/// <summary>
/// Tries to parse the parameters for the command
/// </summary>
/// <param name="commandType">the command's method type</param>
/// <param name="neededParms">what paramaters are considered required by the command</param>
private void ParseParamaters(Type commandType, IEnumerable <CommandParameterAttribute> neededParms, bool hasContainer)
{
//HUGE conceit for CacheReferenceType.Container usage
// : We need to store all the found CommandUsage.Subjects and validate them once we get to the container
Type subjectType = typeof(IEntity);
//Flip through each remaining word and parse them
foreach (var currentNeededParm in neededParms.OrderBy(parm => parm.Usage))
{
//why continue if we ran out of stuff
if (CommandStringRemainder.Count() == 0)
{
break;
}
if (hasContainer && currentNeededParm.Usage == CommandUsage.Subject)
{
subjectType = currentNeededParm.ParameterType;
}
foreach (var seekType in currentNeededParm.CacheTypes)
{
switch (seekType)
{
case CacheReferenceType.Code:
SeekInCode(commandType, currentNeededParm);
break;
case CacheReferenceType.Entity:
//So damn ugly, make this not use reflection if possible
MethodInfo entityMethod = GetType().GetMethod("SeekInLiveWorld")
.MakeGenericMethod(new Type[] { currentNeededParm.ParameterType });
entityMethod.Invoke(this, new object[] { commandType, currentNeededParm, commandType.GetCustomAttribute <CommandRangeAttribute>(), hasContainer });
break;
case CacheReferenceType.Container:
MethodInfo containerMethod = GetType().GetMethod("SeekInLiveWorldContainer")
.MakeGenericMethod(new Type[] { currentNeededParm.ParameterType });
containerMethod.Invoke(this, new object[] { commandType, currentNeededParm, subjectType });
break;
case CacheReferenceType.Reference:
MethodInfo referenceMethod = GetType().GetMethod("SeekInReferenceData")
.MakeGenericMethod(new Type[] { currentNeededParm.ParameterType });
referenceMethod.Invoke(this, new object[] { commandType, currentNeededParm });
break;
case CacheReferenceType.Help:
SeekInReferenceData <Help>(commandType, currentNeededParm);
break;
case CacheReferenceType.Data:
MethodInfo dataMethod = GetType().GetMethod("SeekInBackingData")
.MakeGenericMethod(new Type[] { currentNeededParm.ParameterType });
dataMethod.Invoke(this, new object[] { commandType, currentNeededParm });
break;
case CacheReferenceType.Text:
//Text just means grab the remainder of the command string and dump it into a param
switch (currentNeededParm.Usage)
{
case CommandUsage.Supporting:
Supporting = string.Join(" ", CommandStringRemainder);
break;
case CommandUsage.Subject:
Subject = string.Join(" ", CommandStringRemainder);
break;
case CommandUsage.Target:
Target = string.Join(" ", CommandStringRemainder);
break;
}
//empty the remainder
CommandStringRemainder = Enumerable.Empty <string>();
//We return here to end the parsing
return;
}
}
}
}
/// <summary>
/// Where we do the parsing, creates the context and parsed everything on creation
/// </summary>
/// <param name="fullCommand">the initial unparsed input string</param>
/// <param name="actor">the entity issuing the command</param>
public Context(string fullCommand, IActor actor)
{
commandsAssembly = Assembly.GetAssembly(typeof(CommandParameterAttribute));
entitiesAssembly = Assembly.GetAssembly(typeof(IEntity));
OriginalCommandString = fullCommand;
Actor = actor;
Location = (ILocation)Actor.CurrentLocation;
AccessErrors = new List <string>();
CommandStringRemainder = Enumerable.Empty <string>();
LoadedCommands = commandsAssembly.GetTypes().Where(t => t.GetInterfaces().Contains(typeof(ICommand)));
//NPCs can't use anything player rank can't use
if (Actor.GetType().GetInterfaces().Contains(typeof(IPlayer)))
{
LoadedCommands = LoadedCommands.Where(comm => comm.GetCustomAttributes <CommandPermissionAttribute>().Any(att => att.MinimumRank <= ((ICharacter)Actor.DataTemplate).GamePermissionsRank));
}
else
{
LoadedCommands = LoadedCommands.Where(comm => comm.GetCustomAttributes <CommandPermissionAttribute>().Any(att => att.MinimumRank == StaffRank.Player));
}
//find out command's type
var commandType = ParseCommand();
if (commandType == null)
{
AccessErrors.Add("Unknown Command."); //TODO: Add generic errors class for rando error messages
return;
}
//Log people using and even attempting to use admin commands in game
if (commandType.GetCustomAttributes <CommandPermissionAttribute>().Any(att => att.MinimumRank == StaffRank.Admin))
{
LoggingUtility.LogAdminCommandUsage(OriginalCommandString, ((ICharacter)Actor.DataTemplate).AccountHandle);
}
try
{
//find the parameters
var parmList = commandType.GetCustomAttributes <CommandParameterAttribute>();
var hasContainer = parmList.Any(parm => parm.CacheTypes.Any(crt => crt == CacheReferenceType.Container));
//why bother if we have no parms to find?
if (CommandStringRemainder.Count() > 0)
{
ParseParamaters(commandType, parmList, hasContainer);
}
//Did we get errors from the parameter parser? if so bail
if (AccessErrors.Count > 0)
{
return;
}
Command = Activator.CreateInstance(commandType) as ICommand;
if (
(parmList.Any(parm => !parm.Optional && parm.Usage == CommandUsage.Subject) && Subject == null) ||
(parmList.Any(parm => !parm.Optional && parm.Usage == CommandUsage.Target) && Target == null) ||
(parmList.Any(parm => !parm.Optional && parm.Usage == CommandUsage.Supporting) && Supporting == null)
)
{
AccessErrors.Add("Invalid command targets specified.");
AccessErrors.AddRange(Command.RenderSyntaxHelp());
return;
}
//Parms we got doesn't equal parms we loaded
if (CommandStringRemainder.Count() != 0)
{
AccessErrors.Add(string.Format("I could not find {0}.", string.Join(" ", CommandStringRemainder)));
AccessErrors.AddRange(Command.RenderSyntaxHelp());
return;
}
//double check container stuff
if (hasContainer && Subject != null && Subject.GetType().GetInterfaces().Any(typ => typ == typeof(ICollection)))
{
var collection = (ICollection <IEntity>)Subject;
if (collection.Count() == 1)
{
Subject = collection.First();
}
else
{
AccessErrors.Add("Invalid command targets specified.");
AccessErrors.AddRange(Command.RenderSyntaxHelp());
return;
}
}
Command.Actor = Actor;
Command.OriginLocation = Location;
Command.Surroundings = Surroundings;
Command.Subject = Subject;
Command.Target = Target;
Command.Supporting = Supporting;
}
catch (MethodAccessException mEx)
{
Command = Activator.CreateInstance(commandType) as ICommand;
AccessErrors.Add(mEx.Message);
AccessErrors = AccessErrors.Concat(Command.RenderSyntaxHelp()).ToList();
}
}
