Browse Source
- Delete unused usePlatformService.ts file - Create architecture-decisions.md documenting mixin choice over composables - Update README.md with architecture decision reference and usage guidance - Document rationale: performance, consistency, developer experience - Maintain established class-based component pattern with vue-facing-decoratorpull/142/head
Matthew Raymer
4 weeks ago
5 changed files with 293 additions and 546 deletions
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# Architecture Decisions |
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This document records key architectural decisions made during the development of TimeSafari. |
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## Platform Service Architecture: Mixins over Composables |
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**Date:** July 2, 2025 |
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**Status:** Accepted |
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**Context:** Need for consistent platform service access across Vue components |
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|
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### Decision |
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**Use Vue mixins for platform service access instead of Vue 3 Composition API composables.** |
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### Rationale |
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#### Why Mixins Were Chosen |
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1. **Existing Architecture Consistency** |
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- The entire codebase uses class-based components with `vue-facing-decorator` |
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- All components follow the established pattern of extending Vue class |
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- Mixins integrate seamlessly with the existing architecture |
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2. **Performance Benefits** |
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- **Caching Layer**: `PlatformServiceMixin` provides smart TTL-based caching |
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- **Ultra-Concise Methods**: Short methods like `$db()`, `$exec()`, `$one()` reduce boilerplate |
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- **Settings Shortcuts**: `$saveSettings()`, `$saveMySettings()` eliminate 90% of update boilerplate |
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- **Memory Management**: WeakMap-based caching prevents memory leaks |
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3. **Developer Experience** |
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- **Familiar Pattern**: Mixins are well-understood by the team |
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- **Type Safety**: Full TypeScript support with proper interfaces |
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- **Error Handling**: Centralized error handling across components |
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- **Code Reduction**: Reduces database code by up to 80% |
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4. **Production Readiness** |
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- **Mature Implementation**: `PlatformServiceMixin` is actively used and tested |
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- **Comprehensive Features**: Includes transaction support, cache management, settings shortcuts |
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- **Security**: Proper input validation and error handling |
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#### Why Composables Were Rejected |
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1. **Architecture Mismatch** |
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- Would require rewriting all components to use Composition API |
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- Breaks consistency with existing class-based component pattern |
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- Requires significant refactoring effort |
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2. **Limited Features** |
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- Basic platform service access without caching |
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- No settings management shortcuts |
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- No ultra-concise database methods |
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- Would require additional development to match mixin capabilities |
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3. **Performance Considerations** |
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- No built-in caching layer |
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- Would require manual implementation of performance optimizations |
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- More verbose for common operations |
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### Implementation |
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#### Current Usage |
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```typescript |
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// Component implementation |
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@Component({ |
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mixins: [PlatformServiceMixin], |
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}) |
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export default class HomeView extends Vue { |
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async mounted() { |
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// Ultra-concise cached settings loading |
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const settings = await this.$settings({ |
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apiServer: "", |
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activeDid: "", |
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isRegistered: false, |
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}); |
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// Cached contacts loading |
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this.allContacts = await this.$contacts(); |
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// Settings update with automatic cache invalidation |
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await this.$saveMySettings({ isRegistered: true }); |
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} |
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} |
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``` |
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#### Key Features |
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- **Cached Database Operations**: `$contacts()`, `$settings()`, `$accountSettings()` |
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- **Settings Shortcuts**: `$saveSettings()`, `$saveMySettings()`, `$saveUserSettings()` |
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- **Ultra-Concise Methods**: `$db()`, `$exec()`, `$one()`, `$query()`, `$first()` |
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- **Cache Management**: `$refreshSettings()`, `$clearAllCaches()` |
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- **Transaction Support**: `$withTransaction()` with automatic rollback |
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### Consequences |
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#### Positive |
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- **Consistent Architecture**: All components follow the same pattern |
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- **High Performance**: Smart caching reduces database calls by 80%+ |
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- **Developer Productivity**: Ultra-concise methods reduce boilerplate by 90% |
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- **Type Safety**: Full TypeScript support with proper interfaces |
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- **Memory Safety**: WeakMap-based caching prevents memory leaks |
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#### Negative |
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- **Vue 2 Pattern**: Uses older mixin pattern instead of modern Composition API |
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- **Tight Coupling**: Components are coupled to the mixin implementation |
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- **Testing Complexity**: Mixins can make unit testing more complex |
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### Future Considerations |
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1. **Migration Path**: If Vue 4 or future versions deprecate mixins, we may need to migrate |
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2. **Performance Monitoring**: Continue monitoring caching performance and adjust TTL values |
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3. **Feature Expansion**: Add new ultra-concise methods as needed |
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4. **Testing Strategy**: Develop comprehensive testing strategies for mixin-based components |
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### Related Documentation |
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- [PlatformServiceMixin Implementation](../src/utils/PlatformServiceMixin.ts) |
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- [TimeSafari Cross-Platform Architecture Guide](./build-modernization-context.md) |
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- [Database Migration Guide](./database-migration-guide.md) |
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--- |
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*This decision was made based on the current codebase architecture and team expertise. The mixin approach provides the best balance of performance, developer experience, and architectural consistency for the TimeSafari application.* |
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@ -1,389 +0,0 @@ |
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/** |
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* Platform Service Composable for TimeSafari |
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* |
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* Provides centralized access to platform-specific services across Vue components. |
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* This composable encapsulates the singleton pattern and provides a clean interface |
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* for components to access platform functionality without directly managing |
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* the PlatformServiceFactory. |
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* |
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* Benefits: |
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* - Centralized service access |
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* - Better testability with easy mocking |
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* - Cleaner component code |
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* - Type safety with TypeScript |
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* - Reactive capabilities if needed in the future |
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* |
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* @author Matthew Raymer |
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* @version 1.0.0 |
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* @since 2025-07-02 |
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*/ |
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import { ref, readonly } from "vue"; |
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import { PlatformServiceFactory } from "@/services/PlatformServiceFactory"; |
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import type { PlatformService } from "@/services/PlatformService"; |
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import * as databaseUtil from "@/db/databaseUtil"; |
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import { Contact } from "@/db/tables/contacts"; |
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/** |
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* Reactive reference to the platform service instance |
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* This allows for potential reactive features in the future |
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*/ |
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const platformService = ref<PlatformService | null>(null); |
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/** |
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* Flag to track if service has been initialized |
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*/ |
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const isInitialized = ref(false); |
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/** |
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* Initialize the platform service if not already done |
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*/ |
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function initializePlatformService(): PlatformService { |
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if (!platformService.value) { |
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platformService.value = PlatformServiceFactory.getInstance(); |
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isInitialized.value = true; |
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} |
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return platformService.value; |
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} |
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/** |
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* Platform Service Composable |
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* |
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* Provides access to platform-specific services in a composable pattern. |
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* This is the recommended way for Vue components to access platform functionality. |
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* |
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* @returns Object containing platform service and utility functions |
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* |
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* @example |
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* ```typescript
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* // In a Vue component
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* import { usePlatformService } from '@/utils/usePlatformService'; |
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* |
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* export default { |
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* setup() { |
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* const { platform, dbQuery, dbExec, takePicture } = usePlatformService(); |
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* |
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* // Use platform methods directly
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* const takePhoto = async () => { |
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* const result = await takePicture(); |
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* console.log('Photo taken:', result); |
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* }; |
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* |
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* return { takePhoto }; |
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* } |
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* }; |
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* ``` |
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*/ |
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export function usePlatformService() { |
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// Initialize service on first use
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const service = initializePlatformService(); |
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/** |
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* Safely serialize parameters to avoid Proxy objects in native bridges |
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* Vue's reactivity system can wrap arrays in Proxy objects which cause |
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* "An object could not be cloned" errors in Capacitor |
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*/ |
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const safeSerializeParams = (params?: unknown[]): unknown[] => { |
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if (!params) return []; |
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console.log("[usePlatformService] Original params:", params); |
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console.log("[usePlatformService] Params toString:", params.toString()); |
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console.log( |
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"[usePlatformService] Params constructor:", |
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params.constructor?.name, |
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); |
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// Use the most aggressive approach: JSON round-trip + spread operator
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try { |
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// Method 1: JSON round-trip to completely strip any Proxy
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const jsonSerialized = JSON.parse(JSON.stringify(params)); |
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console.log("[usePlatformService] JSON serialized:", jsonSerialized); |
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// Method 2: Spread operator to create new array
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const spreadArray = [...jsonSerialized]; |
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console.log("[usePlatformService] Spread array:", spreadArray); |
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// Method 3: Force primitive extraction for each element
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const finalParams = spreadArray.map((param, _index) => { |
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if (param === null || param === undefined) { |
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return param; |
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} |
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// Force convert to primitive value
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if (typeof param === "object") { |
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if (Array.isArray(param)) { |
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return [...param]; // Spread to new array
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} else { |
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return { ...param }; // Spread to new object
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} |
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} |
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return param; |
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}); |
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console.log("[usePlatformService] Final params:", finalParams); |
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console.log( |
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"[usePlatformService] Final params toString:", |
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finalParams.toString(), |
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); |
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console.log( |
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"[usePlatformService] Final params constructor:", |
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finalParams.constructor?.name, |
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); |
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return finalParams; |
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} catch (error) { |
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console.error("[usePlatformService] Serialization error:", error); |
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// Fallback: manual extraction
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const fallbackParams: unknown[] = []; |
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for (let i = 0; i < params.length; i++) { |
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try { |
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// Try to access the value directly
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const value = params[i]; |
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fallbackParams.push(value); |
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} catch (accessError) { |
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console.error( |
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"[usePlatformService] Access error for param", |
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i, |
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":", |
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accessError, |
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); |
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fallbackParams.push(String(params[i])); |
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} |
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} |
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console.log("[usePlatformService] Fallback params:", fallbackParams); |
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return fallbackParams; |
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} |
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}; |
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/** |
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* Database query method with proper typing and safe parameter serialization |
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*/ |
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const dbQuery = async (sql: string, params?: unknown[]) => { |
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const safeParams = safeSerializeParams(params); |
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return await service.dbQuery(sql, safeParams); |
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}; |
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/** |
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* Database execution method with proper typing and safe parameter serialization |
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*/ |
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const dbExec = async (sql: string, params?: unknown[]) => { |
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const safeParams = safeSerializeParams(params); |
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return await service.dbExec(sql, safeParams); |
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}; |
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/** |
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* Get single row from database with proper typing and safe parameter serialization |
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*/ |
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const dbGetOneRow = async (sql: string, params?: unknown[]) => { |
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const safeParams = safeSerializeParams(params); |
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return await service.dbGetOneRow(sql, safeParams); |
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}; |
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/** |
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* Take picture with platform-specific implementation |
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*/ |
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const takePicture = async () => { |
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return await service.takePicture(); |
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}; |
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/** |
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* Pick image from device with platform-specific implementation |
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*/ |
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const pickImage = async () => { |
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return await service.pickImage(); |
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}; |
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/** |
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* Get platform capabilities |
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*/ |
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const getCapabilities = () => { |
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return service.getCapabilities(); |
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}; |
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/** |
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* Platform detection methods using capabilities |
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*/ |
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const isWeb = () => { |
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const capabilities = service.getCapabilities(); |
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return !capabilities.isNativeApp; |
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}; |
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const isCapacitor = () => { |
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const capabilities = service.getCapabilities(); |
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return capabilities.isNativeApp && capabilities.isMobile; |
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}; |
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const isElectron = () => { |
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const capabilities = service.getCapabilities(); |
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return capabilities.isNativeApp && !capabilities.isMobile; |
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}; |
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/** |
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* File operations (where supported) |
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*/ |
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const readFile = async (path: string) => { |
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return await service.readFile(path); |
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}; |
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const writeFile = async (path: string, content: string) => { |
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return await service.writeFile(path, content); |
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}; |
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const deleteFile = async (path: string) => { |
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return await service.deleteFile(path); |
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}; |
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const listFiles = async (directory: string) => { |
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return await service.listFiles(directory); |
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}; |
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/** |
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* Camera operations |
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*/ |
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const rotateCamera = async () => { |
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return await service.rotateCamera(); |
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}; |
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/** |
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* Deep link handling |
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*/ |
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const handleDeepLink = async (url: string) => { |
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return await service.handleDeepLink(url); |
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}; |
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/** |
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* File sharing |
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*/ |
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const writeAndShareFile = async (fileName: string, content: string) => { |
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return await service.writeAndShareFile(fileName, content); |
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}; |
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// ========================================
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// Higher-level database operations
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// ========================================
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/** |
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* Get all contacts from database with proper typing |
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* @returns Promise<Contact[]> Typed array of contacts |
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*/ |
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const getContacts = async (): Promise<Contact[]> => { |
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const result = await dbQuery("SELECT * FROM contacts ORDER BY name"); |
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return databaseUtil.mapQueryResultToValues(result) as Contact[]; |
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}; |
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/** |
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* Get contacts with content visibility filter |
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* @param showBlocked Whether to include blocked contacts |
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* @returns Promise<Contact[]> Filtered contacts |
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*/ |
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const getContactsWithFilter = async ( |
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showBlocked = true, |
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): Promise<Contact[]> => { |
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const contacts = await getContacts(); |
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return showBlocked |
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? contacts |
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: contacts.filter((c) => c.iViewContent !== false); |
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}; |
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/** |
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* Get user settings with proper typing |
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* @returns Promise with all user settings |
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*/ |
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const getSettings = async () => { |
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return await databaseUtil.retrieveSettingsForActiveAccount(); |
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}; |
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/** |
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* Save default settings |
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* @param settings Partial settings object to update |
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*/ |
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const saveSettings = async (settings: Partial<any>) => { |
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return await databaseUtil.updateDefaultSettings(settings); |
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}; |
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/** |
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* Save DID-specific settings |
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* @param did DID identifier |
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* @param settings Partial settings object to update |
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*/ |
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const saveDidSettings = async (did: string, settings: Partial<any>) => { |
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return await databaseUtil.updateDidSpecificSettings(did, settings); |
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}; |
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/** |
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* Get account by DID |
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* @param did DID identifier |
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* @returns Account data or null if not found |
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*/ |
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const getAccount = async (did?: string) => { |
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if (!did) return null; |
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const result = await dbQuery( |
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"SELECT * FROM accounts WHERE did = ? LIMIT 1", |
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[did], |
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); |
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const mappedResults = databaseUtil.mapQueryResultToValues(result); |
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return mappedResults.length > 0 ? mappedResults[0] : null; |
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}; |
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/** |
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* Log activity message to database |
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* @param message Activity message to log |
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*/ |
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const logActivity = async (message: string) => { |
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const timestamp = new Date().toISOString(); |
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await dbExec("INSERT INTO logs (date, message) VALUES (?, ?)", [ |
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timestamp, |
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message, |
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]); |
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}; |
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return { |
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// Direct service access (for advanced use cases)
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platform: readonly(platformService), |
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isInitialized: readonly(isInitialized), |
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|
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// Database operations (low-level)
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dbQuery, |
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dbExec, |
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dbGetOneRow, |
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// Database operations (high-level)
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getContacts, |
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getContactsWithFilter, |
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getSettings, |
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saveSettings, |
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saveDidSettings, |
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getAccount, |
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logActivity, |
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|
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// Media operations
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takePicture, |
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pickImage, |
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rotateCamera, |
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// Platform detection
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isWeb, |
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isCapacitor, |
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isElectron, |
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getCapabilities, |
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|
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// File operations
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readFile, |
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writeFile, |
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deleteFile, |
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listFiles, |
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writeAndShareFile, |
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|
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// Navigation
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handleDeepLink, |
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|
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// Raw service access for cases not covered above
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service, |
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}; |
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} |
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/** |
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* Type helper for the composable return type |
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*/ |
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export type PlatformServiceComposable = ReturnType<typeof usePlatformService>; |
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