Add money and head handling functions

Created types to manage the cannonical coinage of DnD.
First pass at computing computing values for heads.

1 files changed, 37 insertions, 0 deletions

diff --git a/economy/heads.go b/economy/heads.go
new file mode 100644
index 0000000..15c9456
--- /dev/null
+++ b/economy/heads.go
@@ -0,0 +1,37 @@
+package economy
+
+import (
+	"maps"
+)
+
+type Location uint
+type CostFunc func(cr float32, mutiplier float32, modifier float32) Money
+
+const (
+	Field Location = iota
+	Display
+	Storage
+)
+
+type Head struct {
+	Location   Location
+	Conditions struct {
+		Multipliers map[string]float32
+		Modifiers   map[string]float32
+	}
+	CR float32
+}
+
+func (h Head) Value(cost CostFunc) Money {
+	var multiplier float32 = 1
+	for val := range maps.Values(h.Conditions.Multipliers) {
+		multiplier *= val
+	}
+
+	var modifier float32 = 0
+	for val := range maps.Values(h.Conditions.Modifiers) {
+		modifier += val
+	}
+
+	return cost(h.CR, multiplier, modifier)
+}