From 97b5778172572504c8dfbe173b18281e786270c0 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Fri, 25 Apr 2025 16:18:26 +0200
Subject: Initial commit

---
 qt-quick/adapter.cpp | 163 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 qt-quick/adapter.cpp

(limited to 'qt-quick/adapter.cpp')

diff --git a/qt-quick/adapter.cpp b/qt-quick/adapter.cpp
new file mode 100644
index 0000000..9594c56
--- /dev/null
+++ b/qt-quick/adapter.cpp
@@ -0,0 +1,163 @@
+#include "adapter.h"
+
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <vector>
+#include <QDebug>
+#include <QtConcurrent/QtConcurrent>
+
+const std::string tablesdir = "../nissy-core/tables/";
+
+void logWrapper(const char *str, void *data)
+{
+	auto f = *reinterpret_cast<std::function<void(std::string)>*>(data);
+	f(std::string{str});
+}
+
+NissyAdapter::NissyAdapter()
+{
+	// TODO: this list must be kept in sync with UI code, it is a bit ugly
+	std::vector<std::string> solverNames {
+		"h48h0k4",
+		"h48h1k2",
+		"h48h2k2",
+		"h48h3k2",
+		"h48h7k2",
+	};
+
+	for (auto s : solverNames)
+		initSolver(s);
+
+	writeLog = [&](std::string str) {
+		emit appendLog(QString::fromStdString(str));
+	};
+
+	nissy::set_logger(&logWrapper, &writeLog);
+}
+
+void NissyAdapter::initSolver(const std::string& s) {
+	auto se = nissy::solver::get(s);
+	if (std::holds_alternative<nissy::error>(se)) {
+		qDebug("Error loading solver!");
+		return;
+	}
+	auto ss = std::get<nissy::solver>(se);
+	solvers.push_back(ss);
+}
+
+bool NissyAdapter::loadSolverData(nissy::solver& solver) {
+	if (solver.data_checked)
+		return true;
+
+	std::filesystem::path filePath(tablesdir + solver.id);
+	if (!std::filesystem::exists(filePath)) {
+		logLine("Data file for solver " + solver.name + " not found, "
+		    "generating it...");
+		auto err = solver.generate_data();
+		if (!err.ok()) {
+			emit solverError(QString("Error generating data!"));
+			return false;
+		}
+		std::filesystem::create_directory(tablesdir);
+		std::ofstream ofs(filePath, std::ios::binary);
+		ofs.write(reinterpret_cast<char *>(solver.data.data()),
+		    solver.size);
+		ofs.close();
+		logLine("Data generated succesfully");
+	} else {
+		logLine("Reading data for solver " + solver.name +
+		    " from file");
+		std::ifstream ifs(filePath, std::ios::binary);
+		solver.read_data(ifs);
+		ifs.close();
+		logLine("Data loaded");
+	}
+
+	logLine("Checking data integrity "
+	    "(this is done only once per solver per session)...");
+	if (!solver.check_data().ok()) {
+		emit solverError(QString("Error reading data!"));
+		return false;
+	}
+	logLine("Data checked");
+
+	return true;
+}
+
+Q_INVOKABLE bool NissyAdapter::isValidScramble(QString qscr)
+{
+	nissy::cube c;
+	return c.move(qscr.toStdString()).ok();
+}
+
+Q_INVOKABLE void NissyAdapter::requestSolve(
+	QString scramble,
+	QString solver,
+	int minmoves,
+	int maxmoves,
+	int maxsolutions,
+	int optimal
+)
+{
+	nissy::cube c;
+	if (!c.move(scramble.toStdString()).ok()) {
+		emit solverError(QString("Unexpected error: invalid scramble"));
+		return;
+	}
+
+	nissy::solver *ss = nullptr;
+	for (auto& s : solvers)
+		if (s.name == solver)
+			ss = &s;
+	if (ss == nullptr) {
+		std::string msg = "Error: solver '" + solver.toStdString()
+		    + "' not available";
+		emit solverError(QString::fromStdString(msg));
+		return;
+	}
+
+	SolveOptions opts{c, ss, (unsigned)minmoves, (unsigned)maxmoves,
+	    (unsigned)maxsolutions, (unsigned)optimal};
+	auto _ = QtConcurrent::run(&NissyAdapter::startSolve, this, opts);
+	return;
+}
+
+void NissyAdapter::startSolve(SolveOptions opts)
+{
+	loadSolverData(*opts.solver);
+
+	auto result = opts.solver->solve(opts.cube, nissy::nissflag::NORMAL,
+	    opts.minmoves, opts.maxmoves, opts.maxsolutions, opts.optimal, 8);
+
+	if (!result.err.ok()) {
+		std::string msg = "Error computing solutions: " +
+		    std::to_string(result.err.value);
+		emit solverError(QString::fromStdString(msg));
+		return;
+	}
+
+	auto& sols = result.solutions;
+	if (sols.size() == 0) {
+		emit solutionsReady("No solution found", "");
+	} else {
+		std::stringstream hs;
+		hs << "Found " << sols.size() << " solution"
+		    << (sols.size() > 1 ? "s:" : ":");
+
+		std::stringstream ss;
+		for (auto s : sols) {
+			auto n = nissy::count_moves(s).value;
+			ss << s << " (" << n << ")" << std::endl; // TODO: remove last newline
+		}
+		emit solutionsReady(QString::fromStdString(hs.str()),
+		   QString::fromStdString(ss.str()));
+	}
+}
+
+void NissyAdapter::logLine(std::string str)
+{
+	std::stringstream ss;
+	ss << str << std::endl;
+	writeLog(ss.str());
+}
-- 
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