[Issue comixed#207] Add the PublisherPipe class and tests.

comixed-frontend/src/app/comics/comics.constants.ts

@@ -40,3 +40,5 @@ export const GET_VOLUMES_URL = `${API_ROOT_URL}/scraping/series/\${series}`;
 export const GET_ISSUE_URL = `${API_ROOT_URL}/scraping/volumes/\${volume}/issues/\${issue}`;
 
 export const LOAD_METADATA_URL = `${API_ROOT_URL}/scraping/comics/\${comicId}/issue/\${issueId}`;
+
+export const PUBLISHER_IMPRINT_FORMAT = `\${publisher} (\${imprint})`;

comixed-frontend/src/app/comics/comics.module.ts

@@ -74,6 +74,7 @@ import { ScrapingIssueCoverUrlPipe } from './pipes/scraping-issue-cover-url.pipe
 import * as fromComics from './reducers/comic.reducer';
 import * as fromScraping from './reducers/scraping.reducer';
 import { PublisherThumbnailUrlPipe } from './pipes/publisher-thumbnail-url.pipe';
+import { PublisherPipe } from './pipes/publisher.pipe';
 
 @NgModule({
   declarations: [
@@ -92,7 +93,8 @@ import { PublisherThumbnailUrlPipe } from './pipes/publisher-thumbnail-url.pipe'
     ComicCoverUrlPipe,
     ComicDownloadLinkPipe,
     ScrapingIssueCoverUrlPipe,
-    PublisherThumbnailUrlPipe
+    PublisherThumbnailUrlPipe,
+    PublisherPipe
   ],
   imports: [
     UserModule,

comixed-frontend/src/app/comics/pipes/publisher.pipe.spec.ts

@@ -0,0 +1,58 @@
+/*
+ * ComiXed - A digital comic book library management application.
+ * Copyright (C) 2020, The ComiXed Project
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses>
+ */
+
+import { PublisherPipe } from './publisher.pipe';
+import { COMIC_2 } from 'app/comics/comics.fixtures';
+import { interpolate } from 'app/app.functions';
+import { PUBLISHER_IMPRINT_FORMAT } from 'app/comics/comics.constants';
+
+describe('PublisherPipe', () => {
+  const PUBLISHER = 'The Publisher';
+  const IMPRINT = 'The Imprint';
+
+  let pipe: PublisherPipe;
+
+  beforeEach(() => {
+    pipe = new PublisherPipe();
+  });
+
+  it('create an instance', () => {
+    expect(pipe).toBeTruthy();
+  });
+
+  it('returns an empty string if no publisher is defined', () => {
+    expect(pipe.transform({ ...COMIC_2, publisher: null })).toEqual('');
+  });
+
+  it('shows only the publisher if no imprint is defined', () => {
+    expect(
+      pipe.transform({ ...COMIC_2, publisher: PUBLISHER, imprint: null })
+    ).toEqual(PUBLISHER);
+  });
+
+  it('includes the imprint if present', () => {
+    expect(
+      pipe.transform({ ...COMIC_2, publisher: PUBLISHER, imprint: IMPRINT })
+    ).toEqual(
+      interpolate(PUBLISHER_IMPRINT_FORMAT, {
+        publisher: PUBLISHER,
+        imprint: IMPRINT
+      })
+    );
+  });
+});

comixed-frontend/src/app/comics/pipes/publisher.pipe.ts

@@ -0,0 +1,38 @@
+/*
+ * ComiXed - A digital comic book library management application.
+ * Copyright (C) 2020, The ComiXed Project
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses>
+ */
+
+import { Pipe, PipeTransform } from '@angular/core';
+import { Comic } from 'app/comics';
+import { interpolate } from 'app/app.functions';
+import { PUBLISHER_IMPRINT_FORMAT } from 'app/comics/comics.constants';
+
+@Pipe({
+  name: 'publisher'
+})
+export class PublisherPipe implements PipeTransform {
+  transform(comic: Comic): string {
+    if (!!comic.imprint) {
+      return interpolate(PUBLISHER_IMPRINT_FORMAT, {
+        publisher: comic.publisher,
+        imprint: comic.imprint
+      });
+    }
+
+    return comic.publisher || '';
+  }
+}