88 lines
1.8 KiB
PHP
88 lines
1.8 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Observers;
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use App\Models\Note;
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use App\Models\Tag;
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use Illuminate\Support\Arr;
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use Illuminate\Support\Collection;
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class NoteObserver
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{
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/**
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* Listen to the Note created event.
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*
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* @param Note $note
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*/
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public function created(Note $note)
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{
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$text = Arr::get($note->getAttributes(), 'note');
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if ($text === null) {
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return;
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}
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$tags = $this->getTagsFromNote($text);
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if (count($tags) === 0) {
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return;
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}
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$tags->transform(function ($tag) {
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return Tag::firstOrCreate(['tag' => $tag])->id;
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})->toArray();
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$note->tags()->attach($tags);
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}
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/**
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* Listen to the Note updated event.
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*
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* @param Note $note
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*/
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public function updated(Note $note)
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{
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$text = Arr::get($note->getAttributes(), 'note');
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if ($text === null) {
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return;
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}
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$tags = $this->getTagsFromNote($text);
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if (count($tags) === 0) {
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return;
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}
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$tags->transform(function ($tag) {
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return Tag::firstOrCreate(['tag' => $tag]);
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});
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$note->tags()->sync($tags->map(function ($tag) {
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return $tag->id;
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}));
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}
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/**
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* Listen to the Note deleting event.
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*
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* @param Note $note
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*/
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public function deleting(Note $note)
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{
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$note->tags()->detach();
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}
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/**
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* Retrieve the tags from a note’s text, tag for form #tag.
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*
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* @param string $note
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* @return Collection
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*/
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private function getTagsFromNote(string $note): Collection
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{
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preg_match_all('/#([^\s<>]+)\b/', $note, $tags);
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return collect($tags[1])->map(function ($tag) {
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return Tag::normalize($tag);
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})->unique();
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}
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}
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