Added MAL diffs

pages/editor/mal.go

@@ -0,0 +1,101 @@
+package editor
+
+import (
+	"sort"
+
+	"github.com/OneOfOne/xxhash"
+	"github.com/aerogo/aero"
+	"github.com/animenotifier/arn"
+	"github.com/animenotifier/mal"
+	"github.com/animenotifier/notify.moe/components"
+	"github.com/animenotifier/notify.moe/utils"
+)
+
+const maxCompareMALEntries = 10
+
+// CompareMAL ...
+func CompareMAL(ctx *aero.Context) string {
+	user := utils.GetUser(ctx)
+	year, _ := ctx.GetInt("year")
+	animeType := ctx.Get("type")
+
+	animes := arn.FilterAnime(func(anime *arn.Anime) bool {
+		if year != 0 && year != anime.StartDateTime().Year() {
+			return false
+		}
+
+		if animeType != "" && anime.Type != animeType {
+			return false
+		}
+
+		return anime.GetMapping("myanimelist/anime") != ""
+	})
+
+	sort.Slice(animes, func(i, j int) bool {
+		a := animes[i]
+		b := animes[j]
+
+		aPop := a.Popularity.Total()
+		bPop := b.Popularity.Total()
+
+		if aPop == bPop {
+			return a.Title.Canonical < b.Title.Canonical
+		}
+
+		return aPop > bPop
+	})
+
+	comparisons := []*utils.MALComparison{}
+	malAnimeCollection := arn.MAL.Collection("Anime")
+
+	for _, anime := range animes {
+		malID := anime.GetMapping("myanimelist/anime")
+		obj, err := malAnimeCollection.Get(malID)
+
+		if err != nil {
+			continue
+		}
+
+		malAnime := obj.(*mal.Anime)
+		var differences []utils.AnimeDiff
+
+		sumA := uint64(0)
+
+		for _, genre := range anime.Genres {
+			h := xxhash.NewS64(0)
+			h.Write([]byte(genre))
+			numHash := h.Sum64()
+			sumA += numHash
+		}
+
+		sumB := uint64(0)
+
+		for _, genre := range malAnime.Genres {
+			h := xxhash.NewS64(0)
+			h.Write([]byte(genre))
+			numHash := h.Sum64()
+			sumB += numHash
+		}
+
+		if sumA != sumB {
+			differences = append(differences, &utils.AnimeGenresDiff{
+				GenresA: anime.Genres,
+				GenresB: malAnime.Genres,
+			})
+		}
+
+		if len(differences) > 0 {
+			comparisons = append(comparisons, &utils.MALComparison{
+				Anime:       anime,
+				MALAnime:    malAnime,
+				Differences: differences,
+			})
+
+			if len(comparisons) >= maxCompareMALEntries {
+				break
+			}
+		}
+	}
+
+	return ctx.HTML(components.CompareMAL(comparisons, user))
+}