blue-twilight/app/PhotoComment.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class PhotoComment extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name',
        'email',
        'comment'
    ];

    public function authorDisplayName()
    {
        return is_null($this->createdBy) ? $this->name : $this->createdBy->name;
    }

    public function authorEmail()
    {
        return is_null($this->createdBy) ? $this->email : $this->createdBy->email;
    }

    public function children()
    {
        return $this->hasMany(PhotoComment::class, 'parent_comment_id');
    }

    public function createdBy()
    {
        return $this->belongsTo(User::class, 'created_user_id');
    }

    public function depth()
    {
        $depth = 0;
        $current = $this;

        while (!is_null($current->parent))
        {
            $current = $current->parent;
            $depth++;
        }

        return $depth;
    }

    public function isApproved()
    {
        return (!is_null($this->approved_at) && is_null($this->rejected_at));
    }

    public function isModerated()
    {
        return (!is_null($this->approved_at) || !is_null($this->rejected_at));
    }

    public function isRejected()
    {
        return (!is_null($this->rejected_at) && is_null($this->approved_at));
    }

    public function parent()
    {
        return $this->belongsTo(PhotoComment::class, 'parent_comment_id');
    }

    public function photo()
    {
        return $this->belongsTo(Photo::class);
    }

    public function textAsHtml()
    {
        $start = '<p>';
        $end = '</p>';
        $isHtml = (
            strlen($this->comment) > (strlen($start) + strlen($end)) && // text contains both our start + end string
            strtolower(substr($this->comment, 0, strlen($start))) == strtolower($start) && // text starts with our start string
            strtolower(substr($this->comment, strlen($this->comment) - strlen($end))) == strtolower($end) // text ends with our end string
        );

        return $isHtml ? $this->comment : sprintf('<p>%s</p>', $this->comment);
    }
}