Added files from project 2 (mirror)

1 files changed, 72 insertions, 0 deletions

diff --git a/Year 1/Object-oriented Programming/Project 2/src/Generic/ConsoleInterface/Menu.cpp b/Year 1/Object-oriented Programming/Project 2/src/Generic/ConsoleInterface/Menu.cpp
new file mode 100644
index 0000000..9c2fca5
--- /dev/null
+++ b/Year 1/Object-oriented Programming/Project 2/src/Generic/ConsoleInterface/Menu.cpp
@@ -0,0 +1,72 @@
+#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());
+		}
+	}
+}