mcp-servers/viz-platform/mcp_server/page_tools.py

@@ -0,0 +1,366 @@
+"""
+Multi-page app tools for viz-platform.
+
+Provides tools for building complete Dash applications with routing and navigation.
+"""
+import logging
+from typing import Dict, List, Optional, Any
+from uuid import uuid4
+
+logger = logging.getLogger(__name__)
+
+
+# Navigation position options
+NAV_POSITIONS = ["top", "left", "right"]
+
+# Auth types supported
+AUTH_TYPES = ["none", "basic", "oauth", "custom"]
+
+
+class PageTools:
+    """
+    Multi-page Dash application tools.
+
+    Creates page definitions, navigation, and auth configuration.
+    """
+
+    def __init__(self):
+        """Initialize page tools."""
+        self._pages: Dict[str, Dict[str, Any]] = {}
+        self._navbars: Dict[str, Dict[str, Any]] = {}
+        self._app_config: Dict[str, Any] = {
+            "title": "Dash App",
+            "suppress_callback_exceptions": True
+        }
+
+    async def page_create(
+        self,
+        name: str,
+        path: str,
+        layout_ref: Optional[str] = None,
+        title: Optional[str] = None
+    ) -> Dict[str, Any]:
+        """
+        Create a new page definition.
+
+        Args:
+            name: Unique page name (used as identifier)
+            path: URL path for the page (e.g., "/", "/settings")
+            layout_ref: Optional layout reference to use for the page
+            title: Optional page title (defaults to name)
+
+        Returns:
+            Dict with:
+                - page_ref: Reference to use in other tools
+                - path: URL path
+                - registered: Whether page was registered
+        """
+        # Validate path format
+        if not path.startswith('/'):
+            return {
+                "error": f"Path must start with '/'. Got: {path}",
+                "page_ref": None
+            }
+
+        # Check for name collision
+        if name in self._pages:
+            return {
+                "error": f"Page '{name}' already exists. Use a different name.",
+                "page_ref": name
+            }
+
+        # Check for path collision
+        for page_name, page_data in self._pages.items():
+            if page_data['path'] == path:
+                return {
+                    "error": f"Path '{path}' already used by page '{page_name}'.",
+                    "page_ref": None
+                }
+
+        # Create page definition
+        page = {
+            "id": str(uuid4()),
+            "name": name,
+            "path": path,
+            "title": title or name,
+            "layout_ref": layout_ref,
+            "auth": None,
+            "metadata": {}
+        }
+
+        self._pages[name] = page
+
+        return {
+            "page_ref": name,
+            "path": path,
+            "title": page["title"],
+            "layout_ref": layout_ref,
+            "registered": True
+        }
+
+    async def page_add_navbar(
+        self,
+        pages: List[str],
+        options: Optional[Dict[str, Any]] = None
+    ) -> Dict[str, Any]:
+        """
+        Generate a navigation component linking pages.
+
+        Args:
+            pages: List of page names to include in navigation
+            options: Navigation options:
+                - position: "top", "left", or "right"
+                - style: Style variant
+                - brand: Brand/logo text or config
+                - collapsible: Whether to collapse on mobile
+
+        Returns:
+            Dict with:
+                - navbar_id: Navigation ID
+                - pages: List of page links generated
+                - component: DMC component structure
+        """
+        options = options or {}
+
+        # Validate pages exist
+        missing_pages = [p for p in pages if p not in self._pages]
+        if missing_pages:
+            return {
+                "error": f"Pages not found: {missing_pages}. Create them first.",
+                "navbar_id": None
+            }
+
+        # Validate position
+        position = options.get("position", "top")
+        if position not in NAV_POSITIONS:
+            return {
+                "error": f"Invalid position '{position}'. Must be one of: {NAV_POSITIONS}",
+                "navbar_id": None
+            }
+
+        # Generate navbar ID
+        navbar_id = f"navbar_{len(self._navbars)}"
+
+        # Build page links
+        page_links = []
+        for page_name in pages:
+            page = self._pages[page_name]
+            page_links.append({
+                "label": page["title"],
+                "href": page["path"],
+                "page_ref": page_name
+            })
+
+        # Build DMC component structure
+        if position == "top":
+            component = self._build_top_navbar(page_links, options)
+        else:
+            component = self._build_side_navbar(page_links, options, position)
+
+        # Store navbar config
+        self._navbars[navbar_id] = {
+            "id": navbar_id,
+            "position": position,
+            "pages": pages,
+            "options": options,
+            "component": component
+        }
+
+        return {
+            "navbar_id": navbar_id,
+            "position": position,
+            "pages": page_links,
+            "component": component
+        }
+
+    async def page_set_auth(
+        self,
+        page_ref: str,
+        auth_config: Dict[str, Any]
+    ) -> Dict[str, Any]:
+        """
+        Configure authentication for a page.
+
+        Args:
+            page_ref: Page name to configure
+            auth_config: Authentication configuration:
+                - type: "none", "basic", "oauth", "custom"
+                - required: Whether auth is required (default True)
+                - roles: List of required roles (optional)
+                - redirect: Redirect path for unauthenticated users
+
+        Returns:
+            Dict with:
+                - page_ref: Page reference
+                - auth_type: Type of auth configured
+                - protected: Whether page is protected
+        """
+        # Validate page exists
+        if page_ref not in self._pages:
+            available = list(self._pages.keys())
+            return {
+                "error": f"Page '{page_ref}' not found. Available: {available}",
+                "page_ref": page_ref
+            }
+
+        # Validate auth type
+        auth_type = auth_config.get("type", "basic")
+        if auth_type not in AUTH_TYPES:
+            return {
+                "error": f"Invalid auth type '{auth_type}'. Must be one of: {AUTH_TYPES}",
+                "page_ref": page_ref
+            }
+
+        # Build auth config
+        auth = {
+            "type": auth_type,
+            "required": auth_config.get("required", True),
+            "roles": auth_config.get("roles", []),
+            "redirect": auth_config.get("redirect", "/login")
+        }
+
+        # Handle OAuth-specific config
+        if auth_type == "oauth":
+            auth["provider"] = auth_config.get("provider", "generic")
+            auth["scopes"] = auth_config.get("scopes", [])
+
+        # Update page
+        self._pages[page_ref]["auth"] = auth
+
+        return {
+            "page_ref": page_ref,
+            "auth_type": auth_type,
+            "protected": auth["required"],
+            "roles": auth["roles"],
+            "redirect": auth["redirect"]
+        }
+
+    async def page_list(self) -> Dict[str, Any]:
+        """
+        List all registered pages.
+
+        Returns:
+            Dict with pages and their configurations
+        """
+        pages_info = {}
+        for name, page in self._pages.items():
+            pages_info[name] = {
+                "path": page["path"],
+                "title": page["title"],
+                "layout_ref": page["layout_ref"],
+                "protected": page["auth"] is not None and page["auth"].get("required", False)
+            }
+
+        return {
+            "pages": pages_info,
+            "count": len(pages_info),
+            "navbars": list(self._navbars.keys())
+        }
+
+    async def page_get_app_config(self) -> Dict[str, Any]:
+        """
+        Get the complete app configuration for Dash.
+
+        Returns:
+            Dict with app config including pages, navbars, and settings
+        """
+        # Build pages config
+        pages_config = []
+        for name, page in self._pages.items():
+            pages_config.append({
+                "name": name,
+                "path": page["path"],
+                "title": page["title"],
+                "layout_ref": page["layout_ref"]
+            })
+
+        # Build routing config
+        routes = {page["path"]: name for name, page in self._pages.items()}
+
+        return {
+            "app": self._app_config,
+            "pages": pages_config,
+            "routes": routes,
+            "navbars": list(self._navbars.values()),
+            "page_count": len(self._pages)
+        }
+
+    def _build_top_navbar(
+        self,
+        page_links: List[Dict[str, str]],
+        options: Dict[str, Any]
+    ) -> Dict[str, Any]:
+        """Build a top navigation bar component."""
+        brand = options.get("brand", "App")
+
+        # Build nav links
+        nav_items = []
+        for link in page_links:
+            nav_items.append({
+                "component": "NavLink",
+                "props": {
+                    "label": link["label"],
+                    "href": link["href"]
+                }
+            })
+
+        return {
+            "component": "AppShell.Header",
+            "children": [
+                {
+                    "component": "Group",
+                    "props": {"justify": "space-between", "h": "100%", "px": "md"},
+                    "children": [
+                        {
+                            "component": "Text",
+                            "props": {"size": "lg", "fw": 700},
+                            "children": brand
+                        },
+                        {
+                            "component": "Group",
+                            "props": {"gap": "sm"},
+                            "children": nav_items
+                        }
+                    ]
+                }
+            ]
+        }
+
+    def _build_side_navbar(
+        self,
+        page_links: List[Dict[str, str]],
+        options: Dict[str, Any],
+        position: str
+    ) -> Dict[str, Any]:
+        """Build a side navigation bar component."""
+        brand = options.get("brand", "App")
+
+        # Build nav links
+        nav_items = []
+        for link in page_links:
+            nav_items.append({
+                "component": "NavLink",
+                "props": {
+                    "label": link["label"],
+                    "href": link["href"]
+                }
+            })
+
+        navbar_component = "AppShell.Navbar" if position == "left" else "AppShell.Aside"
+
+        return {
+            "component": navbar_component,
+            "props": {"p": "md"},
+            "children": [
+                {
+                    "component": "Text",
+                    "props": {"size": "lg", "fw": 700, "mb": "md"},
+                    "children": brand
+                },
+                {
+                    "component": "Stack",
+                    "props": {"gap": "xs"},
+                    "children": nav_items
+                }
+            ]
+        }

mcp-servers/viz-platform/mcp_server/server.py

@@ -16,6 +16,7 @@ from .dmc_tools import DMCTools
 from .chart_tools import ChartTools
 from .layout_tools import LayoutTools
 from .theme_tools import ThemeTools
+from .page_tools import PageTools
 
 # Suppress noisy MCP validation warnings on stderr
 logging.basicConfig(level=logging.INFO)
@@ -34,8 +35,7 @@ class VizPlatformMCPServer:
         self.chart_tools = ChartTools()
         self.layout_tools = LayoutTools()
         self.theme_tools = ThemeTools()
-        # Tool handlers will be added in subsequent issues
-        # self.page_tools = None
+        self.page_tools = PageTools()
 
     async def initialize(self):
         """Initialize server and load configuration."""
@@ -370,9 +370,86 @@ class VizPlatformMCPServer:
             ))
 
             # Page tools (Issue #176)
-            # - page_create
-            # - page_add_navbar
-            # - page_set_auth
+            tools.append(Tool(
+                name="page_create",
+                description=(
+                    "Create a new page for a multi-page Dash application. "
+                    "Defines page routing and can link to a layout."
+                ),
+                inputSchema={
+                    "type": "object",
+                    "properties": {
+                        "name": {
+                            "type": "string",
+                            "description": "Unique page name (identifier)"
+                        },
+                        "path": {
+                            "type": "string",
+                            "description": "URL path (e.g., '/', '/settings')"
+                        },
+                        "layout_ref": {
+                            "type": "string",
+                            "description": "Optional layout reference to use"
+                        },
+                        "title": {
+                            "type": "string",
+                            "description": "Page title (defaults to name)"
+                        }
+                    },
+                    "required": ["name", "path"]
+                }
+            ))
+
+            tools.append(Tool(
+                name="page_add_navbar",
+                description=(
+                    "Generate navigation component linking pages. "
+                    "Creates top or side navigation with DMC components."
+                ),
+                inputSchema={
+                    "type": "object",
+                    "properties": {
+                        "pages": {
+                            "type": "array",
+                            "items": {"type": "string"},
+                            "description": "List of page names to include"
+                        },
+                        "options": {
+                            "type": "object",
+                            "description": (
+                                "Navigation options: position (top|left|right), "
+                                "brand (app name), collapsible (bool)"
+                            )
+                        }
+                    },
+                    "required": ["pages"]
+                }
+            ))
+
+            tools.append(Tool(
+                name="page_set_auth",
+                description=(
+                    "Configure authentication for a page. "
+                    "Sets auth requirements, roles, and redirect behavior."
+                ),
+                inputSchema={
+                    "type": "object",
+                    "properties": {
+                        "page_ref": {
+                            "type": "string",
+                            "description": "Page name to configure"
+                        },
+                        "auth_config": {
+                            "type": "object",
+                            "description": (
+                                "Auth config: type (none|basic|oauth|custom), "
+                                "required (bool), roles (array), redirect (path)"
+                            )
+                        }
+                    },
+                    "required": ["page_ref", "auth_config"]
+                }
+            ))
 
             return tools
 
@@ -547,7 +624,50 @@ class VizPlatformMCPServer:
                         text=json.dumps(result, indent=2)
                     )]
 
-                # Page tools (Issue #176)
+                # Page tools
+                elif name == "page_create":
+                    page_name = arguments.get('name')
+                    path = arguments.get('path')
+                    layout_ref = arguments.get('layout_ref')
+                    title = arguments.get('title')
+                    if not page_name or not path:
+                        return [TextContent(
+                            type="text",
+                            text=json.dumps({"error": "name and path are required"}, indent=2)
+                        )]
+                    result = await self.page_tools.page_create(page_name, path, layout_ref, title)
+                    return [TextContent(
+                        type="text",
+                        text=json.dumps(result, indent=2)
+                    )]
+
+                elif name == "page_add_navbar":
+                    pages = arguments.get('pages', [])
+                    options = arguments.get('options', {})
+                    if not pages:
+                        return [TextContent(
+                            type="text",
+                            text=json.dumps({"error": "pages list is required"}, indent=2)
+                        )]
+                    result = await self.page_tools.page_add_navbar(pages, options)
+                    return [TextContent(
+                        type="text",
+                        text=json.dumps(result, indent=2)
+                    )]
+
+                elif name == "page_set_auth":
+                    page_ref = arguments.get('page_ref')
+                    auth_config = arguments.get('auth_config', {})
+                    if not page_ref:
+                        return [TextContent(
+                            type="text",
+                            text=json.dumps({"error": "page_ref is required"}, indent=2)
+                        )]
+                    result = await self.page_tools.page_set_auth(page_ref, auth_config)
+                    return [TextContent(
+                        type="text",
+                        text=json.dumps(result, indent=2)
+                    )]
 
                 raise ValueError(f"Unknown tool: {name}")