overtrue / laravel-follow

src/Followable.php

<?php

namespace Overtrue\LaravelFollow;

use Illuminate\Contracts\Pagination\Paginator;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Collection;
use Overtrue\LaravelFavorite\Traits\Favoriteable;

The type Overtrue\LaravelFavorite\Traits\Favoriteable was not found. Maybe you did not declare it correctly or list all dependencies?

/**
 * @property \Illuminate\Database\Eloquent\Collection $followings
 * @property \Illuminate\Database\Eloquent\Collection $followers
 */
trait Followable
{
    /**
     * @return bool
     */
    public function needsToApproveFollowRequests(): bool
    {
        return false;
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     *
     * @return array
     */
    public function follow($user): array
    {
        $isPending = $user->needsToApproveFollowRequests() ?: false;

        $this->followings()->attach($user, [
            'accepted_at' => $isPending ? null : now()
        ]);

        return ['pending' => $isPending];
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function unfollow($user)
    {
        $this->followings()->detach($user);
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     *
     */
    public function toggleFollow($user)
    {
        $this->isFollowing($user) ? $this->unfollow($user) : $this->follow($user);
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function rejectFollowRequestFrom($user)
    {
        $this->followers()->detach($user);
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function acceptFollowRequestFrom($user)
    {
        $this->followers()->updateExistingPivot($user, ['accepted_at' => now()]);
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function hasRequestedToFollow($user): bool
    {
        if ($user instanceof Model) {
            $user = $user->getKey();
        }

        /* @var \Illuminate\Database\Eloquent\Model $this */
        if ($this->relationLoaded('followings')) {
            return $this->followings
                ->where('pivot.accepted_at', '===', null)

The method where() does not exist on null.

                ->contains($user);
        }

        return $this->followings()
            ->wherePivot('accepted_at', null)
            ->where($this->getQualifiedKeyName(), $user)
            ->exists();
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function isFollowing($user): bool
    {
        if ($user instanceof Model) {
            $user = $user->getKey();
        }

        /* @var \Illuminate\Database\Eloquent\Model $this */
        if ($this->relationLoaded('followings')) {
            return $this->followings
                ->where('pivot.accepted_at', '!==', null)
                ->contains($user);
        }

        return $this->followings()
            ->wherePivot('accepted_at', '!=', null)
            ->where($this->getQualifiedKeyName(), $user)
            ->exists();
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function isFollowedBy($user): bool
    {
        if ($user instanceof Model) {
            $user = $user->getKey();
        }

        /* @var \Illuminate\Database\Eloquent\Model $this */
        if ($this->relationLoaded('followers')) {
            return $this->followers
                ->where('pivot.accepted_at', '!==', null)

The method where() does not exist on null.

                ->contains($user);
        }

        return $this->followers()
            ->wherePivot('accepted_at', '!=', null)
            ->where($this->getQualifiedKeyName(), $user)
            ->exists();
    }

    /**
     * @param \Illuminate\Database\Eloquent\Model|int $user
     */
    public function areFollowingEachOther($user): bool
    {
        /* @var \Illuminate\Database\Eloquent\Model $user*/
        return $this->isFollowing($user) && $this->isFollowedBy($user);
    }

    public function scopeOrderByFollowersCount($query, string $direction = 'desc')
    {
        return $query->withCount('followers')->orderBy('followers_count', $direction);
    }

    public function scopeOrderByFollowersCountDesc($query)
    {
        return $this->scopeOrderByFollowersCount($query, 'desc');
    }

    public function scopeOrderByFollowersCountAsc($query)
    {
        return $this->scopeOrderByFollowersCount($query, 'asc');
    }

    public function followers(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
    {
        /* @var \Illuminate\Database\Eloquent\Model $this */
        return $this->belongsToMany(
            __CLASS__,
            \config('follow.relation_table', 'user_follower'),
            'following_id',
            'follower_id'
        )->withPivot('accepted_at')->withTimestamps()->using(UserFollower::class);
    }

    public function followings(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
    {
        /* @var \Illuminate\Database\Eloquent\Model $this */
        return $this->belongsToMany(
            __CLASS__,
            \config('follow.relation_table', 'user_follower'),
            'follower_id',
            'following_id'
        )->withPivot('accepted_at')->withTimestamps()->using(UserFollower::class);
    }

    public function attachFollowStatus($followables, callable $resolver = null)
    {
        $returnFirst = false;

        switch (true) {
            case $followables instanceof Model:
                $returnFirst = true;
                $followables = \collect([$followables]);
                break;
            case $followables instanceof LengthAwarePaginator:
                $followables = $followables->getCollection();
                break;
            case $followables instanceof Paginator:
                $followables = \collect($followables->items());
                break;
            case \is_array($followables):
                $followables = \collect($followables);
                break;
        }

        \abort_if(!($followables instanceof Collection), 422, 'Invalid $followables type.');

        $followed = UserFollower::where('follower_id', $this->getKey())->get();

It seems like getKey() must be provided by classes using this trait. How about adding it as abstract method to this trait?

        $followables->map(function ($followable) use ($followed, $resolver) {
            $resolver = $resolver ?? fn ($m) => $m;
            $followable = $resolver($followable);

            if ($followable && \in_array(Followable::class, \class_uses($followable))) {
                $item = $followed->where('following_id', $followable->getKey())->first();
                $followable->setAttribute('has_followed', !!$item);
                $followable->setAttribute('followed_at', $item ? $item->created_at : null);
                $followable->setAttribute('follow_accepted_at', $item ? $item->accepted_at : null);

The property accepted_at does not seem to exist on Overtrue\LaravelFollow\UserFollower. Are you sure there is no database migration missing?

            }
        });

        return $returnFirst ? $followables->first() : $followables;
    }
}