Make sets have a lookup map for cards

mlp/booster.go

@@ -118,9 +118,9 @@ func (set *Set) ProviderByRarity(rarity Rarity) draft.CardProvider {
 		}
 		collection = rr
 	} else {
-		for _, card := range set.Cards {
-			if card.Rarity == rarity {
-				collection = append(collection, draft.Card{ID: card.ID})
+		for _, card := range set.CardList {
+			if set.CardData[card.ID].Rarity == rarity {
+				collection = append(collection, card)
 			}
 		}
 	}

mlp/booster_test.go

@@ -30,7 +30,7 @@ func TestAlternates(t *testing.T) {
 
 	// Find all Premiere URs
 	prURs := []string{}
-	for _, card := range prSet.Cards {
+	for _, card := range prSet.CardData {
 		if card.Rarity == mlp.RarityUltraRare {
 			prURs = append(prURs, card.ID)
 		}
@@ -38,7 +38,7 @@ func TestAlternates(t *testing.T) {
 
 	// Find all CN URs
 	cnURs := []string{}
-	for _, card := range cnSet.Cards {
+	for _, card := range cnSet.CardData {
 		if card.Rarity == mlp.RarityUltraRare {
 			cnURs = append(cnURs, card.ID)
 		}

mlp/set.go

@@ -15,7 +15,8 @@ import (
 type Set struct {
 	ID       SetID
 	Name     string
-	Cards []Card
+	CardList []draft.Card
+	CardData map[string]Card
 }
 
 // Card is a single MLP:CCG card in a set
@@ -44,6 +45,24 @@ func (c Card) ToDraftCard() draft.Card {
 	}
 }
 
+// jsonSet is the set as serialized in the JSON files
+type jsonSet struct {
+	ID    SetID
+	Name  string
+	Cards []Card
+}
+
+func (j *jsonSet) toSet() (s Set) {
+	s.Name = j.Name
+	s.CardData = make(map[string]Card)
+	s.CardList = make([]draft.Card, len(j.Cards))
+	for i, card := range j.Cards {
+		s.CardData[card.ID] = card
+		s.CardList[i] = draft.Card{ID: card.ID}
+	}
+	return
+}
+
 // PowerRequirement denotes one or more power requirements, colored or not
 type PowerRequirement map[string]int
 
@@ -87,15 +106,15 @@ func LoadSetBytes(id SetID, setdata []byte) (*Set, error) {
 		return set, nil
 	}
 
-	var set Set
-	err := json.Unmarshal(setdata, &set)
-	set.ID = id
-
-	// If set loaded fine, cache it
-	if err == nil {
-		loadedSets[set.ID] = &set
+	var jsonset jsonSet
+	err := json.Unmarshal(setdata, &jsonset)
+	if err != nil {
+		return nil, err
 	}
 
+	set := jsonset.toSet()
+	set.ID = id
+	loadedSets[set.ID] = &set
 	return &set, err
 }
 

mlp/set_test.go

@@ -136,7 +136,7 @@ func TestLoadCache(t *testing.T) {
 	}
 
 	// Check that loaded set via HTTP is the dummy cache and not the real thing
-	if len(loadedset.Cards) != 0 {
+	if len(loadedset.CardList) != 0 {
 		t.Fatalf("[LoadSetHTTP] Set not loaded from cache")
 	}
 }