Added joined groups page

pages/groups/joined.go

@@ -0,0 +1,31 @@
+package groups
+
+import (
+	"net/http"
+	"sort"
+
+	"github.com/animenotifier/notify.moe/utils"
+
+	"github.com/aerogo/aero"
+)
+
+// Joined shows the most popular joined groups.
+func Joined(ctx *aero.Context) string {
+	user := utils.GetUser(ctx)
+
+	if user == nil {
+		return ctx.Error(http.StatusUnauthorized, "Not logged in")
+	}
+
+	groups := fetchGroups(user.ID)
+
+	// Sort by join date
+	sort.Slice(groups, func(i, j int) bool {
+		aMember := groups[i].FindMember(user.ID)
+		bMember := groups[j].FindMember(user.ID)
+
+		return aMember.Joined > bMember.Joined
+	})
+
+	return render(ctx, groups)
+}