wip: impl scheduler, import posts task

backend/task/src/tasks/import_posts.rs

@@ -0,0 +1,42 @@
+pub async fn import_posts(dir_path: &str, pool: &sqlx::Pool<sqlx::Postgres>) {
+    println!("hello from import_posts");
+    let entries = std::fs::read_dir(dir_path).unwrap();
+
+    for f in entries {
+        let file = f.unwrap();
+        let file_path = file.path();
+        if file_path.is_file() {
+            let file_name = file.file_name().to_str().unwrap();
+            let exists = sqlx::query_as::<_, FilenameExists>(
+                "SELECT EXISTS(SELECT 1 FROM posts WHERE filename = $1)",
+            )
+            .bind(file_name.clone())
+            .fetch_one(pool)
+            .await
+            .unwrap()
+            .filename;
+
+            if !exists.is_empty() {
+                let file_md_contents = std::fs::read_to_string(file).unwrap().as_str();
+                let content = markdown::to_html(file_md_contents);
+
+                sqlx::query_as::<_, InsertPosts>("INSERT INTO posts (title, body) VALUES ($1, $2)")
+                    .bind(file_name.clone())
+                    .fetch_one(pool)
+                    .await
+                    .unwrap();
+            }
+        }
+    }
+}
+
+#[derive(Debug, sqlx::FromRow)]
+struct FilenameExists {
+    filename: String,
+}
+
+#[derive(Debug, sqlx::FromRow)]
+struct InsertPosts {
+    title: String,
+    body: String,
+}