adding comment to document repository

src/internal/model/database/documentrepository.go

@@ -74,6 +74,9 @@ func (d *DocumentRepository) CountAll() (uint, error) {
 	return count, nil
 }
 
+// Update an document in the database. Will use the id that is set in the
+// document object as an reference to the database row. This may throw an error
+// if the connection to database fails.
 func (m *DocumentRepository) Update(d *model.Document) error {
 	stmt := `UPDATE documents 
              SET content = $1, summary = $2
@@ -83,6 +86,10 @@ func (m *DocumentRepository) Update(d *model.Document) error {
 	return err
 }
 
+// Will transform every document in the database given a transformation
+// function. Will load the document, parse it to the transform function and call
+// update on the returned document. May throw an error if the connection to the
+// database fails.
 func (d *DocumentRepository) Map(transform func(*model.Document) *model.Document) (int, error) {
 	processed := 0
 
@@ -100,7 +107,9 @@ func (d *DocumentRepository) Map(transform func(*model.Document) *model.Document
 		for _, doc := range docs {
 			new_doc := transform(doc)
 			err = d.Update(new_doc)
-            if err != nil { return processed, err }
+			if err != nil {
+				return processed, err
+			}
 			processed++
 		}
 	}