TITANIC: Implement overall game saving code

5 files changed, 160 insertions, 9 deletions

diff --git a/engines/titanic/compressed_file.h b/engines/titanic/compressed_file.h
index 56e2c23343..cd9cf8377d 100644
--- a/engines/titanic/compressed_file.h
+++ b/engines/titanic/compressed_file.h
@@ -68,7 +68,7 @@ private:
 
 	int sub1(Method3Fn fn, int v);
 
-	void sub2();
+	void sub2() {}
 public:
 	Decompressor();
 
diff --git a/engines/titanic/objects/project_item.cpp b/engines/titanic/objects/project_item.cpp
index 90f85d97b9..e75f0e01e9 100644
--- a/engines/titanic/objects/project_item.cpp
+++ b/engines/titanic/objects/project_item.cpp
@@ -27,7 +27,15 @@
 
 namespace Titanic {
 
-void CProjectItem::load(int id) {
+void CProjectItem::save(SimpleFile *file, int indent) const {
+	error("TODO");
+}
+
+void CProjectItem::load(SimpleFile *file) {
+	error("TODO");
+}
+
+void CProjectItem::loadGame(int slotId) {
 	CompressedFile file;
 	Common::InSaveFile *saveFile = nullptr;
 
@@ -35,16 +43,28 @@ void CProjectItem::load(int id) {
 	clear();
 
 	// Open either an existing savegame slot or the new game template
-	if (id > 0) {
+	if (slotId > 0) {
 		saveFile = g_system->getSavefileManager()->openForLoading(
-			Common::String::format("slot%d.gam", id));
+			Common::String::format("slot%d.gam", slotId));
 		file.open(saveFile);
 	} else {
 		file.open("newgame.st");
 	}
 
 	// Load the contents in
-	loadData(file);
+	loadData(&file);
+
+	file.close();
+}
+
+void CProjectItem::saveGame(int slotId) {
+	CompressedFile file;
+	Common::OutSaveFile *saveFile = g_system->getSavefileManager()->openForSaving(
+		Common::String::format("slot%d.gam", slotId));
+	file.open(saveFile);
+
+	// Save the contents out
+	saveData(&file, this);
 
 	file.close();
 }
@@ -53,8 +73,33 @@ void CProjectItem::clear() {
 
 }
 
-void CProjectItem::loadData(SimpleFile &file) {
+void CProjectItem::loadData(SimpleFile *file) {
 
 }
 
+void CProjectItem::saveData(SimpleFile *file, CTreeItem *item) const {
+	while (item) {
+		item->saveHeader(file, 0);
+		item->save(file, 1);
+		item->saveFooter(file, 0);
+
+	
+		CTreeItem *child = item->getFirstChild();
+		if (child) {
+			file->write("\n{\n", 3);
+			file->writeQuotedString("DOWN");
+			file->write("\n}\n", 3);
+			saveData(file, child);
+			file->write("\n{\n", 3);
+			file->writeQuotedString("UP");
+		} else {
+			file->write("\n{\n", 3);
+			file->writeQuotedString("ALONG");
+		}
+		
+		file->write("\n}\n", 3);
+		item = item->getNextSibling();
+	}
+}
+
 } // End of namespace Titanic
diff --git a/engines/titanic/objects/project_item.h b/engines/titanic/objects/project_item.h
index 93f6e17ef0..6277af85c3 100644
--- a/engines/titanic/objects/project_item.h
+++ b/engines/titanic/objects/project_item.h
@@ -34,12 +34,37 @@ private:
 	/**
 	 * Load project data from the passed file
 	 */
-	void loadData(SimpleFile &file);
+	void loadData(SimpleFile *file);
+
+	/**
+	 * Save project data to the passed file
+	 */
+	void saveData(SimpleFile *file, CTreeItem *item) const;
 public:
 	/**
-	 * Load the entire project data for a given Id
+	 * Return the class name
+	 */
+	virtual const char *getClassName() const { return "CProjectItem"; }
+
+	/**
+	 * Save the data for the class to file
+	 */
+	virtual void save(SimpleFile *file, int indent) const;
+
+	/**
+	 * Load the data for the class from file
+	 */
+	virtual void load(SimpleFile *file);	
+
+	/**
+	 * Load the entire project data for a given slot Id
+	 */
+	void loadGame(int slotId);
+
+	/**
+	 * Save the entire project data to a given savegame slot
 	 */
-	void load(int id);
+	void saveGame(int slotId);
 
 	/**
 	 * Clear any currently loaded project
diff --git a/engines/titanic/objects/tree_item.cpp b/engines/titanic/objects/tree_item.cpp
index 06128ce354..dcd0e4606f 100644
--- a/engines/titanic/objects/tree_item.cpp
+++ b/engines/titanic/objects/tree_item.cpp
@@ -24,4 +24,32 @@
 
 namespace Titanic {
 
+CTreeItem::CTreeItem() : _parent(nullptr), _firstChild(nullptr),
+	_nextSibling(nullptr), _priorSibling(nullptr), _field14(0) {
+}
+
+void CTreeItem::save(SimpleFile *file, int indent) const {
+	file->writeNumberLine(0, indent);
+	CMessageTarget::save(file, indent);
+}
+
+void CTreeItem::load(SimpleFile *file) {
+	file->readNumber();
+	CMessageTarget::load(file);
+}
+
+CTreeItem *CTreeItem::getLastSibling() {
+	CTreeItem *item = this;
+	while (item->getNextSibling())
+		item = item->getNextSibling();
+
+	return item;
+}
+
+CTreeItem *CTreeItem::getLastChild() {
+	if (!_firstChild)
+		return nullptr;
+	return _firstChild->getLastSibling();
+}
+
 } // End of namespace Titanic
diff --git a/engines/titanic/objects/tree_item.h b/engines/titanic/objects/tree_item.h
index 170a0e905d..454c3ca8ca 100644
--- a/engines/titanic/objects/tree_item.h
+++ b/engines/titanic/objects/tree_item.h
@@ -28,6 +28,59 @@
 namespace Titanic {
 
 class CTreeItem: public CMessageTarget {
+private:
+	CTreeItem *_parent;
+	CTreeItem *_nextSibling;
+	CTreeItem *_priorSibling;
+	CTreeItem *_firstChild;
+	int _field14;
+public:
+	CTreeItem();
+
+	/**
+	 * Return the class name
+	 */
+	virtual const char *getClassName() const { return "CTreeItem"; }
+
+	/**
+	 * Save the data for the class to file
+	 */
+	virtual void save(SimpleFile *file, int indent) const;
+
+	/**
+	 * Load the data for the class from file
+	 */
+	virtual void load(SimpleFile *file);
+
+	/**
+	 * Get the parent for the given item
+	 */
+	CTreeItem *getParent() const { return _parent; }
+
+	/**
+	 * Get the next sibling
+	 */
+	CTreeItem *getNextSibling() { return _nextSibling; }
+
+	/**
+	 * Get the prior sibling
+	 */
+	CTreeItem *getPriorSibling() { return _priorSibling; }
+
+	/**
+	 * Get the last sibling of this sibling
+	 */
+	CTreeItem *getLastSibling();
+
+	/**
+	 * Get the first child of the item, if any
+	 */
+	CTreeItem *getFirstChild() { return _firstChild; }
+
+	/**
+	 * Get the last child of the item, if any
+	 */
+	CTreeItem *getLastChild();
 };
 
 } // End of namespace Titanic