Scenes: Show transformations when editing scene dashboard (#80372)

* Make dashboard data source query actually use DashboardDataSource

* remove commented out bit

* Always wrap SceneQueryRunner with SceneDataTransformer

* Update Dashboard model compat wrapper tests

* DashboardQueryEditor test

* VizPanelManager tests update

* transform save model to scene tests update

* Betterer

* PanelMenuBehavior test update

* Few more bits

* Prettier

* Show transformations when editing scene dashboard

* remove and edit transformations works

* add add and remove buttons

* Change styles to object to fix betterer issue

* Revert "Change styles to object to fix betterer issue"

This reverts commit 8627b9162c.

* Fix the correct file...

* Some refactoring

* remove unneessary if statement

* panel data not present on first render

* move transformation tabs out of folder

* fix tests

* add lint exception

* refactor tab component

* Fix merge issue

* reorder components

---------

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

public/app/features/dashboard-scene/panel-edit/PanelDataPane/EmptyTransformationsMessage.tsx

@@ -0,0 +1,37 @@
+import React from 'react';
+
+import { selectors } from '@grafana/e2e-selectors';
+import { Box, Button, Stack, Text } from '@grafana/ui';
+import { Trans } from 'app/core/internationalization';
+
+interface EmptyTransformationsProps {
+  onShowPicker: () => void;
+}
+export function EmptyTransformationsMessage(props: EmptyTransformationsProps) {
+  return (
+    <Box alignItems="center" padding={4}>
+      <Stack direction="column" alignItems="center" gap={2}>
+        <Text element="h3" textAlignment="center">
+          <Trans key="transformations.empty.add-transformation-header">Start transforming data</Trans>
+        </Text>
+        <Text element="p" textAlignment="center" data-testid={selectors.components.Transforms.noTransformationsMessage}>
+          <Trans key="transformations.empty.add-transformation-body">
+            Transformations allow data to be changed in various ways before your visualization is shown.
+            <br />
+            This includes joining data together, renaming fields, making calculations, formatting data for display, and
+            more.
+          </Trans>
+        </Text>
+        <Button
+          icon="plus"
+          variant="primary"
+          size="md"
+          onClick={props.onShowPicker}
+          data-testid={selectors.components.Transforms.addTransformationButton}
+        >
+          Add transformation
+        </Button>
+      </Stack>
+    </Box>
+  );
+}

public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataPane.tsx

@@ -11,7 +11,7 @@ import {
   SceneObjectUrlValues,
   VizPanel,
 } from '@grafana/scenes';
-import { Tab, TabContent, TabsBar, useStyles2 } from '@grafana/ui';
+import { Container, CustomScrollbar, Tab, TabContent, TabsBar, useStyles2 } from '@grafana/ui';
 import { shouldShowAlertingTab } from 'app/features/dashboard/components/PanelEditor/state/selectors';
 
 import { VizPanelManager } from '../VizPanelManager';
@@ -158,7 +158,11 @@ function PanelDataPaneRendered({ model }: SceneComponentProps<PanelDataPane>) {
           );
         })}
       </TabsBar>
-      <TabContent className={styles.tabContent}>{currentTab && <currentTab.Component model={currentTab} />}</TabContent>
+      <TabContent className={styles.tabContent}>
+        <CustomScrollbar autoHeightMin="100%">
+          <Container>{currentTab && <currentTab.Component model={currentTab} />}</Container>
+        </CustomScrollbar>
+      </TabContent>
     </div>
   );
 }

public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataTransformationsTab.test.tsx

@@ -0,0 +1,54 @@
+import { render, screen } from '@testing-library/react';
+import React from 'react';
+
+import { FieldType, LoadingState, TimeRange, standardTransformersRegistry, toDataFrame } from '@grafana/data';
+import { selectors } from '@grafana/e2e-selectors';
+import { SceneDataTransformer } from '@grafana/scenes';
+import { getStandardTransformers } from 'app/features/transformers/standardTransformers';
+
+import { PanelDataTransformationsTab, PanelDataTransformationsTabRendered } from './PanelDataTransformationsTab';
+
+function createPanelManagerMock(sceneDataTransformer: SceneDataTransformer) {
+  return {
+    getDataTransformer: () => sceneDataTransformer,
+  } as unknown as PanelDataTransformationsTab;
+}
+
+describe('PanelDataTransformationsTab', () => {
+  it('renders empty message when there are no transformations', async () => {
+    const modelMock = createPanelManagerMock(new SceneDataTransformer({ transformations: [] }));
+    render(<PanelDataTransformationsTabRendered model={modelMock}></PanelDataTransformationsTabRendered>);
+
+    await screen.findByTestId(selectors.components.Transforms.noTransformationsMessage);
+  });
+
+  it('renders transformations when there are transformations', async () => {
+    standardTransformersRegistry.setInit(getStandardTransformers);
+    const modelMock = createPanelManagerMock(
+      new SceneDataTransformer({
+        data: {
+          timeRange: {} as unknown as TimeRange,
+          state: {} as unknown as LoadingState,
+          series: [
+            toDataFrame({
+              name: 'A',
+              fields: [
+                { name: 'time', type: FieldType.time, values: [100, 200, 300] },
+                { name: 'values', type: FieldType.number, values: [1, 2, 3] },
+              ],
+            }),
+          ],
+        },
+        transformations: [
+          {
+            id: 'calculateField',
+            options: {},
+          },
+        ],
+      })
+    );
+    render(<PanelDataTransformationsTabRendered model={modelMock}></PanelDataTransformationsTabRendered>);
+
+    await screen.findByText('1 - Add field from calculation');
+  });
+});

public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataTransformationsTab.tsx

@@ -1,10 +1,16 @@
+import { css } from '@emotion/css';
 import React from 'react';
+import { DragDropContext, Droppable } from 'react-beautiful-dnd';
 
-import { IconName } from '@grafana/data';
-import { SceneObjectBase, SceneComponentProps } from '@grafana/scenes';
+import { DataTransformerConfig, GrafanaTheme2, IconName, PanelData } from '@grafana/data';
+import { selectors } from '@grafana/e2e-selectors';
+import { SceneObjectBase, SceneComponentProps, SceneDataTransformer } from '@grafana/scenes';
+import { Button, ButtonGroup, ConfirmModal, useStyles2 } from '@grafana/ui';
+import { TransformationOperationRows } from 'app/features/dashboard/components/TransformationsEditor/TransformationOperationRows';
 
 import { VizPanelManager } from '../VizPanelManager';
 
+import { EmptyTransformationsMessage } from './EmptyTransformationsMessage';
 import { PanelDataPaneTabState, PanelDataPaneTab } from './types';
 
 interface PanelDataTransformationsTabState extends PanelDataPaneTabState {}
@@ -23,7 +29,7 @@ export class PanelDataTransformationsTab
   }
 
   getItemsCount() {
-    return 0;
+    return this.getDataTransformer().state.transformations.length;
   }
 
   constructor(panelManager: VizPanelManager) {
@@ -32,15 +38,104 @@ export class PanelDataTransformationsTab
     this._panelManager = panelManager;
   }
 
-  get panelManager() {
-    return this._panelManager;
+  public getDataTransformer(): SceneDataTransformer {
+    const provider = this._panelManager.state.panel.state.$data;
+    if (!provider || !(provider instanceof SceneDataTransformer)) {
+      throw new Error('Could not find SceneDataTransformer for panel');
+    }
+
+    return provider;
+  }
+
+  public changeTransformations(transformations: DataTransformerConfig[]) {
+    const dataProvider = this.getDataTransformer();
+    dataProvider.setState({ transformations });
+    dataProvider.reprocessTransformations();
   }
 }
 
-function PanelDataTransformationsTabRendered({ model }: SceneComponentProps<PanelDataTransformationsTab>) {
-  // const { dataRef } = model.useState();
-  // const dataObj = dataRef.resolve();
-  // // const { transformations } = dataObj.useState();
+export function PanelDataTransformationsTabRendered({ model }: SceneComponentProps<PanelDataTransformationsTab>) {
+  const styles = useStyles2(getStyles);
+  const { data, transformations: transformsWrongType } = model.getDataTransformer().useState();
+  // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
+  const transformations: DataTransformerConfig[] = transformsWrongType as unknown as DataTransformerConfig[];
 
-  return <div>TODO Transformations</div>;
+  if (transformations.length < 1) {
+    return <EmptyTransformationsMessage onShowPicker={() => {}}></EmptyTransformationsMessage>;
+  }
+
+  if (!data) {
+    return;
+  }
+
+  return (
+    <>
+      <TransformationsEditor data={data} transformations={transformations} model={model} />
+      <ButtonGroup>
+        <Button
+          icon="plus"
+          variant="secondary"
+          onClick={() => {}}
+          data-testid={selectors.components.Transforms.addTransformationButton}
+        >
+          Add another transformation
+        </Button>
+        <Button className={styles.removeAll} icon="times" variant="secondary" onClick={() => {}}>
+          Delete all transformations
+        </Button>
+      </ButtonGroup>
+      <ConfirmModal
+        isOpen={false}
+        title="Delete all transformations?"
+        body="By deleting all transformations, you will go back to the main selection screen."
+        confirmText="Delete all"
+        onConfirm={() => {}}
+        onDismiss={() => {}}
+      />
+    </>
+  );
 }
+
+interface TransformationEditorProps {
+  transformations: DataTransformerConfig[];
+  model: PanelDataTransformationsTab;
+  data: PanelData;
+}
+
+function TransformationsEditor({ transformations, model, data }: TransformationEditorProps) {
+  const transformationEditorRows = transformations.map((t, i) => ({ id: `${i} - ${t.id}`, transformation: t }));
+
+  return (
+    <DragDropContext onDragEnd={() => {}}>
+      <Droppable droppableId="transformations-list" direction="vertical">
+        {(provided) => {
+          return (
+            <div ref={provided.innerRef} {...provided.droppableProps}>
+              <TransformationOperationRows
+                onChange={(index, transformation) => {
+                  const newTransformations = transformations.slice();
+                  newTransformations[index] = transformation;
+                  model.changeTransformations(newTransformations);
+                }}
+                onRemove={(index) => {
+                  const newTransformations = transformations.slice();
+                  newTransformations.splice(index);
+                  model.changeTransformations(newTransformations);
+                }}
+                configs={transformationEditorRows}
+                data={data}
+              ></TransformationOperationRows>
+              {provided.placeholder}
+            </div>
+          );
+        }}
+      </Droppable>
+    </DragDropContext>
+  );
+}
+
+const getStyles = (theme: GrafanaTheme2) => ({
+  removeAll: css({
+    marginLeft: theme.spacing(2),
+  }),
+});

public/app/features/dashboard/components/TransformationsEditor/TransformationsEditor.tsx

@@ -21,12 +21,9 @@ import {
   withTheme,
   IconButton,
   ButtonGroup,
-  Box,
-  Text,
-  Stack,
 } from '@grafana/ui';
 import config from 'app/core/config';
-import { Trans } from 'app/core/internationalization';
+import { EmptyTransformationsMessage } from 'app/features/dashboard-scene/panel-edit/PanelDataPane/EmptyTransformationsMessage';
 
 import { PanelModel } from '../../state';
 import { PanelNotSupported } from '../PanelEditor/PanelNotSupported';
@@ -258,36 +255,11 @@ class UnThemedTransformationsEditor extends React.PureComponent<TransformationsE
 
   renderEmptyMessage = () => {
     return (
-      <Box alignItems="center" padding={4}>
-        <Stack direction="column" alignItems="center" gap={2}>
-          <Text element="h3" textAlignment="center">
-            <Trans key="transformations.empty.add-transformation-header">Start transforming data</Trans>
-          </Text>
-          <Text
-            element="p"
-            textAlignment="center"
-            data-testid={selectors.components.Transforms.noTransformationsMessage}
-          >
-            <Trans key="transformations.empty.add-transformation-body">
-              Transformations allow data to be changed in various ways before your visualization is shown.
-              <br />
-              This includes joining data together, renaming fields, making calculations, formatting data for display,
-              and more.
-            </Trans>
-          </Text>
-          <Button
-            icon="plus"
-            variant="primary"
-            size="md"
-            onClick={() => {
-              this.setState({ showPicker: true });
-            }}
-            data-testid={selectors.components.Transforms.addTransformationButton}
-          >
-            Add transformation
-          </Button>
-        </Stack>
-      </Box>
+      <EmptyTransformationsMessage
+        onShowPicker={() => {
+          this.setState({ showPicker: true });
+        }}
+      ></EmptyTransformationsMessage>
     );
   };