Convert to lowercase when checking prefix

Return flat modifier in dice roll
Use log.Print instead of log.Fatal where makes sense

application/bot.go

@@ -33,7 +33,7 @@ func init() {
 			return
 		}
 		messageContent := strings.Split(m.Content, " ")
-		if !strings.HasPrefix(messageContent[0], prefix) {
+		if !strings.HasPrefix(strings.ToLower(messageContent[0]), prefix) {
 			return
 		}
 		messageContent[0] = messageContent[0][len(prefix):]
@@ -49,7 +49,7 @@ func init() {
 			},
 		})
 		if err != nil {
-			log.Fatalf("Error sending message: %v", err)
+			log.Printf("Error sending message: %v", err)
 		}
 	})
 }

application/commands.go

@@ -33,7 +33,7 @@ var (
 				},
 			})
 			if err != nil {
-				log.Fatalf("Error responding to interaction: %s\n", err)
+				log.Printf("Error responding to interaction: %s\n", err)
 			}
 		},
 	}
@@ -67,7 +67,7 @@ func roll(opts optionMap) string {
 	if err != nil {
 		return "Error rolling dice: " + err.Error()
 	}
-	roll, err := d.Roll()
+	roll, flat, err := d.Roll()
 	if err != nil {
 		ret := fmt.Sprintf("Error rolling dice: %s", err)
 		fmt.Println(ret)
@@ -78,7 +78,7 @@ func roll(opts optionMap) string {
 	if err != nil {
 		return fmt.Sprintf("Error rolling dice: %s", err)
 	}
-	total := d.Add
+	total := flat
 	for i, die := range roll {
 		_, err = fmt.Fprintf(&ret, "%v", die.Result)
 		if err != nil {

dice/dice.go

@@ -22,14 +22,14 @@ type DieResult struct {
 	Result int
 }
 
-func (d DieExp) Roll() ([]DieResult, error) {
+func (d DieExp) Roll() ([]DieResult, int, error) {
 	results := make([]DieResult, 0)
 	var err error
 
 	for i := 0; i < d.Count; i++ {
 		results, err = addDice(d, results)
 		if err != nil {
-			return nil, err
+			return nil, 0, err
 		}
 	}
 
@@ -52,7 +52,7 @@ func (d DieExp) Roll() ([]DieResult, error) {
 	}
 
 	if d.KeepLow > len(results) {
-		return results, errors.New("keep low higher than remaining results")
+		return nil, 0, errors.New("keep low higher than remaining results")
 	}
 
 	if d.KeepLow != 0 {
@@ -84,7 +84,7 @@ func (d DieExp) Roll() ([]DieResult, error) {
 			alreadyRolled := len(results)
 			results, err = addDice(d, results)
 			if err != nil {
-				return nil, err
+				return nil, 0, err
 			}
 			for _, result := range results[alreadyRolled:] {
 				if result.Result == result.Size {
@@ -93,7 +93,7 @@ func (d DieExp) Roll() ([]DieResult, error) {
 			}
 		}
 	}
-	return results, nil
+	return results, d.Add, nil
 }
 
 func CreateFromExp(exp string) (DieExp, error) {

dice/dice_test.go

@@ -78,7 +78,7 @@ func TestDieExp_roll(t *testing.T) {
 				KeepLow:  tt.fields.KeepLow,
 				Explode:  tt.fields.Explode,
 			}
-			got, err := d.Roll()
+			got, _, err := d.Roll()
 			total := 0
 			for _, v := range got {
 				total += v.Result
@@ -102,7 +102,7 @@ func TestDieExp_roll_keep_high(t *testing.T) {
 		KeepLow:  0,
 		Explode:  false,
 	}
-	got, err := d.Roll()
+	got, _, err := d.Roll()
 	if err != nil {
 		t.Errorf("roll() error = %v", err)
 		return
@@ -120,7 +120,7 @@ func TestDieExp_roll_keep_low(t *testing.T) {
 		KeepLow:  2,
 		Explode:  false,
 	}
-	got, err := d.Roll()
+	got, _, err := d.Roll()
 	if err != nil {
 		t.Errorf("roll() error = %v", err)
 		return
@@ -138,7 +138,7 @@ func TestDieExp_roll_keep_high_low(t *testing.T) {
 		KeepLow:  2,
 		Explode:  false,
 	}
-	got, err := d.Roll()
+	got, _, err := d.Roll()
 	if err != nil {
 		t.Errorf("roll() error = %v", err)
 		return
@@ -156,7 +156,7 @@ func TestDieExp_roll_keep_low_too_high(t *testing.T) {
 		KeepLow:  5,
 		Explode:  false,
 	}
-	_, err := d.Roll()
+	_, _, err := d.Roll()
 	if err == nil {
 		t.Errorf("expected roll error, got nil")
 	}