refactor(blog/nuldoc): use zod for runtime validation

2 files changed, 40 insertions, 44 deletions

diff --git a/vhosts/blog/nuldoc-src/ndoc/parse.ts b/vhosts/blog/nuldoc-src/ndoc/parse.ts
index 136bc53e..857c086c 100644
--- a/vhosts/blog/nuldoc-src/ndoc/parse.ts
+++ b/vhosts/blog/nuldoc-src/ndoc/parse.ts
@@ -3,6 +3,23 @@ import { Config } from "../config.ts";
 import { parseXmlString } from "../xml.ts";
 import { createNewDocumentFromRootElement, Document } from "./document.ts";
 import toHtml from "./to_html.ts";
+import { z } from "zod/mod.ts";
+
+const PostMetadataSchema = z.object({
+  article: z.object({
+    uuid: z.string(),
+    title: z.string(),
+    description: z.string(),
+    tags: z.array(z.string()),
+    revisions: z.array(z.object({
+      date: z.string(),
+      remark: z.string(),
+      isInternal: z.boolean().optional(),
+    })),
+  }),
+});
+
+type PostMetadata = z.infer<typeof PostMetadataSchema>;
 
 export async function parseNulDocFile(
   filePath: string,
@@ -11,7 +28,7 @@ export async function parseNulDocFile(
   try {
     const fileContent = await Deno.readTextFile(filePath);
     const parts = fileContent.split(/^---$/m);
-    const meta = parseMetaInfo(parts[1]);
+    const meta = parseMetadata(parts[1]);
     const root = parseXmlString("<?xml ?>" + parts[2]);
     const doc = createNewDocumentFromRootElement(root, meta, filePath, config);
     return toHtml(doc);
@@ -21,31 +38,6 @@ export async function parseNulDocFile(
   }
 }
 
-function parseMetaInfo(s: string): {
-  article: {
-    uuid: string;
-    title: string;
-    description: string;
-    tags: string[];
-    revisions: {
-      date: string;
-      remark: string;
-      isInternal?: boolean;
-    }[];
-  };
-} {
-  const root = parseToml(s) as {
-    article: {
-      uuid: string;
-      title: string;
-      description: string;
-      tags: string[];
-      revisions: {
-        date: string;
-        remark: string;
-        isInternal?: boolean;
-      }[];
-    };
-  };
-  return root;
+function parseMetadata(s: string): PostMetadata {
+  return PostMetadataSchema.parse(parseToml(s));
 }
diff --git a/vhosts/blog/nuldoc-src/slide/parse.ts b/vhosts/blog/nuldoc-src/slide/parse.ts
index 5daa6ed0..82510a95 100644
--- a/vhosts/blog/nuldoc-src/slide/parse.ts
+++ b/vhosts/blog/nuldoc-src/slide/parse.ts
@@ -1,28 +1,32 @@
 import { parse as parseToml } from "std/toml/mod.ts";
 import { Config } from "../config.ts";
 import { createNewSlideFromTomlRootObject, Slide } from "./slide.ts";
+import { z } from "zod/mod.ts";
+
+const SlideMetadataSchema = z.object({
+  slide: z.object({
+    uuid: z.string(),
+    title: z.string(),
+    event: z.string(),
+    talkType: z.string(),
+    link: z.string(),
+    tags: z.array(z.string()),
+    revisions: z.array(z.object({
+      date: z.string(),
+      remark: z.string(),
+      isInternal: z.boolean().optional(),
+    })),
+  }),
+});
 
 export async function parseSlideFile(
   filePath: string,
   config: Config,
 ): Promise<Slide> {
   try {
-    // TODO runtime assertion
-    const root = parseToml(await Deno.readTextFile(filePath)) as {
-      slide: {
-        uuid: string;
-        title: string;
-        event: string;
-        talkType: string;
-        link: string;
-        tags: string[];
-        revisions: {
-          date: string;
-          remark: string;
-          isInternal?: boolean;
-        }[];
-      };
-    };
+    const root = SlideMetadataSchema.parse(
+      parseToml(await Deno.readTextFile(filePath)),
+    );
     return createNewSlideFromTomlRootObject(root, filePath, config);
   } catch (e) {
     e.message = `${e.message} in ${filePath}`;