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by Jan
03:55
created

Attachment::setURL()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 8
Code Lines 3

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 2
eloc 3
nc 2
nop 1
dl 0
loc 8
rs 10
c 0
b 0
f 0
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<?php
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declare(strict_types=1);
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/**
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 * Part-DB Version 0.4+ "nextgen"
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 * Copyright (C) 2016 - 2019 Jan Böhmer
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 * https://github.com/jbtronics.
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
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 */
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namespace App\Entity\Attachments;
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use App\Entity\Base\DBElement;
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use App\Entity\Base\NamedDBElement;
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use App\Validator\Constraints\Selectable;
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use Doctrine\ORM\Mapping as ORM;
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/**
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 * Class Attachment.
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 *
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 * @ORM\Entity
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 * @ORM\Table(name="`attachements`")
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 * @ORM\InheritanceType("SINGLE_TABLE")
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 * @ORM\DiscriminatorColumn(name="class_name", type="string")
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 * @ORM\DiscriminatorMap({"PartDB\Part" = "PartAttachment", "Part" = "PartAttachment"})
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 *
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 */
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abstract class Attachment extends NamedDBElement
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{
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    /**
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     * @var bool
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     * @ORM\Column(type="boolean")
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     */
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    protected $show_in_table = false;
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    /**
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     * @var string The filename using the %BASE% variable
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     * @ORM\Column(type="string", name="filename")
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     */
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    protected $path = "";
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    /**
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     * ORM mapping is done in sub classes (like PartAttachment)
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     */
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    protected $element;
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    /**
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     * @var AttachmentType
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     * @ORM\ManyToOne(targetEntity="AttachmentType", inversedBy="attachments")
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     * @ORM\JoinColumn(name="type_id", referencedColumnName="id")
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     * @Selectable()
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     */
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    protected $attachment_type;
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    /***********************************************************
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     * Various function
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     ***********************************************************/
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    /**
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     * Check if this attachement is a picture (analyse the file's extension).
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     *
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     * @return bool * true if the file extension is a picture extension
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     *              * otherwise false
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     */
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    public function isPicture(): bool
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    {
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        $extension = pathinfo($this->getPath(), PATHINFO_EXTENSION);
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        // list all file extensions which are supported to display them by HTML code
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        $picture_extensions = array('gif', 'png', 'jpg', 'jpeg', 'bmp', 'svg', 'tif');
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        return in_array(strtolower($extension), $picture_extensions, true);
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    }
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    /**
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     * Checks if the attachment file is externally saved (the database saves an URL)
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     * @return bool true, if the file is saved externally
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     */
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    public function isExternal() : bool
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    {
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        return static::isUrl($this->getPath());
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    }
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    /********************************************************************************
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     *
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     *   Getters
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     *
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     *********************************************************************************/
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    /**
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     * Returns the extension of the file referenced via the attachment.
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     * For a path like %BASE/path/foo.bar, bar will be returned.
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     * @return string
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     */
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    public function getExtension() : string
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    {
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        return pathinfo($this->getPath(), PATHINFO_EXTENSION);
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    }
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    /**
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     * Get the element, associated with this Attachement (for example a "Part" object).
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     *
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     * @return AttachmentContainingDBElement The associated Element.
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     */
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    public function getElement(): ?AttachmentContainingDBElement
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    {
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        return $this->element;
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    }
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    /**
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     * Checks if the file in this attachement is existing. This works for files on the HDD, and for URLs
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     * (it's not checked if the ressource behind the URL is really existing).
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     *
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     * @return bool True if the file is existing.
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     */
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    public function isFileExisting(): bool
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    {
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        return file_exists($this->getPath()) || static::isURL($this->getPath());
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    }
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    /**
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     * The URL to the external file.
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     * Returns null, if the file is not external.
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     * @return string|null
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     */
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    public function getURL(): ?string
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    {
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        if (!$this->isExternal()) {
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            return null;
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        }
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        return $this->path;
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    }
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    /**
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     * Returns the hostname where the external file is stored.
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     * Returns null, if the file is not external.
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     * @return string|null
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     */
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    public function getHost(): ?string
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    {
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        if (!$this->isExternal()) {
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            return null;
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        }
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        return parse_url($this->getURL(), PHP_URL_HOST);
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    }
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    /**
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     * Get the filepath, relative to %BASE%.
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     *
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     * @return string A string like %BASE/path/foo.bar
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     */
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    public function getPath(): string
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    {
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        return $this->path;
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    }
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    /**
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     * Returns the filename of the attachment.
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     * For a path like %BASE/path/foo.bar, foo.bar will be returned.
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     *
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     * If the path is a URL (can be checked via isExternal()), null will be returned.
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     *
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     * @return string|null
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     */
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    public function getFilename(): ?string
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    {
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        if ($this->isExternal()) {
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            return null;
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        }
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        return pathinfo($this->getPath(), PATHINFO_BASENAME);
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    }
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    /**
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     * Get the show_in_table attribute.
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     *
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     * @return bool true means, this attachement will be listed in the "Attachements" column of the HTML tables
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     *              false means, this attachement won't be listed in the "Attachements" column of the HTML tables
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     */
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    public function getShowInTable(): bool
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    {
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        return (bool) $this->show_in_table;
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    }
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    /**
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     *  Get the type of this attachement.
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     *
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     * @return AttachmentType the type of this attachement
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     *
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     */
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    public function getAttachmentType(): ?AttachmentType
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    {
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        return $this->attachment_type;
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    }
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    /**
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     * Returns the ID as an string, defined by the element class.
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     * This should have a form like P000014, for a part with ID 14.
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     *
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     * @return string The ID as a string;
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     */
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    public function getIDString(): string
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    {
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        return 'A'.sprintf('%09d', $this->getID());
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    }
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    /*****************************************************************************************************
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     * Setters
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     ****************************************************************************************************/
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    /**
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     * @param bool $show_in_table
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     *
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     * @return self
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     */
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    public function setShowInTable(bool $show_in_table): self
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    {
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        $this->show_in_table = $show_in_table;
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        return $this;
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    }
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    abstract public function setElement(AttachmentContainingDBElement $element) : Attachment;
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    /**
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     * @param string $path
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     * @return Attachment
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     */
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    public function setPath(string $path): Attachment
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    {
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        $this->path = $path;
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        return $this;
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    }
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    /**
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     * @param AttachmentType $attachement_type
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     * @return Attachment
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     */
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    public function setAttachmentType(AttachmentType $attachement_type): Attachment
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    {
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        $this->attachment_type = $attachement_type;
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        return $this;
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    }
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    public function setURL(?string $url) : Attachment
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    {
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        //Only set if the URL is not empty
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        if (!empty($url)) {
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            $this->path = $url;
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        }
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        return $this;
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    }
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    /*****************************************************************************************************
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     * Static functions
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     *****************************************************************************************************/
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    /**
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     * Check if a string is a URL and is valid.
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     * @param $string string The string which should be checked.
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     * @param bool $path_required If true, the string must contain a path to be valid. (e.g. foo.bar would be invalid, foo.bar/test.php would be valid).
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     * @param $only_http bool Set this to true, if only HTTPS or HTTP schemata should be allowed.
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     *  *Caution: When this is set to false, a attacker could use the file:// schema, to get internal server files, like /etc/passwd.*
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     * @return bool True if the string is a valid URL. False, if the string is not an URL or invalid.
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     */
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    public static function isURL(string $string, bool $path_required = true, bool $only_http = true) : bool
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    {
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        if ($only_http) {   //Check if scheme is HTTPS or HTTP
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            $scheme = parse_url($string, PHP_URL_SCHEME);
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            if ($scheme !== 'http' && $scheme !== 'https') {
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                return false;   //All other schemes are not valid.
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            }
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        }
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        if ($path_required) {
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            return (bool) filter_var($string, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED);
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        }
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        return (bool) filter_var($string, FILTER_VALIDATE_URL);
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    }
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}
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