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#include <emscripten/bind.h>
#include <emscripten/val.h>
#include <emscripten.h>
#include <cstdio>
#include <string>
#include <memory>
#include <array>
#include "models/timer.hpp"
#include "models/counter.hpp"
#include "utils/utils.hpp"
using emval = emscripten::val;
thread_local const emval document = emval::global("document");
class TimerView {
public:
/*
* Timer
*/
void timer_display_text(std::string const & text) {
set_inner_text_by_id("time-display", text);
}
void timer_record_floor(std::string const & text) {
set_inner_text_by_id("record-floor", text);
}
void timer_start_stop_button_label(std::string const & text) {
set_inner_text_by_id("start-stop-btn", text);
}
void timer_clear_reset_button_label(std::string const & text) {
set_inner_text_by_id("clear-reset-btn", text);
}
/*
* Counter
*/
void counter_display_text(uint32_t counter_num, std::string const & counter_text, std::string const & rate_text) {
std::string counter_id = "counter-";
counter_id.append(std::to_string(counter_num));
std::string rate_id = "rate-";
rate_id.append(std::to_string(counter_num));
set_inner_text_by_id(counter_id, counter_text);
set_inner_text_by_id(rate_id, rate_text);
}
void set_clear_reset_button_disabled(bool disabled) {
set_button_disabled("clear-reset-btn", disabled);
}
void play_alarm() {
EM_ASM({
const handle = document.getElementById("sound-handle");
const duration = Math.round(handle.duration * 1000.0);
handle.currentTime = 0;
handle.play().then(() => {
setTimeout(() => {
handle.pause();
}, duration);
});
});
}
private:
static void set_inner_text_by_id(std::string const & id, std::string const & text) {
emval timer_display = document.call<emval>("getElementById", emval(id.c_str()));
timer_display.set("innerText", text.c_str());
}
static void set_button_disabled(std::string const & id, bool disabled) {
emval timer_display = document.call<emval>("getElementById", emval(id.c_str()));
timer_display.set("disabled", disabled);
}
};
class TimerController {
public:
TimerController()
: _counters { FreqCounter(_timer), FreqCounter(_timer) }
, _alarm_sound_triggered(false)
{ }
void handle_inc_time(uint32_t amount) {
_timer.increment_preset_ms(amount * 1000);
_clear_counters_and_alarm();
_update_labels();
}
void handle_start_stop() {
_timer.toggleStart();
_update_labels();
}
void handle_clear_reset() {
if(_clear_reset_btn_clears()) {
clear();
} else {
reset();
}
_update_labels();
}
/*
* Counter
*/
void handle_inc_counter(uint32_t counter_num) {
_counters[counter_num].inc();
// Effects
_update_labels();
_update_counter(counter_num);
}
void handle_timer_update() {
_view.timer_display_text(_timer.counter_display_value());
_view.timer_record_floor(_timer.record_floor_display());
for(size_t i = 0; i < _counters.size(); i++)
_update_counter(i);
if(_timer.overtime() && !_alarm_sound_triggered) {
_view.play_alarm();
_alarm_sound_triggered = true;
}
}
private:
FreqTimer _timer;
TimerView _view;
std::array<FreqCounter, 2> _counters;
bool _alarm_sound_triggered;
void _update_counter(uint32_t counter_num) {
FreqCounter & counter = _counters[counter_num];
std::string count = counter.display_value();
std::string rate = counter.rate_display();
_view.counter_display_text(counter_num, count, rate);
}
bool _clear_reset_btn_clears() const {
return (
_timer.has_preset() and !_timer.started() and
(_counters[0].cnt() == 0 && _counters[1].cnt() == 0)
);
}
void _update_labels() {
// Start / Stop Label
if(_timer.running()) {
_view.timer_start_stop_button_label("Stop");
} else {
_view.timer_start_stop_button_label("Start");
}
// Clear / Reset Button Label
if(_clear_reset_btn_clears()) {
_view.timer_clear_reset_button_label("Clear");
} else {
_view.timer_clear_reset_button_label("Reset");
}
// Disable the clear / reset button when the timer is running
_view.set_clear_reset_button_disabled(_timer.running());
}
void _clear_counters_and_alarm() {
for(FreqCounter & counter : _counters)
counter.reset();
_alarm_sound_triggered = false;
}
void clear() {
_timer.clear();
_clear_counters_and_alarm();
}
void reset() {
_timer.reset();
_clear_counters_and_alarm();
}
};
EMSCRIPTEN_BINDINGS(timer_controller) {
emscripten::class_<TimerController>("TimerController")
.constructor()
.function("handle_start_stop",
&TimerController::handle_start_stop
)
.function("handle_clear_reset",
&TimerController::handle_clear_reset
)
.function("handle_inc_counter",
&TimerController::handle_inc_counter
)
.function("handle_inc_time",
&TimerController::handle_inc_time
)
.function("handle_timer_update",
&TimerController::handle_timer_update
);
}
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