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Use constants and language helper

Use config and language files, constants instead of text in the code

Bad:

php

public function isNormal(): bool
{
    return $article->type === 'normal';
}

return back()->with('message', 'Your article has been added!');

Good:

php

public function isNormal(): bool
{
    return $article->type === Article::TYPE_NORMAL;
}

return back()->with('message', __('app.article_added'));

Use constants and language helper ​