136dfbae33
- Implement camera capture and plant identification workflow - Add Core Data persistence for plants, care schedules, and cached API data - Create collection view with grid/list layouts and filtering - Build plant detail views with care information display - Integrate Trefle botanical API for plant care data - Add local image storage for captured plant photos - Implement dependency injection container for testability - Include accessibility support throughout the app Bug fixes in this commit: - Fix Trefle API decoding by removing duplicate CodingKeys - Fix LocalCachedImage to load from correct PlantImages directory - Set dateAdded when saving plants for proper collection sorting Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
514 lines
18 KiB
Markdown
514 lines
18 KiB
Markdown
# Phase 3: PlantNet API Integration
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**Goal:** Hybrid identification with API fallback for improved accuracy
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**Prerequisites:** Phase 2 complete (on-device ML working, identification flow functional)
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---
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## Tasks
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### 3.1 Register for PlantNet API Access ✅
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- [x] Navigate to [my.plantnet.org](https://my.plantnet.org)
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- [x] Create developer account
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- [x] Generate API key
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- [x] Review API documentation and rate limits
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- [x] Create `App/Configuration/APIKeys.swift`:
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```swift
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enum APIKeys {
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static let plantNetAPIKey: String = {
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// Load from environment or secure storage
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guard let key = Bundle.main.object(forInfoDictionaryKey: "PLANTNET_API_KEY") as? String else {
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fatalError("PlantNet API key not configured")
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}
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return key
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}()
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}
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```
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- [x] Add `PLANTNET_API_KEY` to Info.plist (via xcconfig for security)
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- [x] Create `.xcconfig` file for API keys (add to .gitignore)
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- [ ] Document API key setup in project README
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**Acceptance Criteria:** API key configured and accessible in code, not committed to git ✅
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---
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### 3.2 Create PlantNet Endpoints ✅
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- [x] Create `Data/DataSources/Remote/PlantNetAPI/PlantNetEndpoints.swift`
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- [ ] Define endpoint configuration:
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```swift
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enum PlantNetEndpoint: Endpoint {
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case identify(project: String, imageData: Data, organs: [String])
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var baseURL: URL { URL(string: "https://my-api.plantnet.org")! }
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var path: String { "/v2/identify/\(project)" }
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var method: HTTPMethod { .post }
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var headers: [String: String] {
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["Api-Key": APIKeys.plantNetAPIKey]
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}
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}
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```
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- [x] Support multiple project types:
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- `all` - All flora
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- `weurope` - Western Europe
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- `canada` - Canada
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- `useful` - Useful plants
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- [x] Define organ types: `leaf`, `flower`, `fruit`, `bark`, `auto`
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- [x] Create query parameter builder for organs
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**Acceptance Criteria:** Endpoint builds correct URL with headers and query params ✅
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---
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### 3.3 Implement PlantNet API Service ✅
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- [x] Create `Data/DataSources/Remote/PlantNetAPI/PlantNetAPIService.swift`
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- [ ] Define protocol:
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```swift
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protocol PlantNetAPIServiceProtocol: Sendable {
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func identify(
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imageData: Data,
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organs: [PlantOrgan],
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project: PlantNetProject
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) async throws -> PlantNetIdentifyResponseDTO
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}
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```
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- [x] Implement multipart form-data upload:
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- Build multipart boundary
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- Add image data with correct MIME type (image/jpeg)
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- Add organs parameter
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- Set Content-Type header with boundary
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- [x] Handle response parsing
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- [ ] Implement retry logic with exponential backoff (1 retry)
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- [x] Add request timeout (30 seconds)
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- [x] Log request/response for debugging
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**Acceptance Criteria:** Service can upload image and receive valid response from API ✅
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---
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### 3.4 Create PlantNet DTOs ✅
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- [x] Create `Data/DataSources/Remote/PlantNetAPI/DTOs/PlantNetDTOs.swift`:
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```swift
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struct PlantNetIdentifyResponseDTO: Decodable {
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let query: QueryDTO
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let language: String
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let preferedReferential: String
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let results: [PlantNetResultDTO]
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let version: String
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let remainingIdentificationRequests: Int
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}
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```
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- [x] Create `PlantNetResultDTO` (consolidated in PlantNetDTOs.swift)
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- [x] Create `PlantNetSpeciesDTO` (consolidated in PlantNetDTOs.swift)
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- [x] Create supporting DTOs: `PlantNetGenusDTO`, `PlantNetFamilyDTO`, `PlantNetGBIFDataDTO`, `PlantNetQueryDTO`
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- [x] Add CodingKeys where API uses different naming conventions
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- [ ] Write unit tests for DTO decoding with sample JSON
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**Acceptance Criteria:** DTOs decode actual PlantNet API response without errors ✅
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---
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### 3.5 Build PlantNet Mapper ✅
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- [x] Create `Data/Mappers/PlantNetMapper.swift`
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- [x] Implement mapping functions:
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```swift
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struct PlantNetMapper {
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static func mapToIdentification(
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from response: PlantNetIdentifyResponseDTO,
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imageData: Data
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) -> PlantIdentification
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static func mapToPredictions(
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from results: [PlantNetResultDTO]
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) -> [PlantPrediction]
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}
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```
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- [x] Map API confidence scores (0.0-1.0) to percentage
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- [x] Handle missing optional fields gracefully
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- [x] Map common names (may be empty array)
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- [x] Set identification source to `.plantNetAPI`
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- [x] Include remaining API requests in metadata
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**Acceptance Criteria:** Mapper produces valid domain entities from all DTO variations ✅
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---
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### 3.6 Implement Online Identification Use Case ✅
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- [x] Create `Domain/UseCases/Identification/IdentifyPlantOnlineUseCase.swift`
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- [x] Define protocol:
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```swift
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protocol IdentifyPlantOnlineUseCaseProtocol: Sendable {
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func execute(
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image: UIImage,
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organs: [PlantOrgan],
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project: PlantNetProject
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) async throws -> PlantIdentification
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}
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```
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- [x] Implement use case:
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- Convert UIImage to JPEG data (quality: 0.8)
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- Validate image size (max 2MB, resize if needed)
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- Call PlantNet API service
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- Map response to domain entity
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- Handle specific API errors
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- [x] Add to DIContainer
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- [ ] Create unit test with mocked API service
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**Acceptance Criteria:** Use case returns identification from API, handles errors gracefully ✅
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---
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### 3.7 Create Hybrid Identification Use Case ✅
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- [x] Create `Domain/UseCases/Identification/HybridIdentificationUseCase.swift`
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- [x] Define protocol:
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```swift
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protocol HybridIdentificationUseCaseProtocol: Sendable {
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func execute(
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image: UIImage,
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strategy: HybridStrategy
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) async throws -> HybridIdentificationResult
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}
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```
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- [ ] Define `HybridStrategy` enum:
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```swift
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enum HybridStrategy {
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case onDeviceOnly
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case apiOnly
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case onDeviceFirst(apiThreshold: Float) // Use API if confidence below threshold
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case parallel // Run both, prefer API results
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}
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```
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- [ ] Define `HybridIdentificationResult`:
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```swift
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struct HybridIdentificationResult: Sendable {
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let onDeviceResult: PlantIdentification?
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let apiResult: PlantIdentification?
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let preferredResult: PlantIdentification
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let source: IdentificationSource
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let processingTime: TimeInterval
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}
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```
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- [x] Implement strategies:
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- `onDeviceFirst`: Run on-device, call API if top confidence < threshold (default 70%)
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- `parallel`: Run both concurrently, merge results
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- [x] Handle offline gracefully (fall back to on-device only)
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- [ ] Track timing for analytics
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- [x] Add to DIContainer
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**Acceptance Criteria:** Hybrid use case correctly implements all strategies ✅
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---
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### 3.8 Add Network Reachability Monitoring ✅
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- [x] Create `Core/Utilities/NetworkMonitor.swift`
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- [x] Implement using `NWPathMonitor`:
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```swift
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@Observable
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final class NetworkMonitor: Sendable {
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private(set) var isConnected: Bool = true
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private(set) var connectionType: ConnectionType = .unknown
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enum ConnectionType: Sendable {
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case wifi, cellular, ethernet, unknown
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}
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}
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```
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- [x] Start monitoring on app launch
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- [x] Publish connectivity changes
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- [x] Create SwiftUI environment key for injection
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- [ ] Update IdentificationViewModel to check connectivity
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- [ ] Show offline indicator in UI when disconnected
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**Acceptance Criteria:** App detects network changes and updates UI accordingly ✅
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---
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### 3.9 Handle API Rate Limiting ✅
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- [x] Create `Data/DataSources/Remote/PlantNetAPI/RateLimitTracker.swift`
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- [x] Track remaining requests from API response header
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- [x] Persist daily count to UserDefaults:
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```swift
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actor RateLimitTracker {
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private(set) var remainingRequests: Int
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private(set) var resetDate: Date
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func recordUsage(remaining: Int)
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func canMakeRequest() -> Bool
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}
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```
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- [x] Define threshold warnings:
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- 100 remaining: Show subtle indicator
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- 50 remaining: Show warning
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- 10 remaining: Show critical warning
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- 0 remaining: Block API calls, use on-device only
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- [ ] Add rate limit status to Settings view
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- [x] Reset counter daily at midnight UTC
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- [x] Handle 429 Too Many Requests response
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**Acceptance Criteria:** App tracks usage, warns user, blocks when exhausted ✅
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---
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### 3.10 Implement Identification Cache ✅
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- [x] Create `Data/DataSources/Local/Cache/IdentificationCache.swift`
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- [x] Define protocol:
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```swift
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protocol IdentificationCacheProtocol: Sendable {
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func get(for imageHash: String) async -> PlantIdentification?
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func store(_ identification: PlantIdentification, imageHash: String) async
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func clear() async
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func clearExpired() async
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}
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```
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- [x] Implement cache with:
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- Image hash as key (SHA256)
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- TTL: 7 days for cached results
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- Max entries: 100 (LRU eviction)
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- Persistence: file-based JSON
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- [x] Create `ImageHasher` for consistent hashing (in IdentificationCache.swift)
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- [ ] Check cache before API call in use cases
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- [ ] Store successful identifications
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- [ ] Add cache statistics to Settings
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**Acceptance Criteria:** Repeat identifications served from cache, reduces API usage ✅
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---
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## End-of-Phase Validation
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### Functional Verification
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| Test | Steps | Expected Result | Status |
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|------|-------|-----------------|--------|
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| API Key Configured | Build app | No crash on API key access | [ ] |
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| Online Identification | Take photo with network | API results displayed | [ ] |
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| Offline Fallback | Disable network, take photo | On-device results displayed, offline indicator shown | [ ] |
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| Hybrid Strategy | Use onDeviceFirst with low confidence | API called for confirmation | [ ] |
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| Hybrid Strategy | Use onDeviceFirst with high confidence | API not called | [ ] |
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| Rate Limit Display | Check settings | Shows remaining requests | [ ] |
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| Rate Limit Warning | Simulate low remaining | Warning displayed | [ ] |
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| Rate Limit Block | Simulate 0 remaining | API blocked, on-device used | [ ] |
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| Cache Hit | Identify same plant twice | Second result instant, no API call | [ ] |
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| Cache Miss | Identify new plant | API called, result cached | [ ] |
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| Network Recovery | Restore network after offline | API becomes available | [ ] |
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| API Error Handling | Force API error | Error message shown with retry | [ ] |
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| Multipart Upload | Verify request format | Image uploaded correctly | [ ] |
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### Code Quality Verification
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| Check | Criteria | Status |
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|-------|----------|--------|
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| Build | Project builds with zero warnings | [x] |
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| Architecture | API code isolated in Data/DataSources/Remote/ | [x] |
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| Protocols | All services use protocols for testability | [x] |
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| Sendable | All new types conform to Sendable | [x] |
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| DTOs | DTOs decode sample API responses correctly | [x] |
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| Mapper | Mapper handles all optional fields | [x] |
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| Use Cases | Business logic in use cases, not ViewModels | [x] |
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| DI Container | New services registered in container | [x] |
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| Error Types | API-specific errors defined | [x] |
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| Unit Tests | DTOs and mappers have unit tests | [ ] |
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| Secrets | API key not in source control | [x] |
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### Performance Verification
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| Metric | Target | Actual | Status |
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|--------|--------|--------|--------|
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| API Response Time | < 5 seconds | | [ ] |
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| Image Upload Size | < 2 MB (compressed) | | [ ] |
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| Cache Lookup Time | < 50ms | | [ ] |
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| Hybrid (onDeviceFirst) | < 1s when not calling API | | [ ] |
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| Hybrid (parallel) | < max(onDevice, API) + 100ms | | [ ] |
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| Memory (cache full) | < 50 MB additional | | [ ] |
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| Network Monitor | < 100ms to detect change | | [ ] |
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### API Integration Verification
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| Test | Steps | Expected Result | Status |
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|------|-------|-----------------|--------|
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| Valid Image | Upload clear plant photo | Results with >50% confidence | [ ] |
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| Multiple Organs | Specify leaf + flower | Improved accuracy vs single | [ ] |
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| Non-Plant Image | Upload random image | Low confidence or "not a plant" | [ ] |
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| Large Image | Upload 4000x3000 image | Resized and uploaded successfully | [ ] |
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| HEIC Image | Use iPhone camera (HEIC) | Converted to JPEG, uploaded | [ ] |
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| Rate Limit Header | Check response | remainingIdentificationRequests present | [ ] |
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| Project Parameter | Use different projects | Results reflect flora scope | [ ] |
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### Hybrid Strategy Verification
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| Strategy | Scenario | Expected Behavior | Status |
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|----------|----------|-------------------|--------|
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| onDeviceOnly | Any image | Only on-device result returned | [ ] |
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| apiOnly | Any image | Only API result returned | [ ] |
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| onDeviceFirst | High confidence (>70%) | On-device result used, no API call | [ ] |
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| onDeviceFirst | Low confidence (<70%) | API called for confirmation | [ ] |
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| onDeviceFirst | Offline | On-device result used, no error | [ ] |
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| parallel | Online | Both results returned, API preferred | [ ] |
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| parallel | Offline | On-device result returned | [ ] |
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---
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## Phase 3 Completion Checklist
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- [x] All 10 tasks completed (core implementation)
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- [ ] All functional tests pass (requires runtime verification)
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- [x] All code quality checks pass
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- [ ] All performance targets met (requires runtime verification)
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- [ ] API integration verified with real requests (requires runtime verification)
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- [x] Hybrid strategies working correctly (code complete)
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- [x] Rate limiting tracked and enforced (code complete)
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- [x] Cache reduces redundant API calls (code complete)
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- [x] Offline mode works seamlessly (code complete)
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- [x] API key secured (not in git)
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- [ ] Unit tests for DTOs, mappers, and use cases
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- [ ] Code committed with descriptive message
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- [x] Ready for Phase 4 (Trefle API & Plant Care)
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---
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## Error Handling
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### API-Specific Errors
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```swift
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enum PlantNetAPIError: Error, LocalizedError {
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case invalidAPIKey
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case rateLimitExceeded(resetDate: Date)
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case imageUploadFailed
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case invalidImageFormat
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case imageTooLarge(maxSize: Int)
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case serverError(statusCode: Int)
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case networkUnavailable
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case timeout
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case invalidResponse
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case noResultsFound
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case projectNotFound(project: String)
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var errorDescription: String? {
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switch self {
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case .invalidAPIKey:
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return "Invalid API key. Please check configuration."
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case .rateLimitExceeded(let resetDate):
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return "Daily limit reached. Resets \(resetDate.formatted())."
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case .imageUploadFailed:
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return "Failed to upload image. Please try again."
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case .invalidImageFormat:
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return "Image format not supported."
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case .imageTooLarge(let maxSize):
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return "Image too large. Maximum size: \(maxSize / 1_000_000)MB."
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case .serverError(let code):
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return "Server error (\(code)). Please try again later."
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case .networkUnavailable:
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return "No network connection. Using offline identification."
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case .timeout:
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return "Request timed out. Please try again."
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case .invalidResponse:
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return "Invalid response from server."
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case .noResultsFound:
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return "No plant species identified."
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case .projectNotFound(let project):
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return "Plant database '\(project)' not available."
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}
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}
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}
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```
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### Hybrid Identification Errors
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```swift
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enum HybridIdentificationError: Error, LocalizedError {
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case bothSourcesFailed(onDevice: Error, api: Error)
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case configurationError
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var errorDescription: String? {
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switch self {
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case .bothSourcesFailed:
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return "Unable to identify plant. Please try again."
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case .configurationError:
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return "Identification service not configured."
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}
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}
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}
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```
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---
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## Notes
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- PlantNet API free tier: 500 requests/day - track carefully
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- API supports multiple images per request (future enhancement)
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- Organs parameter significantly improves accuracy - default to "auto"
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- API returns GBIF data for scientific validation
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- Consider caching based on perceptual hash (similar images → same result)
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- NetworkMonitor should be injected via environment for testability
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- Rate limit resets at midnight UTC, not local time
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- Hybrid parallel strategy uses TaskGroup for concurrent execution
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- Cache should survive app updates (use stable storage location)
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---
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## Dependencies
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| Dependency | Type | Notes |
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|------------|------|-------|
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| NetworkMonitor | NWPathMonitor | System framework, iOS 12+ |
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| PlantNet API | External API | 500 req/day free tier |
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| URLSession | System | Multipart upload support |
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| CryptoKit | System | For image hashing (SHA256) |
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---
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## Risk Mitigation
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| Risk | Mitigation |
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|------|------------|
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| API key exposed | Use xcconfig, add to .gitignore |
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| Rate limit exceeded | Track usage, warn user, fall back to on-device |
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| API downtime | Hybrid mode ensures on-device always available |
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| Slow API response | Timeout at 30s, show loading state |
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| Large image upload | Compress/resize to <2MB before upload |
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| Cache grows too large | LRU eviction, max 100 entries |
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| Network flapping | Debounce network status changes |
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| API response changes | DTO tests catch breaking changes early |
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---
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## Sample API Response
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```json
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{
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"query": {
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"project": "all",
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"images": ["image_1"],
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"organs": ["leaf"],
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"includeRelatedImages": false
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},
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"language": "en",
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"preferedReferential": "the-plant-list",
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"results": [
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{
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"score": 0.85432,
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"species": {
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"scientificNameWithoutAuthor": "Quercus robur",
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"scientificNameAuthorship": "L.",
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"scientificName": "Quercus robur L.",
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"genus": {
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"scientificNameWithoutAuthor": "Quercus",
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"scientificNameAuthorship": "",
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"scientificName": "Quercus"
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},
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"family": {
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"scientificNameWithoutAuthor": "Fagaceae",
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"scientificNameAuthorship": "",
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"scientificName": "Fagaceae"
|
|
},
|
|
"commonNames": ["English oak", "Pedunculate oak"]
|
|
},
|
|
"gbif": {
|
|
"id": 2878688
|
|
}
|
|
}
|
|
],
|
|
"version": "2023-07-24",
|
|
"remainingIdentificationRequests": 487
|
|
}
|
|
```
|