1 files changed, 45 insertions, 11 deletions
diff --git a/nuldoc-src/docbook/document.ts b/nuldoc-src/docbook/document.ts
index b779ac7..ae3159a 100644
--- a/nuldoc-src/docbook/document.ts
+++ b/nuldoc-src/docbook/document.ts
@@ -9,7 +9,7 @@ import {
   innerText,
 } from "../dom.ts";
 
-export type Document = {
+export class Document {
   root: Element;
   sourceFilePath: string;
   link: string;
@@ -17,7 +17,41 @@ export type Document = {
   summary: string; // TODO: should it be markup text?
   tags: string[];
   revisions: Revision[];
-};
+
+  constructor(
+    root: Element,
+    sourceFilePath: string,
+    link: string,
+    title: string,
+    summary: string,
+    tags: string[],
+    revisions: Revision[],
+  ) {
+    this.root = root;
+    this.sourceFilePath = sourceFilePath;
+    this.link = link;
+    this.title = title;
+    this.summary = summary;
+    this.tags = tags;
+    this.revisions = revisions;
+  }
+
+  getLatestRevision(): Revision {
+    return this.revisions[this.revisions.length - 1];
+  }
+
+  getOldestRevision(): Revision {
+    return this.revisions[0];
+  }
+
+  getUpdatedDate(): string {
+    return this.getLatestRevision().date;
+  }
+
+  getCreatedDate(): string {
+    return this.getOldestRevision().date;
+  }
+}
 
 export function createNewDocumentFromRootElement(
   root: Element,
@@ -96,13 +130,13 @@ export function createNewDocumentFromRootElement(
   const cwd = Deno.cwd();
   const contentDir = join(cwd, config.locations.contentDir);
   const link = sourceFilePath.replace(contentDir, "").replace(".xml", "/");
-  return {
-    root: root,
-    title: title,
-    summary: summary,
-    tags: tags,
-    revisions: revisions,
-    sourceFilePath: sourceFilePath,
-    link: link,
-  };
+  return new Document(
+    root,
+    sourceFilePath,
+    link,
+    title,
+    summary,
+    tags,
+    revisions,
+  );
 }