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#include "../cpp/nissy.h"
#include "storage.h"
#include <emscripten.h>
#include <emscripten/bind.h>
#include <map>
#include <set>
#include <string>
#include <vector>
EM_ASYNC_JS(void, fake_async, (), {});
extern "C" {
extern int addCallbackFunction(/* args intentionally unspecified */);
extern void callFunction(int, const char *);
extern int callFunctionInt(int);
}
static int logger_id = -1;
void log(std::string s)
{
if (logger_id == -1)
return;
callFunction(logger_id, s.c_str());
}
void log_wrapper(const char *cstr, void *data)
{
log(cstr);
}
void set_logger(int id)
{
logger_id = id;
nissy::set_logger(log_wrapper, NULL);
}
// Some of the solvers are not available to the JS interface because of
// memory limitations.
const std::set<std::string> available_solvers
{
"h48h0k4",
"h48h1k2",
"h48h2k2",
"h48h3k2",
"h48h7k2",
};
std::map<std::string, nissy::solver> loaded_solvers;
// TODO: this should ask the user if they want to download or generate.
bool init_solver(const std::string& name)
{
auto se = nissy::solver::get(name);
nissy::solver solver = std::get<nissy::solver>(se);
solver.data.resize(solver.size);
if (storage::read(solver.id, solver.size,
reinterpret_cast<char *>(solver.data.data()))) {
log("Data for solver " + solver.name + " read from storage\n");
} else {
log("Could not read data for solver " + solver.name +
" from storage, generating it\n");
auto err = solver.generate_data();
if (!err.ok()) {
log("Error generating the data!\n");
return false;
}
}
log("Checking data integrity "
"(this is done only once per session per solver)...\n");
if (!solver.check_data().ok()) {
log("Error! Data is corrupted!\n");
return false;
}
loaded_solvers.insert({name, solver});
if (storage::write(solver.id, solver.size,
reinterpret_cast<const char *>(solver.data.data()))) {
log("Data for solver " + solver.name + " stored\n");
} else {
log("Error storing the data (the solver is usable, "
"but the data will have to be re-generated next "
"time you want to use it)");
}
return true;
}
bool solver_valid(const std::string& name)
{
if (loaded_solvers.contains(name) ||
(available_solvers.contains(name) && init_solver(name)))
return true;
auto se = nissy::solver::get(name);
if (std::holds_alternative<nissy::solver>(se))
log("The solver " + name + " is not available in "
"the web version of Nissy. Use a native version.\n");
else
log("Invalid solver " + name + "\n");
return false;
}
int poll_status(void *arg)
{
if (arg == NULL || *(int *)arg == -1)
return nissy::status::RUN.value;
return callFunctionInt(*(int *)arg);
}
nissy::solver::solve_result solve(std::string name,
nissy::cube cube, nissy::nissflag nissflag, unsigned minmoves,
unsigned maxmoves, unsigned maxsols, unsigned optimal, unsigned threads,
int poll_status_id)
{
// Here we use a dirty trick to make this function always return the
// same kind of JavaScript object. If we did not do this, the returned
// object would be a Promise on the first run of the solver for each
// session (because when loading the table some async JS code is
// called), and a regular object otherwise.
// TODO figure out if there is a better way to do this.
fake_async();
if (!solver_valid(name))
return nissy::solver::solve_result
{.err = nissy::error::INVALID_SOLVER};
return loaded_solvers.at(name).solve(cube, nissflag, minmoves,
maxmoves, maxsols, optimal, threads, NULL, &poll_status_id);
}
EMSCRIPTEN_BINDINGS(Nissy)
{
emscripten::class_<nissy::nissflag>("NissFlag")
.class_property("normal", &nissy::nissflag::NORMAL)
.class_property("inverse", &nissy::nissflag::INVERSE)
.class_property("mixed", &nissy::nissflag::MIXED)
.class_property("linear", &nissy::nissflag::LINEAR)
.class_property("all", &nissy::nissflag::ALL)
;
emscripten::class_<nissy::error>("Error")
.function("ok", &nissy::error::ok)
.class_property("unsolvableWarning", &nissy::error::UNSOLVABLE_WARNING)
.class_property("unsolvableError", &nissy::error::UNSOLVABLE_ERROR)
.class_property("invalidCube", &nissy::error::INVALID_CUBE)
.class_property("invalidMoves", &nissy::error::INVALID_MOVES)
.class_property("invalidTrans", &nissy::error::INVALID_TRANS)
.class_property("invalidSolver", &nissy::error::INVALID_SOLVER)
.class_property("nullPointer", &nissy::error::NULL_POINTER)
.class_property("bufferSize", &nissy::error::BUFFER_SIZE)
.class_property("data", &nissy::error::DATA)
.class_property("options", &nissy::error::OPTIONS)
.class_property("unknown", &nissy::error::UNKNOWN)
;
emscripten::constant("statusRUN", nissy::status::RUN.value);
emscripten::constant("statusSTOP", nissy::status::STOP.value);
emscripten::constant("statusPAUSE", nissy::status::PAUSE.value);
emscripten::class_<nissy::status>("Status")
.class_property("run", &nissy::status::RUN)
.class_property("stop", &nissy::status::STOP)
.class_property("pause", &nissy::status::PAUSE)
;
emscripten::class_<nissy::cube>("Cube")
.constructor<>()
.function("move", &nissy::cube::move)
.function("transform", &nissy::cube::transform)
.function("invert", &nissy::cube::invert)
.function("toString", &nissy::cube::to_string)
;
emscripten::class_<nissy::solver::solve_result>("SolveResult")
.property("err", &nissy::solver::solve_result::err)
.property("solutions", &nissy::solver::solve_result::solutions)
;
emscripten::function("countMoves", &nissy::count_moves);
emscripten::function("solve", &solve,
emscripten::return_value_policy::take_ownership());
emscripten::function("setLogger", &set_logger,
emscripten::allow_raw_pointers());
emscripten::function("addCallbackFunction", &addCallbackFunction);
}
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