1 files changed, 59 insertions, 0 deletions
diff --git a/exp/functions.go b/exp/functions.go
new file mode 100644
index 0000000..720a755
--- /dev/null
+++ b/exp/functions.go
@@ -0,0 +1,59 @@
+package exp
+
+import (
+	"fmt"
+	"github.com/anhgelus/gokord"
+	"math"
+	"slices"
+	"time"
+)
+
+func MessageXP(length uint, diversity uint) uint {
+	return uint(math.Floor(
+		0.025*math.Pow(float64(length), 1.25)*math.Sqrt(float64(diversity)) + 1,
+	))
+}
+
+func CalcDiversity(msg string) uint {
+	var chars []rune
+	for _, c := range []rune(msg) {
+		if !slices.Contains(chars, c) {
+			chars = append(chars, c)
+		}
+	}
+	return uint(len(chars))
+}
+
+func VocalXP(time uint) uint {
+	return uint(math.Floor(
+		0.01*math.Pow(float64(time), 1.3) + 1,
+	))
+}
+
+// Level gives the level with the given XP.
+// See LevelXP to get the XP required to get a level.
+func Level(xp uint) uint {
+	return uint(math.Floor(
+		0.2 * math.Sqrt(float64(xp)),
+	))
+}
+
+// LevelXP gives the XP required to get this level.
+// See Level to get the level with the given XP.
+func LevelXP(level uint) uint {
+	return uint(math.Floor(
+		math.Pow(float64(5*level), 2),
+	))
+}
+
+// TimeStampNDaysBefore returns the timestamp (year-month-day) n days before today
+func TimeStampNDaysBefore(n uint) string {
+	var y, d int
+	var m time.Month
+	if gokord.Debug {
+		y, m, d = time.Unix(time.Now().Unix()-int64(24*60*60), 0).Date() // reduce time for debug
+	} else {
+		y, m, d = time.Unix(time.Now().Unix()-int64(n*24*60*60), 0).Date()
+	}
+	return fmt.Sprintf("%d-%d-%d", y, m, d)
+}