI
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---
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## Executive Summary
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SelfieCam is a professional-grade selfie camera app featuring a customizable screen-based ring light overlay, premium camera controls, and beautiful branding. The app targets content creators, makeup artists, video call professionals, and anyone who needs flattering lighting for selfies.
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---
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## Target Audience
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- Content creators and influencers
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- Makeup artists and beauty professionals
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- Video call and streaming professionals
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- Casual users seeking better selfie lighting
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- Portrait photographers needing on-the-go lighting
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---
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## Technical Requirements
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### Platform & Tools
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| Requirement | Specification |
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| iOS Deployment Target | iOS 18.0+ |
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| Swift Version | Swift 6 with strict concurrency checking |
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| UI Framework | SwiftUI (primary) |
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| Persistence | iCloud via CloudSyncManager |
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| Subscriptions | RevenueCat SDK |
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| Camera | MijickCamera framework |
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| Design System | Bedrock (local package) |
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### Architecture Principles
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1. **Protocol-Oriented Programming (POP)** - All shared capabilities defined via protocols before concrete types
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2. **MVVM-lite** - Views are "dumb" renderers; all logic lives in `@Observable` view models
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3. **Bedrock Design System** - Centralized design tokens, no magic numbers
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- Settings layout contract: `SettingsCard` owns horizontal insets, custom rows use `SettingsCardRow`, and in-card separators use `SettingsDivider`
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4. **Full Accessibility** - Dynamic Type, VoiceOver labels/hints/traits/announcements
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5. **Modern Swift & SwiftUI** - Swift 6 concurrency, `@MainActor`, modern APIs
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6. **Testable & Reusable Design** - Protocols enable mocking and future package extraction
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---
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## Feature Requirements
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### FR-100: Core Camera System
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#### FR-101: Camera Preview
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- **Priority:** P0 (Critical)
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- **Description:** Full-screen camera preview with real-time display
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- **Acceptance Criteria:**
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- [ ] Smooth, low-latency camera preview
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- [ ] Supports both front and back camera
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- [ ] Camera switching via UI button
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- [ ] Prevents screen dimming during camera use
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- [ ] Uses MijickCamera framework for SwiftUI-native handling
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#### FR-102: Photo Capture
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- **Priority:** P0 (Critical)
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- **Description:** High-quality photo capture with multiple trigger methods
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- **Acceptance Criteria:**
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- [ ] Capture button triggers photo capture
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- [ ] Volume buttons trigger capture (hardware shutter)
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- [ ] Camera Control button full press triggers capture (iPhone 16+)
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- [ ] Post-capture preview with share functionality
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- [ ] Auto-save option to Photo Library
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#### FR-103: Zoom Control
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- **Priority:** P1 (High)
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- **Description:** Pinch-to-zoom gesture support
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- **Acceptance Criteria:**
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- [ ] Smooth pinch-to-zoom interpolation
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- [ ] Zoom level persists during session
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- [ ] Zoom resets on camera switch (optional behavior)
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#### FR-104: Camera Control Button Support
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- **Priority:** P2 (Medium)
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- **Description:** iPhone 16+ Camera Control button integration
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- **Acceptance Criteria:**
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- [ ] Full press triggers photo capture
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- [ ] Light press locks focus/exposure (if API available)
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- [ ] Uses `AVCaptureEventInteraction` (iOS 17.2+)
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- **Known Limitations:**
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- Light press may be restricted to first-party apps
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- Swipe-to-zoom is Apple-exclusive API
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---
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### FR-200: Ring Light System
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#### FR-201: Ring Light Overlay
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- **Priority:** P0 (Critical)
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- **Description:** Screen-based ring light effect using colored border
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- **Acceptance Criteria:**
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- [ ] Configurable border thickness (10-120pt range)
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- [ ] Border renders around camera preview
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- [ ] Quick enable/disable toggle
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- [ ] Smooth transition animations
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#### FR-202: Ring Light Colors
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- **Priority:** P0 (Critical)
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- **Description:** Multiple color temperature presets
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- **Free Colors:**
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- Pure White
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- Warm Cream
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- **Premium Colors:**
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- Ice Blue
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- Soft Pink
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- Warm Amber
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- Cool Lavender
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- **Acceptance Criteria:**
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- [ ] Color picker UI with visual swatches
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- [ ] Premium colors show lock indicator for free users
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- [ ] Premium users can access custom color picker
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#### FR-203: Ring Light Brightness
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- **Priority:** P1 (High)
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- **Description:** Adjustable ring light opacity/brightness
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- **Acceptance Criteria:**
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- [ ] Slider control for brightness (10%-100%)
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- [ ] Real-time preview of brightness changes
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- [ ] Debounced saving (300ms) to prevent excessive iCloud writes
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---
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### FR-300: Flash System
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#### FR-301: Flash Modes
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- **Priority:** P1 (High)
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- **Description:** Multiple flash options for photo capture
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- **Modes:**
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- Off
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- On
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- Auto
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- **Acceptance Criteria:**
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- [ ] Mode selector in camera UI
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- [ ] Flash fires during capture when enabled
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- [ ] Auto mode uses ambient light detection
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#### FR-302: Front Flash
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- **Priority:** P1 (High)
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- **Description:** Screen brightness-based flash for front camera
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- **Acceptance Criteria:**
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- [ ] Screen brightness increases to maximum during front camera capture
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- [ ] Returns to original brightness after capture
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#### FR-303: Flash Sync (Premium)
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- **Priority:** P2 (Medium)
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- **Description:** Match flash color with ring light color
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- **Acceptance Criteria:**
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- [ ] Premium feature with appropriate gating
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- [ ] Screen color matches current ring light color during flash
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- [ ] Toggle in settings to enable/disable
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---
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### FR-400: Self-Timer System
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#### FR-401: Timer Options
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- **Priority:** P1 (High)
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- **Description:** Countdown timer before photo capture
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- **Free Options:**
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- Off
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- 3 seconds
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- **Premium Options:**
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- 5 seconds
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- 10 seconds
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- **Acceptance Criteria:**
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- [ ] Visual countdown indicator
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- [ ] Audio feedback (optional)
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- [ ] Cancel option during countdown
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- [ ] VoiceOver announces countdown
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---
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### FR-500: Display & Enhancement Features
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#### FR-501: Grid Overlay
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- **Priority:** P2 (Medium)
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- **Description:** Rule-of-thirds composition guide
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- **Acceptance Criteria:**
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- [ ] Toggle in settings to show/hide
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- [ ] Semi-transparent grid lines
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- [ ] Does not interfere with tap gestures
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#### FR-502: True Mirror Mode (Premium)
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- **Priority:** P2 (Medium)
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- **Description:** Horizontally flipped preview like a real mirror
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- **Acceptance Criteria:**
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- [ ] Premium feature with appropriate gating
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- [ ] Live preview is mirrored
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- [ ] Captured photo reflects mirror setting
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#### FR-503: Skin Smoothing (Premium)
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- **Priority:** P2 (Medium)
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- **Description:** Real-time subtle skin smoothing filter
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- **Acceptance Criteria:**
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- [ ] Premium feature with appropriate gating
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- [ ] Toggle in settings
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- [ ] Subtle, natural-looking effect
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- [ ] Applied to both preview and captured photo
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#### FR-504: Center Stage (Premium)
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- **Priority:** P3 (Low)
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- **Description:** Automatic subject tracking/centering
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- **Acceptance Criteria:**
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- [ ] Premium feature with appropriate gating
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- [ ] Uses Apple's Center Stage API if available
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- [ ] Graceful fallback on unsupported devices
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---
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### FR-600: Photo Quality Options
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#### FR-601: HDR Mode (Premium)
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- **Priority:** P2 (Medium)
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- **Description:** High Dynamic Range photo capture
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- **Modes:**
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- Off
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- On
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- Auto
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- **Acceptance Criteria:**
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- [ ] Premium feature with appropriate gating
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- [ ] HDR indicator in UI when enabled
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- [ ] Uses system HDR capture capabilities
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#### FR-602: Photo Quality Settings (Premium)
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- **Priority:** P2 (Medium)
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- **Description:** Resolution/quality selection
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- **Options:**
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- Medium (Free)
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- High (Premium)
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- **Acceptance Criteria:**
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- [ ] Premium feature for High quality
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- [ ] Clear indication of current quality setting
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- [ ] Maximum resolution output for High setting
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---
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### FR-700: Settings & Synchronization
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#### FR-701: iCloud Sync
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- **Priority:** P1 (High)
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- **Description:** Automatic settings synchronization across devices
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- **Acceptance Criteria:**
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- [ ] Available to all users (free and premium)
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- [ ] Real-time sync status with last sync timestamp
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- [ ] Manual "Sync Now" option
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- [ ] Uses Bedrock's CloudSyncManager
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#### FR-702: Settings Persistence
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- **Priority:** P0 (Critical)
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- **Description:** All user preferences stored in SyncedSettings model
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- **Settings Include:**
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- Ring light: size, color ID, custom color RGB, opacity, enabled
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- Camera: position, flash mode, HDR mode, photo quality
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- Display: mirror flip, skin smoothing, grid visible
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- Capture: timer, capture mode, auto-save
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- Premium features: flash sync, center stage
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- **Acceptance Criteria:**
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- [ ] Settings persist across app launches
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- [ ] Debounced saves for slider values
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- [ ] Settings sync via iCloud
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---
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### FR-800: Branding & Launch Experience
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#### FR-801: Animated Launch Screen
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- **Priority:** P2 (Medium)
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- **Description:** Beautiful branded launch experience
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- **Acceptance Criteria:**
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- [ ] Animated launch with configurable duration
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- [ ] Customizable colors, patterns, and layout
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- [ ] Seamless transition to main app
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- [ ] Uses Bedrock's LaunchScreenConfig
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#### FR-802: App Icon
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- **Priority:** P2 (Medium)
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- **Description:** Consistent branded app icon
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- **Acceptance Criteria:**
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- [ ] Generated via Bedrock icon system
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- [ ] Matches launch screen branding
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- [ ] Icon generator available in DEBUG builds
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---
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### FR-900: Premium & Monetization
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#### FR-901: Freemium Model
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- **Priority:** P0 (Critical)
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- **Description:** Free tier with optional Pro subscription
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- **Free Features:**
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- Basic ring light (2 colors)
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- Photo capture
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- 3-second timer
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- Grid overlay
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- Zoom
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- iCloud sync
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- **Premium Features:**
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- Full color palette + custom colors
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- HDR mode
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- High quality photos
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- Flash sync
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- True mirror mode
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- Skin smoothing
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- Center stage
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- Extended timers (5s, 10s)
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#### FR-902: RevenueCat Integration
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- **Priority:** P0 (Critical)
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- **Description:** Subscription management via RevenueCat
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- **Acceptance Criteria:**
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- [ ] PremiumManager wraps RevenueCat SDK
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- [ ] PremiumGate utility for consistent feature gating
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- [ ] Entitlement named `pro`
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- [ ] Settings automatically fall back to free defaults when not premium
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#### FR-903: Paywall
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- **Priority:** P1 (High)
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- **Description:** Pro subscription purchase flow
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- **Acceptance Criteria:**
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- [ ] Clear presentation of premium features
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- [ ] Monthly and yearly subscription options
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- [ ] Restore purchases functionality
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- [ ] Accessible and localized
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#### FR-904: Debug Premium Mode
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- **Priority:** P3 (Low)
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- **Description:** Testing premium features without subscription
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- **Acceptance Criteria:**
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- [ ] Environment variable `ENABLE_DEBUG_PREMIUM=1`
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- [ ] Only works in DEBUG builds
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- [ ] Unlocks all premium features for testing
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---
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## Non-Functional Requirements
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### NFR-100: Accessibility
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#### NFR-101: VoiceOver Support
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- **Priority:** P0 (Critical)
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- **Acceptance Criteria:**
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- [ ] All interactive elements have meaningful `.accessibilityLabel()`
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- [ ] Dynamic state uses `.accessibilityValue()`
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- [ ] Actions described with `.accessibilityHint()`
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- [ ] Appropriate traits via `.accessibilityAddTraits()`
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- [ ] Decorative elements hidden with `.accessibilityHidden(true)`
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- [ ] Important events trigger accessibility announcements
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#### NFR-102: Dynamic Type
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- **Priority:** P0 (Critical)
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- **Acceptance Criteria:**
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- [ ] All text supports Dynamic Type
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- [ ] Custom dimensions use `@ScaledMetric`
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- [ ] UI remains usable at largest text sizes
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---
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### NFR-200: Performance
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#### NFR-201: Camera Performance
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- **Priority:** P0 (Critical)
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- **Acceptance Criteria:**
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- [ ] Smooth, real-time camera preview (30+ fps)
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- [ ] Minimal latency on capture
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- [ ] No UI blocking during photo processing
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#### NFR-202: Battery Efficiency
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- **Priority:** P1 (High)
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- **Acceptance Criteria:**
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- [ ] Efficient camera usage
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- [ ] Debounced saves reduce iCloud writes
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- [ ] Screen dimming prevention is intentional (user is actively using camera)
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---
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### NFR-300: Privacy & Security
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#### NFR-301: Data Collection
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- **Priority:** P0 (Critical)
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- **Acceptance Criteria:**
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- [ ] No data collection
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- [ ] No analytics
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- [ ] No tracking
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- [ ] Privacy policy reflects minimal data usage
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#### NFR-302: API Key Security
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- **Priority:** P0 (Critical)
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- **Acceptance Criteria:**
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- [ ] API keys stored in `.xcconfig` files
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- [ ] `Secrets.xcconfig` is gitignored
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- [ ] Template file provided for setup
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---
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### NFR-400: Localization
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#### NFR-401: String Catalogs
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- **Priority:** P1 (High)
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- **Acceptance Criteria:**
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- [ ] Uses `.xcstrings` files for localization
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- [ ] All user-facing strings in String Catalog
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- [ ] Minimum supported languages: English (en), Spanish-Mexico (es-MX), French-Canada (fr-CA)
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---
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## Project Structure
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```
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SelfieCam/
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├── App/ # App entry point with launch screen
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├── Configuration/ # xcconfig files (API keys)
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├── Features/
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│ ├── Camera/ # Main camera UI
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│ │ ├── ContentView.swift # Main screen coordinator
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│ │ ├── Views/ # Camera UI components
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│ │ │ ├── CustomCameraScreen.swift
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│ │ │ ├── RingLightOverlay.swift
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│ │ │ ├── CaptureButton.swift
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│ │ │ ├── ExpandableControlsPanel.swift
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│ │ │ ├── CaptureEventInteraction.swift
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│ │ │ └── ...
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│ │ ├── GridOverlay.swift
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│ │ └── PostCapturePreviewView.swift
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│ ├── Paywall/ # Pro subscription flow
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│ │ └── ProPaywallView.swift
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│ └── Settings/ # Configuration screens
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│ ├── SettingsView.swift
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│ ├── SettingsViewModel.swift
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│ └── ...
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├── Shared/
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│ ├── BrandingConfig.swift # App icon & launch screen config
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│ ├── DesignConstants.swift # Design tokens (uses Bedrock)
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│ ├── Color+Extensions.swift # Ring light color presets
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│ ├── Models/ # Data models
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│ │ ├── CameraFlashMode.swift
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│ │ ├── CameraHDRMode.swift
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│ │ ├── PhotoQuality.swift
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│ │ └── ...
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│ ├── Protocols/ # Shared protocols
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│ │ ├── RingLightConfigurable.swift
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│ │ ├── CaptureControlling.swift
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│ │ ├── CaptureEventHandling.swift
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│ │ └── PremiumManaging.swift
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│ ├── Premium/ # Subscription management
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│ │ └── PremiumManager.swift
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│ ├── Services/ # App services
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│ │ └── PhotoLibraryService.swift
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│ └── Storage/ # Persistence
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│ └── SyncedSettings.swift
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└── Resources/ # Assets, localization
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├── Assets.xcassets/
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│ ├── AppIcon.appiconset/
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│ ├── LaunchBackground.colorset/
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│ └── ...
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└── Localizable.xcstrings
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```
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---
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## Dependencies
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| Dependency | Purpose | Integration |
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|------------|---------|-------------|
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| **Bedrock** | Design system, branding, cloud sync | Local Swift package |
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| **MijickCamera** | Camera capture and preview | SPM dependency |
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| **RevenueCat** | Subscription management | SPM dependency |
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---
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## Premium Feature Gating Pattern
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All premium features use centralized `PremiumGate` utility:
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```swift
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// Getter pattern - returns free default if not premium
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var isMirrorFlipped: Bool {
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get { PremiumGate.get(cloudSync.data.isMirrorFlipped, default: false, isPremium: isPremiumUnlocked) }
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set {
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guard PremiumGate.canSet(isPremium: isPremiumUnlocked) else { return }
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updateSettings { $0.isMirrorFlipped = newValue }
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}
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}
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```
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---
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## Premium Feature Matrix
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| Feature | Free Value | Premium Value |
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|---------|-----------|---------------|
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| Ring light colors | Pure White, Warm Cream | All presets + custom |
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| Timer options | Off, 3s | Off, 3s, 5s, 10s |
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| Photo quality | Medium | Medium, High |
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| HDR mode | Off | Off, On, Auto |
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| True mirror | Off | Configurable |
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| Skin smoothing | Off | Configurable |
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| Flash sync | Off | Configurable |
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| Center stage | Off | Configurable |
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---
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## Known Limitations
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### Camera Control Button Light Press
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**Status:** Not Working - Needs Investigation
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The Camera Control button (iPhone 16+) full press works for photo capture, but the light press (secondary action) does not work.
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**What Works:**
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- Camera Control full press → triggers photo capture
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- Volume up/down → triggers capture
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**What Doesn't Work:**
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- Camera Control light press → no event received
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- Camera Control swipe gestures (zoom) → Apple-exclusive API
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**Possible Causes:**
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1. Light press may be restricted to first-party apps
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2. MijickCamera session may interfere with light press detection
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3. Accessibility settings may need explicit enablement
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**User Workaround:**
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Check Settings > Accessibility > Camera Control:
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- Ensure Camera Control is enabled
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- Ensure Light-Press is turned ON
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- Adjust Light-Press Force if needed
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---
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## Future Enhancements
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Potential areas for expansion:
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- [ ] Real-time filters (beauty, color grading)
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- [ ] Gesture-based capture (smile detection)
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- [ ] Widget for quick camera access
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- [ ] Apple Watch remote trigger
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- [ ] Export presets (aspect ratios, watermarks)
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- [ ] Social sharing integrations
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- [ ] Camera Control button swipe-to-zoom (if Apple makes API public)
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|
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---
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## Required Permissions
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|
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| Permission | Reason |
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|------------|--------|
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| Camera | Photo preview and capture |
|
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| Photo Library | Save captured photos |
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| Microphone | May be requested by camera framework (not actively used) |
|
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| iCloud | Settings synchronization (optional) |
|
|
|
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---
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## Development Setup
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|
|
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### 1. Clone and Configure
|
|
|
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```bash
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git clone https://github.com/yourusername/SelfieCam.git
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cd SelfieCam
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cp SelfieCam/Configuration/Secrets.xcconfig.template SelfieCam/Configuration/Secrets.xcconfig
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```
|
|
|
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### 2. Add API Key
|
|
|
|
Edit `Secrets.xcconfig`:
|
|
```
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|
REVENUECAT_API_KEY = appl_your_actual_api_key_here
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```
|
|
|
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### 3. RevenueCat Setup
|
|
|
|
1. Create RevenueCat account and project
|
|
2. Connect to App Store Connect
|
|
3. Create products and entitlement named `pro`
|
|
4. Copy Public App-Specific API Key to `Secrets.xcconfig`
|
|
|
|
### 4. Test Premium Features
|
|
|
|
Set environment variable in scheme:
|
|
- **Name:** `ENABLE_DEBUG_PREMIUM`
|
|
- **Value:** `1`
|
|
|
|
---
|
|
|
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## Code Quality Standards
|
|
|
|
- **No magic numbers**: All values from Design constants
|
|
- **Full accessibility**: Every interactive element has VoiceOver support
|
|
- **Protocol-first**: Shared behavior defined via protocols
|
|
- **Separation of concerns**: Views are dumb, ViewModels contain logic
|
|
- **Modern APIs**: Swift 6, async/await, @Observable
|
|
- **Documentation**: Code comments, README, PRD
|
|
|
|
---
|
|
|
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*This PRD serves as the primary requirements document for SelfieCam development.*
|