tech(api): move in common src initialize fonts in pdf lib document

Co-authored-by: Xavier Carron <xavier.carron@pix.fr>

Author: laura-bergoens

Diff for: api/src/prescription/target-profile/application/presenter/pdf/learning-content-pdf-presenter.js

@@ -1,6 +1,5 @@
 import 'dayjs/locale/fr.js';
 
-import pdfLibFontKit from '@pdf-lib/fontkit';
 import { PDFDocument } from 'pdf-lib';
 
 import * as coverPageBuilder from './builder/cover-page-builder.js';
@@ -9,7 +8,7 @@ import { FontManager } from './manager/font-manager.js';
 import * as TemplatePageManager from './manager/template-page-manager.js';
 
 const present = async function (learningContent, title, language) {
-  const pdfDocument = await _initializeNewPDFDocument(pdfLibFontKit);
+  const pdfDocument = await _initializeNewPDFDocument();
   coverPageBuilder.build(pdfDocument, title, language);
   const pdfBytes = await learningContentBuilder.build(pdfDocument, learningContent, language).save();
   return Buffer.from(pdfBytes);
@@ -18,13 +17,11 @@ const present = async function (learningContent, title, language) {
 export { present };
 
 /**
- * @param fontKit {Fontkit}
  * @returns {Promise<PDFDocument>}
  * @private
  */
-async function _initializeNewPDFDocument(fontKit) {
+async function _initializeNewPDFDocument() {
   const pdfDocument = await PDFDocument.create();
-  pdfDocument.registerFontkit(fontKit);
   await FontManager.initializeFonts(pdfDocument);
   await TemplatePageManager.initializeTemplatesPages(pdfDocument);
   return pdfDocument;

Diff for: api/src/prescription/target-profile/application/presenter/pdf/manager/font-manager.js

@@ -1,9 +1,6 @@
-import { readFile } from 'node:fs/promises';
-import * as url from 'node:url';
+import { FONTS, initializeFonts } from '../../../../../../shared/infrastructure/serializers/pdf/utils.js';
 
-const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
-
-const embeddedFonts = {};
+let embeddedFonts = {};
 const COVER_PAGE_VERSION_TEXT_FONT_SIZE = 20;
 const COVER_PAGE_LEGAL_MENTION_TEXT_FONT_SIZE = 10;
 const COVER_PAGE_TITLE_TEXT_FONT_SIZE = 30;
@@ -14,13 +11,6 @@ const TUBE_TITLE_TEXT_FONT_SIZE = 7;
 const TUBE_DESCRIPTION_TEXT_FONT_SIZE = 7.5;
 const THEMATIC_TEXT_FONT_SIZE = 7;
 
-const fonts = {
-  robotoCondensedBold: 'RobotoCondensed-Bold.ttf',
-  robotoCondensedLight: 'RobotoCondensed-Light.ttf',
-  robotoCondensedRegular: 'RobotoCondensed-Regular.ttf',
-  robotoRegular: 'Roboto-Regular.ttf',
-};
-
 const FontManager = {
   key: {
     robotoCondensedBold: 'robotoCondensedBold',
@@ -178,15 +168,16 @@ const FontManager = {
 
   /**
    * @param pdfDocument {PDFDocument}
-   * @param dirname {string}
    * @returns {Promise<void>}
    */
   async initializeFonts(pdfDocument) {
-    for (const fontKey in fonts) {
-      const fontFilename = fonts[fontKey];
-      const fontFile = await readFile(`${__dirname}/fonts/${fontFilename}`);
-      embeddedFonts[fontKey] = await pdfDocument.embedFont(fontFile, { subset: true, customName: fontFilename });
-    }
+    const newEmbeddedFonts = await initializeFonts(pdfDocument, [
+      FONTS.robotoCondensedBold,
+      FONTS.robotoCondensedLight,
+      FONTS.robotoCondensedRegular,
+      FONTS.robotoRegular,
+    ]);
+    embeddedFonts = Object.assign(embeddedFonts, newEmbeddedFonts);
   },
 };
 

Diff for: api/src/prescription/target-profile/application/presenter/pdf/manager/fonts/Roboto-Regular.ttf renamed to api/src/shared/infrastructure/serializers/pdf/fonts/Roboto-Regular.ttf

@@ -0,0 +1,37 @@
+import { readFile } from 'node:fs/promises';
+import * as url from 'node:url';
+
+import pdfLibFontKit from '@pdf-lib/fontkit';
+
+const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
+
+export const FONTS = {
+  robotoCondensedBold: 'robotoCondensedBold',
+  robotoCondensedLight: 'robotoCondensedLight',
+  robotoCondensedRegular: 'robotoCondensedRegular',
+  robotoRegular: 'robotoRegular',
+};
+
+const FONT_FILES_BY_FONT_KEY = {
+  [FONTS.robotoCondensedBold]: 'RobotoCondensed-Bold.ttf',
+  [FONTS.robotoCondensedLight]: 'RobotoCondensed-Light.ttf',
+  [FONTS.robotoCondensedRegular]: 'RobotoCondensed-Regular.ttf',
+  [FONTS.robotoRegular]: 'Roboto-Regular.ttf',
+};
+
+/**
+ * @param pdfDocument {PDFDocument}
+ * @param fontsKeysToEmbed {Array<string>}
+ * @returns {Promise<Object<key: string, value: StandardFonts>>}
+ */
+export async function initializeFonts(pdfDocument, fontsKeysToEmbed) {
+  pdfDocument.registerFontkit(pdfLibFontKit);
+  const finalFontKeysToEmbed = fontsKeysToEmbed.length > 0 ? fontsKeysToEmbed : Object.values(FONTS);
+  const embeddedFonts = {};
+  for (const fontKey of finalFontKeysToEmbed) {
+    const fontFilename = FONT_FILES_BY_FONT_KEY[fontKey];
+    const fontFile = await readFile(`${__dirname}/fonts/${fontFilename}`);
+    embeddedFonts[fontKey] = await pdfDocument.embedFont(fontFile, { subset: true, customName: fontFilename });
+  }
+  return embeddedFonts;
+}