1 files changed, 102 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..bffbe5f
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,102 @@
+#include <iostream>
+#include <string>
+#include <string_view>
+#include <toml++/toml.hpp>
+#include <fstream>
+#include <cassert>
+
+using namespace std::string_literals;
+struct MainConfig {
+	std::string title;
+  std::string url;
+  std::string author;
+};
+
+struct FrontmatterConfig {
+  std::string title;
+  std::string date;
+  std::string categories;
+  std::string tags;
+  bool draft;
+};
+
+struct Config {
+  MainConfig main;
+  FrontmatterConfig frontmatter;
+};
+
+Config
+parse_config(const std::string& filepath)
+{
+  toml::table tbl;
+  Config cfg;
+
+  try {
+    tbl = toml::parse_file(filepath);
+  } catch (const toml::parse_error& err) {
+    std::cerr << "parsing failed: " << err << std::endl;
+    throw;
+  }
+
+  if (auto* main = tbl["main"].as_table()) {
+    cfg.main.title  = (*main)["title"].value_or("untitled's blog");
+    cfg.main.url    = (*main)["url"].value_or("localhost");
+    cfg.main.author = (*main)["author"].value_or("linus");
+  }
+  return cfg;
+}
+
+Config
+frontmatter(const std::string& filepath)
+{
+  Config cfg;
+  std::ifstream file(filepath);
+  std::string content((std::istreambuf_iterator<char>(file)),
+      std::istreambuf_iterator<char>());
+
+  const size_t first_fence = content.find("+++");
+  const size_t second_fence = (first_fence == std::string::npos)
+    ? std::string::npos
+    : content.find("+++", first_fence + 3);
+
+  /* TIL: npos == no position */
+  if (first_fence != std::string::npos && second_fence != std::string::npos) {
+    std::string fm = content.substr(first_fence + 3, 
+        second_fence - (first_fence+3));
+    try { 
+      toml::parse_result result = toml::parse(fm);
+      const toml::table& tbl = result;
+    cfg.frontmatter.title = tbl["title"].value_or(""s);
+    cfg.frontmatter.date = tbl["date"].value_or(""s);
+    cfg.frontmatter.categories = tbl["categories"].value_or(""s);
+    cfg.frontmatter.tags = tbl["tags"].value_or(""s);
+    cfg.frontmatter.draft = tbl["draft"].value_or(true);
+    }  catch(const toml::parse_error& err) {
+      std::cerr << "parsing failed: " << err << std::endl;
+      throw;
+    }
+  }
+  return cfg;
+}
+
+int main(int argc, char *argv[]) { 
+  try {
+    Config my_config = parse_config("config.toml");
+
+    std::cout << "title name: " << my_config.main.title << std::endl;
+    std::cout << "url name: " << my_config.main.url << std::endl;
+    std::cout << "author: " << my_config.main.author << std::endl;
+
+    Config front = frontmatter(argv[1]);
+    std::cout << "title page: " << front.frontmatter.title << std::endl;
+    std::cout << "title date: " << front.frontmatter.title << std::endl;
+    std::cout << "title categories: " << front.frontmatter.categories << std::endl;
+    std::cout << "title tags: " << front.frontmatter.tags << std::endl;
+    std::cout << "title draft: " << front.frontmatter.draft << std::endl;
+  
+  } catch (const std::exception& e) {
+    std::cerr << e.what() << std::endl;
+    return 1;
+  }
+  return 0;
+}