refactor audit code

src/audit_db.go

@@ -53,6 +53,12 @@ func (event auditEvent) submit(db dbcon) {
 	if len(event.Who) > 0 {
 		bdoc["who"] = event.Who
 	}
+	if len(event.Mode) > 0 {
+		bdoc["mode"] = event.Mode
+	}
+	if len(event.Identity) > 0 {
+		bdoc["identity"] = event.Identity
+	}
 	if len(event.Record) > 0 {
 		bdoc["record"] = event.Record
 	}

src/qldb.go

@@ -746,8 +746,10 @@ func initAudit(db *sql.DB) error {
 	defer tx.Rollback()
 	_, err = tx.Exec(`
 	CREATE TABLE IF NOT EXISTS audit (
+	  identity STRING,
 	  record STRING,
 	  who STRING,
+	  mode STRING,
 	  app STRING,
 	  title STRING,
 	  status STRING,

ui/site/user-audit.html

@@ -86,7 +86,9 @@
           <thead>
             <tr>
               <th scope="col" data-field="when" data-formatter="dateFormat">when</th>
-              <th scope="col" data-field="who">Who</th>
+              <th scope="col" data-field="itentity">Identity</th>
+              <th scope="col" data-field="who">Target</th>
+              <th scope="col" data-field="mode">Mode</th>
               <th scope="col" data-field="app">App</th>
               <th scope="col" data-field="title">Title</th>
               <th scope="col" data-field="status">Status</th>