Allow retrieval from languageHashes using environment (DSpace#2702)

src/config/app-config.interface.ts

@@ -22,6 +22,7 @@ import { HomeConfig } from './homepage-config.interface';
 import { MarkdownConfig } from './markdown-config.interface';
 import { FilterVocabularyConfig } from './filter-vocabulary-config';
 import { DiscoverySortConfig } from './discovery-sort.config';
+import { LanguageHashesConfig } from './languageHashes-config.interface';
 
 interface AppConfig extends Config {
   ui: UIServerConfig;
@@ -35,6 +36,7 @@ interface AppConfig extends Config {
   debug: boolean;
   defaultLanguage: string;
   languages: LangConfig[];
+  languageHashes: LanguageHashesConfig[];
   browseBy: BrowseByConfig;
   communityList: CommunityListConfig;
   homePage: HomeConfig;

src/config/default-app-config.ts

@@ -22,6 +22,7 @@ import { HomeConfig } from './homepage-config.interface';
 import { MarkdownConfig } from './markdown-config.interface';
 import { FilterVocabularyConfig } from './filter-vocabulary-config';
 import { DiscoverySortConfig } from './discovery-sort.config';
+import { LanguageHashesConfig } from './languageHashes-config.interface';
 
 export class DefaultAppConfig implements AppConfig {
   production = false;
@@ -242,6 +243,8 @@ export class DefaultAppConfig implements AppConfig {
     { code: 'uk', label: 'Yкраї́нська', active: true}
   ];
 
+  languageHashes: LanguageHashesConfig[] = [];
+
   // Browse-By Pages
   browseBy: BrowseByConfig = {
     // Amount of years to display using jumps of one year (current year - oneYearLimit)

src/config/languageHashes-config.interface.ts

@@ -0,0 +1,11 @@
+import { Config } from './config.interface';
+
+/**
+ * An interface to represent a language in the configuration. A LangConfig has a code which should be the official
+ * language code for the language (e.g. ‘fr’), a label which should be the name of the language in that language
+ * (e.g. ‘Français’), and a boolean to determine whether or not it should be listed in the language select.
+ */
+export interface LanguageHashesConfig extends Config {
+      lang: string;
+      md5: string;
+}

src/ngx-translate-loaders/translate-browser.loader.ts

@@ -34,7 +34,11 @@ export class TranslateBrowserLoader implements TranslateLoader {
     if (hasValue(messages)) {
       return observableOf(messages);
     } else {
-      const translationHash: string = environment.production ? `.${(process.env.languageHashes as any)[lang + '.json5']}` : '';
+      let translationHash = '';
+      if (environment.production) {
+        const languageHashesConfigFromEnvironment = environment.languageHashes.filter((languageHashConfig) => languageHashConfig.lang === lang);
+        translationHash = `.${languageHashesConfigFromEnvironment.length > 0 ? languageHashesConfigFromEnvironment[0].md5 : (process.env.languageHashes as any)[lang + '.json5']}`;
+      }
       // If they're not available on the transfer state (e.g. when running in dev mode), retrieve
       // them using HttpClient
       return this.http.get(`${this.prefix}${lang}${translationHash}${this.suffix}`, { responseType: 'text' }).pipe(

src/ngx-translate-loaders/translate-server.loader.ts

@@ -3,6 +3,7 @@ import { Observable, of as observableOf } from 'rxjs';
 import { readFileSync } from 'fs';
 import { TransferState } from '@angular/platform-browser';
 import { NGX_TRANSLATE_STATE, NgxTranslateState } from './ngx-translate-state';
+import { environment } from '../environments/environment';
 
 /**
  * A TranslateLoader for ngx-translate to parse json5 files server-side, and store them in the
@@ -23,7 +24,9 @@ export class TranslateServerLoader implements TranslateLoader {
    * @param lang the language code
    */
   public getTranslation(lang: string): Observable<any> {
-    const translationHash: string = (process.env.languageHashes as any)[lang + '.json5'];
+    const languageHashesConfigFromEnvironment = environment.languageHashes.filter((languageHashConfig) => languageHashConfig.lang === lang);
+    const translationHash = `.${languageHashesConfigFromEnvironment.length > 0 ? languageHashesConfigFromEnvironment[0].md5 : (process.env.languageHashes  as any)[lang + '.json5']}`;
+
     // Retrieve the file for the given language, and parse it
     const messages = JSON.parse(readFileSync(`${this.prefix}${lang}.${translationHash}${this.suffix}`, 'utf8'));
     // Store the parsed messages in the transfer state so they'll be available immediately when the