feat(persistance) : add DAO

src/app/dao/ComposedDAO.ts

@@ -0,0 +1,28 @@
+import { QueryResult } from '../types/sqlite.type';
+import { BaseDAO } from './BaseDAO';
+
+export abstract class ComposedDAO<T extends Object, K extends Object, U> extends BaseDAO<T, K, U> {
+  protected readonly JOIN_SQL: string;
+  protected readonly tableAlias: string;
+
+  constructor(tableName: string, joinSql: string, tableAlias: string) {
+    super(tableName);
+    this.JOIN_SQL = joinSql;
+    this.tableAlias = tableAlias;
+  }
+
+  override async findAll() {
+    const result: QueryResult<U> = await this.sqlite.executeQuery(this.JOIN_SQL);
+    return result.rows.map(this.fromDB);
+  }
+
+  override async findBy(values: Partial<K>): Promise<T[]> {
+    let sql = this.JOIN_SQL.slice(0, -1) + ' ';
+    const params: any[] = [];
+    const whereSql = this.whereClauseGenerator(values, params, this.tableAlias);
+    sql += whereSql + ';';
+    console.log(sql);
+    const result: QueryResult<U> = await this.sqlite.executeQuery(sql, params);
+    return result.rows.map(this.fromDB);
+  }
+}