feat: export dashboards as ZIP files (#11351)

* Export datasets as ZIP files

* Add logging when failing to parse extra

* Export datasets as ZIP files

* Export charts as Zip file

* Export dashboards as a Zip file

* Add logging

superset/dashboards/commands/export.py

@@ -0,0 +1,84 @@
+# 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.
+# isort:skip_file
+
+import json
+import logging
+from typing import Iterator, List, Tuple
+
+import yaml
+
+from superset.commands.base import BaseCommand
+from superset.charts.commands.export import ExportChartsCommand
+from superset.dashboards.commands.exceptions import DashboardNotFoundError
+from superset.dashboards.dao import DashboardDAO
+from superset.models.dashboard import Dashboard
+from superset.utils.dict_import_export import IMPORT_EXPORT_VERSION, sanitize
+
+logger = logging.getLogger(__name__)
+
+
+# keys stored as JSON are loaded and the prefix/suffix removed
+JSON_KEYS = {"position_json": "position", "json_metadata": "metadata"}
+
+
+class ExportDashboardsCommand(BaseCommand):
+    def __init__(self, dashboard_ids: List[int]):
+        self.dashboard_ids = dashboard_ids
+
+        # this will be set when calling validate()
+        self._models: List[Dashboard] = []
+
+    @staticmethod
+    def export_dashboard(dashboard: Dashboard) -> Iterator[Tuple[str, str]]:
+        dashboard_slug = sanitize(dashboard.dashboard_title)
+        file_name = f"dashboards/{dashboard_slug}.yaml"
+
+        payload = dashboard.export_to_dict(
+            recursive=False,
+            include_parent_ref=False,
+            include_defaults=True,
+            export_uuids=True,
+        )
+        # TODO (betodealmeida): move this logic to export_to_dict once this
+        # becomes the default export endpoint
+        for key, new_name in JSON_KEYS.items():
+            if payload.get(key):
+                value = payload.pop(key)
+                try:
+                    payload[new_name] = json.loads(value)
+                except json.decoder.JSONDecodeError:
+                    logger.info("Unable to decode `%s` field: %s", key, value)
+
+        payload["version"] = IMPORT_EXPORT_VERSION
+
+        file_content = yaml.safe_dump(payload, sort_keys=False)
+        yield file_name, file_content
+
+        chart_ids = [chart.id for chart in dashboard.slices]
+        yield from ExportChartsCommand(chart_ids).run()
+
+    def run(self) -> Iterator[Tuple[str, str]]:
+        self.validate()
+
+        for dashboard in self._models:
+            yield from self.export_dashboard(dashboard)
+
+    def validate(self) -> None:
+        self._models = DashboardDAO.find_by_ids(self.dashboard_ids)
+        if len(self._models) != len(self.dashboard_ids):
+            raise DashboardNotFoundError()