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<?php

namespace Illuminate\Database\Eloquent;

class SoftDeletingScope implements Scope
{
    /**
     * All of the extensions to be added to the builder.
     *
     * @var array
     */
    protected $extensions = ['ForceDelete', 'Restore', 'WithTrashed', 'WithoutTrashed', 'OnlyTrashed'];

/**
     * Apply the scope to a given Eloquent query builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @param  \Illuminate\Database\Eloquent\Model  $model
     * @return void
     */
    public function apply(Builder $builder, Model $model)
    {
        $builder->whereNull($model->getQualifiedDeletedAtColumn());
    }

/**
     * Extend the query builder with the needed functions.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    public function extend(Builder $builder)
    {
        foreach ($this->extensions as $extension) {
            $this->{"add{$extension}"}($builder);
        }

$builder->onDelete(function (Builder $builder) {
            $column = $this->getDeletedAtColumn($builder);

return $builder->update([
                $column => $builder->getModel()->freshTimestampString(),
            ]);
        });
    }

/**
     * Get the "deleted at" column for the builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return string
     */
    protected function getDeletedAtColumn(Builder $builder)
    {
        if (count($builder->getQuery()->joins) > 0) {
            return $builder->getModel()->getQualifiedDeletedAtColumn();
        } else {
            return $builder->getModel()->getDeletedAtColumn();
        }
    }

/**
     * Add the force delete extension to the builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    protected function addForceDelete(Builder $builder)
    {
        $builder->macro('forceDelete', function (Builder $builder) {
            return $builder->getQuery()->delete();
        });
    }

/**
     * Add the restore extension to the builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    protected function addRestore(Builder $builder)
    {
        $builder->macro('restore', function (Builder $builder) {
            $builder->withTrashed();

return $builder->update([$builder->getModel()->getDeletedAtColumn() => null]);
        });
    }

/**
     * Add the with-trashed extension to the builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    protected function addWithTrashed(Builder $builder)
    {
        $builder->macro('withTrashed', function (Builder $builder) {
            return $builder->withoutGlobalScope($this);
        });
    }

/**
     * Add the without-trashed extension to the builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    protected function addWithoutTrashed(Builder $builder)
    {
        $builder->macro('withoutTrashed', function (Builder $builder) {
            $model = $builder->getModel();

$builder->withoutGlobalScope($this)->whereNull(
                $model->getQualifiedDeletedAtColumn()
            );

return $builder;
        });
    }

/**
     * Add the only-trashed extension to the builder.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $builder
     * @return void
     */
    protected function addOnlyTrashed(Builder $builder)
    {
        $builder->macro('onlyTrashed', function (Builder $builder) {
            $model = $builder->getModel();

$builder->withoutGlobalScope($this)->whereNotNull(
                $model->getQualifiedDeletedAtColumn()
            );

return $builder;
        });
    }
}