User:PhaethonH/PH inventory.prolog

From Egs Mayhem

---

Current revision as of 03:13, 13 August 2007

%#! gprolog --entry-goal "consult('./PH_inventory.prolog')"
% phaethon@EGC.prolog
% GNU Prolog.

:- dynamic(maxitemid/1, logtime/1).

% Convenience predicate -- make GNU Prolog stop complaining about deliberate singletons.
ignore(_).

% These predicates affect dynamic predicates.
newitemid(IDnum) :-
  maxitemid(M),
  N is (M+1),
  IDnum is M,
  retractall(maxitemid(_)),
  asserta(maxitemid(N)).

ts(X) :-
  retractall(logtime(_)),
  asserta(logtime(X)).


% Affects dynamic database.

obtain(Giver, Item) :-
  obtain(Giver, Item, []).

obtain(Giver, Count, Item) :-
  number(Count),
  obtain(Giver, Count, Item, []).

obtain(Giver, Item, Descriptions) :-
  newitemid(ID),
  describe(ID, Descriptions),
  logtime(TS),
  assertz(ts(TS, obtain(ID))),
  assertz(item(ID, Item)),
  assertz(blame(ID, Giver)).

obtain(_, 0, _).

obtain(Giver, Count, Item, Descriptions) :-
  number(Count),
  Count > 0,
  obtain(Giver, Item, Descriptions),
  Oneless is (Count-1),
  obtain(Giver, Oneless, Item, Descriptions).  %Recurse!

obtain(_, 0, _, _).

describe(_, []).
describe(ID, [Desc|Rest]) :-
  assertz(attrib(ID, Desc)),
  describe(ID, Rest).


% Inventory listing.

% Determine letter-coding of inventory id number -- probably buggy.
item_header(N, Header) :-
  N > 0,
  N < (1+26),
  Cc is (N + 96),
  char_code(Ch, Cc),
  Header = Ch.

item_header(N, Header) :-
  N > 26,
  N < (1 + 26*2),
  Cc is (N + 64 - 26),
  char_code(Ch, Cc),
  Header = Ch.

item_header(N, Header) :-
  N > (26*2),
  Header = N.


% string.join()
strjoin(ResultString, _, []) :-
  ResultString = "".

strjoin(ResultString, _, [C]) :-
  atomic(C),
  name(C, ResultString)
  ;
  strjoin(ResultString, "", []).

strjoin(ResultString, JoinString, [H|T]) :-
  atomic(H),
  name(H, SrcStr),
  strjoin(RestStr, JoinString, T),
  length(RestStr, Len),
  (Len > 0 -> append(JoinString, RestStr, SuffixStr) ; SuffixStr = RestStr),
  append(SrcStr, SuffixStr, ResultString)
  ;
  strjoin(ResultString, JoinString, T).


% Return string description of item #N (Opts affects description verbosity).
item_line(N, Opts, Line) :-
  item(N, ItemName),
  ignore(Opts),

  findall(X, attrib(N, X), [ItemNoun|ItemAttribs]),
  ignore(ItemNoun),

  strjoin(ItemAttribStr, ", ", ItemAttribs),
  length(ItemAttribStr, IASL),
  (IASL > 0 -> append(" (", ItemAttribStr, S1), append(S1, ")", S2) ; S2 = ""),
  name(ItemAttrib, S2),
  atom_concat(ItemName, ItemAttrib, Line),

  true.


% List description of item #N.
inv_item(N) :-
  maxitemid(Max),
  N < Max,
  item_header(N, ItemHeader),
  write(' '), write(ItemHeader), write(') '),
  item_line(N, [], ItemLine),
  write(ItemLine),
  nl,
  !,
  Next is (N+1),
  inv_item(Next).


% pretty-print inventory.
inv :-
  maxitemid(Max),
  ItemCount is (Max-1),
  write('Current inventory'),
  write(' ('), write(ItemCount), write(' items)'),
  write(':'), nl,
  inv_item(1);
  write('(end)\
'),
  true.


% Old inventory listing.
inv0 :- listing(item), listing(blame).



% blamelist
blame_item(N) :-
  maxitemid(Max),
  N < Max,
  ts(TS, obtain(N)),
  blame(N, W),
  item(N, Item),
%  write(' '), write(N), write('. '),
  write('* '),
  write('['), write(TS), write('] '),
  write(W), write(' provided '), write(Item), nl,
  !,
  Next is (N+1),
  blame_item(Next).

blame :-
  write('Blame list:'), nl,
  blame_item(1);
  write('(end)\
'),
  true.

% Run through all transactions to update dynamic database.
:- initialization(transactions).
%:- initialization(init).





% Record of inventory transactions.
transactions :-
  assertz(maxitemid(1)),

  % First item collection
  ts('2007.08.11 05:12'),
  obtain('Tyris', 'TF Gun', [tfgun]),
  obtain('Tyris', 'Fish', [fish, dead]),
  obtain('Tyris', 'Squirrel teddy', [teddy, squirrel]),
  obtain('Tyris', 6, 'can of soda', [can, soda, unlabeled]),
  obtain('Tyris', 'red crystal inscribed with TF-gun code for Otter V1', [crystal, red, for(tfgun), tfgun('Otter V1')]),

  ts('2007.08.11 05:57'),
  obtain('Kalga', 'yarn ball of distraction', [ball, yarn, distraction]),

  ts('2007.08.11 08:02'),
  obtain('Cheez', 'shiny hubcap', [hubcap, shiny]),
  obtain('Cheez', 'can of mackerel', [can, mackerel]),
  obtain('Cheez', 'bag of salt-n-glass cookies', [bag, cookie, salt_n_glass]),

  ts('2007.08.11 12:46'),
  obtain('littlebeast', 'Infinite Scroll of Doom-Ish', [scroll, infinite, 'doom-ish']),
  obtain('littlebeast', 'Infinite Pen of Doom-Ish', [pen, infinite, 'doom-ish']),

  ts('2007.08.11 16:08'),
  obtain('littlebeast', 'DD/RR mod for TF Gun', [dd_rr_mod, 'DD/RR mod', for(tfgun)]),

  ts('2007.08.11 18:33'),
  obtain('Jenerix525', 'mirror with silver handle', [mirror, 'silver handle', 'not magical']),

  % Add above this line.
  true.


% After consulting/loading this file:
%
% * To generate inventory list:
%| ?- inv.
%
% * To generate blame list:
%| ?- blame.