func (this *GenericUserBasedRecommender) getAllOtherItemIds(neighborhoods []uint64, userId uint64) ([]uint64, error) {
possibleIdSet := utils.IdSet{}
for _, uid := range neighborhoods {
userPrefs, err := this.dataModel.GetUserPreferences(uid)
if err != nil {
continue
}
possibleIdSet.AddArray(userPrefs.Ids())
}
userPrefs, err := this.dataModel.GetUserPreferences(userId)
if err != nil {
return nil, err
}
possibleIdSet.RemoveArray(userPrefs.Ids())
return possibleIdSet.ToArray(), nil
}
func (this *GenericItemBasedRecommender) getAllOtherItemIds(preferredItemIds []uint64, dataModel model.DataModel) ([]uint64, error) {
possibleIdSet := utils.IdSet{}
for _, itemId := range preferredItemIds {
itemPrefs, err := dataModel.GetItemPreferences(itemId)
if err != nil {
continue
}
for _, uid := range itemPrefs.Ids() {
up, err := dataModel.GetUserPreferences(uid)
if err != nil {
continue
}
possibleIdSet.AddArray(up.Ids())
}
}
possibleIdSet.RemoveArray(preferredItemIds)
return possibleIdSet.ToArray(), nil
}