wangdu_public_api/app/Libs/ChapterToImage.php

<?php
/**
 * Created by PhpStorm.
 * User: tandunzhao
 * Date: 2018/1/19
 * Time: 上午9:47
 */

namespace App\Libs;

use App\Modules\Book\Services\ChapterImageService;
use App\Modules\Book\Services\ChapterService;
use Log;
use Hashids;

class ChapterToImage
{

    public static function createChapterImage($bookId, $style = 0,$chapters) {
        //$chapters = ChapterService::getTopFiveChapter($bookId);
        foreach ($chapters as $chapter) {
            //画标题
            if(ChapterImageService::getChapterImage($chapter['bid'],[$chapter['id']])->count()){

            }else{
                self::drawTxt(self::to_unicode($chapter['name']), $chapter['bid'], $chapter['sequence'], $chapter['id'], -1, $style);
                $content = str_replace($chapter['name'],'',$chapter['content']);
                self::createChapterContentToImage(self::to_unicode($content), $chapter['bid'], $chapter['sequence'], $chapter['id'], $style);
            }
        }

        $imagePath = public_path("chapter");
        self::del_dir($imagePath);
    }

    private static function createChapterContentToImage($inputString, $bookId, $sequence, $chapterId, $style = 0) {
        if(!$inputString || empty($inputString)) {
            $inputString = "";
        }
        $inputStrings = explode("\n", $inputString);

        $imageIndex = 1;

        if(sizeof($inputStrings) < 5) {
            self::drawTxt($inputString, $bookId, $sequence, $chapterId, $imageIndex, $style);

        } else {
            $imageTextString = "";
            $index = 1;
            foreach ($inputStrings as $strTmp) {
                $strTmp = self::trimAllSpace($strTmp);

                if($strTmp && !empty($strTmp)) {
                    $imageTextString .= $strTmp."\n";

                    if($index % 4 == 0) {
                        self::drawTxt($imageTextString, $bookId, $sequence, $chapterId, $imageIndex, $style);
                        $imageIndex++;

                        $imageTextString = "";
                        $index = 0;
                    }
                    $index++;
                } else {
                }
            }

            if(!empty($imageTextString)) {
                self::drawTxt($imageTextString, $bookId, $sequence, $chapterId, $imageIndex, $style);
            }
        }
    }


    private static function drawTxt($inputString, $bookId, $sequence, $chapterId, $index, $style = 0) {
        if(!$inputString || empty($inputString)) {
            $inputString = "";
        }

        $width = 640;
        $temp = array("color" => array(1, 1, 1), "font-size" =>32, "width" => $width, "left" => 0, "top" => 15 ,"hang-size" => 35, "duan-size" => 10);

        $bg = imagecreatetruecolor($width, 90); // 创建画布
        $str_height = self::drawTxtToImage($bg, $temp, $inputString, false);
        imagedestroy($bg);

        $im = ImageCreate($width, $str_height);
        $bgA = imagecolorallocate($im, 255, 255, 255);
        $str_h = self::drawTxtToImage($im, $temp, $inputString, true);

        $imagePath = public_path("chapter/".$bookId."/".$sequence."/");
        $dir = iconv("UTF-8", "UTF-8", $imagePath);
        if (!file_exists($dir)){
            mkdir ($dir,0777,true);
        }

        $imagePath .= $index."_".$style."_".time().".jpg";

        imagepng($im, $imagePath);
        imagedestroy($im);
        Log::info($imagePath);

//        Log::info("书ID[".$bookId."]章节ID[".$chapterId."] ".$imagePath."      ".date("y-m-d H:i:s"."\n"));
        $ossPath = "book_chapter_image_new/" . Hashids::encode($bookId) . "/" . $sequence . "/" . $index."_".$style."_".time(). ".jpg";
        if(env('PAYMENT_AUTO_PAY_TEST') != 2) {
            $ossPath = "book_chapter_image_test/" . Hashids::encode($bookId) . "/" . $sequence . "/" . $index."_".$style."_".time() . ".jpg";
        }

        $imageUrl = AliOSS::uploadImg($ossPath, $imagePath);
//        Log::info("".$imageUrl."      ".date("y-m-d H:i:s"."\n"));
        $imageUrl = str_ireplace('zhuishuyun.oss-cn-hangzhou.aliyuncs.com','cdn-novel.iycdm.com',$imageUrl);
        ChapterImageService::save($bookId, $chapterId, $sequence, $index, $imageUrl);
    }

    private static function drawTxtToImage($card, $pos, $inputString, $isWrite) {
        if(!$inputString || empty($inputString)) {
            $inputString = "";
        }

        $width = $pos["width"];
        $fontSize = $pos["font-size"];
        $fontFile = self::getFontFile();
        $fontColor = imagecolorallocate($card, $pos["color"][0], $pos["color"][1], $pos["color"][2]);

        $textOneWidth = self::getTextOneWidth($pos);
        $textOneWidthAndPace = self::getTextOneWidthAndPace($pos);
        $marginLeft = $pos["left"] + $textOneWidth * 0.5;
        $width = $width - $pos["left"] - $textOneWidth;

        $duanSize = $pos["duan-size"];
        $hangSize = $pos["hang-size"];

        $lineTextHeight = self::getTextLineHeight($pos);
        $_str_h = $lineTextHeight * 0.8 + $pos["top"];

        $textHeight = $pos["top"];
//        $textHeight += $hangSize;
//        $textHeight += $lineTextHeight;

        $inputStrings = explode("\n", $inputString);

        foreach ($inputStrings as $strTmp) {
            $strTmp = self::trimAllSpace($strTmp);
            if(empty($strTmp)) {
                continue;
            }

            //CentOS 服务器上生成图片，一个空格 算一个汉字的长度，暂时测试是这样的
            $strTmp = "  ".$strTmp;
            $drawTextStr = "";
            $letter = [];
            for ($i=0;$i<mb_strlen($strTmp);$i++) {
                $letter[] = mb_substr($strTmp, $i, 1);
            }

            $ttfText = imagettftext($card, $fontSize, 0, 0, -$lineTextHeight, $fontColor, $fontFile, $strTmp);
//            dd($ttfText);
//            Log::info("".$ttfText[2]."  ===  ".$strTmp);

            if($ttfText[2] <= $width) {
                $textHeight += $hangSize;
                $textHeight += $lineTextHeight;

                $drawTextStr = $strTmp;
            } else {
                $lineNum = 0;

                $content = "";
                for ($i=0; $i<sizeof($letter); $i++) {
                    $content .= $letter[$i];
                    $ttfText = imagettftext($card, $fontSize, 0, $marginLeft, -$lineTextHeight, $fontColor, $fontFile, $content);


//                    if(strpos($drawTextStr,"记忆里还有几道模糊的影，") !== false){
//                        Log::error("图片高度 01  ===  ".$drawTextStr  ."   ===    ". $content . "    ".$ttfText[2]."  width= ".$width);
//                    }
//                    if(strpos($drawTextStr,"心里清楚厉墨风回来过了") !== false){
//                        Log::error("图片高度 1  ===  ".$drawTextStr  ."   ===    ". $content . "    ".$ttfText[2]."  width= ".$width);
//                        Log::error("图片高度 2 ===  lineNum = ".$lineNum. "    (sizeof(letter) = ". sizeof($letter) . "  (i + 1) = "  .($i + 1). "    ".((sizeof($letter) == ($i + 1)) && $lineNum > 0));
//                    }
                    if($ttfText[2] > $width) {
//                        dd($width);
//                        dd($content);
//                        dd($ttfText);
                        $drawTextStr.="\\n";
                        $textHeight += $hangSize;
                        $textHeight += $lineTextHeight;
                        $content = "";

                        $lineNum++;

                        if((sizeof($letter) == ($i + 1)) && $lineNum > 0) {
                            $textHeight += $hangSize;
                            $textHeight += $lineTextHeight;
                            $lineNum++;
                        }
                    } else {
                        if((sizeof($letter) == ($i + 1)) && $lineNum > 0) {
                            $textHeight += $hangSize;
                            $textHeight += $lineTextHeight;
                            $lineNum++;
                        }
                    }
                    $drawTextStr .= ($letter[$i]."");
                }
            }

            if ($isWrite) {
                $drawTextStrs = explode("\\n", $drawTextStr);
                $lineIndex = 0;
                foreach ($drawTextStrs as $lee) {
                    $ttfText = imagettftext($card, $fontSize, 0, $marginLeft, $_str_h, $fontColor, $fontFile, $lee);
                    $_str_h += $lineTextHeight;
                    $_str_h += $hangSize;
                    $lineIndex++;
                }

                $_str_h += $duanSize;
            }
            $textHeight += $duanSize;
        }
        return $textHeight;
    }



    private static function getTextLineHeight($pos) {
        $fontSize = $pos["font-size"];
        $fontFile = self::getFontFile();

        $ttfBoxTemp = imagettfbbox($fontSize, 0, $fontFile, self::to_unicode("啊"));
        $textHeight = $height = ($ttfBoxTemp[3] - $ttfBoxTemp[5]);

        return $textHeight;
    }

    private static function getTextOneWidth($pos) {
        $fontSize = $pos["font-size"];
        $fontFile = self::getFontFile();

        $ttfBoxTemp = imagettfbbox($fontSize, 0, $fontFile, self::to_unicode("啊"));
        $textWidth = $width = ($ttfBoxTemp[4] - $ttfBoxTemp[6]);
        $textWidth = $textWidth;

        return $textWidth;
    }

    private static function to_unicode($string)
    {
//        $str = mb_convert_encoding($string, 'UCS-2', 'UTF-8');
//        $arrstr = str_split($str, 2);
//        $unistr = '';
//        foreach ($arrstr as $n) {
//            $dec = hexdec(bin2hex($n));
//            $unistr .= '&#' . $dec . ';';
//        }
//        return $unistr;
//        $arr = mb_convert_encoding($string, "html-entities","utf-8");
//        return $arr;
        return $string;
    }

    private static function getTextOneWidthAndPace($pos) {
        $textWidth = self::getTextOneWidth($pos);
        $textWidth = $textWidth +  $textWidth / 9;
        return $textWidth;
    }

    private static function getFontFile() {
        return public_path('fonts/jdytj.TTF');
    }

    private static function trimAllSpace($str) {
        $str = trim($str);
        $str = str_replace(" ","",$str);
        $str = str_replace("  ","",$str);
        $str = str_replace("   ","",$str);
        $str = str_replace("    ","",$str);
        $str = str_replace("　","",$str);
        $str = str_replace("\t","",$str);
        $str = str_replace("\n","",$str);
        $str = str_replace("    ","",$str);
        $str = preg_replace("/\t/","", $str);
        $str = preg_replace("/\r/","",$str);
        $str = preg_replace("/\n/","",$str);
        $str = preg_replace("/\r\n/","",$str);
        $str = preg_replace("/ /","",$str);
        $str = preg_replace("/  /","",$str);
        $str = preg_replace('/($s*$)|(^s*^)/m', '',$str);

        $str = preg_replace("/,/","，", $str);
        return trim($str); //返回字符串
    }


    private static function del_dir($dir) {

        //TODO 重要操作，仔细检测
        if(strpos($dir, "zhuishuyun/public/chapter") !== false) {
            if(strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
                $str = "rmdir /s/q " . $dir;
            } else {
                $str = "rm -Rf " . $dir;
            }
            exec($str);
        }
    }
}