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Custom Canvas Components API Endpoints
REST API for managing custom HTML/CSS/JS canvas components with:
- Component CRUD operations
- Version control and rollback
- Usage tracking and statistics
- Security validation and governance
Endpoints:
- POST /api/components/create - Create new component
- GET /api/components - List components (with filters)
- GET /api/components/{id} - Get component by ID
- GET /api/components/by-slug/{slug} - Get component by slug
- PUT /api/components/{id} - Update component
- DELETE /api/components/{id} - Delete component
- GET /api/components/{id}/versions - Get version history
- POST /api/components/{id}/rollback - Rollback to version
- GET /api/components/{id}/stats - Get usage statistics
"""
import logging
from typing import Any, Dict, Optional
from fastapi import Depends, Query
from pydantic import BaseModel, Field
from sqlalchemy.orm import Session
from core.base_routes import BaseAPIRouter
from core.custom_components_service import ComponentSecurityError, CustomComponentsService
from core.database import get_db
logger = logging.getLogger(__name__)
router = BaseAPIRouter(prefix="/api/components", tags=["Custom Components"])
# ============================================================================
# Request/Response Models
# ============================================================================
class CreateComponentRequest(BaseModel):
"""Request to create a custom component."""
name: str = Field(..., description="Component name")
html_content: str = Field(..., description="HTML template")
css_content: Optional[str] = Field(None, description="CSS styles")
js_content: Optional[str] = Field(None, description="JavaScript behavior (AUTONOMOUS only)")
description: Optional[str] = Field(None, description="Component description")
category: str = Field(default="custom", description="Component category")
props_schema: Optional[Dict[str, Any]] = Field(None, description="JSON schema for properties")
default_props: Optional[Dict[str, Any]] = Field(None, description="Default property values")
dependencies: Optional[list[str]] = Field(None, description="External library dependencies")
is_public: bool = Field(default=False, description="Share with other users")
agent_id: Optional[str] = Field(None, description="Agent creating component (for governance)")
class UpdateComponentRequest(BaseModel):
"""Request to update a component."""
name: Optional[str] = Field(None, description="Component name")
html_content: Optional[str] = Field(None, description="HTML template")
css_content: Optional[str] = Field(None, description="CSS styles")
js_content: Optional[str] = Field(None, description="JavaScript behavior")
description: Optional[str] = Field(None, description="Component description")
props_schema: Optional[Dict[str, Any]] = Field(None, description="JSON schema for properties")
default_props: Optional[Dict[str, Any]] = Field(None, description="Default property values")
dependencies: Optional[list[str]] = Field(None, description="External library dependencies")
is_public: Optional[bool] = Field(None, description="Share with other users")
change_description: Optional[str] = Field(None, description="Description of changes")
agent_id: Optional[str] = Field(None, description="Agent updating component (for governance)")
class RollbackComponentRequest(BaseModel):
"""Request to rollback a component."""
target_version: int = Field(..., description="Version number to restore")
class RecordUsageRequest(BaseModel):
"""Request to record component usage."""
canvas_id: str = Field(..., description="Canvas where component was used")
session_id: Optional[str] = Field(None, description="Canvas session ID")
agent_id: Optional[str] = Field(None, description="Agent that rendered component")
props_passed: Optional[Dict[str, Any]] = Field(None, description="Properties passed to component")
rendering_time_ms: Optional[int] = Field(None, description="Rendering time in milliseconds")
error_message: Optional[str] = Field(None, description="Any rendering errors")
governance_check_passed: Optional[bool] = Field(None, description="Governance check result")
agent_maturity_level: Optional[str] = Field(None, description="Agent maturity level")
# ============================================================================
# Component CRUD Endpoints
# ============================================================================
@router.post("/create")
async def create_component(
request: CreateComponentRequest,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Create a new custom component.
Creates a custom HTML/CSS/JS component with security validation
and governance checks.
**Security Requirements**:
- HTML/CSS components: SUPERVISED+ maturity
- JavaScript components: AUTONOMOUS maturity only
Request Body:
- name: Component name
- html_content: HTML template
- css_content: Optional CSS styles
- js_content: Optional JavaScript (AUTONOMOUS required)
- description: Component description
- category: Component category
- props_schema: JSON schema for component properties
- default_props: Default property values
- dependencies: External library URLs (whitelist enforced)
- is_public: Share with other users
- agent_id: Agent creating component (for governance check)
Query Parameters:
- user_id: Owner user ID
Response:
Created component data with ID, slug, and version
"""
service = CustomComponentsService(db)
try:
result = service.create_component(
user_id=user_id,
name=request.name,
html_content=request.html_content,
css_content=request.css_content,
js_content=request.js_content,
description=request.description,
category=request.category,
props_schema=request.props_schema,
default_props=request.default_props,
dependencies=request.dependencies,
is_public=request.is_public,
agent_id=request.agent_id
)
if "error" in result:
raise router.validation_error(
field="component",
message=result.get("error", "Operation failed")
)
return router.success_response(
data=result,
message="Operation completed successfully"
)
except ComponentSecurityError as e:
raise router.permission_denied_error(
action="component_operation",
resource="CustomComponent",
details={"reason": str(e)}
)
@router.get("")
async def list_components(
user_id: Optional[str] = Query(None, description="User ID (for private components)"),
category: Optional[str] = Query(None, description="Filter by category"),
is_public: Optional[bool] = Query(None, description="Filter by public/private"),
limit: int = Query(50, ge=1, le=100, description="Max results"),
db: Session = Depends(get_db)
):
"""
List components with optional filtering.
Returns user's own components plus public components.
Query Parameters:
- user_id: User ID (to include private components)
- category: Filter by category
- is_public: Filter by public/private
- limit: Maximum results
Response:
List of components with summary info
"""
service = CustomComponentsService(db)
result = service.list_components(
user_id=user_id,
category=category,
is_public=is_public,
limit=limit
)
return router.success_response(
data=result.get("components", result),
message=f"Retrieved {len(result.get('components', []))} components"
)
@router.get("/{component_id}")
async def get_component(
component_id: str,
user_id: Optional[str] = Query(None, description="User ID for permission check"),
db: Session = Depends(get_db)
):
"""
Get a component by ID.
Returns component HTML/CSS/JS content. JavaScript content
is only returned to component owners.
Path Parameters:
- component_id: Component ID
Query Parameters:
- user_id: User ID (for permission check)
Response:
Full component data including code
"""
service = CustomComponentsService(db)
result = service.get_component(
component_id=component_id,
user_id=user_id
)
if "error" in result:
raise router.not_found_error(
resource="Component",
resource_id=component_id if 'component_id' in locals() else slug,
details={"error": result.get("error")}
)
return router.success_response(
data=result,
message="Component retrieved successfully"
)
@router.get("/by-slug/{slug}")
async def get_component_by_slug(
slug: str,
user_id: Optional[str] = Query(None, description="User ID for permission check"),
db: Session = Depends(get_db)
):
"""
Get a component by slug.
Alternative lookup method using URL-friendly slug.
Path Parameters:
- slug: Component slug
Query Parameters:
- user_id: User ID (for permission check)
Response:
Full component data including code
"""
service = CustomComponentsService(db)
result = service.get_component(
slug=slug,
user_id=user_id
)
if "error" in result:
raise router.not_found_error(
resource="Component",
resource_id=component_id if 'component_id' in locals() else slug,
details={"error": result.get("error")}
)
return router.success_response(
data=result,
message="Component retrieved successfully"
)
@router.put("/{component_id}")
async def update_component(
component_id: str,
request: UpdateComponentRequest,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Update an existing component.
Creates a new version with the updated content.
Only component owners can update components.
Path Parameters:
- component_id: Component to update
Query Parameters:
- user_id: User ID (must be owner)
Request Body:
Fields to update (same as create)
Response:
Updated component data with new version number
"""
service = CustomComponentsService(db)
try:
result = service.update_component(
component_id=component_id,
user_id=user_id,
name=request.name,
html_content=request.html_content,
css_content=request.css_content,
js_content=request.js_content,
description=request.description,
props_schema=request.props_schema,
default_props=request.default_props,
dependencies=request.dependencies,
is_public=request.is_public,
change_description=request.change_description,
agent_id=request.agent_id
)
if "error" in result:
raise router.validation_error(
field="component",
message=result.get("error", "Operation failed")
)
return router.success_response(
data=result,
message="Operation completed successfully"
)
except ComponentSecurityError as e:
raise router.permission_denied_error(
action="component_operation",
resource="CustomComponent",
details={"reason": str(e)}
)
@router.delete("/{component_id}")
async def delete_component(
component_id: str,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Delete a component (soft delete).
Sets is_active=False. Only component owners can delete.
Path Parameters:
- component_id: Component to delete
Query Parameters:
- user_id: User ID (must be owner)
Response:
Deletion confirmation
"""
service = CustomComponentsService(db)
result = service.delete_component(
component_id=component_id,
user_id=user_id
)
if "error" in result:
raise router.validation_error(
field="component",
message=result["error"]
)
return result
# ============================================================================
# Version Control Endpoints
# ============================================================================
@router.get("/{component_id}/versions")
async def get_component_versions(
component_id: str,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Get version history for a component.
Returns all versions with change descriptions.
Only component owners can view version history.
Path Parameters:
- component_id: Component ID
Query Parameters:
- user_id: User ID (must be owner)
Response:
List of versions with metadata
"""
service = CustomComponentsService(db)
result = service.get_component_versions(
component_id=component_id,
user_id=user_id
)
if "error" in result:
raise router.validation_error(
field="component",
message=result["error"]
)
return result
@router.post("/{component_id}/rollback")
async def rollback_component(
component_id: str,
request: RollbackComponentRequest,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Rollback component to a previous version.
Creates a new version with content from the target version.
Only component owners can rollback.
Path Parameters:
- component_id: Component to rollback
Query Parameters:
- user_id: User ID (must be owner)
Request Body:
- target_version: Version number to restore
Response:
Rollback result with new version number
"""
service = CustomComponentsService(db)
result = service.rollback_component(
component_id=component_id,
target_version=request.target_version,
user_id=user_id
)
if "error" in result:
raise router.validation_error(
field="component",
message=result["error"]
)
return result
# ============================================================================
# Usage Tracking Endpoints
# ============================================================================
@router.post("/{component_id}/record-usage")
async def record_component_usage(
component_id: str,
request: RecordUsageRequest,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Record component usage on a canvas.
Called when a component is rendered on a canvas.
Path Parameters:
- component_id: Component that was used
Query Parameters:
- user_id: User who rendered component
Request Body:
- canvas_id: Canvas where component was used
- session_id: Optional canvas session
- agent_id: Optional agent that rendered component
- props_passed: Properties passed to component
- rendering_time_ms: Rendering performance
- error_message: Any rendering errors
- governance_check_passed: Governance check result
- agent_maturity_level: Agent maturity level
Response:
Usage record confirmation
"""
service = CustomComponentsService(db)
result = service.record_component_usage(
component_id=component_id,
canvas_id=request.canvas_id,
user_id=user_id,
session_id=request.session_id,
agent_id=request.agent_id,
props_passed=request.props_passed,
rendering_time_ms=request.rendering_time_ms,
error_message=request.error_message,
governance_check_passed=request.governance_check_passed,
agent_maturity_level=request.agent_maturity_level
)
if "error" in result:
raise router.validation_error(
field="component",
message=result["error"]
)
return result
@router.get("/{component_id}/stats")
async def get_component_stats(
component_id: str,
user_id: str = Query(..., description="User ID"),
db: Session = Depends(get_db)
):
"""
Get usage statistics for a component.
Returns detailed usage metrics including render counts,
success rates, and top canvases.
Path Parameters:
- component_id: Component ID
Query Parameters:
- user_id: User ID (must be owner)
Response:
Usage statistics
"""
service = CustomComponentsService(db)
result = service.get_component_usage_stats(
component_id=component_id,
user_id=user_id
)
if "error" in result:
raise router.validation_error(
field="component",
message=result["error"]
)
return result
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