From 1b0872a93f74f31ac7eb8032ab1b9adf447e9c69 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Lohrer?= <info.empeiria@gmail.com>
Date: Tue, 21 Apr 2026 09:19:35 +0200
Subject: [PATCH] =?UTF-8?q?feat(publish):=20validatePost=20pr=C3=BCft=20a-?=
 =?UTF-8?q?tag-format?=
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---
 publish/src/core/validation.ts   | 11 +++++++++++
 publish/tests/validation_test.ts | 30 ++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/publish/src/core/validation.ts b/publish/src/core/validation.ts
index 17d1184..21792f3 100644
--- a/publish/src/core/validation.ts
+++ b/publish/src/core/validation.ts
@@ -27,4 +27,15 @@ export function validatePost(fm: Frontmatter): void {
   if (!(fm.date instanceof Date) || isNaN(fm.date.getTime())) {
     throw new Error('missing/invalid date (expected YAML date or ISO-string)')
   }
+  if (fm.a !== undefined) {
+    if (!Array.isArray(fm.a)) {
+      throw new Error('a must be a list of strings')
+    }
+    const coordRe = /^\d+:[0-9a-f]+:[a-z0-9][a-z0-9-]*$/
+    for (const coord of fm.a) {
+      if (typeof coord !== 'string' || !coordRe.test(coord)) {
+        throw new Error(`invalid a-tag: "${coord}" (expected "<kind>:<pubkey-hex>:<d-tag>")`)
+      }
+    }
+  }
 }
diff --git a/publish/tests/validation_test.ts b/publish/tests/validation_test.ts
index c38061d..547f06c 100644
--- a/publish/tests/validation_test.ts
+++ b/publish/tests/validation_test.ts
@@ -56,3 +56,33 @@ Deno.test('validatePost: akzeptiert ISO-string-date', () => {
   validatePost(fm)
   assertEquals(fm.date instanceof Date, true)
 })
+
+Deno.test('validatePost: akzeptiert a-tag im korrekten format', () => {
+  const fm = {
+    title: 'T',
+    slug: 'abc',
+    date: new Date('2024-01-01'),
+    a: ['30023:abcdef0123456789:other-slug'],
+  } as Frontmatter
+  validatePost(fm) // wirft nicht
+})
+
+Deno.test('validatePost: lehnt a-tag mit falschem format ab', () => {
+  const fm = {
+    title: 'T',
+    slug: 'abc',
+    date: new Date('2024-01-01'),
+    a: ['nur-ein-string'],
+  } as Frontmatter
+  assertThrows(() => validatePost(fm), Error, 'invalid a-tag')
+})
+
+Deno.test('validatePost: lehnt a-tag mit fehlendem d-tag ab', () => {
+  const fm = {
+    title: 'T',
+    slug: 'abc',
+    date: new Date('2024-01-01'),
+    a: ['30023:abcdef:'],
+  } as Frontmatter
+  assertThrows(() => validatePost(fm), Error, 'invalid a-tag')
+})