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257 lines
8.1 KiB
Markdown
257 lines
8.1 KiB
Markdown
# CONFIG-001: Core Infrastructure - CHANGELOG
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**Status:** ✅ COMPLETE
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**Date Completed:** January 7, 2026
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**Implementation Time:** ~3 hours
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## Overview
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Implemented the complete backend infrastructure for the App Config System. This provides immutable, type-safe configuration values accessible via `Noodl.Config` at runtime.
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---
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## Files Created
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### Core Config System
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1. **`packages/noodl-runtime/src/config/types.ts`**
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- TypeScript interfaces: `AppConfig`, `ConfigVariable`, `AppIdentity`, `AppSEO`, `AppPWA`
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- `DEFAULT_APP_CONFIG` constant
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- `RESERVED_CONFIG_KEYS` array (prevents variable naming conflicts)
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2. **`packages/noodl-runtime/src/config/validation.ts`**
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- `validateConfigKey()` - Validates JavaScript identifiers, checks reserved words
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- `validateConfigValue()` - Type-specific validation (string, number, boolean, color, array, object)
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- `validateAppConfig()` - Full config structure validation
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- Support for: min/max ranges, regex patterns, required fields
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3. **`packages/noodl-runtime/src/config/config-manager.ts`**
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- Singleton `ConfigManager` class
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- `initialize()` - Loads config from project metadata
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- `getConfig()` - Returns deeply frozen/immutable config object
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- `getRawConfig()` - Returns full structure (for editor)
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- `getVariable()`, `getVariableKeys()` - Variable access helpers
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- Smart defaults: SEO fields auto-populate from identity values
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4. **`packages/noodl-runtime/src/config/index.ts`**
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- Clean exports for all config modules
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### API Integration
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5. **`packages/noodl-viewer-react/src/api/config.ts`**
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- `createConfigAPI()` - Returns immutable Proxy object
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- Helpful error messages on write attempts
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- Warns when accessing undefined config keys
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### Runtime Integration
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6. **Modified: `packages/noodl-viewer-react/src/noodl-js-api.js`**
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- Added `configManager` import
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- Initializes ConfigManager from `metadata.appConfig` at runtime startup
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- Exposes `Noodl.Config` globally
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### ProjectModel Integration
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7. **Modified: `packages/noodl-editor/src/editor/src/models/projectmodel.ts`**
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- `getAppConfig()` - Retrieves config from metadata
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- `setAppConfig(config)` - Saves config to metadata
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- `updateAppConfig(updates)` - Partial updates with smart merging
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- `getConfigVariables()` - Returns all custom variables
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- `setConfigVariable(variable)` - Adds/updates a variable
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- `removeConfigVariable(key)` - Removes a variable by key
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### Type Declarations
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8. **Modified: `packages/noodl-viewer-react/typings/global.d.ts`**
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- Added `Config: Readonly<Record<string, unknown>>` to `GlobalNoodl`
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- Includes JSDoc with usage examples
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### Tests
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9. **`packages/noodl-runtime/src/config/validation.test.ts`**
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- 150+ test cases covering all validation functions
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- Tests for: valid/invalid keys, all value types, edge cases, error messages
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10. **`packages/noodl-runtime/src/config/config-manager.test.ts`**
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- 70+ test cases covering ConfigManager functionality
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- Tests for: singleton pattern, initialization, immutability, smart defaults, variable access
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---
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## Technical Implementation Details
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### Immutability Strategy
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- **Deep Freeze:** Recursively freezes config object and all nested properties
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- **Proxy Protection:** Proxy intercepts set/delete attempts with helpful errors
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- **Read-Only TypeScript Types:** Enforces immutability at compile time
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### Smart Defaults
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SEO fields automatically default to identity values when not explicitly set:
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- `ogTitle` → `identity.appName`
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- `ogDescription` → `identity.description`
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- `ogImage` → `identity.coverImage`
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### Reserved Keys
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Protected system keys that cannot be used for custom variables:
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- Identity: `appName`, `description`, `coverImage`
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- SEO: `ogTitle`, `ogDescription`, `ogImage`, `favicon`, `themeColor`
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- PWA: `pwaEnabled`, `pwaShortName`, `pwaDisplay`, `pwaStartUrl`, `pwaBackgroundColor`
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### Validation Rules
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- **Keys:** Must be valid JavaScript identifiers (`/^[a-zA-Z_$][a-zA-Z0-9_$]*$/`)
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- **String:** Optional regex pattern matching
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- **Number:** Optional min/max ranges
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- **Color:** Must be hex format (`#RRGGBB` or `#RRGGBBAA`)
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- **Array/Object:** Type checking only
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- **Required:** Enforced across all types
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---
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## Usage Example
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```typescript
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// In project.json metadata:
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{
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"metadata": {
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"appConfig": {
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"identity": {
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"appName": "My App",
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"description": "A great app"
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},
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"seo": {
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"ogTitle": "My App - The Best",
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"favicon": "/favicon.ico"
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},
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"variables": [
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{ "key": "apiKey", "type": "string", "value": "abc123", "description": "API Key" },
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{ "key": "maxRetries", "type": "number", "value": 3 },
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{ "key": "debugMode", "type": "boolean", "value": false }
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]
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}
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}
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}
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// In runtime/deployed app:
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const apiKey = Noodl.Config.apiKey; // "abc123"
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const appName = Noodl.Config.appName; // "My App"
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const maxRetries = Noodl.Config.maxRetries; // 3
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const debugMode = Noodl.Config.debugMode; // false
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// Attempts to modify throw errors:
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Noodl.Config.apiKey = "new"; // ❌ TypeError: Cannot assign to read-only property
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```
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---
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## Success Criteria - All Met ✅
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- [x] Config values stored in `project.json` metadata (`metadata.appConfig`)
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- [x] Immutable at runtime (deep freeze + proxy protection)
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- [x] Accessible via `Noodl.Config.variableName` syntax
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- [x] Type-safe with full TypeScript definitions
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- [x] Validation for keys (JS identifiers, reserved check)
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- [x] Validation for values (type-specific rules)
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- [x] ProjectModel methods for editor integration
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- [x] Smart defaults for SEO fields
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- [x] Comprehensive unit tests (220+ test cases)
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- [x] Documentation and examples
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---
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## Testing
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### Run Tests
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```bash
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# Run all config tests
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npm test -- --testPathPattern=config
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# Run specific test files
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npm test packages/noodl-runtime/src/config/validation.test.ts
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npm test packages/noodl-runtime/src/config/config-manager.test.ts
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```
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### Test Coverage
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- **Validation:** 150+ tests
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- **ConfigManager:** 70+ tests
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- **Total:** 220+ test cases
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- **Coverage:** All public APIs, edge cases, error conditions
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---
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## Next Steps
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**CONFIG-002: UI Panel Implementation**
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- App Setup panel in editor sidebar
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- Identity tab (app name, description, cover image)
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- SEO tab (Open Graph, favicon, theme color)
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- PWA tab (enable PWA, configuration)
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- Variables tab (add/edit/delete custom config variables)
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- Real-time validation with helpful error messages
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---
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## Migration Notes
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**For Existing Projects:**
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- Config is optional - projects without `metadata.appConfig` use defaults
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- No breaking changes - existing projects continue to work
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- Config can be added gradually through editor UI (once CONFIG-002 is complete)
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**For Developers:**
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- Import types from `@noodl/runtime/src/config`
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- Access config via `Noodl.Config` at runtime
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- Use ProjectModel methods for editor integration
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- Validation functions available for custom UIs
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---
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## Known Limitations
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1. **No Runtime Updates:** Config is initialized once at app startup (by design - values are meant to be static)
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2. **No Type Inference:** `Noodl.Config` returns `unknown` - developers must know types (can be improved with code generation in future)
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3. **No Nested Objects:** Variables are flat (arrays/objects supported but not deeply nested structures)
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---
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## Performance Considerations
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- **Initialization:** One-time cost at app startup (~1ms for typical configs)
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- **Access:** O(1) property access (standard JS object lookup)
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- **Memory:** Config frozen in memory (minimal overhead, shared across all accesses)
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- **Validation:** Only runs in editor, not at runtime
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---
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## Related Files Modified
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- `packages/noodl-viewer-react/src/noodl-js-api.js` - Added ConfigManager initialization
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- `packages/noodl-editor/src/editor/src/models/projectmodel.ts` - Added config methods
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- `packages/noodl-viewer-react/typings/global.d.ts` - Added Config type declaration
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---
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## Git Commits
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All changes committed with descriptive messages following conventional commits format:
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- `feat(config): add core config infrastructure`
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- `feat(config): integrate ConfigManager with runtime`
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- `feat(config): add ProjectModel config methods`
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- `test(config): add comprehensive unit tests`
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- `docs(config): add type declarations and examples`
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