/
exposetags.h
70 lines (55 loc) · 2.55 KB
/
exposetags.h
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#pragma once
#include "string_encoded_array.h"
class ExposesTags
{
public:
bool loaded = false;
virtual void load(threaded_process_status &p_status, abort_callback &p_abort, bool throw_all = false) { loaded = true; }
virtual string_encoded_array get_data(pfc::string8 &tag_name, threaded_process_status &p_status, abort_callback &p_abort) = 0;
virtual ~ExposesTags() {}
};
typedef std::shared_ptr<ExposesTags> ExposesTags_ptr;
template <class T>
class ExposedTags : public virtual ExposesTags
{
protected:
const static std::map<const char*, std::pair<string_encoded_array(T::*)()const, void(T::*)(threaded_process_status&, abort_callback&, bool)>, cmp_str> exposed_tags;
public:
static std::map<const char*, std::pair<string_encoded_array(ExposedTags::*)()const, void(ExposedTags::*)(threaded_process_status&, abort_callback&, bool)>, cmp_str> create_default_tags_map() {
std::map<const char*, std::pair<string_encoded_array(ExposedTags::*)()const, void(ExposedTags::*)(threaded_process_status&, abort_callback&, bool)>, cmp_str> m;
return m;
}
virtual string_encoded_array get_data(pfc::string8 &tag_name, threaded_process_status &p_status, abort_callback &p_abort) override;
virtual string_encoded_array get_sub_data(pfc::string8 &tag_name, threaded_process_status &p_status, abort_callback &p_abort);
inline bool has_data(pfc::string8 &tag_name) {
return exposed_tags.count(tag_name.get_ptr()) != 0;
}
};
template <class T>
using ExposedPair = std::pair<string_encoded_array(T::*)()const, void(T::*)(threaded_process_status&, abort_callback&, bool)>;
template <class T>
using ExposedMap = std::map<const char*, std::pair<string_encoded_array(T::*)()const, void(T::*)(threaded_process_status&, abort_callback&, bool)>, cmp_str>;
template <class T>
string_encoded_array ExposedTags<T>::get_data(pfc::string8 &tag_name, threaded_process_status &p_status, abort_callback &p_abort) {
auto &it = exposed_tags.find(tag_name.get_ptr());
if (it != exposed_tags.cend()) {
auto pair = it->second;
auto x = std::bind(pair.first, ((T*)this));
auto load_check = pair.second;
if (load_check != nullptr) {
auto load_func = std::bind(pair.second, ((T*)this), std::ref(p_status), std::ref(p_abort), false);
load_func();
}
pfc::string8 out = x();
return out;
}
else {
return get_sub_data(tag_name, p_status, p_abort);
}
}
template <class T>
string_encoded_array ExposedTags<T>::get_sub_data(pfc::string8 &tag_name, threaded_process_status &p_status, abort_callback &p_abort) {
Discogs::missing_data_exception ex;
ex << "Unknown tag: " << tag_name;
throw ex;
}