Add offline cachine for file group elements and contents (not files, though)

src/app/components/editor/database/database.component.html

@@ -1,4 +1,4 @@
-<div class="database-wrapper">
+<div class="database-wrapper" *ngIf="!notAvailableOffline">
   <ion-toolbar>
     <ion-input
             [readonly]="readonly"
@@ -25,3 +25,7 @@
     ></ag-grid-angular>
   </div>
 </div>
+
+<div class="database-wrapper not-available" *ngIf="notAvailableOffline">
+  Sorry, this database is not available offline yet.
+</div>

src/app/components/editor/database/database.component.scss

@@ -1,4 +1,11 @@
 div.database-wrapper {
   border: 2px solid #8c8c8c;
   border-radius: 3px;
+
+  &.not-available {
+    height: 600px;
+    text-align: center;
+    padding-top: 100px;
+    color: #494949;
+  }
 }

src/app/components/editor/files/files.component.html

@@ -1,4 +1,4 @@
-<div class="files-wrapper">
+<div class="files-wrapper" *ngIf="!notAvailableOffline">
     <div class="new-uploads" style="margin: 20px;" *ngIf="!readonly">
         <form #uploadForm [action]="getApiSubmit()" enctype="multipart/form-data" method="post">
             <input style="margin-top: 10px;" type="file" id="file" name="uploaded_file">
@@ -21,3 +21,6 @@
         </ion-grid>
     </div>
 </div>
+<div class="files-wrapper not-available" *ngIf="notAvailableOffline">
+    Sorry, this file group is not available offline yet.
+</div>

src/app/components/editor/files/files.component.scss

@@ -2,4 +2,11 @@ div.files-wrapper {
   border: 2px solid #8c8c8c;
   border-radius: 3px;
   margin-top: 15px;
+
+  &.not-available {
+    height: 150px;
+    text-align: center;
+    padding-top: 40px;
+    color: #494949;
+  }
 }

src/app/components/editor/files/files.component.ts

@@ -1,8 +1,6 @@
-import {Component, ElementRef, EventEmitter, Inject, Input, OnInit, Output, ViewChild} from '@angular/core';
-import HostRecord from '../../../structures/HostRecord';
-import {ApiService} from '../../../service/api.service';
+import {Component, ElementRef, Inject, Input, OnInit, ViewChild} from '@angular/core';
+import {ApiService, ResourceNotAvailableOfflineError} from '../../../service/api.service';
 import {AlertController} from '@ionic/angular';
-import {Observable} from 'rxjs';
 import { APP_BASE_HREF } from '@angular/common';
 import {EditorService} from '../../../service/editor.service';
 import {EditorNodeContract} from '../../nodes/EditorNode.contract';
@@ -15,16 +13,12 @@ import {EditorNodeContract} from '../../nodes/EditorNode.contract';
 export class FilesComponent extends EditorNodeContract implements OnInit {
   @Input() nodeId: string;
   @ViewChild('uploadForm') uploadForm: ElementRef;
-  // @Input() readonly = false;
-  // @Input() hostRecord: HostRecord;
-  // @Output() hostRecordChange = new EventEmitter<HostRecord>();
-  // @Output() requestParentSave = new EventEmitter<FilesComponent>();
-  // @Output() requestParentDelete = new EventEmitter<FilesComponent>();
 
   public fileRecords: Array<any> = [];
   public pendingSetup = true;
   public dbRecord: any = {};
   public dirty = false;
+  public notAvailableOffline = false;
 
   public get readonly() {
     return !this.node || !this.editorService.canEdit();
@@ -32,7 +26,6 @@ export class FilesComponent extends EditorNodeContract implements OnInit {
 
   constructor(
       protected api: ApiService,
-      protected alerts: AlertController,
       public readonly editorService: EditorService,
       @Inject(APP_BASE_HREF) private baseHref: string
   ) { super(); }
@@ -55,45 +48,31 @@ export class FilesComponent extends EditorNodeContract implements OnInit {
     }
 
     if ( !this.node.Value.Value && !this.readonly ) {
-      await new Promise((res, rej) => {
-        this.api.post(`/files/${this.page.UUID}/${this.node.UUID}/create`).subscribe({
-          next: result => {
-            this.dbRecord = result.data;
-            this.fileRecords = result.data.files;
-            this.node.Value.Mode = 'files';
-            this.node.Value.Value = result.data.UUID;
-            this.node.value = result.data.UUID;
-            this.dirty = true;
-            res();
-          },
-          error: rej,
-        });
-      });
+      this.dbRecord = await this.api.createFileGroup(this.page.UUID, this.node.UUID);
+      this.fileRecords = this.dbRecord.files;
+      this.node.Value.Mode = 'files';
+      this.node.Value.Value = this.dbRecord.UUID;
+      this.node.value = this.dbRecord.UUID;
+      this.dirty = true;
     } else {
-      await new Promise((res, rej) => {
-        this.api.get(`/files/${this.page.UUID}/${this.node.UUID}/get/${this.node.Value.Value}`).subscribe({
-          next: result => {
-            this.dbRecord = result.data;
-            this.fileRecords = result.data.files;
-            res();
-          },
-          error: rej,
-        });
-      });
+      try {
+        this.dbRecord = await this.api.getFileGroup(this.page.UUID, this.node.UUID, this.node.Value.Value);
+        this.fileRecords = this.dbRecord.files;
+        this.notAvailableOffline = false;
+      } catch (e) {
+        if ( e instanceof ResourceNotAvailableOfflineError ) {
+          this.notAvailableOffline = true;
+        } else {
+          throw e;
+        }
+      }
     }
 
     this.pendingSetup = false;
   }
 
   public async performDelete(): Promise<void> {
-    await new Promise((res, rej) => {
-      this.api.post(`/files/${this.page.UUID}/${this.node.UUID}/delete/${this.node.Value.Value}`).subscribe({
-        next: result => {
-          res();
-        },
-        error: rej,
-      });
-    });
+    await this.api.deleteFileGroup(this.page.UUID, this.node.UUID, this.node.Value.Value);
   }
 
   ngOnInit() {

src/app/components/option-picker/option-picker.component.ts

@@ -2,6 +2,7 @@ import {Component, Input, OnInit} from '@angular/core';
 import {Router} from '@angular/router';
 import {ApiService} from '../../service/api.service';
 import {PopoverController} from '@ionic/angular';
+import {DatabaseService} from "../../service/db/database.service";
 
 @Component({
   selector: 'app-option-picker',
@@ -17,14 +18,16 @@ export class OptionPickerComponent implements OnInit {
       protected api: ApiService,
       protected router: Router,
       protected popover: PopoverController,
+      protected db: DatabaseService,
   ) { }
 
   ngOnInit() {}
 
-  onSelect(key) {
+  async onSelect(key) {
     if ( key === 'html_export' ) {
       window.open(this.api._build_url('/data/export/html'), '_blank');
     } else if ( key === 'logout' ) {
+      await this.db.purge();
       window.location.href = '/auth/logout';
     } else if ( key === 'toggle_darkmode' ) {
       this.toggleDark();

src/app/service/api.service.ts

@@ -10,6 +10,7 @@ import {Codium} from './db/Codium';
 import {Database} from './db/Database';
 import {DatabaseColumn} from './db/DatabaseColumn';
 import {DatabaseEntry} from './db/DatabaseEntry';
+import {FileGroup} from "./db/FileGroup";
 
 export class ResourceNotAvailableOfflineError extends Error {
   constructor(msg = 'This resource is not yet available offline on this device.') {
@@ -703,4 +704,101 @@ export class ApiService {
       });
     });
   }
+
+  public deleteFileGroup(PageId: string, NodeId: string, FileGroupId: string): Promise<void> {
+    return new Promise(async (res, rej) => {
+      const existingFileGroup = await this.db.fileGroups.where({ UUID: FileGroupId }).first() as FileGroup;
+
+      if ( this.isOffline ) {
+        if ( existingFileGroup ) {
+          existingFileGroup.deleted = true;
+          existingFileGroup.needsServerUpdate = true;
+          await existingFileGroup.save();
+          return res();
+        } else {
+          return rej(new ResourceNotAvailableOfflineError());
+        }
+      }
+
+      this.post(`/files/${PageId}/${NodeId}/delete/${FileGroupId}`).subscribe({
+        next: async result => {
+          if ( existingFileGroup ) {
+            await this.db.fileGroups.delete(existingFileGroup.id);
+            res();
+          }
+        },
+        error: rej,
+      });
+    });
+  }
+
+  public createFileGroup(PageId: string, NodeId: string): Promise<any> {
+    return new Promise(async (res, rej) => {
+      if ( this.isOffline ) {
+        const newFileGroup = new FileGroup(
+            NodeId,
+            PageId,
+            [],
+            JSON.stringify([]),
+            FileGroup.getUUID(),
+            true
+        );
+
+        await newFileGroup.save();
+        return res(newFileGroup.inflateToRecord());
+      }
+
+      this.post(`/files/${PageId}/${NodeId}/create`).subscribe({
+        next: async result => {
+          const newFileGroup = new FileGroup(
+              result.data.NodeId,
+              result.data.PageId,
+              result.data.FileIds,
+              JSON.stringify(result.data.files),
+              result.data.UUID
+          );
+
+          await newFileGroup.save();
+          res(result.data);
+        },
+        error: rej,
+      });
+    });
+  }
+
+  public getFileGroup(PageId: string, NodeId: string, FileGroupId: string): Promise<any> {
+    return new Promise(async (res, rej) => {
+      const existingFileGroup = await this.db.fileGroups.where({ UUID: FileGroupId }).first() as FileGroup;
+      if ( this.isOffline ) {
+        if ( existingFileGroup ) {
+          return res(existingFileGroup.inflateToRecord());
+        } else {
+          return rej(new ResourceNotAvailableOfflineError());
+        }
+      }
+
+      this.get(`/files/${PageId}/${NodeId}/get/${FileGroupId}`).subscribe({
+        next: async result => {
+          if ( existingFileGroup ) {
+            existingFileGroup.fillFromRecord(result.data);
+            existingFileGroup.needsServerUpdate = false;
+            await existingFileGroup.save();
+          } else {
+            const newFileGroup = new FileGroup(
+                result.data.NodeId,
+                result.data.PageId,
+                result.data.FileIds,
+                JSON.stringify(result.data.files),
+                result.data.UUID
+            );
+
+            await newFileGroup.save();
+          }
+
+          res(result.data);
+        },
+        error: rej,
+      });
+    });
+  }
 }

src/app/service/db/FileGroup.ts

@@ -0,0 +1,97 @@
+import {Model} from './Model';
+
+export interface IFileGroup {
+    id?: number;
+    NodeId: string;
+    PageId: string;
+    FileIds: string[];
+    filesJSON: string;
+    UUID: string;
+    needsServerUpdate?: boolean;
+    deleted?: boolean;
+}
+
+export class FileGroup extends Model<IFileGroup> implements IFileGroup {
+    id?: number;
+    NodeId: string;
+    PageId: string;
+    FileIds: string[];
+    filesJSON: string;
+    UUID: string;
+    needsServerUpdate?: boolean;
+    deleted?: boolean;
+
+    public static getTableName() {
+        return 'fileGroups';
+    }
+
+    public static getSchema() {
+        return '++id, NodeId, PageId, FileIds, filesJSON, UUID, needsServerUpdate, deleted';
+    }
+
+    constructor(
+        NodeId: string,
+        PageId: string,
+        FileIds: string[],
+        filesJSON: string,
+        UUID: string,
+        needsServerUpdate?: boolean,
+        deleted?: boolean,
+        id?: number
+    ) {
+        super();
+
+        this.NodeId = NodeId;
+        this.PageId = PageId;
+        this.FileIds = FileIds;
+        this.filesJSON = filesJSON;
+        this.UUID = UUID;
+
+        if ( typeof needsServerUpdate !== 'undefined' ) {
+            this.needsServerUpdate = needsServerUpdate;
+        }
+
+        if ( typeof deleted !== 'undefined' ) {
+            this.deleted = deleted;
+        }
+
+        if ( id ) {
+            this.id = id;
+        }
+    }
+
+    public fillFromRecord(record: any) {
+        this.NodeId = record.NodeId;
+        this.PageId = record.PageId;
+        this.FileIds = record.FileIds;
+        this.filesJSON = JSON.stringify(record.files);
+        this.UUID = record.UUID;
+    }
+
+    public inflateToRecord() {
+        return {
+            NodeId: this.NodeId,
+            PageId: this.PageId,
+            FileIds: this.FileIds,
+            files: JSON.parse(this.filesJSON),
+            UUID: this.UUID,
+        };
+    }
+
+    public getSaveRecord(): any {
+        return {
+            ...(this.id ? { id: this.id } : {}),
+            NodeId: this.NodeId,
+            PageId: this.PageId,
+            FileIds: this.FileIds,
+            filesJSON: this.filesJSON,
+            UUID: this.UUID,
+            ...(typeof this.needsServerUpdate === 'undefined' ? {} : { needsServerUpdate: this.needsServerUpdate }),
+            ...(typeof this.deleted === 'undefined' ? {} : { deleted: this.deleted }),
+        };
+    }
+
+    public getDatabase(): Dexie.Table<IFileGroup, number> {
+        return this.staticClass().dbService.table('fileGroups') as Dexie.Table<IFileGroup, number>;
+    }
+}

src/app/service/db/database.service.ts

@@ -7,12 +7,13 @@ import {Codium, ICodium} from './Codium';
 import {Database, IDatabase} from './Database';
 import {DatabaseColumn, IDatabaseColumn} from './DatabaseColumn';
 import {DatabaseEntry, IDatabaseEntry} from './DatabaseEntry';
+import {FileGroup, IFileGroup} from './FileGroup';
 
 @Injectable({
     providedIn: 'root'
 })
 export class DatabaseService extends Dexie {
-    protected static registeredModels = [Migration, MenuItem, KeyValue, Codium, Database, DatabaseColumn, DatabaseEntry];
+    protected static registeredModels = [Migration, MenuItem, KeyValue, Codium, Database, DatabaseColumn, DatabaseEntry, FileGroup];
     protected initialized = false;
 
     migrations!: Dexie.Table<IMigration, number>;
@@ -22,6 +23,7 @@ export class DatabaseService extends Dexie {
     databases!: Dexie.Table<IDatabase, number>;
     databaseColumns!: Dexie.Table<IDatabaseColumn, number>;
     databaseEntries!: Dexie.Table<IDatabaseEntry, number>;
+    fileGroups!: Dexie.Table<IFileGroup, number>;
 
     constructor(
     ) {
@@ -54,7 +56,7 @@ export class DatabaseService extends Dexie {
             schema[ModelClass.getTableName()] = ModelClass.getSchema();
         }
 
-        await this.version(9).stores(schema);
+        await this.version(11).stores(schema);
         await this.open();
 
         this.migrations = this.table('migrations');
@@ -77,5 +79,23 @@ export class DatabaseService extends Dexie {
 
         this.databaseEntries = this.table('databaseEntries');
         this.databaseEntries.mapToClass(DatabaseEntry);
+
+        this.fileGroups = this.table('fileGroups');
+        this.fileGroups.mapToClass(FileGroup);
+    }
+
+    public async purge() {
+        console.warn('Purging all local data!');
+
+        await Promise.all([
+            this.migrations.clear(),
+            this.menuItems.clear(),
+            this.keyValues.clear(),
+            this.codiums.clear(),
+            this.databases.clear(),
+            this.databaseColumns.clear(),
+            this.databaseEntries.clear(),
+            this.fileGroups.clear(),
+        ]);
     }
 }