1 files changed, 127 insertions, 0 deletions
diff --git a/src/roster/struct/rst_roster.erl b/src/roster/struct/rst_roster.erl
new file mode 100644
index 0000000..a362619
--- /dev/null
+++ b/src/roster/struct/rst_roster.erl
@@ -0,0 +1,127 @@
+-module(rst_roster).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-type id() :: binary().
+
+-record
+(
+   roster,
+   {
+      id :: id(),
+      owner :: binary(),
+      characters :: array:array(rst_character:type())
+   }
+).
+
+-opaque type() :: #roster{}.
+
+-export_type([type/0, id/0]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%% Accessors
+-export
+(
+   [
+      get_id/1,
+      get_owner/1,
+      get_characters/1,
+      get_character/2,
+
+      set_characters/2,
+      set_character/3,
+
+      add_character/2,
+      remove_character/2
+   ]
+).
+
+-export
+(
+   [
+      get_characters_field/0
+   ]
+).
+
+-export
+(
+   [
+      new/2
+   ]
+).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%% Accessors
+-spec get_id (type()) -> id().
+get_id (Roster) -> Roster#roster.id.
+
+-spec get_owner (type()) -> binary().
+get_owner (Roster) -> Roster#roster.owner.
+
+-spec get_characters (type()) -> array:array(rst_character:type()).
+get_characters (Roster) -> Roster#roster.characters.
+
+-spec get_character (non_neg_integer(), type()) -> rst_character:type().
+get_character (IX, Roster) -> array:get(IX, Roster#roster.characters).
+
+-spec set_characters (array:array(rst_character:type()), type()) -> type().
+set_characters (Characters, Roster) -> Roster#roster{ characters = Characters }.
+
+-spec set_character
+   (
+      non_neg_integer(),
+      rst_character:type(),
+      type()
+   )
+   -> type().
+set_character (IX, Character, Roster) ->
+   Roster#roster
+   {
+      characters = array:set(IX, Character, Roster#roster.characters)
+   }.
+
+-spec add_character (rst_character:type(), type()) -> type().
+add_character (Character, Roster) ->
+   CurrentCharacters = Roster#roster.characters,
+   CurrentSize = array:size(CurrentCharacters),
+
+   Roster#roster
+   {
+      characters = array:set(CurrentSize, Character, CurrentCharacters)
+   }.
+
+-spec remove_character (non_neg_integer(), type()) -> type().
+remove_character (IX, Roster) ->
+   CurrentCharacters = Roster#roster.characters,
+   CurrentSize = array:size(CurrentCharacters),
+   NewSize = (CurrentSize - 1),
+   LastCharacter = array:get(NewSize, CurrentCharacters),
+
+   S0Characters = array:set(IX, LastCharacter, CurrentCharacters),
+   S1Characters = array:resize(NewSize, S0Characters),
+
+   Roster#roster
+   {
+      characters = S1Characters
+   }.
+
+-spec get_characters_field () -> non_neg_integer().
+get_characters_field () -> #roster.characters.
+
+-spec new (binary(), binary()) -> type().
+new (ID, Owner) ->
+   #roster
+   {
+      id = ID,
+      owner = Owner,
+      characters = array:new()
+   }.