package com.iplatform.base.captcha;
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import com.iplatform.base.util.CaptchaUtils;
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import com.walker.cache.CacheProvider;
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import com.walker.infrastructure.utils.StringUtils;
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import com.walker.web.CaptchaProvider;
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import com.walker.web.CaptchaResult;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.core.io.DefaultResourceLoader;
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import org.springframework.core.io.ResourceLoader;
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import javax.imageio.ImageIO;
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import java.awt.Font;
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import java.awt.image.BufferedImage;
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import java.util.Map;
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import java.util.Random;
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import java.util.concurrent.ConcurrentHashMap;
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public abstract class AbstractCaptchaProvider implements CaptchaProvider<CaptchaResult> {
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protected final transient Logger logger = LoggerFactory.getLogger(this.getClass());
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protected final ResourceLoader resourceLoader = new DefaultResourceLoader();
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// 所有验证图片都加入内存，降低磁盘读写
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// protected Map<String, BufferedImage> imageCacheMap = new ConcurrentHashMap<>(32);
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protected final Random bgRandom = new Random();
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protected final Random blockRandom = new Random();
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protected static final String IMAGE_TYPE_PNG = "png";
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protected static final String IMAGE_TYPE_JPG = "jpg";
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// 该字段含义不详！
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protected static int captchaInterferenceOptions = 0;
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protected static final int SLIP_OFFSET = 6;
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protected static String waterMark = "我的水印";
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protected static String waterMarkFontStr = "WenQuanZhengHei.ttf";
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protected Font waterMarkFont;//水印字体
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@Override
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public boolean validateCaptcha(CaptchaResult data) {
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String verifyKey = CaptchaUtils.getVerifyKey(data);
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String xSource = this.captchaCacheProvider.getCacheData(verifyKey);
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if(StringUtils.isEmpty(xSource)){
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logger.error("拼图验证信息已失效!");
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return false;
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}
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// 删除缓存的验证码
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// 注意：这里不能删除缓存验证结果，因为登录接口还要再次使用。2023-04-07
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// this.captchaCacheProvider.removeCacheData(verifyKey);
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// 前端传过来的数字，可能包含小数，所以不能直接'Integer.parseInt'转换。
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int xValidate = Double.valueOf(data.getCode()).intValue();
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int xGenerate = Integer.parseInt(xSource);
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if ((xValidate - xGenerate) <= SLIP_OFFSET && (xValidate - xGenerate) >= -SLIP_OFFSET) {
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return true;
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}
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return false;
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}
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BufferedImage loadBufferedImage(String imageName) throws Exception{
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if(StringUtils.isEmpty(imageName)){
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throw new IllegalArgumentException("验证码图片名称参数缺失：imageName");
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}
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return ImageIO.read(resourceLoader.getResource(imageName).getInputStream());
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}
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public void setCaptchaCacheProvider(CacheProvider<String> captchaCacheProvider) {
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this.captchaCacheProvider = captchaCacheProvider;
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}
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protected CacheProvider<String> captchaCacheProvider;
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}
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