3 files changed, 132 insertions, 0 deletions
diff --git a/src/cmd/cmd.hpp b/src/cmd/cmd.hpp
new file mode 100644
index 0000000..37bb3ce
--- /dev/null
+++ b/src/cmd/cmd.hpp
@@ -0,0 +1,89 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/cgit/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
+#ifndef SMOLBOTE_CMD_HPP
+#define SMOLBOTE_CMD_HPP
+
+#include "version.h"
+#include <QCommandLineParser>
+#include <QCoreApplication>
+#include <functional>
+#include <iostream>
+
+namespace command_line
+{
+template <typename T>
+using subcommand_fn = std::function<int(const QStringList &, T &)>;
+template <typename T>
+using map = std::unordered_map<std::string, subcommand_fn<T>>;
+
+// a helper function to join the keys of a command_map into a string
+template <typename T>
+[[nodiscard]] inline QString join_keys(const map<T> &map, const QString sep = ", ")
+{
+    QString k;
+    for(auto it = map.cbegin(); it != map.cend(); ++it) {
+        k += QString::fromStdString(it->first);
+        if(std::next(it) != map.cend()) {
+            k += sep;
+        }
+    }
+    return k;
+}
+
+template <typename T>
+[[nodiscard]] std::function<int(T &)> process(T &app, const map<T> &map, const std::string &d)
+{
+    const QCommandLineOption build({ "b", "build" }, "Display build information.");
+    const QCommandLineOption config({ "c", "config" }, "Set the configuration file.", "file");
+    const QCommandLineOption noRemote("no-remote", "Do not accept or send remote commands.");
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription("smolbote: yet another no-frills browser");
+    parser.setOptionsAfterPositionalArgumentsMode(QCommandLineParser::ParseAsPositionalArguments);
+    parser.addHelpOption();
+    parser.addVersionOption();
+
+    parser.addOption(build);
+    parser.addOption(config);
+    parser.addOption(noRemote);
+
+    parser.addPositionalArgument("subcommand", QString("%1; default: %2").arg(join_keys(map), QString::fromStdString(d)));
+    parser.addPositionalArgument("urls", "List of URLs to open.");
+
+    parser.process(app);
+
+    if(parser.isSet(build)) {
+        std::cout << app.applicationName().toStdString() << " " << poi_Version << std::endl;
+        exit(0);
+    }
+
+    if constexpr(requires { app.loadConfiguration(parser.value(config)); }) {
+        app.loadConfiguration(parser.value(config));
+    } else {
+        qDebug("warning: cannot init configuration");
+    }
+
+    if constexpr(requires { app.enableRemote(true); }) {
+        app.enableRemote(!parser.isSet(noRemote));
+    }
+
+    const auto args = parser.positionalArguments();
+
+    if(args.count() >= 1) {
+        auto i = map.find(args.first().toStdString());
+        if(i != map.end())
+            return std::bind(i->second, args, std::placeholders::_1);
+    }
+
+    return std::bind(map.at(d), args, std::placeholders::_1);
+}
+
+} // namespace
+
+#endif
diff --git a/src/cmd/meson.build b/src/cmd/meson.build
new file mode 100644
index 0000000..466647f
--- /dev/null
+++ b/src/cmd/meson.build
@@ -0,0 +1,2 @@
+test('command line parser', executable('cmd_test', ['test.cpp', version_h], dependencies: [ dep_qt5 ]))
+
diff --git a/src/cmd/test.cpp b/src/cmd/test.cpp
new file mode 100644
index 0000000..fc102ff
--- /dev/null
+++ b/src/cmd/test.cpp
@@ -0,0 +1,41 @@
+#include "cmd.hpp"
+#include <QCoreApplication>
+
+int sub_bookmarks(const QStringList &l, QCoreApplication &)
+{
+    const QCommandLineOption q("q", "something");
+    QCommandLineParser parser;
+    parser.setApplicationDescription("testing bookmarks editor");
+    parser.addHelpOption();
+    parser.addOption(q);
+
+    if(l.count() <= 1) {
+        parser.showHelp();
+    }
+    parser.process(l);
+    return 0;
+}
+
+int sub_list(const QStringList &args, QCoreApplication &)
+{
+    for(const auto &x : args) {
+        qDebug("-%s", qUtf8Printable(x));
+    }
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+    app.setApplicationName("cmd_test");
+    app.setApplicationVersion("0.1.0");
+
+    const command_line::map<QCoreApplication> m{
+        { "bookmarks", &sub_bookmarks },
+        { "list", &sub_list }
+    };
+
+    const auto f = command_line::process<QCoreApplication>(app, m, "list");
+    return f(app);
+}
+