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/*
This file is part of Android File Transfer For Linux.
Copyright (C) 2015-2020 Vladimir Menshakov
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef AFTL_CLI_COMMAND_H
#define AFTL_CLI_COMMAND_H
#include <cli/Tokens.h>
#include <cli/MakeTuple.h>
#include <mtp/types.h>
#include <mtp/function_invoker.h>
#include <mtp/Demangle.h>
#include <functional>
#include <string>
#include <list>
namespace cli
{
class Session;
struct Path : public std::string { Path(const std::string &path = std::string()): std::string(path) { } };
struct LocalPath : public std::string { LocalPath(const std::string &path = std::string()): std::string(path) { } };
struct StoragePath : public std::string { StoragePath(const std::string &path = std::string()): std::string(path) { } };
inline std::string EscapePath(std::string name)
{
if (name.find(' ') != name.npos)
return '"' + name +'"';
else
return name;
}
typedef std::list<std::string> CompletionResult;
struct CompletionContext
{
cli::Session & Session;
size_t Index;
std::string Prefix;
CompletionResult & Result;
CompletionContext(cli::Session &s, size_t i, const std::string &p, std::list<std::string> & r):
Session(s), Index(i), Prefix(p), Result(r) { }
};
namespace impl
{
template<>
struct ValueConverter<LocalPath>
{
static LocalPath Convert(const Path &text)
{ return text; }
};
template<>
struct ValueConverter<Path>
{
static Path Convert(const Path &text)
{ return text; }
};
template<>
struct ValueConverter<StoragePath>
{
static StoragePath Convert(const Path &text)
{ return text; }
};
template<typename Type>
struct Completer
{
static void Complete(CompletionContext & ctx) { }
};
template<>
struct Completer<Path>
{
static void Complete(CompletionContext & ctx);
};
template<>
struct Completer<StoragePath>
{
static void Complete(CompletionContext & ctx);
};
template<typename ... Tail>
struct CompletionForwarder
{
static void Complete(CompletionContext & ctx, size_t index)
{ }
};
template<typename First, typename ... Tail>
struct CompletionForwarder<First, Tail...>
{
static void Complete(CompletionContext & ctx, size_t index)
{
if (index == 0)
Completer<typename std::decay<First>::type>::Complete(ctx);
else
CompletionForwarder<Tail...>::Complete(ctx, index - 1);
}
};
};
struct ICommand
{
virtual ~ICommand() = default;
virtual void Execute(const Tokens &tokens) const = 0;
virtual size_t GetArgumentCount() const = 0;
virtual std::string GetHelpString() const = 0;
virtual void Complete(CompletionContext &ctx) const = 0;
};
DECLARE_PTR(ICommand);
class BaseCommand : public virtual ICommand
{
std::string _help;
public:
BaseCommand(const std::string &help): _help(help) { }
virtual std::string GetHelpString() const
{ return _help; }
};
template<typename ... Args>
struct Command : public BaseCommand
{
typedef std::function<void (Args...)> FuncType;
FuncType _func;
Command(const std::string &help, FuncType && func) : BaseCommand(help), _func(func) { }
template<typename ...FuncArgs>
static void Execute(std::function<void (FuncArgs...)> func, const Tokens & tokens)
{
auto args = cli::MakeTuple<Tokens::const_iterator, FuncArgs...>(tokens.begin(), tokens.end());
mtp::invoke(func, args);
}
virtual void Execute(const Tokens &tokens) const
{
Execute(_func, tokens);
}
virtual size_t GetArgumentCount() const
{ return sizeof...(Args); }
virtual void Complete(CompletionContext &ctx) const
{ impl::CompletionForwarder<Args...>::Complete(ctx, ctx.Index); }
};
}
#endif
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