64 lines
1.6 KiB
PHP
64 lines
1.6 KiB
PHP
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<?php namespace BookStack\Entities;
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class SlugGenerator
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{
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protected $entity;
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/**
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* SlugGenerator constructor.
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* @param $entity
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*/
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public function __construct(Entity $entity)
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{
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$this->entity = $entity;
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}
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/**
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* Generate a fresh slug for the given entity.
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* The slug will generated so it does not conflict within the same parent item.
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*/
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public function generate(): string
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{
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$slug = $this->formatNameAsSlug($this->entity->name);
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while ($this->slugInUse($slug)) {
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$slug .= '-' . substr(md5(rand(1, 500)), 0, 3);
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}
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return $slug;
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}
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/**
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* Format a name as a url slug.
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*/
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protected function formatNameAsSlug(string $name): string
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{
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$slug = preg_replace('/[\+\/\\\?\@\}\{\.\,\=\[\]\#\&\!\*\'\;\:\$\%]/', '', mb_strtolower($name));
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$slug = preg_replace('/\s{2,}/', ' ', $slug);
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$slug = str_replace(' ', '-', $slug);
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if ($slug === "") {
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$slug = substr(md5(rand(1, 500)), 0, 5);
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}
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return $slug;
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}
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/**
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* Check if a slug is already in-use for this
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* type of model within the same parent.
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*/
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protected function slugInUse(string $slug): bool
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{
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$query = $this->entity->newQuery()->where('slug', '=', $slug);
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if ($this->entity instanceof BookChild) {
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$query->where('book_id', '=', $this->entity->book_id);
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}
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if ($this->entity->id) {
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$query->where('id', '!=', $this->entity->id);
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}
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return $query->count() > 0;
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}
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}
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