world/mob = /mob/Player  //This makes the default mob to login to a PC.


mob/Player/Login()           //Let's get started:
    var/I = input("What would you like to do? (You are only allowed one Character per Key, creating a new one will delete the old...)","Logging in:","Continue") in list("Continue","Create New Character")  //The input command is made so you can get information from whoever is defined and make the variable defined before the input() that value.
    if(I == "Continue")  //If the player selected continue...
        var/savefile/F = new(client.Import())  //Ok, this is an advanced concept so if you get confused by this, skip it because all you really need to know is the format:  savefile is a type like mob, obj, turf, area, atom, and so on are.  When you create a new savefile, it is saved in the area specified (in this I do not specify a file path because client.Import does it for me.).  client.Import will save it in your \BYOND\users\[Your name here]\Keyinfo\ folder...  When I get to client.Export (the second part of this, the actual saving of it in other words) I will explain this some more...
        if(F)
            F["X"] >> X
            F["Y"] >> Y
            F["Z"] >> Z
            Read(F)
            if( X )
                src.loc = locate( X, Y, Z )
        else
            usr << "You don't have a character saved!"
            return()
            I = "Create New Character"  //Turn I back to "Create New Character" so when it gets to that part of the proc below, it will make the person create a new one.
    if(I == "Create New Character")  //If they selected to create a new character or if it couldn't find a savefile which is defined above...
        Name_Character()
mob/proc/Name_Character()   //This is a proc we called above in Login().
    var/N = input("What would you like your name to be?","Name:",key) as text  //The input() proc can also be used to get text form the player, or number, type, or whatever!
    if(N == ""||N == null)  //If the player did not put anything...
        alert("You need to enter a name!")  //Tell him this...
        spawn()  //This is used to make loops that could or do go on forever not crash.  You can also put a delay in 1/10s of a second in the arguments to make it wait before calling the proc that is called after it.
            Name_Character()  //And make him do it again!
    else  //If the player did enter something...
        if(length(N) < 25)  //Here is that old length() proc again.  This time it checks to make sure the player's name he defined isn't too long.
            name = N  //Make that mob's name into what the player wanted it to be.
        else
            //If it is too long...
            alert("Your name was too long, it must be below 25 characters!")  //Do this stuff again:
            spawn()
                Name_Character()
    usr.loc=locate(2,2,1)

mob/proc/Save_Character()  //Ok, now back to the saving stuff.  The type of savefiles we are using are unique because they are client-side savefiles, meaning you can login to someone elses server and still have your character.
    var/savefile/F = new()  //This makes a new savefile.  The variable F now means the savefile...
    Write(F)  //The Write proc, like the Read proc will do savefile saving for you.  This however, unlike Read(), will save the players mob that he/she has into the savefile specified.
    client.Export(F)      //This will put that savefile into your \BYOND\users\[Your name here]\Keyinfo\ folder.
    src << "[src.name] saved."  //Tell the src that it has been saved.
    F["X"] << src.x
    F["Y"] << src.y
    F["Z"] << src.z

mob/Player/verb/Save()         //We gotta let the player do it manually, right?
    set category = "Commands"
    src.Save_Character()  //Save the character with the proc we defined above.
    
var
    X
    Y
    Z
    I