add dialogue and cutscene system

src/dialogue/DialogueRuntime.h

@@ -0,0 +1,81 @@
+#pragma once
+
+#include "dialogue/DialogueDatabase.h"
+#include "external/nlohmann/json.hpp"
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+namespace ZL::Dialogue {
+
+class DialogueRuntime {
+public:
+	using json = nlohmann::json;
+
+	void setDatabase(const DialogueDatabase* value);
+
+	bool startDialogue(const std::string& dialogueId);
+	void stop();
+
+	void update(int deltaMs);
+
+	bool isActive() const { return mode != Mode::Inactive; }
+	bool isInChoice() const { return mode == Mode::WaitingForChoice; }
+	bool isPlayingCutscene() const { return mode == Mode::PlayingCutscene; }
+
+	void confirmAdvance();
+	void moveSelection(int delta);
+
+	const PresentationModel& getPresentation() const { return presentation; }
+
+	void setFlag(const std::string& name, int value);
+	int getFlag(const std::string& name) const;
+
+	json buildSaveState() const;
+	bool restoreSaveState(const json& state);
+
+private:
+	enum class Mode {
+		Inactive,
+		PresentingLine,
+		WaitingForChoice,
+		PlayingCutscene
+	};
+
+	const DialogueDatabase* database = nullptr;
+	const DialogueDefinition* activeDialogue = nullptr;
+	const StaticCutsceneDefinition* activeCutscene = nullptr;
+
+	std::unordered_map<std::string, int> flags;
+	std::unordered_set<std::string> consumedChoices;
+
+	std::string currentNodeId;
+	std::string pendingNodeAfterCutscene;
+
+	std::vector<Choice> visibleChoices;
+	PresentationModel presentation;
+	Mode mode = Mode::Inactive;
+
+	int selectedChoice = 0;
+	float revealCharacters = 0.0f;
+	float revealSpeedCharsPerSecond = 52.0f;
+	
+	int currentCutsceneLine = -1;
+	int cutsceneTimerMs = 0;
+
+	bool evaluateConditions(const std::vector<Condition>& conditions) const;
+	void applyEffects(const std::vector<Effect>& effects);
+
+	bool enterNode(const std::string& nodeId);
+	void presentLine(const Node& node);
+	void presentChoices(const Node& node);
+	void startCutscene(const std::string& cutsceneId, const std::string& nextNodeAfterCutscene);
+
+	void advanceCutsceneLine();
+	void refreshCutscenePresentation();
+
+	static int computeFallbackCutsceneDurationMs(const std::string& text);
+};
+
+} // namespace ZL::Dialogue