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1<?php
2
3namespace Qmp\Laravel\FileGenerator\Services\FileGenerator\Generators;
4
5use Illuminate\Support\Str;
6use Qmp\Laravel\FileGenerator\Config;
7use Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileExtensionException;
8use Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileTypeException;
9
10class CompressedImageGenerator extends AbstractGenerator
11{
12    public const DEFAULT_JPG_QUALITY = 60;
13
14    public const DEFAULT_PNG_QUALITY = 0;
15
16    public const AUTHORIZED_OUTPUT_FILE_EXTENSION = ['jpg', 'jpeg', 'png'];
17
18    protected int $quality;
19
20    protected string $outputFileExtension;
21
22    /**
23     * @var array|string[]
24     */
25    protected array $rules = [
26        'type' => 'required|in:compressed image',
27        'content' => 'required|string',
28        'options' => 'present|array'
29    ];
30
31    /**
32     * @param \Qmp\Laravel\FileGenerator\Config $config
33     * @throws \Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\ConfigGeneratorException
34     * @throws \Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileExtensionException
35     */
36    public function __construct(Config $config)
37    {
38        parent::__construct($config);
39
40        $this->setOutputFileExtension();
41        $this->setQuality();
42    }
43
44    /**
45     * @return int
46     */
47    public function getQuality(): int
48    {
49        return $this->quality;
50    }
51
52    /**
53     * @return string
54     */
55    public function getOutputFileExtension(): string
56    {
57        return $this->outputFileExtension;
58    }
59
60    /**
61     *
62     */
63    protected function setQuality(): void
64    {
65        switch ($this->outputFileExtension) {
66            case 'jpg':
67            case 'jpeg':
68                $this->quality = $this->getJpgQuality();
69                break;
70            case 'png':
71                $this->quality = $this->getPngQuality();
72                break;
73        }
74    }
75
76    /**
77     * @throws \Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileExtensionException
78     */
79    protected function setOutputFileExtension(): void
80    {
81        $extension = str::lower(pathinfo($this->config->output_path, PATHINFO_EXTENSION));
82
83        if (!in_array($extension, self::AUTHORIZED_OUTPUT_FILE_EXTENSION)) {
84            throw new FileExtensionException($extension);
85        }
86
87        $this->outputFileExtension = $extension;
88    }
89
90    /**
91     * @return int
92     */
93    protected function getJpgQuality(): int
94    {
95        $quality = $this->getConfigQuality();
96
97        if (is_null($quality)) {
98            return self::DEFAULT_JPG_QUALITY;
99        }
100
101        return $quality;
102    }
103
104    /**
105     * @return int
106     */
107    protected function getPngQuality(): int
108    {
109        $quality = $this->getConfigQuality();
110
111        if (is_null($quality)) {
112            return self::DEFAULT_PNG_QUALITY;
113        }
114
115        return intval((100 - $quality) / 10);
116    }
117
118    /**
119     * @return int|null
120     */
121    protected function getConfigQuality(): ?int
122    {
123        $quality = $this->config->getOption('quality');
124
125        if ($quality && $quality >= 0 && $quality <= 100) {
126            return (int) $quality;
127        }
128
129        return null;
130    }
131
132    /**
133     * @throws \Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileNotExistException
134     * @throws \Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileTypeException
135     */
136    protected function createFile(): void
137    {
138        $filename = $this->checkFileExist($this->config->content);
139        $gdImage = $this->getGdImage($filename);
140        $this->generateCompressedImage($gdImage);
141    }
142
143    /**
144     * @param string $filename
145     * @return mixed
146     * @throws \Qmp\Laravel\FileGenerator\Services\FileGenerator\Exceptions\FileTypeException
147     */
148    protected function getGdImage(string $filename)
149    {
150        $explode = explode('/', image_type_to_mime_type(exif_imagetype($filename)));
151        $type = end($explode);
152
153        $method = "imagecreatefrom$type";
154        if (function_exists($method)) {
155            return $method($filename);
156        }
157
158        throw new FileTypeException($type);
159    }
160
161    /**
162     * @param $gdImage
163     * @return bool
164     */
165    protected function generateCompressedImage($gdImage): bool
166    {
167        $method = null;
168
169        switch ($this->outputFileExtension) {
170            case 'jpg':
171            case 'jpeg':
172                $method = 'imagejpeg';
173                break;
174            case 'png':
175                $method = 'imagepng';
176                break;
177        }
178
179        return function_exists($method) ? $method($gdImage, $this->config->output_path, $this->quality) : false;
180    }
181}