feat(editor): implement embedded template system (TASK-009)

- Add ProjectTemplate TypeScript interfaces for type-safe templates
- Implement EmbeddedTemplateProvider for bundled templates
- Create Hello World template (Router + Home page + Text)
- Update LocalProjectsModel to use embedded templates by default
- Remove programmatic project creation workaround
- Fix: Add required fields (id, comments, metadata) per TASK-010
- Fix: Correct node type 'PageRouter' → 'Router'
- Add comprehensive developer documentation

Benefits:
- No more path resolution issues (__dirname/process.cwd())
- Works identically in dev and production
- Type-safe template definitions
- Easy to add new templates

Closes TASK-009 (Phase 3 - Editor UX Overhaul)
This commit is contained in:
Tara West
2026-01-09 12:25:16 +01:00
parent a104a3a8d0
commit 6aa45320e9
7 changed files with 685 additions and 51 deletions

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@@ -1,9 +1,9 @@
# TASK-009: Template System Refactoring
**Status**: 📋 Planned
**Status**: 🟢 Complete (Backend)
**Priority**: Medium
**Complexity**: Medium
**Estimated Effort**: 2-3 days
**Actual Effort**: 1 day (Backend implementation)
## Context
@@ -244,12 +244,100 @@ class TemplateManager {
- Failed attempt: `packages/noodl-editor/src/editor/src/utils/forge/template/providers/local-template-provider.ts`
- Template registry: `packages/noodl-editor/src/editor/src/utils/forge/index.ts`
## Implementation Summary (January 9, 2026)
### ✅ What Was Completed
**Phase 1-3: Backend Implementation (Complete)**
1. **Type System Created**
- `ProjectTemplate.ts` - Complete TypeScript interfaces for templates
- Comprehensive type definitions for components, nodes, connections, and settings
2. **EmbeddedTemplateProvider Implemented**
- Provider that handles `embedded://` protocol
- Templates stored as TypeScript objects, bundled by webpack
- No file I/O dependencies, works identically in dev and production
3. **Hello World Template Created**
- Structure: App → PageRouter → Page "/Home" → Text "Hello World!"
- Clean and minimal, demonstrates Page Router usage
- Located in `models/template/templates/hello-world.template.ts`
4. **Template Registry Integration**
- `EmbeddedTemplateProvider` registered with highest priority
- Backward compatible with existing HTTP/Noodl Docs providers
5. **LocalProjectsModel Updated**
- Removed programmatic project creation workaround
- Default template now uses `embedded://hello-world`
- Maintains backward compatibility with external templates
6. **Documentation**
- Complete developer guide in `models/template/README.md`
- Instructions for creating custom templates
- Architecture overview and best practices
### 📁 Files Created
```
packages/noodl-editor/src/editor/src/models/template/
├── ProjectTemplate.ts # Type definitions
├── EmbeddedTemplateProvider.ts # Provider implementation
├── README.md # Developer documentation
└── templates/
└── hello-world.template.ts # Default template
```
### 📝 Files Modified
- `utils/forge/index.ts` - Registered EmbeddedTemplateProvider
- `utils/LocalProjectsModel.ts` - Updated newProject() to use embedded templates
### 🎯 Benefits Achieved
✅ No more `__dirname` or `process.cwd()` path resolution issues
✅ Templates work identically in development and production builds
✅ Type-safe template definitions with full IDE support
✅ Easy to add new templates - just create a TypeScript file
✅ Maintains backward compatibility with external template URLs
### ⏳ Remaining Work (Future Tasks)
- **UI for Template Selection**: Gallery/dialog to choose templates when creating projects
- **Additional Templates**: Blank, Dashboard, E-commerce templates
- **Template Export**: Allow users to save their projects as templates
- **Unit Tests**: Test suite for EmbeddedTemplateProvider
- **Template Validation**: Verify template structure before project creation
### 🚀 Usage
```typescript
// Create project with embedded template (automatic default)
LocalProjectsModel.instance.newProject(callback, {
name: 'My Project'
// Uses 'embedded://hello-world' by default
});
// Create project with specific template
LocalProjectsModel.instance.newProject(callback, {
name: 'My Project',
projectTemplate: 'embedded://hello-world'
});
```
## Related Tasks
- None yet (this is the first comprehensive template system task)
- **TASK-009-UI**: Template selection gallery (future)
- **TASK-009-EXPORT**: Template export functionality (future)
---
**Created**: January 8, 2026
**Last Updated**: January 8, 2026
**Assignee**: TBD
**Last Updated**: January 9, 2026
**Implementation**: January 9, 2026 (Backend complete)

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@@ -0,0 +1,114 @@
/**
* EmbeddedTemplateProvider
*
* Provides access to templates that are embedded directly in the application code.
* These templates are bundled with the editor and work reliably in both
* development and production (no file I/O or path resolution issues).
*
* @module noodl-editor/models/template
*/
import { ITemplateProvider, TemplateItem } from '../../utils/forge/template/template';
import { ProjectTemplate } from './ProjectTemplate';
import { helloWorldTemplate } from './templates/hello-world.template';
/**
* Provider for templates that are embedded in the application code
*/
export class EmbeddedTemplateProvider implements ITemplateProvider {
/**
* Registry of all embedded templates
* New templates should be added here
*/
private templates: Map<string, ProjectTemplate> = new Map([
['hello-world', helloWorldTemplate]
// Add more templates here as they are created
]);
get name(): string {
return 'embedded-templates';
}
/**
* List all available embedded templates
* @returns Array of template items
*/
async list(): Promise<ReadonlyArray<TemplateItem>> {
const items: TemplateItem[] = [];
for (const [id, template] of this.templates) {
items.push({
title: template.name,
desc: template.description,
category: template.category,
iconURL: template.thumbnail || '',
projectURL: `embedded://${id}`,
useCloudServices: false,
cloudServicesTemplateURL: undefined
});
}
return items;
}
/**
* Check if this provider can handle the given URL
* @param url - The template URL to check
* @returns True if URL starts with "embedded://"
*/
async canDownload(url: string): Promise<boolean> {
return url.startsWith('embedded://');
}
/**
* "Download" (copy) the template to the destination directory
*
* Note: For embedded templates, we write the project.json directly
* rather than copying files from disk.
*
* @param url - Template URL (e.g., "embedded://hello-world")
* @param destination - Destination directory path
* @returns Promise that resolves when template is written
*/
async download(url: string, destination: string): Promise<void> {
// Extract template ID from URL
const templateId = url.replace('embedded://', '');
const template = this.templates.get(templateId);
if (!template) {
throw new Error(`Unknown embedded template: ${templateId}`);
}
// Get the template content (which will have its name overridden by the caller)
const projectContent = template.content;
// Ensure destination directory exists
const { filesystem } = await import('@noodl/platform');
// Create destination directory if it doesn't exist
if (!filesystem.exists(destination)) {
await filesystem.makeDirectory(destination);
}
// Write project.json to destination
const projectJsonPath = filesystem.join(destination, 'project.json');
await filesystem.writeFile(projectJsonPath, JSON.stringify(projectContent, null, 2));
}
/**
* Get a specific template by ID (utility method)
* @param id - Template ID
* @returns The template, or undefined if not found
*/
getTemplate(id: string): ProjectTemplate | undefined {
return this.templates.get(id);
}
/**
* Get all template IDs (utility method)
* @returns Array of template IDs
*/
getTemplateIds(): string[] {
return Array.from(this.templates.keys());
}
}

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@@ -0,0 +1,191 @@
/**
* ProjectTemplate
*
* Defines the structure for project templates that can be used
* to create new projects with pre-configured components and settings.
*
* @module noodl-editor/models/template
*/
/**
* Represents a complete project template structure
*/
export interface ProjectTemplate {
/** Unique identifier for the template */
id: string;
/** Display name of the template */
name: string;
/** Description of what the template provides */
description: string;
/** Category for grouping templates (e.g., "Getting Started", "Dashboard") */
category: string;
/** Template version (semver) */
version: string;
/** Optional thumbnail/icon URL for UI display */
thumbnail?: string;
/** The actual project content */
content: ProjectContent;
}
/**
* The core content structure of a Noodl project
*/
export interface ProjectContent {
/** Project name (will be overridden by user input) */
name: string;
/** Array of component definitions */
components: ComponentDefinition[];
/** Project-level settings */
settings?: ProjectSettings;
/** Project metadata */
metadata?: ProjectMetadata;
}
/**
* Definition of a single component in the project
*/
export interface ComponentDefinition {
/** Component name (e.g., "App", "/#__page__/Home") */
name: string;
/** Component graph structure */
graph?: ComponentGraph;
/** Whether this is a visual component */
visual?: boolean;
/** Component ID (optional, will be generated if not provided) */
id?: string;
/** Port definitions for the component */
ports?: PortDefinition[];
/** Visual state transitions (for visual components) */
visualStateTransitions?: unknown[];
/** Component metadata */
metadata?: Record<string, unknown>;
}
/**
* Component graph containing nodes and connections
*/
export interface ComponentGraph {
/** Root nodes in the component */
roots: NodeDefinition[];
/** Connections between nodes */
connections: ConnectionDefinition[];
/** Comments in the graph (required by NodeGraphModel) */
comments?: unknown[];
}
/**
* Definition of a single node in the component graph
*/
export interface NodeDefinition {
/** Unique node ID */
id: string;
/** Node type (e.g., "Group", "Text", "PageRouter") */
type: string;
/** X position on canvas */
x: number;
/** Y position on canvas */
y: number;
/** Node parameters/properties */
parameters: Record<string, unknown>;
/** Port definitions */
ports?: PortDefinition[];
/** Child nodes (for visual hierarchy) */
children?: NodeDefinition[];
/** Variant (for some node types) */
variant?: string;
/** State parameters (for state nodes) */
stateParameters?: Record<string, unknown>;
/** State transitions (for state nodes) */
stateTransitions?: unknown[];
}
/**
* Connection between two nodes
*/
export interface ConnectionDefinition {
/** Source node ID */
fromId: string;
/** Source port/property name */
fromProperty: string;
/** Target node ID */
toId: string;
/** Target port/property name */
toProperty: string;
}
/**
* Port definition for components/nodes
*/
export interface PortDefinition {
/** Port name */
name: string;
/** Port type (e.g., "string", "number", "signal") */
type: string;
/** Port direction ("input" or "output") */
plug: 'input' | 'output';
/** Port index (for ordering) */
index?: number;
/** Default value */
default?: unknown;
/** Display name */
displayName?: string;
/** Port group */
group?: string;
}
/**
* Project-level settings
*/
export interface ProjectSettings {
/** Project settings go here */
[key: string]: unknown;
}
/**
* Project metadata
*/
export interface ProjectMetadata {
/** Project title */
title?: string;
/** Project description */
description?: string;
/** Other metadata fields */
[key: string]: unknown;
}

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# Template System Documentation
This directory contains the embedded project template system implemented in TASK-009.
## Overview
The template system allows creating new Noodl projects from pre-defined templates that are embedded directly in the application code. This ensures templates work reliably in both development and production without file path resolution issues.
## Architecture
```
models/template/
├── ProjectTemplate.ts # TypeScript interfaces for templates
├── EmbeddedTemplateProvider.ts # Provider for embedded templates
├── templates/ # Template definitions
│ └── hello-world.template.ts # Default Hello World template
└── README.md # This file
```
## How It Works
1. **Template Definition**: Templates are defined as TypeScript objects using the `ProjectTemplate` interface
2. **Provider Registration**: The `EmbeddedTemplateProvider` is registered in `utils/forge/index.ts` with the highest priority
3. **Template Usage**: When creating a new project, templates are referenced via `embedded://template-id` URLs
4. **Project Creation**: The provider writes the template's `project.json` directly to the destination directory
## Creating a New Template
### Step 1: Define Your Template
Create a new file in `templates/` (e.g., `dashboard.template.ts`):
```typescript
import { ProjectTemplate } from '../ProjectTemplate';
export const dashboardTemplate: ProjectTemplate = {
id: 'dashboard',
name: 'Dashboard Template',
description: 'A dashboard with navigation and multiple pages',
category: 'Business Apps',
version: '1.0.0',
thumbnail: undefined,
content: {
name: 'Dashboard Project',
components: [
// Define your components here
{
name: 'App',
visual: true,
ports: [],
visualStateTransitions: [],
graph: {
roots: [
// Add your nodes here
],
connections: []
}
}
],
settings: {},
metadata: {
title: 'Dashboard Project',
description: 'A complete dashboard template'
}
}
};
```
### Step 2: Register the Template
Add your template to `EmbeddedTemplateProvider.ts`:
```typescript
import { dashboardTemplate } from './templates/dashboard.template';
export class EmbeddedTemplateProvider implements ITemplateProvider {
private templates: Map<string, ProjectTemplate> = new Map([
['hello-world', helloWorldTemplate],
['dashboard', dashboardTemplate] // Add your template here
]);
// ...
}
```
### Step 3: Use Your Template
Create a project with your template:
```typescript
LocalProjectsModel.instance.newProject(
(project) => {
console.log('Project created:', project);
},
{
name: 'My Dashboard',
projectTemplate: 'embedded://dashboard'
}
);
```
## Template Structure Reference
### Component Definition
```typescript
{
name: 'ComponentName', // Component name (use '/#__page__/Name' for pages)
visual: true, // Whether this is a visual component
ports: [], // Component ports
visualStateTransitions: [], // State transitions
graph: {
roots: [/* nodes */], // Root-level nodes
connections: [] // Connections between nodes
}
}
```
### Node Definition
```typescript
{
id: generateId(), // Unique node ID
type: 'NodeType', // Node type (e.g., 'Text', 'Group', 'PageRouter')
x: 100, // X position on canvas
y: 100, // Y position on canvas
parameters: { // Node parameters
text: 'Hello',
fontSize: { value: 16, unit: 'px' }
},
ports: [], // Node-specific ports
children: [] // Child nodes (for visual hierarchy)
}
```
## Best Practices
1. **Use the Helper Function**: Use the `generateId()` function for generating unique IDs
2. **Structure Over Data**: Define component structure, not specific user data
3. **Minimal & Clear**: Keep templates simple and focused on structure
4. **Test Both Modes**: Test templates in both development and production builds
5. **Document Purpose**: Add JSDoc comments explaining what the template provides
## Default Template
When no template is specified in `newProject()`, the system automatically uses `embedded://hello-world` as the default template.
## Advantages Over Previous System
**No Path Resolution Issues**: Templates are embedded in code, bundled by webpack
**Dev/Prod Parity**: Works identically in development and production
**Type Safety**: Full TypeScript support with interfaces
**Easy to Extend**: Add new templates by creating a file and registering it
**No External Dependencies**: No need for external template files or URLs
## Migration from Old System
The old system used:
- Programmatic project creation (JSON literal in code)
- File-based templates (with path resolution issues)
- External template URLs
The new system:
- Uses embedded template objects
- Provides a consistent API via `templateRegistry`
- Maintains backward compatibility with external template URLs
---
**Last Updated**: January 9, 2026
**Related**: TASK-009-template-system-refactoring

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/**
* Hello World Template
*
* A simple starter project with:
* - App component (root)
* - Page Router configured
* - Home page with "Hello World" text
*
* @module noodl-editor/models/template/templates
*/
import { ProjectTemplate } from '../ProjectTemplate';
/**
* Generate a unique ID for nodes
*/
function generateId(): string {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
const r = (Math.random() * 16) | 0;
const v = c === 'x' ? r : (r & 0x3) | 0x8;
return v.toString(16);
});
}
/**
* Hello World template
* Creates a basic project with Page Router and a home page
*/
export const helloWorldTemplate: ProjectTemplate = {
id: 'hello-world',
name: 'Hello World',
description: 'A simple starter project with a home page displaying "Hello World"',
category: 'Getting Started',
version: '1.0.0',
thumbnail: undefined,
content: {
name: 'Hello World Project',
components: [
// App component (root)
{
name: 'App',
id: generateId(),
visual: true,
ports: [],
visualStateTransitions: [],
graph: {
roots: [
{
id: generateId(),
type: 'Router',
x: 100,
y: 100,
parameters: {
startPage: '/#__page__/Home'
},
ports: [],
children: []
}
],
connections: [],
comments: []
},
metadata: {}
},
// Home Page component
{
name: '/#__page__/Home',
id: generateId(),
visual: true,
ports: [],
visualStateTransitions: [],
graph: {
roots: [
{
id: generateId(),
type: 'Text',
x: 100,
y: 100,
parameters: {
text: 'Hello World!',
fontSize: { value: 32, unit: 'px' },
textAlign: 'center'
},
ports: [],
children: []
}
],
connections: [],
comments: []
},
metadata: {}
}
],
settings: {},
metadata: {
title: 'Hello World Project',
description: 'A simple starter project'
}
}
};

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@@ -260,57 +260,21 @@ export class LocalProjectsModel extends Model {
});
});
} else {
// Create a minimal Hello World project programmatically
// This is a temporary solution until TASK-009-template-system-refactoring is implemented
const minimalProject = {
name: name,
components: [
{
name: 'App',
id: guid(),
graph: {
roots: [
{
id: guid(),
type: 'Group',
x: 0,
y: 0,
parameters: {},
ports: [],
children: [
{
id: guid(),
type: 'Text',
x: 50,
y: 50,
parameters: {
text: 'Hello World!'
},
ports: [],
children: []
}
]
}
],
connections: [],
comments: []
},
metadata: {}
}
],
settings: {},
metadata: {
title: name,
description: 'A new Noodl project'
}
};
// No template specified - use default embedded Hello World template
// This uses the template system implemented in TASK-009
const defaultTemplate = 'embedded://hello-world';
await filesystem.writeFile(filesystem.join(dirEntry, 'project.json'), JSON.stringify(minimalProject, null, 2));
// For embedded templates, write directly to the project directory
// (no need for temporary folder + copy)
const { EmbeddedTemplateProvider } = await import('../models/template/EmbeddedTemplateProvider');
const embeddedProvider = new EmbeddedTemplateProvider();
await embeddedProvider.download(defaultTemplate, dirEntry);
// Load the newly created project
projectFromDirectory(dirEntry, (project) => {
if (!project) {
console.error('Failed to create project from generated structure');
console.error('Failed to create project from template');
fn();
return;
}

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@@ -1,12 +1,15 @@
import getDocsEndpoint from '@noodl-utils/getDocsEndpoint';
import { EmbeddedTemplateProvider } from '../../models/template/EmbeddedTemplateProvider';
import { HttpTemplateProvider } from './template/providers/http-template-provider';
import { NoodlDocsTemplateProvider } from './template/providers/noodl-docs-template-provider';
import { TemplateRegistry } from './template/template-registry';
// The order of the providers matters,
// when looking for a template it will take the first one that allows it.
// EmbeddedTemplateProvider is first as it provides built-in templates that work reliably.
const templateRegistry = new TemplateRegistry([
new EmbeddedTemplateProvider(),
new NoodlDocsTemplateProvider(getDocsEndpoint),
new HttpTemplateProvider()
]);