/// <summary>
/// Main program method. Read command line arguments.
/// </summary>
/// <param name="args">Command line arguments.</param>
static void Main(string[] args)
{
// Read request from args...
Request request = new Request(args);
// Help or Error...
switch (request.getAction())
{
case Action.Help:
printHelp();
return;
case Action.Error:
Console.WriteLine("Bad parameters used.");
Console.WriteLine("");
printHelp();
return;
}
// Read hosts file...
Hosts hosts = new Hosts(Hosts.getHostsFilePath());
hosts.parse();
// Run request...
hosts.performAction(request);
}
/// <summary>
/// Perform action from request.
/// </summary>
/// <param name="request">request</param>
public void performAction(Request request)
{
// Help and Error action can not be performed...
if ((request.getAction() == Action.Help) || (request.getAction() == Action.Error))
{
throw new Exception("Bad action to make");
}
// Save request IP address and hostnames...
string ip = request.getIp();
List<string> hostnames = request.getHostnames();
// Run action...
switch (request.getAction())
{
case Action.Add :
// Add only hostnames that does not exists in hosts file...
List<string> addHostnames = new List<string>();
foreach (string hostname in hostnames)
{
Host[] hostsHostname = getHostsByHostname(hostname);
if (hostsHostname.Length > 0)
{
foreach (Host hostHostname in hostsHostname)
{
Console.WriteLine("WARNING: hostname \"" + hostname + "\" is already used with IP address \"" + hostHostname.getIp() + "\"");
}
}
if (contains(ip, hostname))
{
Console.WriteLine("NOT ADDED: \"" + ip + " - " + hostname + "\" combination already exists in hosts file");
}
else
{
addHostnames.Add(hostname);
}
}
// Add new host...
hosts.Add(new Host(ip, addHostnames, request.getComment()));
break;
case Action.Remove :
// Write non existing combination to console...
foreach (string hostname in hostnames)
{
if (!contains(ip, hostname))
{
Console.WriteLine("NOT REMOVED: \"" + ip + " - " + hostname + "\" combination not exists in hosts file");
}
}
// Get hosts and removed their hostnames...
foreach (Host host in getHostsByIp(ip))
{
foreach (string hostname in hostnames)
{
if (host.hasHostname(hostname))
{
host.removeHostname(hostname);
}
}
}
break;
case Action.Test :
// Determine if IP address and hostname exists in hosts file...
foreach (string hostname in hostnames)
{
if (contains(ip, hostname))
{
Console.WriteLine("EXISTS: \"" + ip + " - " + hostname + "\" combination exists in hosts file");
}
else
{
Console.WriteLine("NOT EXISTS: \"" + ip + " - " + hostname + "\" combination not exists in hosts file");
}
}
break;
}
// Save (print on DEBUG) while Add or Remove action...
if ((request.getAction() == Action.Add) || (request.getAction() == Action.Remove))
{
#if DEBUG
print();
#else
save();
#endif
}
}
