Travel3: Simple image and video display site

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

1 files changed, 67 insertions, 0 deletions

diff --git a/src/image.hh b/src/image.hh
new file mode 100644
index 0000000..b9644b7
--- /dev/null
+++ b/src/image.hh
@@ -0,0 +1,67 @@
+#ifndef IMAGE_HH
+#define IMAGE_HH
+
+#include "date.hh"
+#include "location.hh"
+#include "rotation.hh"
+
+#include <filesystem>
+#include <memory>
+
+class RoBuffer;
+
+class Image {
+public:
+  virtual ~Image() = default;
+
+  class Thumbnail {
+  public:
+    virtual ~Thumbnail() = default;
+
+    virtual std::string_view mime_type() const = 0;
+    virtual uint64_t size() const = 0;
+
+  protected:
+    Thumbnail() = default;
+  };
+
+  static std::unique_ptr<Image> load(std::filesystem::path const& path);
+
+  virtual uint64_t width() const = 0;
+  virtual uint64_t height() const = 0;
+  virtual Location location() const = 0;
+  virtual Rotation rotation() const = 0;
+  virtual Date date() const = 0;
+
+  virtual Thumbnail* thumbnail() const = 0;
+
+protected:
+  Image() = default;
+  Image(Image const&) = delete;
+  Image& operator=(Image const&) = delete;
+};
+
+class ThumbnailReader {
+public:
+  virtual ~ThumbnailReader() = default;
+
+  static std::unique_ptr<ThumbnailReader> create();
+
+  enum class Return {
+    NEED_MORE,  // Call drain() again if you want data.
+    DONE,  // Data is available, no need to call drain() again.
+    ERR,  // Error, no data will ever be available.
+  };
+
+  virtual Return drain(RoBuffer* in, size_t* bytes = nullptr) = 0;
+
+  // Returns empty until drain() returns Return::DONE.
+  virtual std::string_view data() const = 0;
+
+protected:
+  ThumbnailReader() = default;
+  ThumbnailReader(ThumbnailReader const&) = delete;
+  ThumbnailReader& operator=(ThumbnailReader const&) = delete;
+};
+
+#endif  // IMAGE_HH