Add: Post Count API

src/lib/server/db/post.js

@@ -47,6 +47,29 @@ function parsePostFromRow(author, category, row, withMetrics = false) {
   };
 }
 
+/**
+ * @param {{
+ *  category?: import('$types/base').Category | undefined
+ * }} opts 
+ * @returns {Promise<number>}
+ */
+export async function getPostCount(opts = {}) {
+  const {
+    category = undefined
+  } = opts;
+
+  const filter = category ? sql`WHERE category_id = ${ category.id }` : sql``;
+
+  const query = sql`
+    SELECT COUNT(*)
+    FROM doki8902.message_post
+    ${ filter };`;
+
+  const count = await query;
+
+  return count[0]['count'];
+}
+
 /**
  * @param {{
  *  category?: import('$types/base').Category | undefined,