1 files changed, 23 insertions, 0 deletions
diff --git a/src/package.h b/src/package.h
index 5ffd060..109f065 100644
--- a/src/package.h
+++ b/src/package.h
@@ -1,6 +1,10 @@
+#pragma once
+
 #include <string>
 #include <optional>
 #include <unordered_map>
+#include <set>
+#include <forward_list>
 
 namespace katja
 {
@@ -23,5 +27,24 @@ namespace katja
         static std::optional<package> parse(const std::string& full_name) noexcept;
     };
 
+    class repository
+    {
+    public:
+        virtual std::unordered_map<std::string, package> list(const std::set<std::string>& package_names) = 0;
+        virtual void refresh() = 0;
+        virtual std::forward_list<std::string> check_dependencies(const std::string& package_name) = 0;
+    };
+
     std::unordered_map<std::string, package> read_package_database();
+
+    class package_exception : public std::exception
+    {
+        std::string m_message;
+
+    public:
+        explicit package_exception(const std::string& package_name, const std::string& reason) noexcept;
+
+        const std::string_view package_name() const noexcept;
+        const char *what() const noexcept override;
+    };
 }