add structure

lib/vo/document_log.dart

@@ -0,0 +1,79 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+
+import 'buyer.dart';
+import 'do.dart';
+import 'po.dart';
+import 'role.dart';
+import 'user.dart';
+
+class DocLog {
+  String id;
+  String docID;
+  String docType;
+  String ownerID;
+  String ownerName;
+  DateTime date;
+  String actionerID;
+  String actionerName;
+
+  Map<dynamic, dynamic> docData;
+
+  String data;
+
+  String getDesc(List<Privilege> privileges) {
+    if (docType == "po") {
+      return getPO().status;
+    } else if (docType == "do") {
+      return getDO().status;
+    } else if (docType == "buyer") {
+      return getBuyer().status;
+    } else if (docType == "user") {
+      User user=getUser();
+      return "${user.status}\nprivileges:${user.getLogDesc(privileges)}";
+    }
+    return "-";
+  }
+
+  DocLog(
+      {this.id,
+      this.docID,
+      this.docType,
+      this.date,
+      this.ownerID,
+      this.ownerName,
+      this.actionerID,
+      this.actionerName,
+      this.docData});
+
+  factory DocLog.fromMap(Map<String, dynamic> map, String id) {
+    var date = (map['date'] as Timestamp);
+
+    return DocLog(
+      id: id,
+      docID: map['doc_id'],
+      docType: map['doc_type'],
+      ownerID: map['owner_id'],
+      ownerName: map['owner_name'],
+      actionerID: map['actioner_id'],
+      actionerName: map['actioner_name'],
+      date: date == null ? null : date.toDate(),
+      docData: map['doc_data'],
+    );
+  }
+
+  Buyer getBuyer() {
+    return Buyer.fromMap(docData.cast<String, dynamic>(), docID);
+  }
+
+  POSubmission getPO() {
+    return POSubmission.fromMap(docData.cast<String, dynamic>(), docID);
+  }
+
+  DOSubmission getDO() {
+    return DOSubmission.fromMap(docData.cast<String, dynamic>(), docID);
+  }
+
+  User getUser() {
+    return User.fromMap(docData.cast<String, dynamic>(), docID);
+  }
+}