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#include "commands.h"
#include "error.h"
#include <cctype>
#include <iostream>
#include <algorithm>
#include <string>
#include <utility>
#include <vector>
#include <regex>
#include <cstring>
using std::cout, std::endl, std::string, std::vector, std::tolower;
CommandsModule::CommandsModule()
{
}
CommandsModule::~CommandsModule()
{
for(Command c : commandList)
{
if(c.argc > 0)
delete[] c.argTypes;
}
}
void CommandsModule::addCommand(Command c)
{
if(lookupCommand(c.name) != nullptr)
{
cout << "Duplicate command: " << c.name << endl;
}
commandList.push_back(c);
}
void CommandsModule::addCommand(std::string name, const void (*func)(const CommandArg *), const int argc, CommandArgType *argTypes)
{
Command c = {name, nullptr, func, argc, argTypes, nullptr};
addCommand(c);
}
void CommandsModule::addCommand(std::string name, const void(*func)(const CommandArg*), const int argc, std::vector<CommandArgType> argTypes)
{
CommandArgType* argTypesArr = new CommandArgType[argc];
for(int i = 0; i < argc; i++)
{
argTypesArr[i] = argTypes[i];
}
addCommand(name, func, argc, argTypesArr);
}
struct NameMatches
{
NameMatches(string s): s_{s} {}
bool operator()(Command c) { return (c.name == s_); }
string s_;
};
Command* CommandsModule::lookupCommand(string name)
{
auto elem = std::find_if(commandList.begin(), commandList.end(), NameMatches(name));
if (elem != commandList.end())
{
int i = elem - commandList.begin();
return &(commandList[i]);
}
else
{
return nullptr;
}
}
vector<string> CommandsModule::splitCommand(string command)
{
vector<string> v;
string regexString = "((?:\"[^\"\n]+\")|(?:'[^'\n]+')|(?:[^ \n]+))+";
std::regex regex(regexString, std::regex_constants::_S_icase);
auto begin = std::sregex_iterator(command.begin(), command.end(), regex);
auto end = std::sregex_iterator();
for (std::sregex_iterator i = begin; i != end; i++)
{
std::smatch match = *i;
std::string str = match.str();
if(str[0] == '\'' || str[0] == '"')
str = str.substr(1, str.size() - 2);
v.push_back(str);
}
return v;
}
template <typename T>
std::basic_string<T> lowercase(const std::basic_string<T>& s)
{
std::basic_string<T> s2 = s;
std::transform(s2.begin(), s2.end(), s2.begin(), [](unsigned char c){ return std::tolower(c); });
return s2;
}
CommandArg* CommandsModule::getCommandArgs(vector<string>& split, const CommandArgType* argTypes, const int argc)
{
CommandArg* args = new CommandArg[argc];
for(int i = 1; i < argc + 1; i++)
{
switch(argTypes[i-1])
{
case STR: args[i-1].str = (char*)split[i].c_str(); break;
case NUM: args[i-1].num = std::stoi(split[i]); break;
case MOVDIR: args[i-1].dir = LEFT; break;
case STR_REST:
{
string rest = "";
for(int j = i; j < split.size(); j++)
{
rest += split[j];
if(j != split.size() - 1)
rest += " ";
}
args[i-1].str = new char[rest.size()];
strcpy(args[i-1].str, rest.c_str());
return args;
}
case NUM_ARR_REST:
{
int* rest = new int[split.size() - i];
for(int j = 0; j < split.size() - i; j++)
{
rest[j] = std::stoi(split[j + i]);
}
args[i-1].numArr = {rest, (int) split.size() - i};
return args;
}
default: cout << "UH OH SOMETHING IS VERY WRONG" << endl;
}
}
return args;
}
void CommandsModule::runCommand(string command)
{
vector<string> split = splitCommand(command);
Command* cmd = lookupCommand(split[0]);
if(cmd == nullptr)
throw Err(CMD_ERR_NOT_FOUND, split[0] + " is not a valid command name");
if(cmd->argc > split.size() - 1)
throw Err(CMD_ERR_WRONG_ARGS, command + " is the wrong args");
CommandArg* args = getCommandArgs(split, cmd->argTypes, cmd->argc);
try
{
if(cmd->module == nullptr)
cmd->staticFunc(args);
else
cmd->func(*cmd->module, args);
}
catch (Err e)
{
for(int i = 0; i < cmd->argc; i++)
{
if(cmd->argTypes[i] == STR_REST)
delete[] args[i].str;
}
delete[] args;
throw e;
}
for(int i = 0; i < cmd->argc; i++)
{
if(cmd->argTypes[i] == STR_REST)
delete[] args[i].str;
}
delete[] args;
}
Err CommandsModule::checkCommand(string command)
{
vector<string> split = splitCommand(command);
Command* cmd = lookupCommand(split[0]);
if(cmd == nullptr)
return Err(CMD_ERR_NOT_FOUND, split[0] + " is not a valid command name");
if(cmd->argc > split.size())
return Err(CMD_ERR_WRONG_ARGS, command + " is the wrong args");
CommandArg* args = getCommandArgs(split, cmd->argTypes, cmd->argc);
for(int i = 0; i < cmd->argc; i++)
{
if(cmd->argTypes[i] == STR_REST || cmd->argTypes[i] == NUM_ARR_REST)
delete[] args[i].str;
}
delete[] args;
return Err(NOERR, "");
}
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