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#include "signal.hpp"
#include "task.hpp"
using namespace std;
using namespace flat::core;
bool channel::sig_prior_cmp::operator()(const signal& s, const signal& g) const
{
return s.prior <= g.prior;
}
map<string, channel*> channel::channels;
channel::channel(const string& id, task::priority prior)
{
channel * other = find_channel(id);
if (!other)
//TODO throw exception
;
/* Initialize task, post-process, fifth priority */
checker = new task<channel>( this,
&channel::post_processing,
0,
prior);
string ID = (id.empty()) ? object::random_id() : id;
set_id(ID);
channels.insert(pair<string, channel*>(ID, this));
}
channel::~channel()
{
channels.erase(get_id());
/* Finalize task */
delete checker;
}
void channel::emit(const signal& sig)
{
if (!sig.priority) {
/* Execute immediately */
for (auto listener_s : listener_ss)
listener_s->execute(sig);
} else
/* Insert in order of priority */
stack.insert(sig);
}
void channel::connect(listener_s* l)
{
/* Control not to double */
for (auto listener_s : listener_ss)
{
if (listener_s == l)
return;
}
listener_ss.push_back(l);
}
void channel::disconnect(listener_s* l)
{
listener_ss.remove(l);
}
channel * channel::findChannel(const string& id)
{
if (id.empty())
return 0;
auto it = channels.find(id);
return (it == channels.end()) ? 0 : (*it).second;
}
void channel::post_processing(void*)
{
if (!stack.empty()) {
/* for each listener_s, catch signal */
for (const auto& signal : stack)
{
for (auto listener_s : listener_ss)
listener_s->execute(signal);
}
stack.clear();
}
}
/* signal class */
signal::signal(FlatObject *sender, const string& id, void *data, Uint8 priority)
: sender(sender), data(data), priority(priority)
{
set_id(id);
}
bool signal::emit(const string& channel) const
{
channel * chan = channel::find_channel(channel);
if (!chan)
return false;
/* Finally emit in channel */
chan->emit(*this);
return true;
}
/* listener_s class */
listener_s::listener_s(const initializer_list<string>& filters)
: filters(filters) {}
bool listener_s::check_in_filters(const std::string& filter) const
{
for (const auto& f : filters)
{
if (filter == f)
return true;
}
return false;
}
void listener_s::add_filter(const std::string& f)
{
filters.push_back(f);
}
void listener_s::remove_filter(const std::string& f)
{
filters.remove(f);
}
bool listener_s::connect(const std::string& chan)
{
channel * c = channel::find_channel(chan);
if (!c)
c->connect(this);
return c != 0;
}
bool listener_s::disconnect(const std::string& chan)
{
channel * c = channel::find_channel(chan);
if (!c)
c->connect(this);
return c != 0;
}
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