feat(persistance): add additional ops for sqlite

src/app/services/sqlite.ts

@@ -1,14 +1,34 @@
 import { inject, Injectable } from '@angular/core';
 import { WebSqlite } from 'angular-web-sqlite';
+import { BatchOp } from '../types/sqlite.type';
 
 @Injectable({
   providedIn: 'root',
 })
 export class Sqlite {
-  private readonly webSqlite = inject(WebSqlite)
+  private readonly webSqlite = inject(WebSqlite);
 
   initializeDatabase(dbName: string) {
     return this.webSqlite.init(dbName);
   }
 
+  async executeQuery(sql: string, params: any[] = []) {
+    const result = await this.webSqlite.executeSql(sql, params);
+    return result;
+  }
+
+  async batchSqlOperations(ops: BatchOp[]) {
+    const result = await this.webSqlite.batchSql(ops);
+    return result;
+  }
+
+  async dropAllTables() {
+    const tables: { rows: { name: string }[] } = await this.executeQuery(
+      "SELECT * FROM sqlite_master WHERE type='table';"
+    );
+    const dropQueries: BatchOp[] = tables.rows
+      .filter((r) => !r.name.startsWith('sqlite_'))
+      .map((table) => [`DROP TABLE ${table.name};`, []]);
+    return this.batchSqlOperations(dropQueries);
+  }
 }

src/app/types/sqlite.type.ts

@@ -0,0 +1,2 @@
+export type QueryResult<T> = { rows: T[]};
+export type BatchOp = [string, any[]];