ludic/packages/ludic.inventory/system.ludic
Orkuncakilkaya 8075892e0e feat(ludic.inventory, ludic.wallet): the pack and the purse as mechanic packages
ludic.inventory: counts per item kind, a PackRules port (stack_limit), add
what fits / take all or none / set outright, an ItemChanged queue, and a save
section keyed by item NAME so a game can reorder its items with no migration.
ludic.wallet: earn, spend only what is there, lose down to zero, set, a
MoneyChanged queue and its own save section. Six and five test blocks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-25 04:29:17 +03:00

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# system.ludic - the pack as a system: reset and its own save section, each count under its
# kind's name, so kinds can be added or reordered without a migration
export function inv_reset() -> void {
inv_clear()
q_clear(inv_changes())
}
export function inv_save() -> Val {
let counts = Value.object()
for i in 0 .. inv_kinds() {
if iv_counts[i] != 0 { sv_put_int(counts, iv_keys[i], iv_counts[i]) }
}
let v = Value.object()
Value.put(v, "counts", counts)
return v
}
# a name this build does not know is dropped
export function inv_load(v: Val, version: int) -> void {
inv_clear()
if Value.has(v, "counts") == 0 { return }
let counts = Value.get(v, "counts")
for i in 0 .. inv_kinds() { iv_counts[i] = Math.max(sv_int(counts, iv_keys[i], 0), 0) }
}
export function inv_system() -> System {
let s = system_new("inventory", PH_COMMIT)
s.reset = fn inv_reset
s.save = fn inv_save
s.load = fn inv_load
return s
}