katja: Show only updates

include/katja/database.hpp

@@ -20,10 +20,10 @@ namespace katja
         static database_package create_database_package(const std::string& fullname);
 
     public:
-        const std::string build_tag;
-        const std::string architecture;
-        const std::string version;
         const std::string name;
+        const std::string version;
+        const std::string architecture;
+        const std::string build_tag;
 
         database_package(const std::string& fullname);
 
@@ -33,5 +33,7 @@ namespace katja
         std::string to_string() const;
     };
 
-    std::multimap<std::string, database_package> read_installed_database();
+    using package_database = std::multimap<std::string, database_package>;
+
+    package_database read_installed_database();
 }

include/katja/repository.hpp

@@ -5,6 +5,26 @@
  */
 #pragma once
 
+#include <string>
+#include <vector>
+
+#include "katja/database.hpp"
+
 namespace katja
 {
+    struct package_identifier
+    {
+        const std::string name;
+        const std::string version;
+        const std::string architecture;
+        const std::string data;
+
+        std::string to_string() const;
+    };
+
+    class repository
+    {
+    public:
+        virtual std::vector<package_identifier> get_updates(const package_database& database) = 0;
+    };
 }

include/katja/sbo.hpp

@@ -10,6 +10,8 @@
 #include <filesystem>
 #include <optional>
 
+#include "katja/repository.hpp"
+
 namespace katja
 {
     struct info_file
@@ -24,6 +26,18 @@ namespace katja
                 const std::string homepage, const std::string& email, const std::string& maintainer);
     };
 
+    class sbo_repository final : public repository
+    {
+        std::map<std::string, std::filesystem::path> info_paths;
+
+    public:
+        sbo_repository(const std::filesystem::path& repository_path);
+
+        std::vector<package_identifier> get_updates(const package_database& database) override;
+    };
+
     std::optional<info_file> read_slackbuild_info(const std::filesystem::path& info_filepath);
     void search_for_slackbuilds(std::vector<info_file>& info_files, const std::filesystem::path& directory);
+    void search_for_slackbuilds(std::map<std::string, std::filesystem::path>& info_files,
+            const std::filesystem::path& directory);
 }