// Add adds a new dataset to the database.
func (d *datasets) add(set *jdh.Dataset) (string, error) {
id := strconv.FormatUint(d.next, 10)
set.Id = id
if err := d.validate(set); err != nil {
return "", err
}
d.addSet(set)
d.next++
d.changed = true
return id, nil
}
// Validates that a dataset is valid in the database. When posible canonical
// values will be set. If the dataset is invalid it will return an error.
func (d *datasets) validate(set *jdh.Dataset) error {
set.Id = strings.TrimSpace(set.Id)
set.Title = strings.Join(strings.Fields(set.Title), " ")
if (len(set.Id) == 0) || (len(set.Title) == 0) {
return errors.New("dataset without identification")
}
if _, ok := d.ids[set.Id]; ok {
return fmt.Errorf("dataset id %s already in use", set.Id)
}
set.Citation = strings.Join(strings.Fields(set.Citation), " ")
set.License = strings.Join(strings.Fields(set.License), " ")
if u, err := url.Parse(set.Url); err != nil {
set.Url = ""
} else {
set.Url = u.String()
}
ext := set.Extern
set.Extern = nil
for _, e := range ext {
serv, id, err := jdh.ParseExtern(e)
if err != nil {
continue
}
if len(id) == 0 {
continue
}
add := true
for _, ex := range set.Extern {
if strings.HasPrefix(ex, serv) {
add = false
break
}
}
if !add {
continue
}
if _, ok := d.ids[e]; !ok {
set.Extern = append(set.Extern, e)
}
}
return nil
}