Added arn to the main repository

arn/Nyaa.go

@@ -0,0 +1,48 @@
+package arn
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+type nyaaAnimeProvider struct{}
+
+// Nyaa anime provider (singleton)
+var Nyaa = new(nyaaAnimeProvider)
+
+var nyaaInvalidCharsRegex = regexp.MustCompile(`[^[:alnum:]!']`)
+var nyaaTVRegex = regexp.MustCompile(` \(?TV\)?`)
+
+// GetLink retrieves the Nyaa title for the given anime
+func (nyaa *nyaaAnimeProvider) GetLink(anime *Anime, additionalSearchTerm string) string {
+	searchTitle := nyaa.GetTitle(anime) + "+" + additionalSearchTerm
+	searchTitle = strings.Replace(searchTitle, " ", "+", -1)
+
+	quality := ""
+	subs := ""
+
+	nyaaSuffix := fmt.Sprintf("?f=0&c=1_2&q=%s+%s+%s&s=seeders&o=desc", searchTitle, quality, subs)
+	nyaaSuffix = strings.Replace(nyaaSuffix, "++", "+", -1)
+
+	return "https://nyaa.si/" + nyaaSuffix
+}
+
+// GetTitle retrieves the Nyaa title for the given anime
+func (nyaa *nyaaAnimeProvider) GetTitle(anime *Anime) string {
+	return nyaa.BuildTitle(anime.Title.Canonical)
+}
+
+// BuildTitle tries to create a title for use on Nyaa
+func (nyaa *nyaaAnimeProvider) BuildTitle(title string) string {
+	if title == "" {
+		return ""
+	}
+
+	title = nyaaInvalidCharsRegex.ReplaceAllString(title, " ")
+	title = nyaaTVRegex.ReplaceAllString(title, "")
+	title = strings.Replace(title, "  ", " ", -1)
+	title = strings.TrimSpace(title)
+
+	return title
+}