Travel3: Simple image and video display site

Reads the images and videos from filesystem and builds a site in
memroy.

1 files changed, 57 insertions, 0 deletions

diff --git a/src/logger.hh b/src/logger.hh
new file mode 100644
index 0000000..47bbedd
--- /dev/null
+++ b/src/logger.hh
@@ -0,0 +1,57 @@
+#ifndef LOGGER_HH
+#define LOGGER_HH
+
+#include <filesystem>
+#include <memory>
+#include <string>
+
+class Logger {
+public:
+  virtual ~Logger() = default;
+
+  static std::unique_ptr<Logger> create_stdio();
+  // Can return nullptr, will write reason to fallback.
+  static std::unique_ptr<Logger> create_file(std::filesystem::path const& path,
+                                             Logger* fallback);
+  static std::unique_ptr<Logger> create_syslog(std::string const& prgname);
+  static std::unique_ptr<Logger> create_null();
+
+  virtual void err(char const* format, ...)
+#if HAVE_ATTRIBUTE_FORMAT
+    __attribute__((format(printf, 2, 3)))  // this takes up 1
+#endif  // HAVE_ATTRIBUTE_FORMAT
+    = 0;
+
+  virtual void warn(char const* format, ...)
+#if HAVE_ATTRIBUTE_FORMAT
+    __attribute__((format(printf, 2, 3)))
+#endif  // HAVE_ATTRIBUTE_FORMAT
+    = 0;
+
+  virtual void info(char const* format, ...)
+#if HAVE_ATTRIBUTE_FORMAT
+    __attribute__((format(printf, 2, 3)))
+#endif  // HAVE_ATTRIBUTE_FORMAT
+    = 0;
+
+#ifdef NDEBUG
+  void dbg(char const* format, ...)
+#if HAVE_ATTRIBUTE_FORMAT
+    __attribute__((format(printf, 2, 3)))
+#endif  // HAVE_ATTRIBUTE_FORMAT
+  {}
+#else
+  virtual void dbg(char const* format, ...)
+#if HAVE_ATTRIBUTE_FORMAT
+    __attribute__((format(printf, 2, 3)))
+#endif  // HAVE_ATTRIBUTE_FORMAT
+    = 0;
+#endif
+
+protected:
+  Logger() = default;
+  Logger(Logger const&) = delete;
+  Logger& operator=(Logger const&) = delete;
+};
+
+#endif  // LOGGER_HH