snippeteer/lib/snippets/database/patch_actions/RenameColumn.ts

/*
 * Copyright (C) SapphireCode - All Rights Reserved
 * This file is part of Snippeteer which is released under BSD-3-Clause.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, May 2020
 */

import { Persistent } from '@sapphirecode/modelling';
import { PatchAction } from '../classes/PatchAction';
import { Database } from '../classes/Database';

export class RenameColumn extends Persistent implements PatchAction {
  public get table (): string {
    return this.get ('table') as string;
  }

  public get column (): string {
    return this.get ('column') as string;
  }

  public get new_name (): string {
    return this.get ('new_name') as string;
  }

  public constructor (
    column: string,
    new_name: string,
    table: string
  ) {
    super ();
    this.properties.column = 'string';
    this.properties.table = 'string';
    this.properties.new_name = 'string';

    this.set ('column', column);
    this.set ('new_name', new_name);
    this.set ('table', table);
  }

  public apply (db: Database): void {
    const table = db.get_table (this.table);
    if (typeof table === 'undefined' || table === null) {
      throw new Error (
        `table ${this.table} not found`
      );
    }
    const column = table.get_column (this.column);
    if (typeof column === 'undefined' || column === null) {
      throw new Error (
        `column ${this.column} not found in table ${this.table}`
      );
    }

    column.name = this.new_name;
  }
}