From 9f9685170c89ecd1c9f6c8613309aaa4528dbad3 Mon Sep 17 00:00:00 2001
From: Szymon P <szymon_jozef@proton.me>
Date: Sat, 3 Jan 2026 21:21:09 +0100
Subject: [PATCH] added markdown metadata parsing

---
 src/markdown.cpp | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/markdown.hpp | 20 ++++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 src/markdown.cpp
 create mode 100644 src/markdown.hpp

diff --git a/src/markdown.cpp b/src/markdown.cpp
new file mode 100644
index 0000000..fdb7f86
--- /dev/null
+++ b/src/markdown.cpp
@@ -0,0 +1,43 @@
+#include "markdown.hpp"
+#include "utils.hpp"
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <md4c-html.h>
+#include <optional>
+
+std::optional<Metadata> get_metadata(const std::string &FILE_PATH) {
+  std::fstream file(FILE_PATH);
+  std::string buffer;
+
+  if (!getline(file, buffer) || buffer != "---") {
+    std::cerr << "File " << FILE_PATH << "does not contain metadata."
+              << std::endl;
+    return std::nullopt;
+  }
+
+  std::map<std::string, std::string> metadata_map;
+
+  while (getline(file, buffer)) {
+    if (buffer == "---") {
+      break;
+    }
+    size_t colon_pos = buffer.find(":");
+
+    if (colon_pos == std::string::npos) {
+      std::cerr << "The line: \n"
+                << buffer << " does not contain a colon" << std::endl;
+    }
+
+    std::string key = buffer.substr(0, colon_pos);
+    trim(key);
+
+    std::string value = buffer.substr(colon_pos + 1);
+    trim(value);
+    metadata_map[key] = value;
+  }
+
+  return std::optional(Metadata{metadata_map["author"], metadata_map["date"],
+                                metadata_map["title"],
+                                convert_string_to_set(metadata_map["tags"])});
+}
diff --git a/src/markdown.hpp b/src/markdown.hpp
new file mode 100644
index 0000000..8df17fd
--- /dev/null
+++ b/src/markdown.hpp
@@ -0,0 +1,20 @@
+#include <optional>
+#include <set>
+#include <string>
+
+struct Metadata {
+  std::string author;
+  std::string date;
+  std::string title;
+  std::set<std::string> tags;
+};
+
+// Reads the metadata of the markdown file
+// Metadata are in yaml format at the top of the file
+// They are separated from the rest of the file with `---` at the beginning and
+// at the end.
+std::optional<Metadata> get_metadata(const std::string &FILE_PATH);
+
+// Reads the markdown file and converts it to html.
+// Return everything in one string
+std::string get_html(const std::string &FILE_PATH);