Refactoring: move undo commands to top level

In the future we might want to use undo-commands for mobile as
well (even if not implementing undo).

Therefore, move the undo-command source from desktop-widgets
to their own commands top-level folder.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

commands/command_divesite.h

@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+// Note: this header file is used by the undo-machinery and should not be included elsewhere.
+
+#ifndef COMMAND_DIVESITE_H
+#define COMMAND_DIVESITE_H
+
+#include "command_base.h"
+
+#include <QVector>
+
+// We put everything in a namespace, so that we can shorten names without polluting the global namespace
+namespace Command {
+
+class AddDiveSite : public Base {
+public:
+	AddDiveSite(const QString &name);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	// Note: we only add one dive site. Nevertheless, we use vectors so that we
+	// can reuse the dive site deletion code.
+	// For undo
+	std::vector<dive_site *> sitesToRemove;
+
+	// For redo
+	std::vector<OwningDiveSitePtr> sitesToAdd;
+};
+
+class ImportDiveSites : public Base {
+public:
+	// Note: the dive site table is consumed after the call it will be empty.
+	ImportDiveSites(struct dive_site_table *sites, const QString &source);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	// For undo
+	std::vector<dive_site *> sitesToRemove;
+
+	// For redo
+	std::vector<OwningDiveSitePtr> sitesToAdd;
+};
+
+class DeleteDiveSites : public Base {
+public:
+	DeleteDiveSites(const QVector<dive_site *> &sites);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	// For redo
+	std::vector<dive_site *> sitesToRemove;
+
+	// For undo
+	std::vector<OwningDiveSitePtr> sitesToAdd;
+};
+
+class PurgeUnusedDiveSites : public Base {
+public:
+	PurgeUnusedDiveSites();
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	// For redo
+	std::vector<dive_site *> sitesToRemove;
+
+	// For undo
+	std::vector<OwningDiveSitePtr> sitesToAdd;
+};
+
+class EditDiveSiteName : public Base {
+public:
+	EditDiveSiteName(dive_site *ds, const QString &name);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	QString value; // Value to be set
+};
+
+class EditDiveSiteDescription : public Base {
+public:
+	EditDiveSiteDescription(dive_site *ds, const QString &description);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	QString value; // Value to be set
+};
+
+class EditDiveSiteNotes : public Base {
+public:
+	EditDiveSiteNotes(dive_site *ds, const QString &notes);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	QString value; // Value to be set
+};
+
+
+class EditDiveSiteCountry : public Base {
+public:
+	EditDiveSiteCountry(dive_site *ds, const QString &country);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	QString value; // Value to be set
+};
+
+class EditDiveSiteLocation : public Base {
+public:
+	EditDiveSiteLocation(dive_site *ds, location_t location);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	location_t value; // Value to be set
+};
+
+class EditDiveSiteTaxonomy : public Base {
+public:
+	EditDiveSiteTaxonomy(dive_site *ds, taxonomy_data &taxonomy);
+	~EditDiveSiteTaxonomy(); // free taxonomy
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	taxonomy_data value; // Value to be set
+};
+
+class MergeDiveSites : public Base {
+public:
+	MergeDiveSites(dive_site *ds, const QVector<dive_site *> &sites);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+
+	// For redo
+	std::vector<dive_site *> sitesToRemove;
+
+	// For undo
+	std::vector<OwningDiveSitePtr> sitesToAdd;
+};
+
+} // namespace Command
+
+#endif // COMMAND_DIVESITE_H