scottyaslan commented on code in PR #10473: URL: https://github.com/apache/nifi/pull/10473#discussion_r2479337057
########## nifi-frontend/src/main/frontend/apps/nifi/src/app/pages/flow-designer/ui/canvas/items/flow/flow-diff-dialog/flow-diff-dialog.ts: ########## @@ -0,0 +1,298 @@ +/* + * 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. + */ + +import { + AfterViewInit, + Component, + DestroyRef, + ViewChild, + inject +} from '@angular/core'; +import { MAT_DIALOG_DATA, MatDialogModule } from '@angular/material/dialog'; +import { MatTableDataSource, MatTableModule } from '@angular/material/table'; +import { MatSort, MatSortModule } from '@angular/material/sort'; +import { FormBuilder, FormControl, FormGroup, ReactiveFormsModule } from '@angular/forms'; +import { CommonModule } from '@angular/common'; +import { MatFormField, MatLabel } from '@angular/material/form-field'; +import { MatSelectModule } from '@angular/material/select'; +import { MatOption } from '@angular/material/core'; +import { MatInput } from '@angular/material/input'; +import { MatButton } from '@angular/material/button'; +import { MatProgressSpinner } from '@angular/material/progress-spinner'; +import { combineLatest, of } from 'rxjs'; +import { catchError, debounceTime, distinctUntilChanged, filter, map, startWith, switchMap, take } from 'rxjs/operators'; +import { FlowComparisonEntity, VersionControlInformation } from '../../../../../state/flow'; +import { VersionedFlowSnapshotMetadata } from '../../../../../../../state/shared'; +import { RegistryService } from '../../../../../service/registry.service'; +import { CloseOnEscapeDialog, NiFiCommon } from '@nifi/shared'; +import { takeUntilDestroyed } from '@angular/core/rxjs-interop'; +import { Store } from '@ngrx/store'; +import { CanvasState } from '../../../../../state'; +import { selectTimeOffset } from '../../../../../../../state/flow-configuration/flow-configuration.selectors'; + +export interface FlowDiffDialogData { + versionControlInformation: VersionControlInformation; + versions: VersionedFlowSnapshotMetadata[]; + currentVersion: string; + selectedVersion: string; +} + +interface FlowDiffRow { + componentName: string; + changeType: string; + difference: string; +} + +@Component({ + selector: 'flow-diff-dialog', + standalone: true, + imports: [ + CommonModule, + MatDialogModule, + MatTableModule, + MatSortModule, + ReactiveFormsModule, + MatFormField, + MatLabel, + MatSelectModule, + MatOption, + MatInput, + MatButton, + MatProgressSpinner + ], + templateUrl: './flow-diff-dialog.html', + styleUrl: './flow-diff-dialog.scss' +}) +export class FlowDiffDialog extends CloseOnEscapeDialog implements AfterViewInit { + private data = inject<FlowDiffDialogData>(MAT_DIALOG_DATA); + private registryService = inject(RegistryService); + private destroyRef = inject(DestroyRef); + private formBuilder = inject(FormBuilder); + private nifiCommon = inject(NiFiCommon); + private store = inject<Store<CanvasState>>(Store); + private timeOffset = this.store.selectSignal(selectTimeOffset); + + @ViewChild(MatSort) + set matSort(sort: MatSort | undefined) { + if (sort) { + this.dataSource.sort = sort; + } + } + + displayedColumns: string[] = ['componentName', 'changeType', 'difference']; + dataSource: MatTableDataSource<FlowDiffRow> = new MatTableDataSource<FlowDiffRow>(); + comparisonForm: FormGroup; + filterControl: FormControl<string> = new FormControl<string>('', { nonNullable: true }); + currentVersionControl: FormControl<string>; + selectedVersionControl: FormControl<string>; + + versionOptions: string[]; + flowName: string; + comparisonSummary: { version: string; created?: string }[] = []; + isLoading = false; + errorMessage: string | null = null; + noDifferences = false; + private versionMetadataByVersion: Map<string, VersionedFlowSnapshotMetadata> = new Map(); + + constructor() { + super(); + const versions = this.sortVersions(this.data.versions); + this.versionOptions = versions.map((version) => version.version); + this.versionMetadataByVersion = new Map(versions.map((metadata) => [metadata.version, metadata])); + const vci = this.data.versionControlInformation; + this.flowName = vci.flowName || vci.flowId; + + this.currentVersionControl = new FormControl<string>(this.data.currentVersion, { nonNullable: true }); + this.selectedVersionControl = new FormControl<string>(this.data.selectedVersion, { nonNullable: true }); + this.comparisonForm = this.formBuilder.group({ + currentVersion: this.currentVersionControl, + selectedVersion: this.selectedVersionControl + }); + + this.dataSource.filterPredicate = (row: FlowDiffRow, filterTerm: string) => { + if (!filterTerm) { + return true; + } + + const normalizedFilter = filterTerm.toLowerCase(); + return ( + (row.componentName || '').toLowerCase().includes(normalizedFilter) || + (row.changeType || '').toLowerCase().includes(normalizedFilter) || + (row.difference || '').toLowerCase().includes(normalizedFilter) + ); + }; + + this.dataSource.sortingDataAccessor = (row: FlowDiffRow, property: string) => { + switch (property) { + case 'componentName': + return (row.componentName || '').toLowerCase(); + case 'changeType': + return (row.changeType || '').toLowerCase(); + case 'difference': + return (row.difference || '').toLowerCase(); + default: + return ''; + } + }; + + this.configureFiltering(); + this.configureComparisonChanges(); + this.setComparisonSummary(this.data.currentVersion, this.data.selectedVersion); + } + + formatVersionOption(version: string): string { + const metadata = this.versionMetadataByVersion.get(version); + const formattedVersion = + version.length > 5 ? `${version.substring(0, 5)}...` : version; + const created = metadata ? this.formatTimestamp(metadata) : undefined; + return created ? `${formattedVersion} (${created})` : formattedVersion; + } + + ngAfterViewInit(): void { + // Sorting handled automatically when MatSort is available via the ViewChild setter + } + + private configureFiltering(): void { + this.filterControl.valueChanges + .pipe( + startWith(this.filterControl.value), + debounceTime(200), + takeUntilDestroyed(this.destroyRef) + ) + .subscribe((value) => { + const filterTerm = value ? value.trim() : ''; + this.dataSource.filter = filterTerm.toLowerCase(); + }); + } + + private configureComparisonChanges(): void { + const currentVersion$ = this.currentVersionControl.valueChanges.pipe(startWith(this.currentVersionControl.value)); + const selectedVersion$ = this.selectedVersionControl.valueChanges.pipe( + startWith(this.selectedVersionControl.value) + ); + + combineLatest([currentVersion$, selectedVersion$]) + .pipe( + takeUntilDestroyed(this.destroyRef), + map(([current, selected]) => [current, selected] as [string | null, string | null]), + filter(([current, selected]) => !!current && !!selected), + distinctUntilChanged( + ([currentA, selectedA], [currentB, selectedB]) => + currentA === currentB && selectedA === selectedB + ), + switchMap(([current, selected]) => { + this.isLoading = true; + this.errorMessage = null; + this.noDifferences = false; + return this.fetchFlowDiff(current as string, selected as string).pipe( + catchError((error) => { + this.isLoading = false; + this.errorMessage = 'Unable to retrieve version differences.'; + console.error('Failed to load flow version diff', error); + this.dataSource.data = []; + this.noDifferences = true; + return of(null); + }) + ); + }) + ) + .subscribe((comparison) => { + if (!comparison) { + return; + } + + this.isLoading = false; + this.setComparisonSummary(this.currentVersionControl.value, this.selectedVersionControl.value); + const rows = this.toRows(comparison); + this.dataSource.data = rows; + this.noDifferences = rows.length === 0; + }); + } + + private fetchFlowDiff(versionA: string, versionB: string) { + this.setComparisonSummary(versionA, versionB); + const vci = this.data.versionControlInformation; + const branch = vci.branch ?? null; + + return this.registryService + .getFlowDiff(vci.registryId, vci.bucketId, vci.flowId, versionA, versionB, branch) + .pipe(take(1)); + } + + private sortVersions(versions: VersionedFlowSnapshotMetadata[]): VersionedFlowSnapshotMetadata[] { + return versions + .slice() + .sort((a, b) => { + const timestampA = this.nifiCommon.isDefinedAndNotNull(a.timestamp) ? a.timestamp : 0; + const timestampB = this.nifiCommon.isDefinedAndNotNull(b.timestamp) ? b.timestamp : 0; + const timestampComparison = this.nifiCommon.compareNumber(timestampB, timestampA); + if (timestampComparison !== 0) { + return timestampComparison; + } + + if (this.nifiCommon.isNumber(a.version) && this.nifiCommon.isNumber(b.version)) { + return this.nifiCommon.compareNumber(parseInt(b.version, 10), parseInt(a.version, 10)); + } + + return this.nifiCommon.compareString(b.version, a.version); + }); + } + + private toRows(comparison: FlowComparisonEntity): FlowDiffRow[] { + if (!comparison || !comparison.componentDifferences) { + return []; + } + + const rows: FlowDiffRow[] = []; + comparison.componentDifferences.forEach((component) => { + component.differences.forEach((difference) => { + rows.push({ + componentName: component.componentName || '', + changeType: difference.differenceType, + difference: difference.difference + }); + }); + }); + + return rows; + } + + private setComparisonSummary(versionA: string, versionB: string): void { + this.comparisonSummary = [versionA, versionB].map((version) => { + const metadata = this.versionMetadataByVersion.get(version); + return { + version, + created: metadata ? this.formatTimestamp(metadata) : undefined + }; + }); + } + + private formatTimestamp(metadata: VersionedFlowSnapshotMetadata): string | undefined { + if (!metadata.timestamp) { + return undefined; + } + + const now = new Date(); + const userOffset = now.getTimezoneOffset() * 60 * 1000; + const date = new Date(metadata.timestamp + userOffset + this.getTimezoneOffset()); + return this.nifiCommon.formatDateTime(date); + } + + private getTimezoneOffset(): number { + return this.timeOffset() || 0; + } Review Comment: IMO we can just leave the timestamp unformatted. -- This is an automated message from the Apache Git Service. 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