sql generator - basic concept

packages/tools/src/SqlGenerator.ts

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+import { DatabaseInfo, FunctionInfo, ProcedureInfo, TableInfo, ViewInfo } from 'dbgate-types';
+import { SqlDumper } from './SqlDumper';
+
+interface SqlGeneratorOptions {
+  dropTables: boolean;
+  checkIfTableExists: boolean;
+  dropReferences: boolean;
+  createTables: boolean;
+  createReferences: boolean;
+  createForeignKeys: boolean;
+  createIndexes: boolean;
+  insert: boolean;
+  skipAutoincrementColumn: boolean;
+  disableConstraints: boolean;
+  omitNulls: boolean;
+  truncate: boolean;
+}
+
+interface SqlGeneratorObject {
+  schemaName: string;
+  pureName: string;
+  objectTypeField: 'tables' | 'views' | 'procedures' | 'functions';
+}
+
+export class SqlGenerator {
+  private tables: TableInfo[];
+  private views: ViewInfo[];
+  private procedures: ProcedureInfo[];
+  private functions: FunctionInfo[];
+  constructor(
+    public dbinfo: DatabaseInfo,
+    public options: SqlGeneratorOptions,
+    public objects: SqlGeneratorObject[],
+    public dmp: SqlDumper
+  ) {
+    this.tables = this.extract('tables');
+    this.views = this.extract('views');
+    this.procedures = this.extract('procedures');
+    this.functions = this.extract('functions');
+  }
+
+  checkDumper() {
+    return false;
+  }
+
+  dump() {
+    if (this.options.createTables) {
+      for (const table of this.tables) {
+        this.dmp.createTable(table);
+        if (this.checkDumper()) return;
+      }
+    }
+  }
+
+  extract(objectTypeField) {
+    return this.dbinfo[objectTypeField].filter(x =>
+      this.objects.find(
+        y => x.pureName == y.pureName && x.schemaName == y.schemaName && y.objectTypeField == objectTypeField
+      )
+    );
+  }
+}