implement unlock dependencies

src/lib/sim/Simulation.h

@@ -215,6 +215,12 @@ private:
     std::set<std::string> getUnlockedShipSchematicIds() const;
     std::set<std::string> getUnlockedModuleSchematicIds() const;
 
+    // True if schematicId names a currently explicitly-unlocked ship, module, or
+    // assembler recipe schematic (REQ-LOCK-PREREQ satisfaction basis).
+    bool isSchematicIdExplicitlyUnlocked(const std::string& schematicId) const;
+    // True if every prerequisite in unlockRequires is explicitly unlocked (REQ-LOCK-PREREQ).
+    bool prerequisitesSatisfied(const std::vector<std::string>& unlockRequires) const;
+
     // Display names (deduplicated, alphabetical) of output items of recipes in
     // hypothetical.recipeIds that are not yet in m_unlockedRecipeIds.
     std::vector<std::string> computeNewlyUnlockedItemNames(const UnlockedSets& hypothetical) const;