[5.5] Add View::either method

[sebastiandedeyne]

Adds a View::either method. either returns and instance of the first view if it exists, or the second if it doesn't.

return view()->either("categories.{$category->slug}", 'categories.default', compact('category'));

Wrote this, then realized it didn't solve my current use case, but thought I might as well PR anyway 😅

[lucasmichot]

@sebastiandedeyne, nice ! It makes me feel about template resolutions in Drupal.
Nevertheless, why do you limit to one view and one fallback? Why not providing an array of many views ?

/**
 * @param  array  $views
 * @param  array  $data
 * @param  array  $mergeData
 * @return \Illuminate\Contracts\View\View
 * @throws \InvalidArgumentException
 */
public function either($views, $data = [], $mergeData = [])
{
    foreach ($views as $view) {
        if ($this->exists($view)) {
            return $this->make($view, $data, $mergeData);
        }
    }

    throw new InvalidArgumentException('None of the views could be resolved.');
}

[taylorotwell]

No plans on adding this. I would just make a helper function in your app that does it.

[taylorotwell]

Refactored into View::first and it takes an array of views that can be any length now.