From 23f67af24b944438d332250e36c21c92eae5372d Mon Sep 17 00:00:00 2001
From: Florian Baumann <flo@noqqe.de>
Date: Mon, 28 Nov 2022 16:47:56 +0100
Subject: [PATCH] Add card input validation

---
 src/serra/scryfall.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/serra/scryfall.go b/src/serra/scryfall.go
index 5a07a4d..f9561b9 100644
--- a/src/serra/scryfall.go
+++ b/src/serra/scryfall.go
@@ -8,6 +8,7 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+	"strings"
 	"time"
 
 	"go.mongodb.org/mongo-driver/bson/primitive"
@@ -156,6 +157,12 @@ type Set struct {
 }
 
 func fetch_card(path string) (*Card, error) {
+
+	if !strings.Contains(path, "/") {
+		err := errors.New(fmt.Sprintf("Card must follow format <set>/<number>, for example: ath/15"))
+		return &Card{}, err
+	}
+
 	// TODO better URL Building...
 	resp, err := http.Get(fmt.Sprintf("https://api.scryfall.com/cards/%s/", path))
 	if err != nil {