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Editing: Notice.php

<?php

namespace WPDesk\Notice;

/**
 * Class Notice
 *
 * WordPress admin notice.
 * @package WPDesk\Notice
 */
class Notice
{

const NOTICE_TYPE_ERROR = 'error';
    const NOTICE_TYPE_WARNING = 'warning';
    const NOTICE_TYPE_SUCCESS = 'success';
    const NOTICE_TYPE_INFO = 'info';

const ADMIN_FOOTER_BASE_PRIORITY = 9999999;

/**
     * Notice type.
     *
     * @var string
     */
    protected $noticeType;

/**
     * Notice content.
     *
     * @var string
     */
    protected $noticeContent;

/**
     * Is dismissible.
     *
     * @var bool
     */
    protected $dismissible;

/**
     * Notice hook priority.
     * @var int;
     */
    protected $priority;

/**
     * Is action added?
     * @var bool
     */
    private $actionAdded = false;

/**
     * Attributes.
     *
     * @var string[]
     */
    protected $attributes = array();

/**
     * WPDesk_Flexible_Shipping_Notice constructor.
     *
     * @param string $noticeContent Notice content.
     * @param string $noticeType Notice type.
     * @param bool $dismissible Is dismissible.
     * @param int $priority Notice priority.
     * @param array $attributes Attributes.
     */
    public function __construct(
        $noticeContent,
        $noticeType = 'info',
        $dismissible = false,
        $priority = 10,
        $attributes = array()
    ) {
        $this->noticeContent = $noticeContent;
        $this->noticeType    = $noticeType;
        $this->dismissible   = $dismissible;
        $this->priority      = $priority;
        $this->attributes    = $attributes;
        $this->addAction();
    }

/**
     * @return string
     */
    public function getNoticeContent()
    {
        return $this->noticeContent;
    }

/**
     * @param string $noticeContent
     */
    public function setNoticeContent($noticeContent)
    {
        $this->noticeContent = $noticeContent;
    }

/**
     * @return string
     */
    public function getNoticeType()
    {
        return $this->noticeType;
    }

/**
     * @param string $noticeType
     */
    public function setNoticeType($noticeType)
    {
        $this->noticeType = $noticeType;
    }

/**
     * @return bool
     */
    public function isDismissible()
    {
        return $this->dismissible;
    }

/**
     * @param bool $dismissible
     */
    public function setDismissible($dismissible)
    {
        $this->dismissible = $dismissible;
    }

/**
     * @return int
     */
    public function getPriority()
    {
        return $this->priority;
    }

/**
     * @param int $priority
     */
    public function setPriority($priority)
    {
        $this->priority = $priority;
        if ($this->actionAdded) {
            $this->removeAction();
            $this->addAction();
        }
    }

/**
     * Add notice action.
     */
    protected function addAction()
    {
        if (!$this->actionAdded) {
            add_action('admin_notices', [$this, 'showNotice'], $this->priority);
            add_action(
                'admin_footer',
                [$this, 'showNotice'],
                self::ADMIN_FOOTER_BASE_PRIORITY + intval($this->priority)
            );
            $this->actionAdded = true;
        }
    }

/**
     * Remove action.
     */
    protected function removeAction()
    {
        if ($this->actionAdded) {
            remove_action('admin_notices', [$this, 'showNotice'], $this->priority);
            remove_action(
                'admin_footer',
                [$this, 'showNotice'],
                self::ADMIN_FOOTER_BASE_PRIORITY + intval($this->priority)
            );
            $this->actionAdded = false;
        }
    }

/**
     * Add attribute.
     *
     * @param string $name Name
     * @param string $value Value.
     */
    public function addAttribute($name, $value)
    {
        $this->attributes[ $name ] = $value;
    }

/**
     * Get notice class.
     *
     * @return string
     */
    protected function getNoticeClass()
    {
        if ('updated' === $this->noticeType) {
            $notice_class = 'notice ' . $this->noticeType;
        } else {
            $notice_class = 'notice notice-' . $this->noticeType;
        }
        if ($this->dismissible) {
            $notice_class .= ' is-dismissible';
        }
        if (isset($this->attributes['class'])) {
            $notice_class .= ' ' . $this->attributes['class'];
        }
        return $notice_class;
    }

/**
     * Get attributes as string.
     *
     * @return string
     */
    protected function getAttributesAsString()
    {
        $attribute_string = sprintf('class="%1$s"', esc_attr($this->getNoticeClass()));
        foreach ($this->attributes as $attribute_name => $attribute_value) {
            if ('class' !== $attribute_name) {
                $attribute_string .= sprintf(' %1$s="%2$s"', esc_html($attribute_name), esc_attr($attribute_value));
            }
        }
        return $attribute_string;
    }

private function addParagraphToContent()
    {
        if (0 === strpos($this->noticeContent, '<p>')) {
            return false;
        }
        if (0 === strpos($this->noticeContent, '<div>') || 0 === strpos($this->noticeContent, '<div ')) {
            return false;
        }
        return true;
    }

/**
     * Show notice;
     */
    public function showNotice()
    {
        $this->removeAction();
        $noticeFormat = '<div %1$s>%2$s</div>';
        if ($this->addParagraphToContent()) {
            $noticeFormat = '<div %1$s><p>%2$s</p></div>';
        }
        echo sprintf($noticeFormat, $this->getAttributesAsString(), $this->noticeContent);
    }

}

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📄 AjaxHandler.php	FILE	[EDIT]
📄 Factory.php	FILE	[EDIT]
📄 Notice.php	FILE	[EDIT]
📄 PermanentDismissibleNotice.php	FILE	[EDIT]
📁 views/	DIR

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Editing: Notice.php