aminghadersohi commented on code in PR #40958: URL: https://github.com/apache/superset/pull/40958#discussion_r3477190635
########## superset/mcp_service/dashboard/tool/remove_chart_from_dashboard.py: ########## @@ -0,0 +1,439 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +""" +MCP tool: remove_chart_from_dashboard + +This tool removes a chart from an existing dashboard. It is the inverse of +add_chart_to_existing_dashboard: it deletes the chart's CHART component(s) +from position_json (pruning ROW/COLUMN containers that become empty), +removes the chart from the dashboard's slices relationship, and cleans +stale references to the chart from json_metadata (expanded_slices, +timed_refresh_immune_slices, filter_scopes). +""" + +import logging +from typing import Any, Dict + +from fastmcp import Context +from sqlalchemy.exc import SQLAlchemyError +from superset_core.mcp.decorators import tool, ToolAnnotations + +from superset.commands.exceptions import CommandException +from superset.extensions import event_logger +from superset.mcp_service.dashboard.schemas import ( + DashboardInfo, + RemoveChartFromDashboardRequest, + RemoveChartFromDashboardResponse, + serialize_chart_summary, +) +from superset.mcp_service.privacy import user_can_view_data_model_metadata +from superset.mcp_service.utils.url_utils import get_superset_base_url +from superset.utils import json + +logger = logging.getLogger(__name__) + +# Container types that should be deleted once they have no children left. +# TAB/TABS/GRID/ROOT containers are intentionally kept even when empty — +# deleting a TAB would silently change the dashboard's visible structure. +_PRUNABLE_TYPES = ("ROW", "COLUMN") + + +def _find_chart_keys(layout: Dict[str, Any], chart_id: int) -> list[str]: + """Return all layout keys of CHART components referencing *chart_id*. + + A chart can legitimately appear more than once in a layout (e.g. under + multiple tabs), so all occurrences are returned. + """ + return [ + key + for key, node in layout.items() + if isinstance(node, dict) + and node.get("type") == "CHART" + and (node.get("meta") or {}).get("chartId") == chart_id + ] Review Comment: Fixed in af9ac74: `_find_chart_keys` now matches `chartId` against both `int` and `str(chart_id)`, mirroring the same defensive pattern already used in `_remove_id_from_list` for `timed_refresh_immune_slices`. ########## superset/mcp_service/dashboard/tool/remove_chart_from_dashboard.py: ########## @@ -0,0 +1,439 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +""" +MCP tool: remove_chart_from_dashboard + +This tool removes a chart from an existing dashboard. It is the inverse of +add_chart_to_existing_dashboard: it deletes the chart's CHART component(s) +from position_json (pruning ROW/COLUMN containers that become empty), +removes the chart from the dashboard's slices relationship, and cleans +stale references to the chart from json_metadata (expanded_slices, +timed_refresh_immune_slices, filter_scopes). +""" + +import logging +from typing import Any, Dict + +from fastmcp import Context +from sqlalchemy.exc import SQLAlchemyError +from superset_core.mcp.decorators import tool, ToolAnnotations + +from superset.commands.exceptions import CommandException +from superset.extensions import event_logger +from superset.mcp_service.dashboard.schemas import ( + DashboardInfo, + RemoveChartFromDashboardRequest, + RemoveChartFromDashboardResponse, + serialize_chart_summary, +) +from superset.mcp_service.privacy import user_can_view_data_model_metadata +from superset.mcp_service.utils.url_utils import get_superset_base_url +from superset.utils import json + +logger = logging.getLogger(__name__) + +# Container types that should be deleted once they have no children left. +# TAB/TABS/GRID/ROOT containers are intentionally kept even when empty — +# deleting a TAB would silently change the dashboard's visible structure. +_PRUNABLE_TYPES = ("ROW", "COLUMN") + + +def _find_chart_keys(layout: Dict[str, Any], chart_id: int) -> list[str]: + """Return all layout keys of CHART components referencing *chart_id*. + + A chart can legitimately appear more than once in a layout (e.g. under + multiple tabs), so all occurrences are returned. + """ + return [ + key + for key, node in layout.items() + if isinstance(node, dict) + and node.get("type") == "CHART" + and (node.get("meta") or {}).get("chartId") == chart_id + ] + + +def _find_parent_key(layout: Dict[str, Any], component_key: str) -> str | None: + """Find the component whose children list contains *component_key*. + + The reverse lookup scans children lists instead of trusting the + ``parents`` metadata on the node, which can be stale in hand-edited or + programmatically generated layouts. + """ + for key, node in layout.items(): + if not isinstance(node, dict): + continue + children = node.get("children") + if isinstance(children, list) and component_key in children: + return key + return None + + +def _remove_component_and_prune( + layout: Dict[str, Any], component_key: str +) -> list[str]: + """Remove *component_key* from the layout and prune empty containers. + + Walks up the parent chain deleting ROW/COLUMN containers that become + empty as a result of the removal, so no orphaned wrapper nodes are left + behind. Returns the list of removed layout keys. + """ + removed: list[str] = [] + parent_key = _find_parent_key(layout, component_key) + + layout.pop(component_key, None) + removed.append(component_key) + + child_key = component_key + while parent_key is not None: + parent = layout.get(parent_key) + if not isinstance(parent, dict): + break + children = parent.get("children") + if isinstance(children, list): + parent["children"] = [c for c in children if c != child_key] + if parent.get("type") in _PRUNABLE_TYPES and not parent.get("children"): + grandparent_key = _find_parent_key(layout, parent_key) + layout.pop(parent_key, None) + removed.append(parent_key) + child_key = parent_key + parent_key = grandparent_key + else: + break + + return removed + + +def _remove_chart_from_layout(layout: Dict[str, Any], chart_id: int) -> list[str]: + """Remove every CHART component for *chart_id* from the layout. + + Returns all removed layout keys (charts plus pruned containers). + """ + removed: list[str] = [] + for chart_key in _find_chart_keys(layout, chart_id): + # The chart key may already be gone if it shared a pruned container. + if chart_key in layout: + removed.extend(_remove_component_and_prune(layout, chart_key)) + return removed + + +def _remove_id_from_list(values: Any, chart_id: int) -> tuple[Any, bool]: + """Return (new_list, changed) with *chart_id* removed from a list of IDs. + + Handles both int and str representations since json_metadata is + user/frontend-authored and not strictly typed. + """ + if not isinstance(values, list): + return values, False + filtered = [v for v in values if v != chart_id and v != str(chart_id)] + return filtered, len(filtered) != len(values) + + +def _clean_json_metadata(metadata: Dict[str, Any], chart_id: int) -> bool: + """Remove stale references to *chart_id* from a json_metadata dict. + + Cleans ``expanded_slices`` (dict keyed by chart ID), ``filter_scopes`` + (dict keyed by filter chart ID, with per-column ``immune`` ID lists), + and ``timed_refresh_immune_slices`` (list of chart IDs). Mutates + *metadata* in place and returns True when anything changed. + """ + changed = False + chart_key = str(chart_id) + + expanded_slices = metadata.get("expanded_slices") + if isinstance(expanded_slices, dict) and chart_key in expanded_slices: + del expanded_slices[chart_key] + changed = True + + immune_slices, immune_changed = _remove_id_from_list( + metadata.get("timed_refresh_immune_slices"), chart_id + ) + if immune_changed: + metadata["timed_refresh_immune_slices"] = immune_slices + changed = True + + filter_scopes = metadata.get("filter_scopes") + if isinstance(filter_scopes, dict): + if chart_key in filter_scopes: + del filter_scopes[chart_key] + changed = True + for column_scopes in filter_scopes.values(): + if not isinstance(column_scopes, dict): + continue + for column_config in column_scopes.values(): + if not isinstance(column_config, dict): + continue + immune, immune_changed = _remove_id_from_list( + column_config.get("immune"), chart_id + ) + if immune_changed: + column_config["immune"] = immune + changed = True + + return changed + + +def _find_and_authorize_dashboard( + dashboard_id: int, +) -> tuple[Any, RemoveChartFromDashboardResponse | None]: + """Return (dashboard, None) on success or (None, error_response) on failure. + + Handles both the not-found case and the ownership check so the main tool + function doesn't need two separate branches for these pre-conditions. + """ + from superset import security_manager + from superset.daos.dashboard import DashboardDAO + from superset.exceptions import SupersetSecurityException + + dashboard = DashboardDAO.find_by_id(dashboard_id) + if not dashboard: + return None, RemoveChartFromDashboardResponse( + dashboard=None, + dashboard_url=None, + error=( + f"Dashboard with ID {dashboard_id} not found." + " Use list_dashboards to get valid dashboard IDs." + ), + ) + + try: + security_manager.raise_for_ownership(dashboard) + except SupersetSecurityException: + return None, RemoveChartFromDashboardResponse( + dashboard=None, + dashboard_url=None, + permission_denied=True, + error=( + f"You don't have permission to edit dashboard " + f"'{dashboard.dashboard_title}' (ID: {dashboard_id}). " + "Inform the user and do not attempt a workaround without " + "their confirmation." + ), + ) + + return dashboard, None + + +@tool( + tags=["mutate"], + class_permission_name="Dashboard", + method_permission_name="write", + annotations=ToolAnnotations( + title="Remove chart from dashboard", + readOnlyHint=False, + destructiveHint=True, + ), +) +def remove_chart_from_dashboard( # noqa: C901 — complexity is structural (layout traversal + multi-step authorization), not accidental + request: RemoveChartFromDashboardRequest, ctx: Context +) -> RemoveChartFromDashboardResponse: + """ + Remove a chart from an existing dashboard. + + Deletes the chart's layout component(s) from the dashboard (all + occurrences, including under tabs), prunes rows/columns left empty by + the removal, detaches the chart from the dashboard, and cleans stale + chart references from dashboard metadata (expanded_slices, + timed_refresh_immune_slices, filter_scopes). The chart itself is NOT + deleted and remains available to other dashboards. + """ + try: + from superset import db + from superset.commands.dashboard.update import UpdateDashboardCommand + + # Validate dashboard exists and user has edit permission + with event_logger.log_context( + action="mcp.remove_chart_from_dashboard.validation" + ): + dashboard, auth_error = _find_and_authorize_dashboard(request.dashboard_id) + if auth_error is not None: + return auth_error + + # Remove the chart from the layout tree + with event_logger.log_context(action="mcp.remove_chart_from_dashboard.layout"): + try: + current_layout = json.loads(dashboard.position_json or "{}") + except (json.JSONDecodeError, TypeError): + current_layout = {} + + remaining_slices = [ + slc for slc in dashboard.slices if slc.id != request.chart_id + ] + chart_in_slices = len(remaining_slices) != len(dashboard.slices) + + removed_keys = _remove_chart_from_layout(current_layout, request.chart_id) Review Comment: Fixed in af9ac74: added `if not isinstance(current_layout, dict): current_layout = {}` after the `json.loads` call, so a valid-but-non-dict payload (e.g. `"[]"`) falls back to an empty dict instead of raising `AttributeError` when `.items()` is called. -- This is an automated message from the Apache Git Service. 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