Asset-App/lib/util/dbHandler.dart

import 'package:assetstock/util/Models.dart';
import 'package:sqflite/sqflite.dart';
import 'package:path_provider/path_provider.dart';
import 'prefsKey.dart';
import 'dart:io';
import 'dart:async';
import 'package:path/path.dart';

class DBHelper{
  DBHelper._();

  static final DBHelper database = DBHelper._();
  Database _db;

  Future<Database> get db async {
    if (_db != null) return _db;
    _db = await initDb();
    return _db;
  }

  initDb() async {
    Directory documentsDirectory = await getApplicationDocumentsDirectory();
    String path = join(documentsDirectory.path, "assets.db");
    var theDb = await openDatabase(path, version: 1,onCreate: _onCreate);
    return theDb;
  }
  closeDb() async {
    if(_db!=null){
      final database = await db;
      await database.close();
      _db = null;
    }
  }

  void _onCreate(Database db, int version) async {
    Directory documentsDirectory = await getApplicationDocumentsDirectory();
    String path = join(documentsDirectory.path, "assets.db");
    File file = File(path);
    print('Database created, ${file.lengthSync()}');
  }

  insertAsset(Asset newAsset) async{
    try{
      final database = await db;
      await database.rawInsert("Insert into ${tableName.insert} (${columnName.tag_number},${columnName.blob},${columnName.keterangan}) VALUES(?,?,?)", [newAsset.tag_number,newAsset.blob,newAsset.keterangan]);
      await database.rawQuery("UPDATE ${tableName.ref} SET ${columnName.flag} = 'TRUE' WHERE ${columnName.tag_number} = '${newAsset.tag_number}'");
      return true;
    }
    catch(e){
      print(e);
      return null;
    }
  }

  updateAsset(Asset newAsset) async{
    try{
      final database = await db;
      await database.rawUpdate("Update ${tableName.insert} SET  ${columnName.blob} = ?, ${columnName.tag_number} = ?, ${columnName.keterangan} = ? WHERE ${columnName.no} = ?", [newAsset.blob,newAsset.tag_number,newAsset.keterangan,newAsset.no]);
      return true;
    }
    catch(e){
      print(e);
      return null;
    }
  }

  
  getBlobbyNo(no) async{
    try{
      final database = await db;
      var res = await database.query(tableName.insert,where: "${columnName.no} = ?",whereArgs: [no]);
//      var a = await database.rawQuery("select length(${columnName.blob}) / 1024 from ${tableName.insert} where ${columnName.no} = $no");
//      print(a);
      return res.isNotEmpty ? Asset.fromJson(res.first): null;
    }
    catch(e){
      print(e);
      return null;
    }
  }
  getRefBlob(tagNumber)async{
    try{
      final database = await db;
      var res = await database.query(tableName.ref,where: "${columnName.tag_number} = ?",whereArgs: [tagNumber]);
//      var a = await database.rawQuery("select length(${columnName.blob}) / 1024 from ${tableName.insert} where ${columnName.no} = $no");
//      print(a);
      return res.isNotEmpty ? Asset.fromJson(res.first): null;
    }
    catch(e){
      print(e);
      return null;
    }
  }
  searchbyTagNumber(tagNumber) async{
    try{
      final database = await db;
      var exist = await database.query(tableName.insert,where: "${columnName.tag_number} = ?",whereArgs: [tagNumber]);
      var res = await database.query(tableName.ref,where: "${columnName.tag_number} = ?",whereArgs: [tagNumber]);
      if(res.isEmpty&&exist.isNotEmpty){
        var appendAsset = new Asset();
        appendAsset.tag_number=tagNumber;
        return {"EXIST":exist.isNotEmpty?true:false,"DATA":appendAsset};
      }
      else return {"EXIST":exist.isNotEmpty?true:false,"DATA":res.isNotEmpty ? Asset.fromJson(res.first): null};
    }
    catch(e){
      print(e);
      return null;
    }
  }

  getAllLocation() async{
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT Distinct UPPER(${columnName.lantai}) ${columnName.lantai} from ${tableName.ref} ORDER BY UPPER(${columnName.lantai})");
      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList().reversed.toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }
  getAllRuangan() async{
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT Distinct UPPER(${columnName.ruang}) ${columnName.ruang} from ${tableName.ref} ORDER BY UPPER(${columnName.ruang})");
      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList().reversed.toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }

  getLantaiRuangan(lantai) async{
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT Distinct UPPER(${columnName.ruang}) ${columnName.ruang} from ${tableName.ref} WHERE UPPER(${columnName.lantai}) = UPPER('$lantai') ORDER BY UPPER(${columnName.ruang})");
      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList().reversed.toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }


  getAllAsset() async {
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT a.${columnName.tag_number}, a.${columnName.asset_desc}, a.${columnName.ruang}, a.${columnName.lantai}, a.${columnName.gedung}, a.${columnName.flag}, b.${columnName.blob} from ${tableName.ref} a LEFT JOIN ${tableName.insert} b on a.${columnName.tag_number} = b.${columnName.tag_number} ORDER BY a.${columnName.flag},a.${columnName.ruang}");
      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }

  filterAllAsset(search) async {
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT * FROM (SELECT a.${columnName.tag_number}, a.${columnName.asset_desc}, a.${columnName.ruang}, a.${columnName.lantai}, a.${columnName.gedung}, a.${columnName.flag}, b.${columnName.blob} from ${tableName.ref} a LEFT JOIN ${tableName.insert} b on a.${columnName.tag_number} = b.${columnName.tag_number}) WHERE UPPER(${columnName.tag_number}) Like '%$search%' ORDER BY ${columnName.flag},${columnName.ruang}");
      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }

  getAllInsertAsset() async {
    try{
      final database = await db;
      // var res = await database.rawQuery("SELECT a.*, b.${columnName.asset_desc}, b.${columnName.gedung}, b.${columnName.lantai}, b.${columnName.ruang} FROM ${tableName.insert} a, ${tableName.ref} b WHERE a.${columnName.tag_number} = b.${columnName.tag_number}");
      var res = await database.rawQuery("select a.*, b.${columnName.asset_desc}, b.${columnName.gedung}, b.${columnName.lantai}, b.${columnName.ruang} from ${tableName.insert} a LEFT JOIN ${tableName.ref} b ON a.${columnName.tag_number} = b.${columnName.tag_number}");

      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }
  
  deleteInsertAsset(no) async{
    try{
      final database = await db;
      // await database.rawUpdate("Update ${tableName.insert} SET  ${columnName.blob} = ?, ${columnName.tag_number} = ?, ${columnName.keterangan} = ? WHERE ${columnName.no} = ?", [newAsset.blob,newAsset.tag_number,newAsset.keterangan,newAsset.no]);
      await database.delete(tableName.insert,where: "${columnName.no} = ?",whereArgs: [no]);
      return true;
    }
    catch(e){
      print(e);
      return null;
    }
  }

  filterAllInsertAsset(search) async {
    try{
      final database = await db;
      // var res = await database.rawQuery("SELECT * FROM (SELECT a.${columnName.no},a.${columnName.keterangan},a.${columnName.tag_number},a.${columnName.blob}, b.${columnName.asset_desc}, b.${columnName.gedung}, b.${columnName.lantai}, b.${columnName.ruang} FROM ${tableName.insert} a, ${tableName.ref} b WHERE a.${columnName.tag_number} = b.${columnName.tag_number}) WHERE UPPER(${columnName.tag_number}) Like '%$search%'");
      var res = await database.rawQuery("SELECT * FROM (select a.*, b.${columnName.asset_desc}, b.${columnName.gedung}, b.${columnName.lantai}, b.${columnName.ruang} from ${tableName.insert} a LEFT JOIN ${tableName.ref} b ON a.${columnName.tag_number} = b.${columnName.tag_number}) WHERE UPPER(${columnName.tag_number}) Like '%$search%'");

      List<Asset> list =
      res.isNotEmpty ? res.map((c) => Asset.fromJson(c)).toList() : [];
      return list;
    }
    catch(e){
      print(e);
      return null;
    }
  }
  countRows(tableName)async{
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT Count(*) Count FROM $tableName");
      return res.isEmpty?0:Count.fromJson(res.first).count;
    }
    catch(e){
      print(e);
      return null;
    }
  }
  getDbName()async{
    try{
      final database = await db;
      var res = await database.rawQuery("SELECT ${columnName.value} FROM ${tableName.key} where ${columnName.key} = 'DB_MASTER_NAME'");
      return res.isEmpty?null:res.first[columnName.value];
    }
    catch(e){
      print(e);
      return null;
    }
  }

}