From 167ef72bb6ea5bdeec5bd55eccd7f7d912142c94 Mon Sep 17 00:00:00 2001
From: Maximilian Krambach <maximilian.krambach@intevation.de>
Date: Fri, 25 Jan 2019 15:36:02 +0100
Subject: [PATCH] agenda pdf export

---
 .../app/core/services/pdf-document.service.ts |   8 ++
 .../agenda-list/agenda-list.component.html    |   7 ++
 .../agenda-list/agenda-list.component.ts      |  17 ++-
 .../src/app/site/agenda/models/view-item.ts   |   5 +-
 .../services/agenda-pdf.service.spec.ts       |  17 +++
 .../agenda/services/agenda-pdf.service.ts     | 103 ++++++++++++++++++
 6 files changed, 152 insertions(+), 5 deletions(-)
 create mode 100644 client/src/app/site/agenda/services/agenda-pdf.service.spec.ts
 create mode 100644 client/src/app/site/agenda/services/agenda-pdf.service.ts

diff --git a/client/src/app/core/services/pdf-document.service.ts b/client/src/app/core/services/pdf-document.service.ts
index a2ca65bb2..a195f7248 100644
--- a/client/src/app/core/services/pdf-document.service.ts
+++ b/client/src/app/core/services/pdf-document.service.ts
@@ -468,6 +468,14 @@ export class PdfDocumentService {
             tableHeader: {
                 bold: true,
                 fillColor: 'white'
+            },
+            listParent: {
+                fontSize: 14,
+                margin: [0, 5]
+            },
+            listChild: {
+                fontSize: 12,
+                margin: [0, 5]
             }
         };
     }
diff --git a/client/src/app/site/agenda/components/agenda-list/agenda-list.component.html b/client/src/app/site/agenda/components/agenda-list/agenda-list.component.html
index 172eab33d..7b02282b2 100644
--- a/client/src/app/site/agenda/components/agenda-list/agenda-list.component.html
+++ b/client/src/app/site/agenda/components/agenda-list/agenda-list.component.html
@@ -110,10 +110,17 @@
                 <span translate>Sort</span>
             </button>
         </div>
+        <!-- csv export -->
         <button mat-menu-item (click)="csvExportItemList()">
             <mat-icon>archive</mat-icon>
             <span translate>Export as CSV</span>
         </button>
+        <!-- PDF export -->
+        <button mat-menu-item (click)="onDownloadPdf()">
+            <mat-icon>picture_as_pdf</mat-icon>
+            <span translate>Export as PDF</span>
+        </button>
+        <!-- Import -->
         <button mat-menu-item *osPerms="'agenda.can_manage'" routerLink="import">
             <mat-icon>save_alt</mat-icon>
             <span translate>Import</span><span>&nbsp;...</span>
diff --git a/client/src/app/site/agenda/components/agenda-list/agenda-list.component.ts b/client/src/app/site/agenda/components/agenda-list/agenda-list.component.ts
index 5aafa8a6d..451083400 100644
--- a/client/src/app/site/agenda/components/agenda-list/agenda-list.component.ts
+++ b/client/src/app/site/agenda/components/agenda-list/agenda-list.component.ts
@@ -11,9 +11,11 @@ import { PromptService } from '../../../../core/services/prompt.service';
 import { ViewItem } from '../../models/view-item';
 
 import { AgendaCsvExportService } from '../../services/agenda-csv-export.service';
+import { AgendaPdfService } from '../../services/agenda-pdf.service';
 import { ConfigService } from 'app/core/services/config.service';
 import { DurationService } from 'app/core/services/duration.service';
 import { ItemInfoDialogComponent } from '../item-info-dialog/item-info-dialog.component';
+import { PdfDocumentService } from 'app/core/services/pdf-document.service';
 import { ViewportService } from 'app/core/services/viewport.service';
 
 /**
@@ -52,6 +54,8 @@ export class AgendaListComponent extends ListViewBaseComponent<ViewItem> impleme
      * @param durationService Converts numbers to readable duration strings
      * @param csvExport Handles the exporting into csv
      * @param filterService: service for filtering data
+     * @param agendaPdfService: service for preparing a pdf of the agenda
+     * @param pdfService: Service for exporting a pdf
      */
     public constructor(
         titleService: Title,
@@ -66,7 +70,9 @@ export class AgendaListComponent extends ListViewBaseComponent<ViewItem> impleme
         public vp: ViewportService,
         public durationService: DurationService,
         private csvExport: AgendaCsvExportService,
-        public filterService: AgendaFilterListService
+        public filterService: AgendaFilterListService,
+        private agendaPdfService: AgendaPdfService,
+        private pdfService: PdfDocumentService
     ) {
         super(titleService, translate, matSnackBar);
 
@@ -227,4 +233,13 @@ export class AgendaListComponent extends ListViewBaseComponent<ViewItem> impleme
     public csvExportItemList(): void {
         this.csvExport.exportItemList(this.dataSource.filteredData);
     }
+
+    /**
+     * Triggers the export of the agenda. Currently filtered items and 'hidden'
+     * items will not be exported
+     */
+    public onDownloadPdf(): void {
+        const filename = this.translate.instant('Agenda');
+        this.pdfService.download(this.agendaPdfService.agendaListToDocDef(this.dataSource.filteredData), filename);
+    }
 }
diff --git a/client/src/app/site/agenda/models/view-item.ts b/client/src/app/site/agenda/models/view-item.ts
index 332a6aa19..5919c1801 100644
--- a/client/src/app/site/agenda/models/view-item.ts
+++ b/client/src/app/site/agenda/models/view-item.ts
@@ -67,10 +67,7 @@ export class ViewItem extends BaseViewModel {
     }
 
     public get verboseCsvType(): string {
-        if (this.item) {
-            return this.item.verboseCsvType;
-        }
-        return '';
+        return this.item ? this.item.verboseCsvType : '';
     }
 
     /**
diff --git a/client/src/app/site/agenda/services/agenda-pdf.service.spec.ts b/client/src/app/site/agenda/services/agenda-pdf.service.spec.ts
new file mode 100644
index 000000000..30c42bb76
--- /dev/null
+++ b/client/src/app/site/agenda/services/agenda-pdf.service.spec.ts
@@ -0,0 +1,17 @@
+import { TestBed } from '@angular/core/testing';
+
+import { AgendaPdfService } from './agenda-pdf.service';
+import { E2EImportsModule } from 'e2e-imports.module';
+
+describe('AgendaPdfService', () => {
+    beforeEach(() =>
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        })
+    );
+
+    it('should be created', () => {
+        const service: AgendaPdfService = TestBed.get(AgendaPdfService);
+        expect(service).toBeTruthy();
+    });
+});
diff --git a/client/src/app/site/agenda/services/agenda-pdf.service.ts b/client/src/app/site/agenda/services/agenda-pdf.service.ts
new file mode 100644
index 000000000..b1fc5e57c
--- /dev/null
+++ b/client/src/app/site/agenda/services/agenda-pdf.service.ts
@@ -0,0 +1,103 @@
+import { Injectable } from '@angular/core';
+
+import { TranslateService } from '@ngx-translate/core';
+
+import { TreeService, OSTreeNode } from 'app/core/services/tree.service';
+import { ViewItem } from '../models/view-item';
+
+/**
+ * pdfMake structure for a content line in the pdf document.
+ */
+interface AgendaTreePdfEntry {
+    style: string;
+    columns: { width?: number; text: string }[];
+}
+
+/**
+ * Converts a list of agenda items to pdf, indenting according to a hierarchy tree.
+ * Provides the public method `agendaListToDocDef(items: ViewItems[])` which should be convenient to use.
+ *
+ * @example
+ * ```ts
+ * const pdfMakeCompatibleDocDef = this.AgendaPdfService.agendaListToDocDef(this.dataSource.data);
+ * ```
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class AgendaPdfService {
+    /**
+     * Constructor
+     *
+     * @param translate handle translations
+     * @param treeService create hierarchy between items
+     */
+    public constructor(private translate: TranslateService, private treeService: TreeService) {}
+
+    /**
+     * Creates pdfMake definitions for a agenda list pdf from the given agenda items
+     *
+     * @param items A list of viewItems to be included in this agenda list. Items with the property 'hidden'
+     * will be ignored, all other items will be sorted by their parents and weight
+     * @returns definitions ready to be opened or exported via {@link PdfDocumentService}
+     */
+    public agendaListToDocDef(items: ViewItem[]): object {
+        const tree: OSTreeNode<ViewItem>[] = this.treeService.makeTree(items, 'weight', 'parent_id');
+        const title = {
+            text: this.translate.instant('Agenda'),
+            style: 'title'
+        };
+        const entries = this.createEntries(tree);
+        return [title, entries];
+    }
+
+    /**
+     * Traverses the given nodeTree and creates an array of entries for all items
+     *
+     * @param tree
+     * @returns hierarchical pdfMake definitions for topic entries
+     */
+    private createEntries(tree: OSTreeNode<ViewItem>[]): AgendaTreePdfEntry[] {
+        const content: AgendaTreePdfEntry[] = [];
+        tree.forEach(treeitem => content.push(...this.parseItem(treeitem, 0)));
+        return content;
+    }
+
+    /**
+     * Parses an entry line and triggers parsing of any children
+     * (TODO: Check assumption: items with 'is_hidden' are not to be exported)
+     *
+     * @param nodeItem the item for the head line
+     * @param level: The hierarchy index (beginning at 0 for top level agenda topics)
+     * @returns pdfMake definitions for the number/title strings, indented according to hierarchy
+     */
+    private parseItem(nodeItem: OSTreeNode<ViewItem>, level: number): AgendaTreePdfEntry[] {
+        const itemList: AgendaTreePdfEntry[] = [];
+        if (!nodeItem.item.item.is_hidden) {
+            // don't include hidden items and their subitems
+            const resultString: AgendaTreePdfEntry = {
+                style: level ? 'listChild' : 'listParent',
+                columns: [
+                    {
+                        width: level * 15,
+                        text: ''
+                    },
+                    {
+                        width: 60,
+                        text: nodeItem.item.itemNumber
+                    },
+                    {
+                        text: nodeItem.item.getTitle()
+                    }
+                ]
+            };
+            itemList.push(resultString);
+            if (nodeItem.children && nodeItem.children.length) {
+                nodeItem.children.forEach(child => {
+                    itemList.push(...this.parseItem(child, level + 1));
+                });
+            }
+        }
+        return itemList;
+    }
+}