limboai/blackboard/blackboard.cpp

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/**
* blackboard.cpp
* =============================================================================
* Copyright 2021-2024 Serhii Snitsaruk
*
* Use of this source code is governed by an MIT-style
* license that can be found in the LICENSE file or at
* https://opensource.org/licenses/MIT.
* =============================================================================
*/
#include "blackboard.h"
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#ifdef LIMBOAI_MODULE
#include "core/variant/variant.h"
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#include "scene/main/node.h"
#endif // LIMBOAI_MODULE
#ifdef LIMBOAI_GDEXTENSION
#include <godot_cpp/classes/node.hpp>
#include <godot_cpp/classes/ref.hpp>
#include <godot_cpp/classes/ref_counted.hpp>
#include <godot_cpp/core/object.hpp>
using namespace godot;
#endif
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Ref<Blackboard> Blackboard::top() const {
Ref<Blackboard> bb(this);
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while (bb->get_parent().is_valid()) {
bb = bb->get_parent();
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}
return bb;
}
Variant Blackboard::get_var(const StringName &p_name, const Variant &p_default, bool p_complain) const {
if (data.has(p_name)) {
return data.get(p_name).get_value();
} else if (parent.is_valid()) {
return parent->get_var(p_name, p_default);
} else {
if (p_complain) {
ERR_PRINT(vformat("Blackboard: Variable \"%s\" not found.", p_name));
}
return p_default;
}
}
void Blackboard::set_var(const StringName &p_name, const Variant &p_value) {
if (data.has(p_name)) {
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// Not checking type - allowing duck-typing.
data[p_name].set_value(p_value);
} else {
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BBVariable var(p_value.get_type());
var.set_value(p_value);
data.insert(p_name, var);
}
}
bool Blackboard::has_var(const StringName &p_name) const {
return data.has(p_name) || (parent.is_valid() && parent->has_var(p_name));
}
void Blackboard::erase_var(const StringName &p_name) {
data.erase(p_name);
}
void Blackboard::bind_var_to_property(const StringName &p_name, Object *p_object, const StringName &p_property) {
ERR_FAIL_COND_MSG(!data.has(p_name), "Blackboard: Binding failed - can't bind variable that doesn't exist.");
data[p_name].bind(p_object, p_property);
}
void Blackboard::unbind_var(const StringName &p_name) {
ERR_FAIL_COND_MSG(data.has(p_name), "Blackboard: Can't unbind variable that doesn't exist.");
data[p_name].unbind();
}
void Blackboard::add_var(const StringName &p_name, const BBVariable &p_var) {
ERR_FAIL_COND(data.has(p_name));
data.insert(p_name, p_var);
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}
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void Blackboard::prefetch_nodepath_vars(Node *p_node) {
ERR_FAIL_COND(p_node == nullptr);
for (const KeyValue<StringName, BBVariable> &kv : data) {
BBVariable var = kv.value;
if (var.get_value().get_type() == Variant::NODE_PATH) {
Node *fetched_node = p_node->get_node_or_null(var.get_value());
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if (fetched_node != nullptr) {
var.set_value(fetched_node);
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}
}
}
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}
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void Blackboard::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_var", "var_name", "default", "complain"), &Blackboard::get_var, Variant(), true);
ClassDB::bind_method(D_METHOD("set_var", "var_name", "value"), &Blackboard::set_var);
ClassDB::bind_method(D_METHOD("has_var", "var_name"), &Blackboard::has_var);
ClassDB::bind_method(D_METHOD("set_parent", "blackboard"), &Blackboard::set_parent);
ClassDB::bind_method(D_METHOD("get_parent"), &Blackboard::get_parent);
ClassDB::bind_method(D_METHOD("erase_var", "var_name"), &Blackboard::erase_var);
ClassDB::bind_method(D_METHOD("prefetch_nodepath_vars", "node"), &Blackboard::prefetch_nodepath_vars);
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ClassDB::bind_method(D_METHOD("top"), &Blackboard::top);
ClassDB::bind_method(D_METHOD("bind_var_to_property", "var_name", "object", "property"), &Blackboard::bind_var_to_property);
ClassDB::bind_method(D_METHOD("unbind_var", "var_name"), &Blackboard::unbind_var);
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}