Merge branch 'workaround-for-not-found-english-translation-file' into 'master'

Add workaround for missing default English translation file when using Web API 2.4 or older.

See merge request openlp/web-remote!92

package.json

@@ -38,8 +38,10 @@
     "@ngx-translate/core": "^15.0.0",
     "@ngx-translate/http-loader": "^8.0.0",
     "core-js": "^3.36.1",
+    "deepmerge-ts": "^5.1.0",
     "hammerjs": "^2.0.8",
     "material-icons": "^1.13.12",
+    "ngx-translate-multi-http-loader": "^17.0.0",
     "rxjs": "^7.8.1",
     "zone.js": "^0.14.4"
   },

src/app/app.module.ts

@@ -1,7 +1,7 @@
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { BrowserModule, Title } from '@angular/platform-browser';
 import { FormsModule } from '@angular/forms';
-import { HttpClient, HttpClientModule } from '@angular/common/http';
+import { HttpBackend, HttpClientModule } from '@angular/common/http';
 import { NgModule } from '@angular/core';
 
 import { MatButtonModule } from '@angular/material/button';
@@ -24,7 +24,7 @@ import { MatBottomSheetModule } from '@angular/material/bottom-sheet';
 import { MatSliderModule } from '@angular/material/slider';
 
 import { TranslateModule, TranslateLoader } from '@ngx-translate/core';
-import { TranslateHttpLoader } from '@ngx-translate/http-loader';
+import { MultiTranslateHttpLoader } from 'ngx-translate-multi-http-loader';
 
 import { AppComponent } from './app.component';
 import { PageTitleService } from './page-title.service';
@@ -54,8 +54,11 @@ import { SettingsComponent } from './components/settings/settings.component';
 import { StageChordPreviewComponent } from './components/settings/stage-chord-preview/stage-chord-preview.component';
 
 // AoT requires an exported function for factories
-export function createTranslateLoader(http: HttpClient) {
-  return new TranslateHttpLoader(http, './assets/i18n/', '.json');
+export function HttpLoaderFactory(httpBackend: HttpBackend) {
+  return new MultiTranslateHttpLoader(httpBackend, [
+    { prefix: './assets/i18n/', optional: true },
+    { prefix: './assets/', optional: true } // Workaround for Web API 2.4 or older to prevent HTTP 404 errors while retrieving the en.json file when using Web Remote 0.9.16 or newer.
+  ]);
 }
 
 @NgModule({
@@ -111,8 +114,8 @@ export function createTranslateLoader(http: HttpClient) {
       defaultLanguage: 'en',
       loader: {
         provide: TranslateLoader,
-        useFactory: (createTranslateLoader),
-        deps: [HttpClient]
+        useFactory: (HttpLoaderFactory),
+        deps: [HttpBackend]
       }
     })
   ],

src/assets/en.json

@@ -0,0 +1,53 @@
+{
+  "_COMMENT": "This file located here instead of in the i18n directory is a workaround for Web API 2.4 or older to prevent HTTP 404 errors while retrieving the en.json file when using Web Remote 0.9.16 or newer.",
+  "ADD_ITEM": "Add Item",
+  "ADD_ITEM_TO_SERVICE": "Add Item to Service",
+  "ADD_TO_SERVICE": "Add to Service",
+  "ALERT": "Alert",
+  "ALERTS": "Alerts",
+  "CHANGE_DISPLAY_MODE": "Change Display Mode",
+  "CHORD_VIEW": "Chord View",
+  "CHORDS": "Chords",
+  "CONNECTED_TO_OPENLP": "Connected to OpenLP",
+  "DISCONNECTED": "Disconnected",
+  "ENABLE_BIG_DISPLAY_BUTTONS": "Enable Big Display Buttons",
+  "ENABLE_FAST_SWITCHING_PANEL": "Enable Fast Switching Panel",
+  "FONT_SCALE": "Font Scale",
+  "GLOBAL": "Global",
+  "GO_BACK_TO_CONTROLLER": "Go Back to Controller",
+  "HIDE_NOTES": "Hide Notes",
+  "LOGIN": "Login",
+  "MAIN_VIEW": "Main View",
+  "NEXT_ITEM": "Next Item",
+  "NEXT_SLIDE": "Next Slide",
+  "NO_SEARCH_RESULTS": "No results matching your search were found",
+  "NO_SERVICE_ITEMS": "No Service Items",
+  "NO_SLIDE_ITEMS": "No Slide Items",
+  "PASSWORD": "Password",
+  "PREVIOUS_ITEM": "Previous Item",
+  "PREVIOUS_SLIDE": "Previous Slide",
+  "SEARCH": "Search",
+  "SEARCH_RESULTS": "Search Results",
+  "SEARCH_TEXT": "Search Text",
+  "SEND": "Send",
+  "SEND_AN_ALERT": "Send an Alert",
+  "SEND_LIVE": "Send Live",
+  "SERVICE": "Service",
+  "SETTINGS": "Settings",
+  "SHOW_BACKGROUND": "Show Background",
+  "SHOW_BLACK": "Show Black",
+  "SHOW_DESKTOP": "Show Desktop",
+  "SHOW_NOTES": "Show Notes",
+  "SHOW_PRESENTATION": "Show Presentation",
+  "SLIDES": "Slides",
+  "SONG": "Song",
+  "SONG_LEVEL_THEME_CHANGING_NOT_SUPPORTED": "Song level theme changing not supported. Change your theme level to Global or Service",
+  "STAGE": "Stage",
+  "STAGE_AND_CHORDS_APPEARANCE": "Stage and Chords Appearance",
+  "STAGE_VIEW": "Stage View",
+  "THEMES": "Themes",
+  "THEME_LEVEL": "Theme Level",
+  "THEME_OPTIONS": "Theme Options",
+  "USER_NAME": "User Name",
+  "USER_INTERFACE": "User Interface"
+}