Public release of the DLU server code!

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dGame/dMission/MissionPrerequisites.h

@@ -0,0 +1,58 @@
+#pragma once
+#include <vector>
+#include <string>
+#include <map>
+
+#include "Mission.h"
+
+/**
+ * An expression that checks if a mission may be accepted or not
+ */
+class PrerequisiteExpression final
+{
+	bool m_or;
+	uint32_t a;
+	uint32_t sub;
+	PrerequisiteExpression* b;
+
+public:
+    /**
+     * Executes the prerequisite, checking its contents and returning whether or not the mission may be accepted
+     * @param missions the list of missions to check the prerequisites against (f.e. whether they're completed)
+     * @return whether or not all the prerequisites are met
+     */
+	bool Execute(const std::unordered_map<uint32_t, Mission*>& missions) const;
+
+	explicit PrerequisiteExpression(const std::string& str);
+	~PrerequisiteExpression();
+};
+
+/**
+ * Utility class for checking whether or not a mission can be accepted using its prerequisites
+ */
+class MissionPrerequisites final
+{
+public:
+    /**
+     * Checks whether or not the mission identified by the specified ID can be accepted based on the mission inventory passed.
+     * Also performs checks for daily missions (e.g. if the time out is valid).
+     * @param missionId the mission ID to check prerequisites for
+     * @param missions the mission inventory to check the prerequisites against
+     * @return whether or not the mission identified by the specified ID can be accepted
+     */
+	static bool CanAccept(uint32_t missionId, const std::unordered_map<uint32_t, Mission*>& missions);
+private:
+
+    /**
+     * Cache of all the executed prerequisites
+     */
+	static std::unordered_map<uint32_t, PrerequisiteExpression*> expressions;
+
+    /**
+     * Checks the prerequisites for a mission
+     * @param missionId the mission ID to check prerequisites for
+     * @param missions the mission inventory to check the prerequisites against
+     * @return whether or not the mission identified by the specified ID can be accepted
+     */
+    static bool CheckPrerequisites(uint32_t missionId, const std::unordered_map<uint32_t, Mission*>& missions);
+};