<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class LaravelConditionalIndexMigration extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {

        Schema::table('tablename', function (Blueprint $table) {
            $sm = Schema::getConnection()->getDoctrineSchemaManager();
            $doctrineTable = $sm->listTableDetails('tablename');

            if (! $doctrineTable->hasIndex('singlecolumnindexname')) {
                $table->index('column1', 'singlecolumnindexname');
            }
                      
            if (! $doctrineTable->hasIndex('multicolumnindexname')) {
                $table->index(['column2', 'column3'], 'multicolumnindexname');
            }
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {

        Schema::table('tablename', function (Blueprint $table) {
            $sm = Schema::getConnection()->getDoctrineSchemaManager();
            $doctrineTable = $sm->listTableDetails('tablename');

            if ($doctrineTable->hasIndex('singlecolumnindexname')) {
                $table->dropIndex('singlecolumnindexname');
            }
            if ($doctrineTable->hasIndex('multicolumnindexname')) {
                $table->dropIndex('multicolumnindexname');
            }
        });

    }
}