// Build builds the inventory using the JSON-encoded metadata files from the
// first level subdirectories of the named directory. Returns an error if the
// named directory is not a directory, or if it cannot be read.
func (i *Inventory) Build(name string) error {
if !util.IsDir(name) {
return fmt.Errorf("%s: not a directory", name)
}
entries, err := ioutil.ReadDir(name)
if err != nil {
return err
}
for _, entry := range entries {
mjson := filepath.Join(name, entry.Name(), "metadata.json")
if !(entry.IsDir() && util.Exists(mjson)) {
// No metadata file, skip entry.
// TODO: Add logging.
continue
}
metadata := new(font.Metadata)
if err := metadata.Read(mjson); err != nil {
// Invalid metadata file, skip font family.
// TODO: Add logging.
continue
}
fonts := metadata.Fonts()
for _, font := range fonts {
format := font.Format.String()
weight := strconv.Itoa(font.Weight)
columnKey := format + weight + font.Style
i.Put(font.Family, columnKey, font)
}
}
return nil
}
// Read reads and parses the JSON-encoded contents of the named file and stores
// the result in the whitelist.
// Returns an error if the named file cannot be read or correctly parsed.
func (w *Whitelist) Read(name string) error {
if util.IsDir(name) {
return fmt.Errorf("%s: is a directory", name)
}
if err := util.ReadJson(name, &w); err != nil {
return err
}
return nil
}