Core.cs 17 KB

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  1. using FastReport.Data;
  2. using FastReport.Forms;
  3. using FastReport.Utils;
  4. using System;
  5. using System.Collections.Generic;
  6. using System.Data;
  7. using System.Data.Common;
  8. using System.Windows.Forms;
  9. namespace FastReport.FastQueryBuilder
  10. {
  11. internal class Core
  12. {
  13. private IQueryDesigner queryDesigner;
  14. private DataBase dataBase;
  15. private DialogResult dialogResult;
  16. private Query query = new Query();
  17. // unstable features
  18. private bool unstableFeatures;
  19. private bool unstableFeaturesForce;
  20. public Core(IQueryDesigner qd, DataBase db)
  21. {
  22. unstableFeatures = true;
  23. dataBase = db;
  24. queryDesigner = qd;
  25. queryDesigner.OnOk += OnOk;
  26. queryDesigner.OnCancel += OnCancel;
  27. queryDesigner.OnGetTableList += OnGetTableList;
  28. queryDesigner.OnAddTable += OnAddTable;
  29. queryDesigner.OnGenerateSQL += OnGenerateSQL;
  30. queryDesigner.OnRunSQL += OnRunSQL;
  31. queryDesigner.Fields = query.SelectedFields;
  32. queryDesigner.Groups = query.GroupedFields;
  33. queryDesigner.Links = query.LinkList;
  34. }
  35. public bool UseJoin { get; set; } = true;
  36. public DialogResult DesignQuery()
  37. {
  38. queryDesigner.DesignQuery();
  39. return dialogResult;
  40. }
  41. private void OnOk(object sender, EventArgs e)
  42. {
  43. dialogResult = DialogResult.OK;
  44. queryDesigner.Close();
  45. }
  46. private void OnCancel(object sender, EventArgs e)
  47. {
  48. dialogResult = DialogResult.Cancel;
  49. queryDesigner.Close();
  50. }
  51. private void OnGetTableList(object sender, EventArgs e)
  52. {
  53. queryDesigner.DoFillTableList(dataBase.TableList);
  54. }
  55. private Table FindTable(List<Table> list, string tableName)
  56. {
  57. foreach (Table table in list)
  58. {
  59. if (table.Name == tableName)
  60. return table;
  61. }
  62. return null;
  63. }
  64. private void OnAddTable(object sender, AddTableEventArgs e)
  65. {
  66. Table tbl = (Table)e.table.Clone();
  67. tbl.Alias = GetUniqueAlias(tbl, e.alias);
  68. query.TableList.Add(tbl);
  69. var tv = queryDesigner.DoAddTable(tbl, e.position);
  70. tv.OnAddLink += OnAddLink;
  71. tv.OnSelectField += OnSelectField;
  72. tv.OnDeleteTable += OnDeleteTable;
  73. e.tableView = tv;
  74. }
  75. private Field FindSelectedField(SqlParser.FieldStruct fs)
  76. {
  77. foreach (Field f in query.SelectedFields)
  78. {
  79. if ((f.Table.Alias == fs.Table || f.Table.Name == fs.Table) && FieldEqFieldStruct(f, fs))
  80. {
  81. return f;
  82. }
  83. }
  84. return null;
  85. }
  86. private Field FindField(SqlParser.FieldStruct fs)
  87. {
  88. foreach (Table t in query.TableList)
  89. {
  90. if (t.Name == fs.Table || t.Alias == fs.Table)
  91. {
  92. foreach (Field f in t.FieldList)
  93. {
  94. if (FieldEqFieldStruct(f, fs))
  95. return f;
  96. }
  97. }
  98. }
  99. return null;
  100. }
  101. private bool FieldEqFieldStruct(Field f, SqlParser.FieldStruct fs)
  102. {
  103. return f.Name == fs.Name ||
  104. !String.IsNullOrEmpty(f.Alias) && f.Alias == fs.Name ||
  105. !String.IsNullOrEmpty(fs.Alias) && f.Name == fs.Alias ||
  106. !String.IsNullOrEmpty(f.Alias) && !String.IsNullOrEmpty(fs.Alias) && f.Alias == fs.Alias;
  107. }
  108. private bool hasDuplicate(string alias)
  109. {
  110. foreach (Table t in query.TableList)
  111. {
  112. if (t.Alias == alias)
  113. return true;
  114. }
  115. return false;
  116. }
  117. private string GetUniqueAlias(Table tbl, string al)
  118. {
  119. if (string.IsNullOrEmpty(al))
  120. {
  121. al = tbl.Name[0].ToString().ToUpper();
  122. if (al[0] < 'A' || al[0] > 'Z')
  123. al = "A";
  124. }
  125. int n = 1;
  126. while (hasDuplicate(al))
  127. {
  128. al = tbl.Name[0] + n.ToString();
  129. n++;
  130. }
  131. return al;
  132. }
  133. private void OnDeleteTable(object sender, AddTableEventArgs e)
  134. {
  135. for (int i = query.SelectedFields.Count - 1; i >= 0; i--)
  136. {
  137. if (query.SelectedFields[i].Table == e.table)
  138. query.SelectedFields.RemoveAt(i);
  139. }
  140. query.DeleteTable(e.table);
  141. queryDesigner.Fields = query.SelectedFields;
  142. }
  143. private void OnAddLink(object sender, AddLinkEventArgs e)
  144. {
  145. Link lnk;
  146. if (LinkHasFrom(query.LinkList, e.fieldTo.Table))
  147. lnk = new Link(e.fieldTo, e.fieldFrom);
  148. else
  149. lnk = new Link(e.fieldFrom, e.fieldTo);
  150. if (LinkHas(query.LinkList, lnk))
  151. return;
  152. if (!e.useDefaults)
  153. {
  154. lnk.Join = e.joinType;
  155. lnk.Where = e.whereType;
  156. }
  157. else
  158. {
  159. lnk.Join = UseJoin ? QueryEnums.JoinTypes.InnerJoin : QueryEnums.JoinTypes.Where;
  160. lnk.Where = QueryEnums.WhereTypes.Equal;
  161. }
  162. query.LinkList.Add(lnk);
  163. }
  164. private bool LinkHas(List<Link> list, Link lnk)
  165. {
  166. foreach (Link link in list)
  167. {
  168. if (link.From == lnk.From && link.To == lnk.To)
  169. return true;
  170. }
  171. return false;
  172. }
  173. private bool LinkHasFrom(List<Link> list, Table from)
  174. {
  175. foreach (Link link in list)
  176. {
  177. if (link.From.Table == from)
  178. return true;
  179. }
  180. return false;
  181. }
  182. private void OnSelectField(object sender, CheckFieldEventArgs e)
  183. {
  184. if (e.value)
  185. {
  186. query.SelectedFields.Add(e.field);
  187. }
  188. else
  189. {
  190. query.SelectedFields.Remove(e.field);
  191. }
  192. queryDesigner.Fields = query.SelectedFields;
  193. }
  194. private void OnGenerateSQL(object sender, EventArgs e)
  195. {
  196. var sqlGen = new SQLGenerator(query);
  197. sqlGen.qch = dataBase.GetQuotationChars();
  198. queryDesigner.SQLText = sqlGen.getSql();
  199. #region Debug
  200. //queryDesigner.SQLText += "\n\n\n\n/*Tables:\n";
  201. //foreach (Table tbl in query.TableList)
  202. //{
  203. // queryDesigner.SQLText += tbl.Name + "\n";
  204. //}
  205. //queryDesigner.SQLText += "\nLinks:\n";
  206. //foreach (Link lnk in query.LinkList)
  207. //{
  208. // queryDesigner.SQLText += lnk.From.Table + ":" + lnk.From.Name + " => " + lnk.To.Table + ":" + lnk.To.Name + "\n";
  209. //}
  210. //queryDesigner.SQLText += "\nFields:\n";
  211. //foreach (Field fld in query.SelectedFields)
  212. //{
  213. // queryDesigner.SQLText += fld.Table.ToString() + '.' + fld.Name + "\n";
  214. //}
  215. //queryDesigner.SQLText += "*/";
  216. #endregion
  217. }
  218. private void OnRunSQL(object sender, EventArgs e)
  219. {
  220. var sqlGen = new SQLGenerator(query);
  221. sqlGen.qch = dataBase.GetQuotationChars();
  222. string sql = string.IsNullOrEmpty(queryDesigner.SQLText) ? sqlGen.getSql() : queryDesigner.SQLText;
  223. DataTable table = new DataTable();
  224. DataConnectionBase dataConnection = dataBase.dataBase;
  225. DbConnection conn = dataConnection.GetConnection();
  226. try
  227. {
  228. dataConnection.OpenConnection(conn);
  229. using (DbDataAdapter adapter = dataConnection.GetAdapter(sql, conn, new CommandParameterCollection(null)))
  230. {
  231. table.Clear();
  232. adapter.Fill(table);
  233. }
  234. }
  235. finally
  236. {
  237. dataConnection.DisposeConnection(conn);
  238. }
  239. queryDesigner.DataSource = table;
  240. }
  241. public string GetSql()
  242. {
  243. if (string.IsNullOrEmpty(queryDesigner.SQLText))
  244. OnGenerateSQL(null, null);
  245. return queryDesigner.SQLText;
  246. }
  247. public void SetSql(string sql)
  248. {
  249. if (unstableFeatures && !string.IsNullOrEmpty(sql))
  250. {
  251. var parser = new SqlParser(sql);
  252. parser.qch = dataBase.GetQuotationChars();
  253. var tableViews = new List<ITableView>();
  254. try
  255. {
  256. parser.Parse();
  257. List<Table> tables = dataBase.TableList;
  258. // add tables
  259. foreach (SqlParser.TableStruct t in parser.Tables)
  260. {
  261. if (!unstableFeatures)
  262. break;
  263. Table table = FindTable(tables, t.Name);
  264. if (table != null)
  265. {
  266. var args = new AddTableEventArgs(table, System.Drawing.Point.Empty, t.Alias);
  267. OnAddTable(queryDesigner, args);
  268. tableViews.Add(args.tableView);
  269. }
  270. else
  271. {
  272. ShowError(new FormatException("Table " + t.Name + " is not found!"));
  273. }
  274. }
  275. if (unstableFeatures)
  276. {
  277. // select fields
  278. foreach (SqlParser.FieldStruct fs in parser.Fields)
  279. {
  280. if (!unstableFeatures)
  281. break;
  282. string tableName = fs.Table;
  283. foreach (ITableView tv in tableViews)
  284. {
  285. if (!unstableFeatures)
  286. break;
  287. Table tbl = tv.Table;
  288. if (tbl.Name == tableName || tbl.Alias == tableName)
  289. {
  290. if (!tv.SelectCheckBox(fs.Name, fs.Func, fs.Alias))
  291. ShowError(new FormatException("Field " + fs.Name + " is not found!"));
  292. break;
  293. }
  294. }
  295. }
  296. foreach (SqlParser.FieldStruct fs in parser.Where)
  297. {
  298. if (!unstableFeatures)
  299. break;
  300. Field f = FindSelectedField(fs);
  301. if (f == null)
  302. {
  303. ShowError(new FormatException("Field " + fs.Name + " is not found!"));
  304. }
  305. else
  306. {
  307. f.Filter = fs.Filter;
  308. }
  309. }
  310. foreach (SqlParser.FieldStruct fs in parser.Groups)
  311. {
  312. if (!unstableFeatures)
  313. break;
  314. Field f = FindSelectedField(fs);
  315. if (f == null)
  316. {
  317. ShowError(new FormatException("Field " + fs.Name + " is not found!"));
  318. }
  319. else
  320. {
  321. f.Group = true;
  322. query.GroupedFields.Add(f);
  323. }
  324. }
  325. foreach (SqlParser.FieldStruct fs in parser.Orders)
  326. {
  327. if (!unstableFeatures)
  328. break;
  329. Field f = FindSelectedField(fs);
  330. if (f == null)
  331. {
  332. ShowError(new FormatException("Field " + fs.Name + " is not found!"));
  333. }
  334. else
  335. {
  336. switch (fs.SortType)
  337. {
  338. case SortTypes.Asc:
  339. f.Order = "Asc";
  340. break;
  341. case SortTypes.Desc:
  342. f.Order = "Desc";
  343. break;
  344. }
  345. }
  346. }
  347. }
  348. if (unstableFeatures)
  349. {
  350. foreach (SqlParser.LinkStruct ls in parser.Links)
  351. {
  352. if (!unstableFeatures)
  353. break;
  354. Field fieldFrom = FindField(ls.One);
  355. Field fieldTo = FindField(ls.Two);
  356. if (fieldFrom == null)
  357. {
  358. ShowError(new FormatException("Field " + ls.One + " is not found!"));
  359. }
  360. if (fieldTo == null)
  361. {
  362. ShowError(new FormatException("Field " + ls.Two + " is not found!"));
  363. }
  364. if (fieldFrom != null && fieldTo != null)
  365. OnAddLink(queryDesigner, new AddLinkEventArgs(fieldFrom, fieldTo, ls.JoinType, ls.WhereType));
  366. }
  367. }
  368. if (unstableFeatures && !unstableFeaturesForce)
  369. {
  370. var sqlGen = new SQLGenerator(query);
  371. sqlGen.qch = dataBase.GetQuotationChars();
  372. string newSql = sqlGen.getSql();
  373. var lexerOld = new SqlLexer(sql, sqlGen.qch);
  374. var lexerNew = new SqlLexer(newSql, sqlGen.qch);
  375. var tokensOld = lexerOld.Parse();
  376. var tokensNew = lexerNew.Parse();
  377. bool isSqlEquals = true;
  378. if (tokensOld.Count != tokensNew.Count)
  379. {
  380. isSqlEquals = false;
  381. }
  382. else
  383. {
  384. for (int i = 0; i < tokensOld.Count; i++)
  385. {
  386. if (!tokensOld[i].Equals(tokensNew[i]))
  387. {
  388. isSqlEquals = false;
  389. break;
  390. }
  391. }
  392. }
  393. if (!isSqlEquals)
  394. ShowError(new Exception("Sql is not equals"));
  395. }
  396. if (!unstableFeatures)
  397. {
  398. query.LinkList.Clear();
  399. query.SelectedFields.Clear();
  400. query.GroupedFields.Clear();
  401. query.TableList.Clear();
  402. queryDesigner.Clear();
  403. queryDesigner.Fields = query.SelectedFields;
  404. }
  405. }
  406. catch (Exception e)
  407. {
  408. ShowError(e);
  409. }
  410. }
  411. }
  412. private void ShowError(Exception e)
  413. {
  414. #if DEBUG
  415. ExceptionForm form = new ExceptionForm(e);
  416. form.ShowDialog();
  417. #endif
  418. if (unstableFeatures && !unstableFeaturesForce)
  419. {
  420. switch (MessageBox.Show(Res.Get("Forms,QueryBuilder,QueryIsCorrupted"),
  421. Res.Get("Forms,QueryBuilder,QueryIsCorruptedTitle"),
  422. MessageBoxButtons.YesNo, MessageBoxIcon.Warning))
  423. {
  424. case DialogResult.Yes:
  425. unstableFeaturesForce = true;
  426. break;
  427. case DialogResult.No:
  428. unstableFeatures = false;
  429. break;
  430. }
  431. }
  432. }
  433. }
  434. }