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<?php

namespace Silber\Bouncer;

use Illuminate\Database\Eloquent\Model;
use Silber\Bouncer\Database\Queries\Abilities;

class Clipboard extends BaseClipboard
{
    /**
     * Determine if the given authority has the given ability, and return the ability ID.
     *
     * @param  string  $ability
     * @param  \Illuminate\Database\Eloquent\Model|string|null  $model
     * @return int|bool|null
     */
    public function checkGetId(Model $authority, $ability, $model = null)
    {
        if ($this->isForbidden($authority, $ability, $model)) {
            return false;
        }

$ability = $this->getAllowingAbility($authority, $ability, $model);

return $ability ? $ability->getKey() : null;
    }

/**
     * Determine whether the given ability request is explicitely forbidden.
     *
     * @param  string  $ability
     * @param  \Illuminate\Database\Eloquent\Model|string|null  $model
     * @return bool
     */
    protected function isForbidden(Model $authority, $ability, $model = null)
    {
        return $this->getHasAbilityQuery(
            $authority, $ability, $model, $allowed = false
        )->exists();
    }

/**
     * Get the ability model that allows the given ability request.
     *
     * Returns null if the ability is not allowed.
     *
     * @param  string  $ability
     * @param  \Illuminate\Database\Eloquent\Model|string|null  $model
     * @return \Illuminate\Database\Eloquent\Model|null
     */
    protected function getAllowingAbility(Model $authority, $ability, $model = null)
    {
        return $this->getHasAbilityQuery(
            $authority, $ability, $model, $allowed = true
        )->first();
    }

/**
     * Get the query for where the given authority has the given ability.
     *
     * @param  \Illuminate\Database\Eloquent\Model  $authority
     * @param  string  $ability
     * @param  \Illuminate\Database\Eloquent\Model|string|null  $model
     * @param  bool  $allowed
     * @return \Illuminate\Database\Eloquent\Builder
     */
    protected function getHasAbilityQuery($authority, $ability, $model, $allowed)
    {
        $query = Abilities::forAuthority($authority, $allowed);

if (! $this->isOwnedBy($authority, $model)) {
            $query->where('only_owned', false);
        }

if (is_null($model)) {
            return $this->constrainToSimpleAbility($query, $ability);
        }

return $query->byName($ability)->forModel($model);
    }

/**
     * Constrain the query to the given non-model ability.
     *
     * @param  \Illuminate\Database\Eloquent\Builder  $query
     * @param  string  $ability
     * @return \Illuminate\Database\Eloquent\Builder
     */
    protected function constrainToSimpleAbility($query, $ability)
    {
        return $query->where(function ($query) use ($ability) {
            $query->where('name', $ability)->whereNull('entity_type');

$query->orWhere(function ($query) {
                $query->where('name', '*')->where(function ($query) {
                    $query->whereNull('entity_type')->orWhere('entity_type', '*');
                });
            });
        });
    }
}