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package genre
import (
"strings"
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"github.com/aerogo/aero"
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"github.com/animenotifier/notify.moe/arn"
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"github.com/animenotifier/notify.moe/components"
)
const animePerPage = 100
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const animeRatingCountThreshold = 5
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// Get renders the genre page.
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func Get(ctx aero.Context) error {
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user := arn.GetUserFromContext(ctx)
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genreName := ctx.Get("name")
animes := []*arn.Anime{}
for anime := range arn.StreamAnime() {
if containsLowerCase(anime.Genres, genreName) {
animes = append(animes, anime)
}
}
userScore := averageUserScore(user, animes)
userCompleted := totalCompleted(user, animes)
globalScore := averageGlobalScore(animes)
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arn.SortAnimeByQuality(animes)
if len(animes) > animePerPage {
animes = animes[:animePerPage]
}
return ctx.HTML(components.Genre(genreName, animes, user, userScore, userCompleted, globalScore))
}
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// containsLowerCase tells you whether the given element exists when all elements are lowercased.
func containsLowerCase(array []string, search string) bool {
for _, item := range array {
if strings.ToLower(item) == search {
return true
}
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}
return false
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}
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// averageUserScore counts the user's average score for a list of anime.
func averageUserScore(user *arn.User, animes []*arn.Anime) float64 {
if user == nil {
return 0
}
count := 0.0
scores := 0.0
animeList := user.AnimeList()
for _, anime := range animes {
userAnime := animeList.Find(anime.ID)
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if userAnime != nil && !userAnime.Rating.IsNotRated() {
scores += userAnime.Rating.Overall
count++
}
}
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if count == 0.0 {
return 0
}
return scores / count
}
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// averageGlobalScore returns the average overall score for the given anime.
func averageGlobalScore(animes []*arn.Anime) float64 {
sum := 0.0
count := 0
for _, anime := range animes {
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if anime.Rating.Count.Overall >= animeRatingCountThreshold {
sum += anime.Rating.Overall
count++
}
}
return sum / float64(count)
}
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// totalCompleted counts the number of anime the user has completed from a given list of anime.
func totalCompleted(user *arn.User, animes []*arn.Anime) int {
if user == nil {
return 0
}
count := 0
completedList := user.AnimeList().FilterStatus(arn.AnimeListStatusCompleted)
for _, anime := range animes {
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if completedList.Contains(anime.ID) {
count++
}
}
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return count
}