From 23196be83778973d9688cc5d465e4e4a16476568 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Thu, 12 Dec 2024 22:45:12 +0100
Subject: add documentation

---
 src/crepe/manager/ReplayManager.h | 52 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 6 deletions(-)

(limited to 'src/crepe/manager/ReplayManager.h')

diff --git a/src/crepe/manager/ReplayManager.h b/src/crepe/manager/ReplayManager.h
index 7be18f3..d3af879 100644
--- a/src/crepe/manager/ReplayManager.h
+++ b/src/crepe/manager/ReplayManager.h
@@ -8,13 +8,14 @@
 
 namespace crepe {
 
-class ReplaySystem;
-
 typedef size_t recording_t;
 
 /**
  * \brief Replay manager
  *
+ * The replay manager is responsible for creating, storing and restoring ComponentManager
+ * snapshots. Sequential snapshots can be recorded and replayed in combination with
+ * ReplaySystem.
  */
 class ReplayManager : public Manager {
 	// TODO: Delete recordings at end of scene
@@ -22,31 +23,70 @@ public:
 	ReplayManager(Mediator & mediator);
 
 public:
+	//! Start a new recording
 	void record_start();
+	/**
+	 * \brief End the latest recording started by \c record_start()
+	 * \returns Handle to recording
+	 */
 	recording_t record_end();
+	/**
+	 * \brief Play a recording
+	 * \param handle Handle to recording (as returned by \c record_end())
+	 */
 	void play(recording_t handle);
+	/**
+	 * \brief Delete a recording from memory
+	 * \param handle Handle to recording (as returned by \c record_end())
+	 */
 	void release(recording_t handle);
 	
 public:
+	//! Internal state
 	enum State {
-		IDLE,
-		RECORDING,
-		PLAYING,
+		IDLE, //!< Not doing anything
+		RECORDING, //!< Currently recording
+		PLAYING, //!< Currently playing back a recording
 	};
+	//! Get current internal state
 	State get_state() const;
 
 public:
+	/**
+	 * \brief Record a single frame to the current recording
+	 *
+	 * This function is called by ReplaySystem after the game programmer has called \c
+	 * record_start()
+	 */
 	void frame_record();
+	/**
+	 * \brief Play the next frame of the current recording
+	 *
+	 * \returns `true` if the recording is finished playing
+	 * \returns `false` if there are more frames
+	 *
+	 * This function also automatically resets the internal state from PLAYING to IDLE at the end
+	 * of a recording.
+	 */
 	bool frame_step();
 
 private:
+	/**
+	 * \brief Recording data
+	 */
 	struct Recording {
+		//! Current frame being shown
 		size_t frame = 0;
+		//! All frames in recording
 		std::vector<ComponentManager::Snapshot> frames;
 	};
+	//! Internal state
 	State state = IDLE;
-	OptionalRef<Recording> recording;
+	//! Current recording handle
 	recording_t id = -1;
+	//! Current recording data
+	OptionalRef<Recording> recording;
+	//! Recording storage
 	std::unordered_map<recording_t, std::unique_ptr<Recording>> memory;
 };
 
-- 
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