Closes: BS-3186
# @blocksuite/affine-ext-loader
Blocksuite extension loader system for AFFiNE, providing a structured way to manage and load extensions in different contexts.
## Usage
### Basic Extension Provider
```typescript
import { BaseExtensionProvider } from '@blocksuite/affine-ext-loader';
import { z } from 'zod';
// Create a custom provider with options
class MyProvider extends BaseExtensionProvider<'my-scope', { enabled: boolean }> {
name = 'MyProvider';
schema = z.object({
enabled: z.boolean(),
});
setup(context: Context<'my-scope'>, options?: { enabled: boolean }) {
super.setup(context, options);
// Custom setup logic
}
}
```
### Store Extensions
```typescript
import { StoreExtensionProvider, StoreExtensionManager } from '@blocksuite/affine-ext-loader';
import { z } from 'zod';
// Create a store provider with custom options
class MyStoreProvider extends StoreExtensionProvider<{ cacheSize: number }> {
override name = 'MyStoreProvider';
override schema = z.object({
cacheSize: z.number().min(0),
});
override setup(context: StoreExtensionContext, options?: { cacheSize: number }) {
super.setup(context, options);
context.register([Ext1, Ext2, Ext3]);
}
}
// Create and use the store extension manager
const manager = new StoreExtensionManager([MyStoreProvider]);
manager.configure(MyStoreProvider, { cacheSize: 100 });
const extensions = manager.get('store');
```
### View Extensions
```typescript
import { ViewExtensionProvider, ViewExtensionManager } from '@blocksuite/affine-ext-loader';
import { z } from 'zod';
// Create a view provider with custom options
class MyViewProvider extends ViewExtensionProvider<{ theme: string }> {
override name = 'MyViewProvider';
override schema = z.object({
theme: z.enum(['light', 'dark']),
});
override setup(context: ViewExtensionContext, options?: { theme: string }) {
super.setup(context, options);
context.register([CommonExt]);
if (context.scope === 'page') {
context.register([PageExt]);
} else if (context.scope === 'edgeless') {
context.register([EdgelessExt]);
}
if (options?.theme === 'dark') {
context.register([DarkModeExt]);
}
}
// Override effect to run one-time initialization logic
override effect() {
// This will only run once per provider class
console.log('Initializing MyViewProvider');
// Register lit elements
this.registerLitElements();
}
}
// Create and use the view extension manager
const manager = new ViewExtensionManager([MyViewProvider]);
manager.configure(MyViewProvider, { theme: 'dark' });
// Get extensions for different view scopes
const pageExtensions = manager.get('page');
const edgelessExtensions = manager.get('edgeless');
```
### One-time Initialization with Effect
View extensions support one-time initialization through the `effect` method. This method is called automatically during setup, but only once per provider class. It's useful for:
- Initializing global state
- Registering lit elements
- Setting up shared resources
```typescript
class MyViewProvider extends ViewExtensionProvider {
override effect() {
// This will only run once, even if multiple instances are created
initializeGlobalState();
registerLitElements();
setupGlobalEventListeners();
}
}
```
### Available View Scopes
The view extension system supports the following scopes:
- `page` - Standard page view
- `edgeless` - Edgeless (whiteboard) view
- `preview-page` - Page preview view
- `preview-edgeless` - Edgeless preview view
- `mobile-page` - Mobile page view
- `mobile-edgeless` - Mobile edgeless view
### Extension Configuration
Extensions can be configured using the `configure` method:
```typescript
// Set configuration directly
manager.configure(MyProvider, { enabled: true });
// Update configuration using a function
manager.configure(MyProvider, prev => {
if (!prev) return prev;
return {
...prev,
enabled: !prev.enabled,
};
});
// Remove configuration
manager.configure(MyProvider, undefined);
```
### Dependency Injection
Both store and view extension managers support dependency injection:
```typescript
// Access the manager through the di container
const viewManager = std.get(ViewExtensionManagerIdentifier);
const pagePreviewExtension = viewManager.get('preview-page');
```
