1 files changed, 51 insertions, 0 deletions
diff --git a/src/files_finder.hh b/src/files_finder.hh
new file mode 100644
index 0000000..2928efa
--- /dev/null
+++ b/src/files_finder.hh
@@ -0,0 +1,51 @@
+#ifndef FILES_FINDER_HH
+#define FILES_FINDER_HH
+
+#include <memory>
+#include <filesystem>
+
+class Logger;
+class TaskRunner;
+
+class FilesFinder {
+public:
+  class Delegate {
+  public:
+    virtual ~Delegate() = default;
+
+    // Called on any thread, default implementation
+    // returns true for files not hidden.
+    // Depth is counted from root, files in root have depth zero.
+    virtual bool include_file(std::string_view name, uint16_t depth) const;
+
+    // Called on any thread, default implementation
+    // returns true for dirs not hidden.
+    // Depth is counted from root, files in root have depth zero.
+    virtual bool include_dir(std::string_view name, uint16_t depth) const;
+
+    // Called for each file found. Called on runner.
+    virtual void file(std::filesystem::path path) = 0;
+
+    // Called after all files have been found. Called on runner.
+    // Default implementation does nothing.
+    virtual void done();
+
+  protected:
+    Delegate() = default;
+  };
+
+  virtual ~FilesFinder() = default;
+
+  static std::unique_ptr<FilesFinder> create(std::shared_ptr<Logger> logger,
+                                             std::shared_ptr<TaskRunner> runner,
+                                             std::filesystem::path root,
+                                             Delegate* delegate,
+                                             size_t threads = 1);
+
+protected:
+  FilesFinder() = default;
+  FilesFinder(FilesFinder const&) = delete;
+  FilesFinder& operator=(FilesFinder const&) = delete;
+};
+
+#endif  // FILES_HH