Sort on card numbers is now numeric. fixes #8

src/serra/card.go

@@ -2,6 +2,7 @@ package serra
 
 import (
 	"fmt"
+	"sort"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -111,6 +112,14 @@ func Cards(rarity, set, sortby, name, oracle, cardType string) []Card {
 
 	cards, _ := coll.storage_find(filter, sortStage)
 
+	// This is needed because collectornumbers are strings (ie. "23a") but still we
+	// want it to be sorted numerically ... 1,2,3,10,11,100.
+	if sortby == "number" {
+		sort.Slice(cards, func(i, j int) bool {
+			return filterForDigits(cards[i].CollectorNumber) < filterForDigits(cards[j].CollectorNumber)
+		})
+	}
+
 	return cards
 }
 

src/serra/helpers.go

@@ -3,7 +3,9 @@ package serra
 import (
 	"errors"
 	"fmt"
+	"strconv"
 	"time"
+	"unicode"
 
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/bson/primitive"
@@ -167,3 +169,14 @@ func print_price_history(prices []PriceEntry, prefix string) {
 		before = value
 	}
 }
+
+func filterForDigits(str string) int {
+	var numStr string
+	for _, c := range str {
+		if unicode.IsDigit(c) {
+			numStr += string(c)
+		}
+	}
+	s, _ := strconv.Atoi(numStr)
+	return s
+}