Visualizing HealthKit State of Mind in visionOS

At a glance

Project structure

Source bundle/
└── HKStateOfMindDataSampleApp/
    └── HKStateOfMindDataSampleApp/
        ├── HKStateOfMindDataSampleApp.swift
        ├── Models/
        │   ├── Insights/
        │   │   └── InsightsModels.swift
        │   ├── Calendars/
        │   │   └── CalendarModel.swift
        │   ├── Stores/
        │   │   └── HealthStore.swift
        │   └── Today/
        │       └── EventModel.swift
        ├── Views/
        │   ├── Charts/
        │   │   └── CalendarChartsView.swift
        │   ├── Authorization/
        │   │   └── AuthorizationGatedView.swift
        │   ├── Reflection/
        │   │   └── ReflectionCurrentEmojiPickerView.swift
        │   ├── TabsView.swift
        │   └── Today/
        │       └── CalendarScoreView.swift
        └── Data Sources/
            ├── CalendarQualityScoreProvider.swift
            └── WorkLifeBalanceScoreProvider.swift

Structure observations

• Architecturally prominent files are ranked from entry points and role-named declarations; resource-only paths are omitted.
• Primary languages: Swift.
• The verified tree contains 5 project/configuration file(s) and 48 source declaration(s).

Overall architecture

flowchart LR
    N1["HKStateOfMindDataSampleApp"]
    N2["TabsView"]
    N3["HealthStore"]
    N4["CalendarQualityScoreProvider"]
    N5["HealthKit APIs"]
    N1 --> N2
    N2 --> N3
    N3 --> N4
    N4 --> N5

Reference code

HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp.swift:12 — architecture anchor

@main
struct HKStateOfMindDataSampleApp: App {
    // ...
}

Interpretation

The arrows summarize the source-visible entry, role-named types or folders, and framework direction; when nodes come from structural folders, the sequence is a high-level interpretation rather than proof that every adjacent node calls the next. Ownership is claimed only where the next section cites a stored property or assignment. The diagram is intentionally limited to the dominant path into HealthKit.

Ownership and state

classDiagram
    HKStateOfMindDataSampleApp *-- Calendars : calendars
    HKStateOfMindDataSampleApp *-- Bool : eventsAuthorized
    HKStateOfMindDataSampleApp *-- Bool : healthDataAuthorized
    InsightModel *-- UUID : id

Ownership evidence

HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp.swift:17 — stored dependency or nearest verified ownership anchor

    @State var calendars = Calendars(calendarModels: [])

    /* Authorization */
    @State var eventsAuthorized: Bool?

    @State var toggleHealthDataAuthorization = false
    @State var healthDataAuthorized: Bool?

Composition arrows indicate a source-visible construction expression or locally owned value state; aggregation means the owner stores or receives a dependency without proving exclusive lifetime ownership.

Class and protocol design

HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp.swift:13 — representative type boundary

struct HKStateOfMindDataSampleApp: App {
    // ...
}

No local protocol conformance is claimed as protocol-oriented design; external framework conformances are listed only as dependencies.

Access control

Reference code

HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/Data Sources/CalendarFetcher.swift:21 — representative boundary

actor CalendarFetcher {
    // ...
    private let eventStore: EKEventStore
    // ...
}

Swift declarations without a modifier are internal; explicit private, fileprivate, private(set), public, or open entries above are interpreted by language semantics. Objective-C/C samples instead rely on header and implementation boundaries, which are not equivalent to Swift lexical privacy.

Logic ownership and placement

Design patterns

Naming conventions

• Types: App: HKStateOfMindDataSampleApp; Model: CalendarModel, EventModel, InsightModel; Provider: CalendarQualityScoreProvider, CalendarStateOfMindDataProvider, WorkLifeBalanceScoreProvider; Scene: ReflectionScene; Store: HealthStore; View: CalendarChartsView, CalendarScoreView, CalendarSelectorView, ChartView, DateIntervalPaginationView.
• Protocols: no local protocol declaration in the scanned source.
• Methods: decrement, increment.
• Files: HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp.swift, HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/Views/Charts/CalendarChartsView.swift, HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/Models/Calendars/CalendarModel.swift, HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/Models/Stores/HealthStore.swift, HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/Models/Today/EventModel.swift, HKStateOfMindDataSampleApp/HKStateOfMindDataSampleApp/Views/Reflection/ReflectionCurrentEmojiPickerView.swift.

Architecture takeaways

• HKStateOfMindDataSampleApp is the main source-visible entry or composition anchor for this sample.
• Framework work reaches SwiftUI, HealthKit, EventKit, Charts through a deliberately small high-level chain; the detailed API graph remains inside the cited implementation files.
• Stored-property evidence identifies lifecycle collaboration; it does not by itself prove exclusive object ownership.
• Access-control conclusions separate verified language visibility from the likely design rationale.
• The source does not justify labeling the design protocol-oriented.

Source map

• Official Apple documentation