Feature: PDF editor (#10318)

src-ui/src/app/components/common/pdf-editor/pdf-editor.component.ts

@@ -0,0 +1,133 @@
+import {
+  CdkDragDrop,
+  DragDropModule,
+  moveItemInArray,
+} from '@angular/cdk/drag-drop'
+import { Component, inject } from '@angular/core'
+import { FormsModule } from '@angular/forms'
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap'
+import { PDFDocumentProxy, PdfViewerModule } from 'ng2-pdf-viewer'
+import { NgxBootstrapIconsModule } from 'ngx-bootstrap-icons'
+import { DocumentService } from 'src/app/services/rest/document.service'
+import { ConfirmDialogComponent } from '../confirm-dialog/confirm-dialog.component'
+
+interface PageOperation {
+  page: number
+  rotate: number
+  splitAfter: boolean
+  selected?: boolean
+  loaded?: boolean
+}
+
+export enum PdfEditorEditMode {
+  Update = 'update',
+  Create = 'create',
+}
+
+@Component({
+  selector: 'pngx-pdf-editor',
+  templateUrl: './pdf-editor.component.html',
+  styleUrl: './pdf-editor.component.scss',
+  imports: [
+    DragDropModule,
+    FormsModule,
+    PdfViewerModule,
+    NgxBootstrapIconsModule,
+  ],
+})
+export class PDFEditorComponent extends ConfirmDialogComponent {
+  public PdfEditorEditMode = PdfEditorEditMode
+
+  private documentService = inject(DocumentService)
+  activeModal: NgbActiveModal = inject(NgbActiveModal)
+
+  documentID: number
+  pages: PageOperation[] = []
+  totalPages = 0
+  editMode: PdfEditorEditMode = PdfEditorEditMode.Create
+  deleteOriginal: boolean = false
+  includeMetadata: boolean = true
+
+  get pdfSrc(): string {
+    return this.documentService.getPreviewUrl(this.documentID)
+  }
+
+  pdfLoaded(pdf: PDFDocumentProxy) {
+    this.totalPages = pdf.numPages
+    this.pages = Array.from({ length: this.totalPages }, (_, i) => ({
+      page: i + 1,
+      rotate: 0,
+      splitAfter: false,
+      selected: false,
+      loaded: false,
+    }))
+  }
+
+  toggleSelection(i: number) {
+    this.pages[i].selected = !this.pages[i].selected
+  }
+
+  rotate(i: number) {
+    this.pages[i].rotate = (this.pages[i].rotate + 90) % 360
+  }
+
+  rotateSelected(dir: number) {
+    for (let p of this.pages) {
+      if (p.selected) {
+        p.rotate = (p.rotate + dir + 360) % 360
+      }
+    }
+  }
+
+  remove(i: number) {
+    this.pages.splice(i, 1)
+  }
+
+  toggleSplit(i: number) {
+    this.pages[i].splitAfter = !this.pages[i].splitAfter
+    if (this.pages[i].splitAfter) {
+      // force create mode
+      this.editMode = PdfEditorEditMode.Create
+    }
+  }
+
+  selectAll() {
+    this.pages.forEach((p) => (p.selected = true))
+  }
+
+  deselectAll() {
+    this.pages.forEach((p) => (p.selected = false))
+  }
+
+  deleteSelected() {
+    this.pages = this.pages.filter((p) => !p.selected)
+  }
+
+  hasSelection(): boolean {
+    return this.pages.some((p) => p.selected)
+  }
+
+  hasSplit(): boolean {
+    return this.pages.some((p) => p.splitAfter)
+  }
+
+  drop(event: CdkDragDrop<PageOperation[]>) {
+    moveItemInArray(this.pages, event.previousIndex, event.currentIndex)
+  }
+
+  getOperations() {
+    return this.pages.map((p, idx) => ({
+      page: p.page,
+      rotate: p.rotate,
+      doc: this.computeDocIndex(idx),
+    }))
+  }
+
+  private computeDocIndex(index: number): number {
+    let docIndex = 0
+    for (let i = 0; i <= index; i++) {
+      if (this.pages[i].splitAfter && i < index) docIndex++
+    }
+    return docIndex
+  }
+}