Add skeleton CountryRelationManager

Change `DiplomaticAction::Argument` to refer to `CountryInstance*` instead of `Country*`
Add `GameManager&` argument to `DiplomaticActionManager::setup_diplomatic_actions`
Add some ErrorMacros, likely and unlikely macros and stringization macros (based on Godot's macros)
Implement `increase_relations` DiplomaticAction commit function
Implement `decrease_relations` DiplomaticAction commit function
Fix include StringUtils.hpp errors

1 files changed, 53 insertions, 0 deletions

diff --git a/src/openvic-simulation/diplomacy/CountryRelation.cpp b/src/openvic-simulation/diplomacy/CountryRelation.cpp
new file mode 100644
index 0000000..d07739c
--- /dev/null
+++ b/src/openvic-simulation/diplomacy/CountryRelation.cpp
@@ -0,0 +1,53 @@
+#include "CountryRelation.hpp"
+
+#include <cassert>
+
+#include "openvic-simulation/country/CountryInstance.hpp"
+#include "openvic-simulation/utility/ErrorMacros.hpp"
+
+using namespace OpenVic;
+
+CountryRelationInstanceProxy::CountryRelationInstanceProxy(std::string_view id) : country_id { id } {}
+
+CountryRelationInstanceProxy::CountryRelationInstanceProxy(CountryInstance const* country)
+	: country_id { country->get_base_country()->get_identifier() } {}
+
+CountryRelationInstanceProxy::operator std::string_view() const {
+	return country_id;
+}
+
+CountryRelationManager::CountryRelationManager(/* TODO: Country Instance Manager Reference */) {}
+
+bool CountryRelationManager::add_country(CountryRelationInstanceProxy country) {
+	// TODO: iterate through Country Instances adding country to every previously existing country_relations
+	return true;
+}
+
+bool CountryRelationManager::remove_country(CountryRelationInstanceProxy country) {
+	// TODO: iterate through country_relations removing every pair that references the country's id
+	return true;
+}
+
+country_relation_value_t CountryRelationManager::get_country_relation(
+	CountryRelationInstanceProxy country, CountryRelationInstanceProxy recepient
+) const {
+	auto it = country_relations.find({ country.country_id, recepient.country_id });
+	OV_ERR_FAIL_COND_V(it == country_relations.end(), 0);
+	return it->second;
+}
+
+country_relation_value_t*
+CountryRelationManager::get_country_relation_ptr(CountryRelationInstanceProxy country, CountryRelationInstanceProxy recepient) {
+	auto it = country_relations.find({ country.country_id, recepient.country_id });
+	OV_ERR_FAIL_COND_V(it == country_relations.end(), nullptr);
+	return &it.value();
+}
+
+bool CountryRelationManager::set_country_relation(
+	CountryRelationInstanceProxy country, CountryRelationInstanceProxy recepient, country_relation_value_t value
+) {
+	auto it = country_relations.find({ country.country_id, recepient.country_id });
+	OV_ERR_FAIL_COND_V(it == country_relations.end(), false);
+	it.value() = value;
+	return true;
+}