pixelfed/app/Services/HashtagRelatedService.php

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<?php
namespace App\Services;
use DB;
use App\StatusHashtag;
use App\Models\HashtagRelated;
class HashtagRelatedService
{
public static function get($id)
{
$tag = HashtagRelated::whereHashtagId($id)->first();
if(!$tag) {
return [];
}
return $tag->related_tags;
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}
public static function fetchRelatedTags($tag)
{
$res = StatusHashtag::query()
->select('h2.name', DB::raw('COUNT(*) as related_count'))
->join('status_hashtags as hs2', function ($join) {
$join->on('status_hashtags.status_id', '=', 'hs2.status_id')
->whereRaw('status_hashtags.hashtag_id != hs2.hashtag_id');
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})
->join('hashtags as h1', 'status_hashtags.hashtag_id', '=', 'h1.id')
->join('hashtags as h2', 'hs2.hashtag_id', '=', 'h2.id')
->where('h1.name', '=', $tag)
->groupBy('h2.name')
->orderBy('related_count', 'desc')
->limit(30)
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->get();
return $res;
}
}