From 14d6a880c1c1382ce9a3dc79427207a3e5fc3c09 Mon Sep 17 00:00:00 2001
From: Idriss Neumann <idriss.neumann@comwork.io>
Date: Fri, 8 Dec 2023 09:48:53 +0100
Subject: [PATCH] Issue #34: add DataLinks and DataLink webcomponent

---
 src/configuration/DataLink.tsx       | 176 +++++++++++++++++++++++++++
 src/configuration/DataLinks.test.tsx |  67 ++++++++++
 src/configuration/DataLinks.tsx      |  88 ++++++++++++++
 3 files changed, 331 insertions(+)
 create mode 100644 src/configuration/DataLink.tsx
 create mode 100644 src/configuration/DataLinks.test.tsx
 create mode 100644 src/configuration/DataLinks.tsx

diff --git a/src/configuration/DataLink.tsx b/src/configuration/DataLink.tsx
new file mode 100644
index 0000000..24eeccc
--- /dev/null
+++ b/src/configuration/DataLink.tsx
@@ -0,0 +1,176 @@
+import { css } from '@emotion/css';
+import React, { Dispatch, SetStateAction, useEffect, useState } from 'react';
+import { usePrevious } from 'react-use';
+
+import { DataSourceInstanceSettings, VariableSuggestion } from '@grafana/data';
+import {
+  Button,
+  DataLinkInput,
+  InlineField,
+  InlineSwitch,
+  InlineFieldRow,
+  InlineLabel,
+  Input,
+  useStyles2
+} from '@grafana/ui';
+
+import { DataSourcePicker } from '@grafana/runtime'
+
+import { DataLinkConfig } from '../types';
+
+interface Props {
+  value: DataLinkConfig;
+  onChange: (value: DataLinkConfig) => void;
+  onDelete: () => void;
+  suggestions: VariableSuggestion[];
+  className?: string;
+}
+
+export const DataLink = (props: Props) => {
+  const { value, onChange, onDelete, suggestions, className } = props;
+  const styles = useStyles2(getStyles);
+  const [showInternalLink, setShowInternalLink] = useInternalLink(value.datasourceUid);
+
+  const handleChange = (field: keyof typeof value) => (event: React.ChangeEvent<HTMLInputElement>) => {
+    onChange({
+      ...value,
+      [field]: event.currentTarget.value,
+    });
+  };
+
+  return (
+    <div className={className}>
+      <div className={styles.firstRow}>
+        <InlineField
+          label="Field"
+          htmlFor="elasticsearch-datasource-config-field"
+          labelWidth={12}
+          tooltip={'Can be exact field name or a regex pattern that will match on the field name.'}
+        >
+          <Input
+            type="text"
+            id="elasticsearch-datasource-config-field"
+            value={value.field}
+            onChange={handleChange('field')}
+            width={100}
+          />
+        </InlineField>
+        <Button
+          variant={'destructive'}
+          title="Remove field"
+          icon="times"
+          onClick={(event) => {
+            event.preventDefault();
+            onDelete();
+          }}
+        />
+      </div>
+
+      <InlineFieldRow>
+        <div className={styles.urlField}>
+          <InlineLabel htmlFor="elasticsearch-datasource-internal-link" width={12}>
+            {showInternalLink ? 'Query' : 'URL'}
+          </InlineLabel>
+          <DataLinkInput
+            placeholder={showInternalLink ? '${__value.raw}' : 'http://example.com/${__value.raw}'}
+            value={value.url || ''}
+            onChange={(newValue) =>
+              onChange({
+                ...value,
+                url: newValue,
+              })
+            }
+            suggestions={suggestions}
+          />
+        </div>
+
+        <div className={styles.urlDisplayLabelField}>
+          <InlineField
+            label="URL Label"
+            htmlFor="elasticsearch-datasource-url-label"
+            labelWidth={14}
+            tooltip={'Use to override the button label.'}
+          >
+            <Input
+              type="text"
+              id="elasticsearch-datasource-url-label"
+              value={value.urlDisplayLabel}
+              onChange={handleChange('urlDisplayLabel')}
+            />
+          </InlineField>
+        </div>
+      </InlineFieldRow>
+
+      <div className={styles.row}>
+        <InlineField label="Internal link" labelWidth={12}>
+          <InlineSwitch
+            label="Internal link"
+            value={showInternalLink || false}
+            onChange={() => {
+              if (showInternalLink) {
+                onChange({
+                  ...value,
+                  datasourceUid: undefined,
+                });
+              }
+              setShowInternalLink(!showInternalLink);
+            }}
+          />
+        </InlineField>
+
+        {showInternalLink && (
+          <DataSourcePicker
+            tracing={true}
+            onChange={(ds: DataSourceInstanceSettings) => {
+              onChange({
+                ...value,
+                datasourceUid: ds.uid,
+              });
+            }}
+            current={value.datasourceUid}
+          />
+        )}
+      </div>
+    </div>
+  );
+};
+
+function useInternalLink(datasourceUid?: string): [boolean, Dispatch<SetStateAction<boolean>>] {
+  const [showInternalLink, setShowInternalLink] = useState<boolean>(!!datasourceUid);
+  const previousUid = usePrevious(datasourceUid);
+
+  // Force internal link visibility change if uid changed outside of this component.
+  useEffect(() => {
+    if (!previousUid && datasourceUid && !showInternalLink) {
+      setShowInternalLink(true);
+    }
+    if (previousUid && !datasourceUid && showInternalLink) {
+      setShowInternalLink(false);
+    }
+  }, [previousUid, datasourceUid, showInternalLink]);
+
+  return [showInternalLink, setShowInternalLink];
+}
+
+const getStyles = () => ({
+  firstRow: css`
+    display: flex;
+  `,
+  nameField: css`
+    flex: 2;
+  `,
+  regexField: css`
+    flex: 3;
+  `,
+  row: css`
+    display: flex;
+    align-items: baseline;
+  `,
+  urlField: css`
+    display: flex;
+    flex: 1;
+  `,
+  urlDisplayLabelField: css`
+    flex: 1;
+  `,
+});
diff --git a/src/configuration/DataLinks.test.tsx b/src/configuration/DataLinks.test.tsx
new file mode 100644
index 0000000..a623d68
--- /dev/null
+++ b/src/configuration/DataLinks.test.tsx
@@ -0,0 +1,67 @@
+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import React from 'react';
+
+import { DataLinkConfig } from '../types';
+
+import { DataLinks, Props } from './DataLinks';
+
+const setup = (propOverrides?: Partial<Props>) => {
+  const props: Props = {
+    value: [],
+    onChange: jest.fn(),
+    ...propOverrides,
+  };
+
+  return render(<DataLinks {...props} />);
+};
+
+describe('DataLinks tests', () => {
+  it('should render correctly with no fields', async () => {
+    setup();
+
+    expect(screen.getByRole('heading', { name: 'Data links' }));
+    expect(screen.getByRole('button', { name: 'Add' })).toBeInTheDocument();
+    expect(await screen.findAllByRole('button')).toHaveLength(1);
+  });
+
+  it('should render correctly when passed fields', async () => {
+    setup({ value: testValue });
+
+    expect(await screen.findAllByRole('button', { name: 'Remove field' })).toHaveLength(2);
+    expect(await screen.findAllByRole('checkbox', { name: 'Internal link' })).toHaveLength(2);
+  });
+
+  it('should call onChange to add a new field when the add button is clicked', async () => {
+    const onChangeMock = jest.fn();
+    setup({ onChange: onChangeMock });
+
+    expect(onChangeMock).not.toHaveBeenCalled();
+    const addButton = screen.getByRole('button', { name: 'Add' });
+    await userEvent.click(addButton);
+
+    expect(onChangeMock).toHaveBeenCalled();
+  });
+
+  it('should call onChange to remove a field when the remove button is clicked', async () => {
+    const onChangeMock = jest.fn();
+    setup({ value: testValue, onChange: onChangeMock });
+
+    expect(onChangeMock).not.toHaveBeenCalled();
+    const removeButton = await screen.findAllByRole('button', { name: 'Remove field' });
+    await userEvent.click(removeButton[0]);
+
+    expect(onChangeMock).toHaveBeenCalled();
+  });
+});
+
+const testValue: DataLinkConfig[] = [
+  {
+    field: 'regex1',
+    url: 'localhost1',
+  },
+  {
+    field: 'regex2',
+    url: 'localhost2',
+  },
+];
diff --git a/src/configuration/DataLinks.tsx b/src/configuration/DataLinks.tsx
new file mode 100644
index 0000000..2ece07a
--- /dev/null
+++ b/src/configuration/DataLinks.tsx
@@ -0,0 +1,88 @@
+import { css } from '@emotion/css';
+import React from 'react';
+
+import { GrafanaTheme2, VariableOrigin, DataLinkBuiltInVars } from '@grafana/data';
+import { ConfigSubSection } from '@grafana/experimental';
+import { Button, useStyles2 } from '@grafana/ui';
+
+import { DataLinkConfig } from '../types';
+
+import { DataLink } from './DataLink';
+
+const getStyles = (theme: GrafanaTheme2) => {
+  return {
+    addButton: css`
+      margin-right: 10px;
+    `,
+    container: css`
+      margin-bottom: ${theme.spacing(2)};
+    `,
+    dataLink: css`
+      margin-bottom: ${theme.spacing(1)};
+    `,
+  };
+};
+
+export type Props = {
+  value?: DataLinkConfig[];
+  onChange: (value: DataLinkConfig[]) => void;
+};
+export const DataLinks = (props: Props) => {
+  const { value, onChange } = props;
+  const styles = useStyles2(getStyles);
+
+  return (
+    <ConfigSubSection
+      title="Data links"
+      description="Add links to existing fields. Links will be shown in log row details next to the field value."
+    >
+      <div className={styles.container}>
+        {value && value.length > 0 && (
+          <div className="gf-form-group">
+            {value.map((field, index) => {
+              return (
+                <DataLink
+                  className={styles.dataLink}
+                  key={index}
+                  value={field}
+                  onChange={(newField) => {
+                    const newDataLinks = [...value];
+                    newDataLinks.splice(index, 1, newField);
+                    onChange(newDataLinks);
+                  }}
+                  onDelete={() => {
+                    const newDataLinks = [...value];
+                    newDataLinks.splice(index, 1);
+                    onChange(newDataLinks);
+                  }}
+                  suggestions={[
+                    {
+                      value: DataLinkBuiltInVars.valueRaw,
+                      label: 'Raw value',
+                      documentation: 'Raw value of the field',
+                      origin: VariableOrigin.Value,
+                    },
+                  ]}
+                />
+              );
+            })}
+          </div>
+        )}
+
+        <Button
+          type="button"
+          variant={'secondary'}
+          className={styles.addButton}
+          icon="plus"
+          onClick={(event) => {
+            event.preventDefault();
+            const newDataLinks = [...(value || []), { field: '', url: '' }];
+            onChange(newDataLinks);
+          }}
+        >
+          Add
+        </Button>
+      </div>
+    </ConfigSubSection>
+  );
+};