From ba6f67798d97d4d5db52743815d128c31060c4cd Mon Sep 17 00:00:00 2001
From: James Collins <james.collins@outlook.com.au>
Date: Fri, 20 Oct 2023 09:47:29 +1000
Subject: [PATCH] obsolete

---
 app/Services/AnimatedGifService.php | 630 ----------------------------
 1 file changed, 630 deletions(-)
 delete mode 100644 app/Services/AnimatedGifService.php

diff --git a/app/Services/AnimatedGifService.php b/app/Services/AnimatedGifService.php
deleted file mode 100644
index cab5501..0000000
--- a/app/Services/AnimatedGifService.php
+++ /dev/null
@@ -1,630 +0,0 @@
-<?php
-
-namespace App\Services;
-
-class AnimatedGifService
-{
-    /**
-     * Check if a GIF file at a path is animated or not
-     *
-     * @param string  $filenameOrBlob GIF file path or data blob if dataSize > 0.
-     * @param integer $dataSize       GIF blob size.
-     * @return boolean GIF file/blob is animated.
-     */
-    public static function isAnimatedGif(string $filenameOrBlob, int $dataSize = 0): bool
-    {
-        $regex = '#\x00\x21\xF9\x04.{4}\x00(\x2C|\x21)#s';
-        $count = 0;
-
-        if ($dataSize > 0) {
-            if (($fh = @fopen($filenameOrBlob, 'rb')) === false) {
-                return false;
-            }
-
-            $chunk = false;
-            while (feof($fh) === false && $count < 2) {
-                $chunk = ($chunk !== '' ? substr($chunk, -20) : "") . fread($fh, (1024 * 100)); //read 100kb at a time
-                $count += preg_match_all($regex, $chunk, $matches);
-            }
-
-            fclose($fh);
-        } else {
-            $count = preg_match_all($regex, $filenameOrBlob, $matches);
-        }
-
-        return $count > 1;
-    }
-
-    /**
-     * Extract frames of a GIF
-     *
-     * @param string  $filenameOrBlob GIF filename path
-     * @param integer $dataSize       GIF blob size.
-     * @param boolean $originalFrames Get original frames (with transparent background)
-     */
-    public function extract(string $filenameOrBlob, int $dataSize = 0, bool $originalFrames = false): array
-    {
-        if (self::isAnimatedGif($filenameOrBlob) === false) {
-            return [];
-        }
-
-        $this->reset();
-        $this->parseFramesInfo($filename);
-        $prevImg = null;
-
-        for ($i = 0; $i < count($this->frameSources); $i++) {
-            $this->frames[$i] = [];
-            $this->frameDurations[$i] = $this->frames[$i]['duration'] = $this->frameSources[$i]['delay_time'];
-
-            $img = imagecreatefromstring($this->fileHeader["gifheader"] . $this->frameSources[$i]["graphicsextension"] . $this->frameSources[$i]["imagedata"] . chr(0x3b));
-
-            if (!$originalFrames) {
-                if ($i > 0) {
-                    $prevImg = $this->frames[($i - 1)]['image'];
-                } else {
-                    $prevImg = $img;
-                }
-
-                $sprite = imagecreate($this->gifMaxWidth, $this->gifMaxHeight);
-                imagesavealpha($sprite, true);
-
-                $transparent = imagecolortransparent($prevImg);
-
-                if ($transparent > -1 && imagecolorstotal($prevImg) > $transparent) {
-                    $actualTrans = imagecolorsforindex($prevImg, $transparent);
-                    imagecolortransparent($sprite, imagecolorallocate($sprite, $actualTrans['red'], $actualTrans['green'], $actualTrans['blue']));
-                }
-
-                if ((int) $this->frameSources[$i]['disposal_method'] == 1 && $i > 0) {
-                    imagecopy($sprite, $prevImg, 0, 0, 0, 0, $this->gifMaxWidth, $this->gifMaxHeight);
-                }
-
-                imagecopyresampled($sprite, $img, $this->frameSources[$i]["offset_left"], $this->frameSources[$i]["offset_top"], 0, 0, $this->gifMaxWidth, $this->gifMaxHeight, $this->gifMaxWidth, $this->gifMaxHeight);
-                $img = $sprite;
-            }//end if
-
-            $this->frameImages[$i] = $this->frames[$i]['image'] = $img;
-        }//end for
-
-        return $this->frames;
-    }
-}
-
-class GifFrameExtractor
-{
-    // Properties
-    // ===================================================================================
-
-    /**
-     * @var resource
-     */
-    private $gif;
-
-    /**
-     * @var array
-     */
-    private $frames;
-
-    /**
-     * @var array
-     */
-    private $frameDurations;
-
-    /**
-     * @var array
-     */
-    private $frameImages;
-
-    /**
-     * @var array
-     */
-    private $framePositions;
-
-    /**
-     * @var array
-     */
-    private $frameDimensions;
-
-    /**
-     * @var integer
-     *
-     * (old: $this->index)
-     */
-    private $frameNumber;
-
-    /**
-     * @var array
-     *
-     * (old: $this->imagedata)
-     */
-    private $frameSources;
-
-    /**
-     * @var array
-     *
-     * (old: $this->fileHeader)
-     */
-    private $fileHeader;
-
-    /**
-     * @var integer The reader pointer in the file source
-     *
-     * (old: $this->pointer)
-     */
-    private $pointer;
-
-    /**
-     * @var integer
-     */
-    private $gifMaxWidth;
-
-    /**
-     * @var integer
-     */
-    private $gifMaxHeight;
-
-    /**
-     * @var integer
-     */
-    private $totalDuration;
-
-    /**
-     * @var integer
-     */
-    private $handle;
-
-    /**
-     * @var array
-     *
-     * (old: globaldata)
-     */
-    private $globaldata;
-
-    /**
-     * @var array
-     *
-     * (old: orgvars)
-     */
-    private $orgvars;
-
-    // Methods
-    // ===================================================================================
-
-
-    /**
-     * Parse the frame informations contained in the GIF file
-     *
-     * @param string $filename GIF filename path
-     */
-    private function parseFramesInfo(string $filename)
-    {
-        $this->openFile($filename);
-        $this->parseGifHeader();
-        $this->parseGraphicsExtension(0);
-        $this->getApplicationData();
-        $this->getApplicationData();
-        $this->getFrameString(0);
-        $this->parseGraphicsExtension(1);
-        $this->getCommentData();
-        $this->getApplicationData();
-        $this->getFrameString(1);
-
-        while (!$this->checkByte(0x3b) && !$this->checkEOF()) {
-            $this->getCommentData(1);
-            $this->parseGraphicsExtension(2);
-            $this->getFrameString(2);
-            $this->getApplicationData();
-        }
-    }
-
-    /**
-     * Parse the gif header (old: get_gif_header)
-     */
-    private function parseGifHeader()
-    {
-        $this->pointerForward(10);
-
-        if ($this->readBits(($mybyte = $this->readByteInt()), 0, 1) == 1) {
-            $this->pointerForward(2);
-            $this->pointerForward(pow(2, ($this->readBits($mybyte, 5, 3) + 1)) * 3);
-        } else {
-            $this->pointerForward(2);
-        }
-
-        $this->fileHeader["gifheader"] = $this->dataPart(0, $this->pointer);
-
-        // Decoding
-        $this->orgvars["gifheader"] = $this->fileHeader["gifheader"];
-        $this->orgvars["background_color"] = $this->orgvars["gifheader"][11];
-    }
-
-    /**
-     * Parse the application data of the frames (old: get_application_data)
-     */
-    private function getApplicationData()
-    {
-        $startdata = $this->readByte(2);
-
-        if ($startdata == chr(0x21) . chr(0xff)) {
-            $start = ($this->pointer - 2);
-            $this->pointerForward($this->readByteInt());
-            $this->readDataStream($this->readByteInt());
-            $this->fileHeader["applicationdata"] = $this->dataPart($start, ($this->pointer - $start));
-        } else {
-            $this->pointerRewind(2);
-        }
-    }
-
-    /**
-     * Parse the comment data of the frames (old: get_comment_data)
-     */
-    private function getCommentData()
-    {
-        $startdata = $this->readByte(2);
-
-        if ($startdata == chr(0x21) . chr(0xfe)) {
-            $start = ($this->pointer - 2);
-            $this->readDataStream($this->readByteInt());
-            $this->fileHeader["commentdata"] = $this->dataPart($start, ($this->pointer - $start));
-        } else {
-            $this->pointerRewind(2);
-        }
-    }
-
-    /**
-     * Parse the graphic extension of the frames (old: get_graphics_extension)
-     */
-    private function parseGraphicsExtension(int $type)
-    {
-        $startdata = $this->readByte(2);
-
-        if ($startdata == chr(0x21) . chr(0xf9)) {
-            $start = ($this->pointer - 2);
-            $this->pointerForward($this->readByteInt());
-            $this->pointerForward(1);
-
-            if ($type == 2) {
-                $this->frameSources[$this->frameNumber]["graphicsextension"] = $this->dataPart($start, ($this->pointer - $start));
-            } elseif ($type == 1) {
-                $this->orgvars["hasgx_type_1"] = 1;
-                $this->globaldata["graphicsextension"] = $this->dataPart($start, ($this->pointer - $start));
-            } elseif ($type == 0) {
-                $this->orgvars["hasgx_type_0"] = 1;
-                $this->globaldata["graphicsextension_0"] = $this->dataPart($start, ($this->pointer - $start));
-            }
-        } else {
-            $this->pointerRewind(2);
-        }//end if
-    }
-
-    /**
-     * Get the full frame string block (old: get_image_block)
-     */
-    private function getFrameString(int $type)
-    {
-        if ($this->checkByte(0x2c)) {
-            $start = $this->pointer;
-            $this->pointerForward(9);
-
-            if ($this->readBits(($mybyte = $this->readByteInt()), 0, 1) == 1) {
-                $this->pointerForward(pow(2, ($this->readBits($mybyte, 5, 3) + 1)) * 3);
-            }
-
-            $this->pointerForward(1);
-            $this->readDataStream($this->readByteInt());
-            $this->frameSources[$this->frameNumber]["imagedata"] = $this->dataPart($start, ($this->pointer - $start));
-
-            if ($type == 0) {
-                $this->orgvars["hasgx_type_0"] = 0;
-
-                if (isset($this->globaldata["graphicsextension_0"])) {
-                    $this->frameSources[$this->frameNumber]["graphicsextension"] = $this->globaldata["graphicsextension_0"];
-                } else {
-                    $this->frameSources[$this->frameNumber]["graphicsextension"] = null;
-                }
-
-                unset($this->globaldata["graphicsextension_0"]);
-            } elseif ($type == 1) {
-                if (isset($this->orgvars["hasgx_type_1"]) && $this->orgvars["hasgx_type_1"] == 1) {
-                    $this->orgvars["hasgx_type_1"] = 0;
-                    $this->frameSources[$this->frameNumber]["graphicsextension"] = $this->globaldata["graphicsextension"];
-                    unset($this->globaldata["graphicsextension"]);
-                } else {
-                    $this->orgvars["hasgx_type_0"] = 0;
-                    $this->frameSources[$this->frameNumber]["graphicsextension"] = $this->globaldata["graphicsextension_0"];
-                    unset($this->globaldata["graphicsextension_0"]);
-                }
-            }//end if
-
-            $this->parseFrameData();
-            $this->frameNumber++;
-        }//end if
-    }
-
-    /**
-     * Parse frame data string into an array (old: parse_image_data)
-     */
-    private function parseFrameData()
-    {
-        $this->frameSources[$this->frameNumber]["disposal_method"] = $this->getImageDataBit("ext", 3, 3, 3);
-        $this->frameSources[$this->frameNumber]["user_input_flag"] = $this->getImageDataBit("ext", 3, 6, 1);
-        $this->frameSources[$this->frameNumber]["transparent_color_flag"] = $this->getImageDataBit("ext", 3, 7, 1);
-        $this->frameSources[$this->frameNumber]["delay_time"] = $this->dualByteVal($this->getImageDataByte("ext", 4, 2));
-        $this->totalDuration += (int) $this->frameSources[$this->frameNumber]["delay_time"];
-        $this->frameSources[$this->frameNumber]["transparent_color_index"] = ord($this->getImageDataByte("ext", 6, 1));
-        $this->frameSources[$this->frameNumber]["offset_left"] = $this->dualByteVal($this->getImageDataByte("dat", 1, 2));
-        $this->frameSources[$this->frameNumber]["offset_top"] = $this->dualByteVal($this->getImageDataByte("dat", 3, 2));
-        $this->frameSources[$this->frameNumber]["width"] = $this->dualByteVal($this->getImageDataByte("dat", 5, 2));
-        $this->frameSources[$this->frameNumber]["height"] = $this->dualByteVal($this->getImageDataByte("dat", 7, 2));
-        $this->frameSources[$this->frameNumber]["local_color_table_flag"] = $this->getImageDataBit("dat", 9, 0, 1);
-        $this->frameSources[$this->frameNumber]["interlace_flag"] = $this->getImageDataBit("dat", 9, 1, 1);
-        $this->frameSources[$this->frameNumber]["sort_flag"] = $this->getImageDataBit("dat", 9, 2, 1);
-        $this->frameSources[$this->frameNumber]["color_table_size"] = (pow(2, ($this->getImageDataBit("dat", 9, 5, 3) + 1)) * 3);
-        $this->frameSources[$this->frameNumber]["color_table"] = substr($this->frameSources[$this->frameNumber]["imagedata"], 10, $this->frameSources[$this->frameNumber]["color_table_size"]);
-        $this->frameSources[$this->frameNumber]["lzw_code_size"] = ord($this->getImageDataByte("dat", 10, 1));
-
-        $this->framePositions[$this->frameNumber] = [
-            'x' => $this->frameSources[$this->frameNumber]["offset_left"],
-            'y' => $this->frameSources[$this->frameNumber]["offset_top"],
-        ];
-
-        $this->frameDimensions[$this->frameNumber] = [
-            'width' => $this->frameSources[$this->frameNumber]["width"],
-            'height' => $this->frameSources[$this->frameNumber]["height"],
-        ];
-
-        // Decoding
-        $this->orgvars[$this->frameNumber]["transparent_color_flag"] = $this->frameSources[$this->frameNumber]["transparent_color_flag"];
-        $this->orgvars[$this->frameNumber]["transparent_color_index"] = $this->frameSources[$this->frameNumber]["transparent_color_index"];
-        $this->orgvars[$this->frameNumber]["delay_time"] = $this->frameSources[$this->frameNumber]["delay_time"];
-        $this->orgvars[$this->frameNumber]["disposal_method"] = $this->frameSources[$this->frameNumber]["disposal_method"];
-        $this->orgvars[$this->frameNumber]["offset_left"] = $this->frameSources[$this->frameNumber]["offset_left"];
-        $this->orgvars[$this->frameNumber]["offset_top"] = $this->frameSources[$this->frameNumber]["offset_top"];
-
-        // Updating the max width
-        if ($this->gifMaxWidth < $this->frameSources[$this->frameNumber]["width"]) {
-            $this->gifMaxWidth = $this->frameSources[$this->frameNumber]["width"];
-        }
-
-        // Updating the max height
-        if ($this->gifMaxHeight < $this->frameSources[$this->frameNumber]["height"]) {
-            $this->gifMaxHeight = $this->frameSources[$this->frameNumber]["height"];
-        }
-    }
-
-    /**
-     * Get the image data byte (old: get_imagedata_byte)
-     */
-    private function getImageDataByte(string $type, int $start, int $length): string
-    {
-        if ($type == "ext") {
-            return substr($this->frameSources[$this->frameNumber]["graphicsextension"], $start, $length);
-        }
-
-        // "dat"
-        return substr($this->frameSources[$this->frameNumber]["imagedata"], $start, $length);
-    }
-
-    /**
-     * Get the image data bit (old: get_imagedata_bit)
-     */
-    private function getImageDataBit(string $type, int $byteIndex, int $bitStart, int $bitLength): number
-    {
-        if ($type == "ext") {
-            return $this->readBits(ord(substr($this->frameSources[$this->frameNumber]["graphicsextension"], $byteIndex, 1)), $bitStart, $bitLength);
-        }
-
-        // "dat"
-        return $this->readBits(ord(substr($this->frameSources[$this->frameNumber]["imagedata"], $byteIndex, 1)), $bitStart, $bitLength);
-    }
-
-    /**
-     * Return the value of 2 ASCII chars (old: dualbyteval)
-     */
-    private function dualByteVal(string $s): int
-    {
-        $i = (ord($s[1]) * 256 + ord($s[0]));
-
-        return $i;
-    }
-
-    /**
-     * Read the data stream (old: read_data_stream)
-     */
-    private function readDataStream(int $firstLength)
-    {
-        $this->pointerForward($firstLength);
-        $length = $this->readByteInt();
-
-        if ($length != 0) {
-            while ($length != 0) {
-                $this->pointerForward($length);
-                $length = $this->readByteInt();
-            }
-        }
-    }
-
-    /**
-     * Open the gif file (old: loadfile)
-     */
-    private function openFile(string $filename)
-    {
-        $this->handle = fopen($filename, "rb");
-        $this->pointer = 0;
-
-        $imageSize = getimagesize($filename);
-        $this->gifWidth = $imageSize[0];
-        $this->gifHeight = $imageSize[1];
-    }
-
-    /**
-     * Close the read gif file (old: closefile)
-     */
-    private function closeFile()
-    {
-        fclose($this->handle);
-        $this->handle = 0;
-    }
-
-    /**
-     * Read the file from the beginning to $byteCount in binary (old: readbyte)
-     */
-    private function readByte(int $byteCount): string
-    {
-        $data = fread($this->handle, $byteCount);
-        $this->pointer += $byteCount;
-
-        return $data;
-    }
-
-    /**
-     * Read a byte and return ASCII value (old: readbyte_int)
-     */
-    private function readByteInt(): int
-    {
-        $data = fread($this->handle, 1);
-        $this->pointer++;
-
-        return ord($data);
-    }
-
-    /**
-     * Convert a $byte to decimal (old: readbits)
-     */
-    private function readBits(string $byte, int $start, int $length): number
-    {
-        $bin = str_pad(decbin($byte), 8, "0", STR_PAD_LEFT);
-        $data = substr($bin, $start, $length);
-
-        return bindec($data);
-    }
-
-    /**
-     * Rewind the file pointer reader (old: p_rewind)
-     */
-    private function pointerRewind(int $length)
-    {
-        $this->pointer -= $length;
-        fseek($this->handle, $this->pointer);
-    }
-
-    /**
-     * Forward the file pointer reader (old: p_forward)
-     */
-    private function pointerForward(int $length)
-    {
-        $this->pointer += $length;
-        fseek($this->handle, $this->pointer);
-    }
-
-    /**
-     * Get a section of the data from $start to $start + $length (old: datapart)
-     */
-    private function dataPart(int $start, int $length): string
-    {
-        fseek($this->handle, $start);
-        $data = fread($this->handle, $length);
-        fseek($this->handle, $this->pointer);
-
-        return $data;
-    }
-
-    /**
-     * Check if a character if a byte (old: checkbyte)
-     */
-    private function checkByte(int $byte): bool
-    {
-        if (fgetc($this->handle) == chr($byte)) {
-            fseek($this->handle, $this->pointer);
-            return true;
-        }
-
-        fseek($this->handle, $this->pointer);
-
-        return false;
-    }
-
-    /**
-     * Check the end of the file (old: checkEOF)
-     */
-    private function checkEOF(): bool
-    {
-        if (fgetc($this->handle) === false) {
-            return true;
-        }
-
-        fseek($this->handle, $this->pointer);
-
-        return false;
-    }
-
-    /**
-     * Reset and clear this current object
-     */
-    private function reset()
-    {
-        $this->gif = null;
-        $this->totalDuration = $this->gifMaxHeight = $this->gifMaxWidth = $this->handle = $this->pointer = $this->frameNumber = 0;
-        $this->frameDimensions = $this->framePositions = $this->frameImages = $this->frameDurations = $this->globaldata = $this->orgvars = $this->frames = $this->fileHeader = $this->frameSources = [];
-    }
-
-    // Getter / Setter
-    // ===================================================================================
-
-
-    /**
-     * Get the total of all added frame duration
-     */
-    public function getTotalDuration(): int
-    {
-        return $this->totalDuration;
-    }
-
-    /**
-     * Get the number of extracted frames
-     */
-    public function getFrameNumber(): int
-    {
-        return $this->frameNumber;
-    }
-
-    /**
-     * Get the extracted frames (images and durations)
-     */
-    public function getFrames(): array
-    {
-        return $this->frames;
-    }
-
-    /**
-     * Get the extracted frame positions
-     */
-    public function getFramePositions(): array
-    {
-        return $this->framePositions;
-    }
-
-    /**
-     * Get the extracted frame dimensions
-     */
-    public function getFrameDimensions(): array
-    {
-        return $this->frameDimensions;
-    }
-
-    /**
-     * Get the extracted frame images
-     */
-    public function getFrameImages(): array
-    {
-        return $this->frameImages;
-    }
-
-    /**
-     * Get the extracted frame durations
-     */
-    public function getFrameDurations(): array
-    {
-        return $this->frameDurations;
-    }
-}