First commit

pkg/obitax/path.go

@@ -0,0 +1,36 @@
+package obitax
+
+import (
+	"errors"
+	"fmt"
+)
+
+func (taxon *TaxNode) Path() (*TaxonSlice, error) {
+
+	path := make(TaxonSlice, 0, 30)
+	path = append(path, taxon)
+
+	for taxon != taxon.pparent {
+		taxon = taxon.pparent
+
+		if taxon == nil {
+			return nil, errors.New(fmt.Sprint("Taxonomy must be reindexed"))
+		}
+
+		path = append(path, taxon)
+	}
+
+	return &path, nil
+}
+
+// Returns a TaxonSet listing the requested taxon and all
+// its ancestors in the taxonomy down to the root.
+func (taxonomy *Taxonomy) Path(taxid int) (*TaxonSlice, error) {
+	taxon, err := taxonomy.Taxon(taxid)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return taxon.Path()
+}