public FTCResponse Create([FromBody] FTCRequest reqItem)
{
Tag item = new Tag()
{
Name = reqItem.Name,
Definition = reqItem.Definition,
};
SymbolStack sb = new SymbolStack();
var response = new FTCResponse()
{
Code = FTCResponse.ERROR //Error
};
if (item == null)
{
response.Content = FTCResponse.INVALID_REQUEST;
return(response);
}
else if (item.Name == null)
{
response.Content = Tag.INVALID_NAME;
return(response);
}
else if (item.Name.Length == 0)
{
response.Content = Tag.INVALID_NAME;
return(response);
}
else if (item.Definition == null)
{
response.Content = Tag.INVALID_DEFINITION;
return(response);
}
else if (item.Definition.Length == 0)
{
response.Content = Tag.INVALID_DEFINITION;
return(response);
}
// var itens = from u in _context.Tags
// where u.Name.Equals(item.Name) || u.Definition.Equals(item.Definition)
// select u;
// if(itens.Any())
//Error if have repeated tags.
if (_context.Tags.Any(u => u.Name.Equals(item.Name) || u.Definition.Equals(item.Definition)))
// if(_context.Tags.Any(u=>u.Equals(item)))
{
response.Content = Tag.TAG_EXISTS;
response.Code = FTCResponse.ERROR;
return(response);
}
bool isEscape = false;
bool valid = true;
//Processing syntax
foreach (char x in item.Definition)
{
if (isEscape) //last char was '\'
{
if (Tag.ESCAPE.Contains(x)) //x is a valid escape char.
{
sb.Add(new Symbol($"\\{x}")); //Add it to test semantic.
isEscape = false; //last char now isn't a '\'
continue; //next iteration.
}
else
{
valid = false; //invalid syntax, abort.
break;
}
}
if (x == Tag.ESCAPE_CHAR) //x is '\', iterating searching escape-chars.
{
isEscape = true;
continue;
}
else
{ //x is a single symbol, search for operators, or add it as symbol.
if (x == '+')
{
sb.Add(Operator.UNION);
}
else if (x == '.')
{
sb.Add(Operator.CONCAT);
}
else if (x == '*')
{
sb.Add(Operator.KLEENE);
}
else
{
sb.Add(new Symbol($"{x}"));
}
}
}
//no syntax errors...
if (valid)
{
valid = sb.Verify;
}
//Expression have syntax or semantic errors.
if (!valid)
{
response.Content = Tag.INVALID_DEFINITION;
return(response);
}
//Group not defined... picking default.
if (reqItem.Group == null || reqItem.Group.Length == 0)
{
item.Group = _context.Groups.OrderBy(i => i.GroupId).FirstOrDefault();
response.Content = Group.GROUP_DEFAULT + " " + String.Format(Tag.TAG_DEFINED, item.Name);
response.Code = FTCResponse.WARNING;
}
//Group doesn't exists.
else if (!_context.Groups.Any(g => reqItem.Group.Equals(g.Name)))
{
item.Group = new Group()
{
Name = reqItem.Group
};
_context.Groups.Add(item.Group);
response.Code = FTCResponse.INFO;
response.Content = String.Format(Group.GROUP_NEW, item.Group) + String.Format(Tag.TAG_DEFINED, item.Name);
}
//Group Exists.
else
{
item.Group = _context.Groups.FirstOrDefault(u => u.Name.Equals(reqItem.Group));
response.Code = FTCResponse.INFO;
response.Content = String.Format(Tag.TAG_DEFINED, item.Name);
}
_context.Tags.Add(item);
_context.SaveChanges();
response.Id = item.TagId;
return(response);
}
