Initial commit

pkg/metadata/default.go

@@ -0,0 +1,45 @@
+package metadata
+
+import (
+	"path"
+	"strings"
+	"time"
+)
+
+const defaultTimeLayout = "20060102_150405"
+
+// DefaultExtractor extract metadata from all file types, not covered by special extractors
+//
+// Gets the meta data from the file's name
+type DefaultExtractor struct {
+	Layout string
+}
+
+// NewDefaultExtractor returns new DefaultExtractor's instance
+func NewDefaultExtractor() *DefaultExtractor {
+	return &DefaultExtractor{Layout: defaultTimeLayout}
+}
+
+// NewDefaultExtractorWithLayout returns DefaultExtractor with custom time layout
+func NewDefaultExtractorWithLayout(l string) *DefaultExtractor {
+	return &DefaultExtractor{Layout: l}
+}
+
+// Extract returns Metadata from specified filename using its name to parse Time
+func (d *DefaultExtractor) Extract(fp string) (Metadata, error) {
+	_, fName := path.Split(fp)
+
+	// Remove extension
+	fName = strings.Replace(fName, path.Ext(fName), "", 1)
+
+	// If there more than one photo in one second, cameras append ~N to the end of file name (before extension)
+	if strings.ContainsRune(fName, '~') {
+		fName = fName[:strings.IndexRune(fName, '~')]
+	}
+
+	t, err := time.ParseInLocation(d.Layout, fName, time.Local)
+	if err != nil {
+		return Metadata{}, err
+	}
+	return Metadata{Time: t}, nil
+}