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#include "Menu.h"
#include "Toolbox.hpp"
#include <cstring>
Menu::Menu() : menuOptions() {}
unsigned indexOfCommandEnd(char* str) {
unsigned ind = 0;
std::cout << str[ind] << std::endl;
return ind;
}
void Menu::addCommand(const Command& command) {
menuOptions.add(command);
}
/*!
* Prints the title, then an Error/Warning/Sucess message (if set),
* prints all command names as an ordered list (starting from 1),
* waits for user input to select one of those commands (by list number)
* and finally executes the appropriate command's run() function.
*
* After the run() function exists, everything is reprinted.
* The 0 list index is always "Go Back"/"Exit" and it always stops the reprinting loop.
*
* If there are no commands, prints "Menu is empty!".
* If user input doesn't correspond to any command, registers an error message and reprints.
*/
void Menu::navigate() const {
if (menuOptions.get_count() == 0) {
printLine("Menu is empty!");
return;
}
char buffer[MAX_LINE_WIDTH];
unsigned startIndex, commandEnd, paramsStart, index;
bool hasThrown = false;
while (!hasThrown) {
startIndex = 0;
inputLineBox(buffer, MAX_LINE_WIDTH, false);
while (buffer[startIndex] == ' ') startIndex++;
commandEnd = startIndex;
while (buffer[commandEnd] != ' ' && buffer[commandEnd] != '\n' && buffer[commandEnd] != '\0')
commandEnd++;
index = menuOptions.get_count();
for (unsigned i = 0; i < menuOptions.get_count() && index == menuOptions.get_count(); i++) {
if (strncmp(buffer + startIndex, menuOptions[i].get_name(), commandEnd - startIndex) == 0)
index = i;
}
paramsStart = startIndex + commandEnd;
while (buffer[paramsStart] == ' ') paramsStart++;
if (index == menuOptions.get_count()) {
printLine("Invalid menu option!");
continue;
}
try {
menuOptions[index].run(buffer + paramsStart);
}
catch (std::logic_error err) {
hasThrown = true;
printLine(err.what());
}
}
}
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