1 files changed, 224 insertions, 0 deletions
diff --git a/src/utils/helpers/schema-org.ts b/src/utils/helpers/schema-org.ts
new file mode 100644
index 0000000..cdace00
--- /dev/null
+++ b/src/utils/helpers/schema-org.ts
@@ -0,0 +1,224 @@
+import { Dates } from '@ts/types/app';
+import { settings } from '@utils/config';
+import {
+  AboutPage,
+  Article,
+  Blog,
+  BlogPosting,
+  ContactPage,
+  Graph,
+  WebPage,
+} from 'schema-dts';
+
+export type GetBlogSchemaProps = {
+  /**
+   * True if the page is part of the blog.
+   */
+  isSinglePage: boolean;
+  /**
+   * The page locale.
+   */
+  locale: string;
+  /**
+   * The page slug with a leading slash.
+   */
+  slug: string;
+};
+
+/**
+ * Retrieve the JSON for Blog schema.
+ *
+ * @param props - The page data.
+ * @returns {Blog} The JSON for Blog schema.
+ */
+export const getBlogSchema = ({
+  isSinglePage,
+  locale,
+  slug,
+}: GetBlogSchemaProps): Blog => {
+  return {
+    '@id': `${settings.url}/#blog`,
+    '@type': 'Blog',
+    author: { '@id': `${settings.url}/#branding` },
+    creator: { '@id': `${settings.url}/#branding` },
+    editor: { '@id': `${settings.url}/#branding` },
+    blogPost: isSinglePage ? { '@id': `${settings.url}/#article` } : undefined,
+    inLanguage: locale,
+    isPartOf: isSinglePage
+      ? {
+          '@id': `${settings.url}${slug}`,
+        }
+      : undefined,
+    license: 'https://creativecommons.org/licenses/by-sa/4.0/deed.fr',
+    mainEntityOfPage: isSinglePage
+      ? undefined
+      : { '@id': `${settings.url}${slug}` },
+  };
+};
+
+export type SinglePageSchemaReturn = {
+  about: AboutPage;
+  contact: ContactPage;
+  page: Article;
+  post: BlogPosting;
+};
+
+export type SinglePageSchemaKind = keyof SinglePageSchemaReturn;
+
+export type GetSinglePageSchemaProps<T extends SinglePageSchemaKind> = {
+  /**
+   * The number of comments.
+   */
+  commentsCount?: number;
+  /**
+   * The page content.
+   */
+  content?: string;
+  /**
+   * The url of the cover.
+   */
+  cover?: string;
+  /**
+   * The page dates.
+   */
+  dates: Dates;
+  /**
+   * The page description.
+   */
+  description: string;
+  /**
+   * The page id.
+   */
+  id: string;
+  /**
+   * The page kind.
+   */
+  kind: T;
+  /**
+   * The page locale.
+   */
+  locale: string;
+  /**
+   * The page slug with a leading slash.
+   */
+  slug: string;
+  /**
+   * The page title.
+   */
+  title: string;
+};
+
+/**
+ * Retrieve the JSON schema depending on the page kind.
+ *
+ * @param props - The page data.
+ * @returns {SinglePageSchemaReturn[T]} - Either AboutPage, ContactPage, Article or BlogPosting schema.
+ */
+export const getSinglePageSchema = <T extends SinglePageSchemaKind>({
+  commentsCount,
+  content,
+  cover,
+  dates,
+  description,
+  id,
+  kind,
+  locale,
+  title,
+  slug,
+}: GetSinglePageSchemaProps<T>): SinglePageSchemaReturn[T] => {
+  const publicationDate = new Date(dates.publication);
+  const updateDate = dates.update ? new Date(dates.update) : undefined;
+  const singlePageSchemaType = {
+    about: 'AboutPage',
+    contact: 'ContactPage',
+    page: 'Article',
+    post: 'BlogPosting',
+  };
+
+  return {
+    '@id': `${settings.url}/#${id}`,
+    '@type': singlePageSchemaType[kind],
+    name: title,
+    description,
+    articleBody: content,
+    author: { '@id': `${settings.url}/#branding` },
+    commentCount: commentsCount,
+    copyrightYear: publicationDate.getFullYear(),
+    creator: { '@id': `${settings.url}/#branding` },
+    dateCreated: publicationDate.toISOString(),
+    dateModified: updateDate && updateDate.toISOString(),
+    datePublished: publicationDate.toISOString(),
+    editor: { '@id': `${settings.url}/#branding` },
+    headline: title,
+    image: cover,
+    inLanguage: locale,
+    license: 'https://creativecommons.org/licenses/by-sa/4.0/deed.fr',
+    thumbnailUrl: cover,
+    isPartOf:
+      kind === 'post'
+        ? {
+            '@id': `${settings.url}/blog`,
+          }
+        : undefined,
+    mainEntityOfPage: { '@id': `${settings.url}${slug}` },
+  } as SinglePageSchemaReturn[T];
+};
+
+export type GetWebPageSchemaProps = {
+  /**
+   * The page description.
+   */
+  description: string;
+  /**
+   * The page locale.
+   */
+  locale: string;
+  /**
+   * The page slug.
+   */
+  slug: string;
+  /**
+   * The page title.
+   */
+  title: string;
+  /**
+   * The page last update.
+   */
+  updateDate?: string;
+};
+
+/**
+ * Retrieve the JSON for WebPage schema.
+ *
+ * @param props - The page data.
+ * @returns {WebPage} The JSON for WebPage schema.
+ */
+export const getWebPageSchema = ({
+  description,
+  locale,
+  slug,
+  title,
+  updateDate,
+}: GetWebPageSchemaProps): WebPage => {
+  return {
+    '@id': `${settings.url}${slug}`,
+    '@type': 'WebPage',
+    breadcrumb: { '@id': `${settings.url}/#breadcrumb` },
+    lastReviewed: updateDate,
+    name: title,
+    description: description,
+    inLanguage: locale,
+    reviewedBy: { '@id': `${settings.url}/#branding` },
+    url: `${settings.url}${slug}`,
+    isPartOf: {
+      '@id': `${settings.url}`,
+    },
+  };
+};
+
+export const getSchemaJson = (graphs: Graph['@graph']): Graph => {
+  return {
+    '@context': 'https://schema.org',
+    '@graph': graphs,
+  };
+};