Initial implementation of configuration snapshotting.

xs/src/slic3r/Config/Version.hpp

@@ -0,0 +1,75 @@
+#ifndef slic3r_GUI_ConfigIndex_
+#define slic3r_GUI_ConfigIndex_
+
+#include <string>
+#include <vector>
+
+#include "../../libslic3r/FileParserError.hpp"
+#include "../Utils/Semver.hpp"
+
+namespace Slic3r { 
+namespace GUI {
+namespace Config {
+
+// Configuration bundle version.
+struct Version
+{
+	// Version of this config.
+	Semver 		config_version     = Semver::invalid();
+	// Minimum Slic3r version, for which this config is applicable.
+	Semver 		min_slic3r_version = Semver::zero();
+	// Maximum Slic3r version, for which this config is recommended.
+	// Slic3r should read older configuration and upgrade to a newer format,
+	// but likely there has been a better configuration published, using the new features.
+	Semver 		max_slic3r_version = Semver::inf();
+	// Single comment line.
+	std::string comment;
+
+	bool 		is_slic3r_supported(const Semver &slicer_version) const { return slicer_version.in_range(min_slic3r_version, max_slic3r_version); }
+	bool 		is_current_slic3r_supported() const;
+};
+
+// Index of vendor specific config bundle versions and Slic3r compatibilities.
+// The index is being downloaded from the internet, also an initial version of the index 
+// is contained in the Slic3r installation.
+// 
+// The index has a simple format:
+//
+// min_sic3r_version = 
+// max_slic3r_version = 
+// config_version "comment"
+// config_version "comment"
+// ...
+// min_slic3r_version = 
+// max_slic3r_version = 
+// config_version comment
+// config_version comment
+// ...
+//
+// The min_slic3r_version, max_slic3r_version keys are applied to the config versions below,
+// empty slic3r version means an open interval.
+class Index
+{
+public:
+	typedef std::vector<Version>::const_iterator const_iterator;
+	// Read a config index file in the simple format described in the Index class comment.
+	// Throws Slic3r::file_parser_error and the standard std file access exceptions.
+	size_t						load(const std::string &path);
+
+	const_iterator				begin()   const { return m_configs.begin(); }
+	const_iterator				end()     const { return m_configs.end(); }
+	const std::vector<Version>& configs() const { return m_configs; }
+	// Finds a recommended config to be installed for the current Slic3r version.
+	// Returns configs().end() if such version does not exist in the index. This shall never happen
+	// if the index is valid.
+	const_iterator				recommended() const;
+
+private:
+	std::vector<Version>		m_configs;
+};
+
+} // namespace Config
+} // namespace GUI
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_ConfigIndex_ */