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30209 amit.gupta 1
package com.smartdukaan.cron.scheduled;
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3
import nu.pattern.OpenCV;
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import org.apache.commons.io.FileUtils;
5
import org.apache.logging.log4j.LogManager;
6
import org.apache.logging.log4j.Logger;
7
import org.opencv.core.Mat;
34413 amit.gupta 8
import org.opencv.core.Size;
30209 amit.gupta 9
import org.opencv.imgcodecs.Imgcodecs;
10
import org.opencv.imgproc.Imgproc;
37423 amit 11
import org.json.JSONObject;
30209 amit.gupta 12
import org.openqa.selenium.*;
13
import org.openqa.selenium.chrome.ChromeDriver;
14
import org.openqa.selenium.chrome.ChromeOptions;
15
import org.openqa.selenium.interactions.Actions;
16
import org.openqa.selenium.support.ui.ExpectedConditions;
17
import org.openqa.selenium.support.ui.WebDriverWait;
30373 amit.gupta 18
import org.springframework.stereotype.Component;
30209 amit.gupta 19
 
20
import javax.imageio.ImageIO;
21
import java.awt.image.BufferedImage;
22
import java.io.File;
23
import java.time.LocalDate;
24
import java.time.format.DateTimeFormatter;
25
import java.util.HashMap;
26
import java.util.List;
27
import java.util.Map;
28
import java.util.concurrent.TimeUnit;
29
import java.util.stream.Collectors;
30
 
30373 amit.gupta 31
@Component
34416 amit.gupta 32
public class CheckRealmeWarrantyTask {
30209 amit.gupta 33
 
34416 amit.gupta 34
    private static final Logger LOGGER = LogManager.getLogger(CheckRealmeWarrantyTask.class);
30209 amit.gupta 35
 
36253 amit 36
    static {
36306 amit 37
        try {
38
            OpenCV.loadShared();
39
        } catch (Throwable t) {
40
            LogManager.getLogger(CheckRealmeWarrantyTask.class).warn("OpenCV not available on this platform: {}", t.getMessage());
41
        }
36253 amit 42
    }
43
 
32146 amit.gupta 44
    public Map<String, LocalDate> checkWarranty(List<String> imeis) {
45
        Map<String, LocalDate> dateMap = new HashMap<>();
46
        LOGGER.info("Initiating webdriver...");
30209 amit.gupta 47
 
32146 amit.gupta 48
        Map<String, Object> prefsMap = new HashMap<>();
49
        prefsMap.put("profile.default_content_settings.popups", 0);
50
        prefsMap.put("download.prompt", false);
51
        prefsMap.put("download.directory_upgrade", true);
34413 amit.gupta 52
        System.setProperty("webdriver.chrome.driver", "/usr/bin/chromedriver");
32146 amit.gupta 53
        //I need this
34413 amit.gupta 54
        //System.setProperty("webdriver.chrome.driver", "/Users/amit/cft/chromedriver/chromedriver");
32146 amit.gupta 55
        ChromeOptions options = new ChromeOptions();
34413 amit.gupta 56
        //options.setBinary("/Users/amit/cft/chrome/Google Chrome for Testing.app/Contents/MacOS/Google Chrome For Testing");
32146 amit.gupta 57
        options.setExperimentalOption("prefs", prefsMap);
58
        //options.setExperimentalOption("detach", true);
59
        options.addArguments("--headless");
34419 amit.gupta 60
        options.addArguments("--user-agent=\"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36\"");
30209 amit.gupta 61
 
32146 amit.gupta 62
        options.addArguments("--no-sandbox");
63
        options.addArguments("start-maximized");
64
        options.addArguments("disable-infobars");
65
        options.addArguments("--disable-extensions");
66
        options.addArguments("--force-device-scale-factor=1");
67
        options.addArguments("--test-type");
34420 amit.gupta 68
        options.addArguments(
69
                "--disable-blink-features=AutomationControlled",
70
                "--disable-infobars",
71
                "--disable-popup-blocking",
72
                "--disable-notifications",
73
                "--disable-extensions"
74
        );
30209 amit.gupta 75
 
34679 amit.gupta 76
        WebDriver driver = null;
30209 amit.gupta 77
 
34679 amit.gupta 78
        try {
79
            driver = new ChromeDriver(options);
80
            driver.manage().timeouts().setScriptTimeout(6, TimeUnit.SECONDS);
81
            driver.manage().window().setSize(new Dimension(1600, 900));
82
            driver.manage().window().maximize();
83
            // Deleting all the cookies
84
            driver.manage().deleteAllCookies();
85
            // Specifiying pageLoadTimeout and Implicit wait
86
            driver.manage().timeouts().pageLoadTimeout(15, TimeUnit.SECONDS);
87
            driver.manage().timeouts().implicitlyWait(9, TimeUnit.SECONDS);
88
 
89
            int mainCount = 0;
90
            List<String> remainingImeis = imeis;
91
            WebDriverWait wait10Sec = new WebDriverWait(driver, 15);
92
            WebDriverWait wait5Sec = new WebDriverWait(driver, 4);
93
            WebElement slideButton;
94
            Actions actionProvider = new Actions(driver);
95
            do {
96
                driver.get("https://www.realme.com/in/support/phonecheck");
37423 amit 97
                installResponseCapture(driver);
34424 amit.gupta 98
            /*try {
34415 amit.gupta 99
                driver.findElement(By.cssSelector(".cp-cookie-tip a.close")).click();
100
            } catch (Exception e) {
101
                try {
37423 amit 102
                    LOGGER.info("Cookie not found");
34415 amit.gupta 103
                } catch (Exception e1) {
104
                }
34424 amit.gupta 105
            }*/
34415 amit.gupta 106
 
34679 amit.gupta 107
                for (int i = 0; i < remainingImeis.size(); i++) {
108
                    String imei = remainingImeis.get(i);
109
                    try {
37423 amit 110
                        LOGGER.info("Starting fresh with new IMEI " + imei);
111
                        // realme rebuilt this page: the field is no longer .sn-input and the
112
                        // submit is no longer div.check-btn but an icon inside the same box.
113
                        if (driver.findElement(By.cssSelector(IMEI_INPUT)).getAttribute("value").length() > 0) {
34679 amit.gupta 114
                            //System.out.println("Darn.. leaving" + driver.findElement(By.className("el-input__inner")).getAttribute("value"));
115
                            driver.get("https://www.realme.com/in/support/phonecheck");
37423 amit 116
                installResponseCapture(driver);
34679 amit.gupta 117
                            break;
118
                        }
37423 amit 119
                        driver.findElement(By.cssSelector(IMEI_INPUT)).sendKeys(imei);
30209 amit.gupta 120
 
34679 amit.gupta 121
                        //driver.findElement(By.className("el-button--primary")).click();
37423 amit 122
                        driver.findElement(By.cssSelector(SUBMIT_ICON)).click();
34413 amit.gupta 123
 
34679 amit.gupta 124
                        // Perform click-and-hold action on the element
125
                        int counter = 1;
126
                        boolean captchaNotBroken = true;
127
                        do {
128
                            String fileName = "/tmp/oppo-simple-i-" + counter + " " + System.currentTimeMillis() + ".png";
129
                            try {
37423 amit 130
                                LOGGER.info("Starting Do");
34679 amit.gupta 131
                                //Thread.sleep(5000);
132
                                wait10Sec.until(ExpectedConditions.visibilityOfElementLocated(By.tagName("canvas")));
34420 amit.gupta 133
 
34679 amit.gupta 134
                                wait10Sec.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_bg_')]")));
135
                                wait10Sec.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_wrapper_')]")));
136
                                wait10Sec.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_slider_')]")));
137
                                slideButton = driver.findElement(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_slider_')]"));
138
                                //System.out.println("Slide button - " + slideButton);
37423 amit 139
                                LOGGER.info("Margin Left before- " + slideButton.getCssValue("margin-left"));
34679 amit.gupta 140
                                actionProvider.moveToElement(slideButton).clickAndHold()
141
                                        .moveByOffset(1, 0)//.pause(2000)
142
                                        .perform();
34413 amit.gupta 143
 
34679 amit.gupta 144
                                //actionProvider.moveByOffset(-1,0).pause(2000).perform();
37423 amit 145
                                LOGGER.info("Margin Left after - " + slideButton.getCssValue("margin-left"));
34679 amit.gupta 146
                                //Thread.sleep(5000);
147
                            } catch (Exception e) {
37423 amit 148
                                LOGGER.info(e.getMessage());
34679 amit.gupta 149
                                driver.get("https://www.realme.com/in/support/phonecheck");
37423 amit 150
                installResponseCapture(driver);
34679 amit.gupta 151
                                break;
152
                            }
153
                            double[] circles = getMatCircles2(driver, fileName);
154
                            if (circles != null) {
155
                                double firstCircleX = circles[0];
156
                                double secondCircleX = circles[1];
157
                                double distance = Math.abs(firstCircleX - secondCircleX);
37423 amit 158
                                LOGGER.info("Distance is " + distance);
30209 amit.gupta 159
 
37423 amit 160
                                double[] cal = calibrate(driver, actionProvider, distance);
161
                                int moveByOffset = cal == null ? 0 : (int) cal[0];
34679 amit.gupta 162
                                if (moveByOffset > 0) {
37423 amit 163
                                    // Move, measure again, close the remainder, THEN release.
164
                                    actionProvider.moveByOffset(moveByOffset, 0).perform();
165
                                    refine(driver, actionProvider, cal[1]);
166
                                    actionProvider.release().perform();
167
                                    LOGGER.info("Move click performed (main {}px)", moveByOffset);
32146 amit.gupta 168
                                    try {
34679 amit.gupta 169
                                        try {
170
                                            wait5Sec.until(ExpectedConditions.visibilityOfElementLocated(By.className("dx_captcha_basic_bar-inform")));
37423 amit 171
                                            LOGGER.warn("Failed = " + counter);
34679 amit.gupta 172
                                        } catch (Exception notFailedException) {
37423 amit 173
                                            LOGGER.info("Success  at attempt " + counter);
34679 amit.gupta 174
                                            //List<WebElement> warrantyDateElements = driver.findElements(By.className("warranty-service--result_info__dateValue"));
175
                                            //WebElement activationTimeElement = driver.findElement(By.xpath("//*[contains(text(), 'UTC+5.5')  or contains(text(), 'Non-Activate')]"));
37423 amit 176
                                            // Read the JSON the page already received. The old locator
177
                                            // keyed off a label that no longer exists, and its "| //h1" branch
178
                                            // would silently grab a page heading and try to parse it as a date.
179
                                            // The API is explicit: expiryDate (yyyy.MM.dd) plus an isActivation
180
                                            // flag, so nothing has to be inferred from message text.
181
                                            String json = capturedResponse(driver);
182
                                            LocalDate activationDate = activationFrom(json);
34416 amit.gupta 183
 
37423 amit 184
                                            if (json == null) {
185
                                                LOGGER.warn("Result shown but no active/check response captured for imei {}", imei);
34679 amit.gupta 186
                                            } else {
37423 amit 187
                                                LOGGER.info("Activation lookup for {} -> {}", imei,
188
                                                        activationDate != null ? activationDate : "not activated");
32146 amit.gupta 189
                                            }
37423 amit 190
                                            // Always record, even with a null date. findElement used to THROW
191
                                            // when the element was missing, so nothing was written and the imei
192
                                            // came back on every run indefinitely.
193
                                            dateMap.put(imei, activationDate);
194
                                            clearCapture(driver);
195
 
34679 amit.gupta 196
                                            if (dateMap.size() == imeis.size()) {
197
                                                return dateMap;
198
                                            }
199
                                            WebElement checkAgainButton = driver.findElement(By.className("recheck-btn"));
200
                                            captchaNotBroken = false;
201
                                            checkAgainButton.click();
202
                                            break;
32146 amit.gupta 203
                                        }
34679 amit.gupta 204
                                    } catch (Throwable e) {
37423 amit 205
                                        LOGGER.warn("Failed = " + counter + " ----------" + e.getMessage());
32146 amit.gupta 206
                                    }
207
                                }
208
                            }
37423 amit 209
                            LOGGER.info("After circles conditions");
34679 amit.gupta 210
                            wait10Sec.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_wrapper_')]")));
211
                            wait10Sec.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_slider_')]")));
212
                            slideButton = driver.findElement(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_slider_')]"));
213
                            actionProvider.moveToElement(slideButton).doubleClick().perform();
37423 amit 214
                            LOGGER.info("Ending Do" + counter++);
30209 amit.gupta 215
 
34679 amit.gupta 216
                        } while (captchaNotBroken && counter <= 20);
37423 amit 217
                        LOGGER.warn("Counter reached upto 20");
34679 amit.gupta 218
                    } catch (Exception e) {
37423 amit 219
                        LOGGER.info("Caught unknown - for imei " + imei);
220
                        LOGGER.error("Realme warranty check failed for imei " + imei, e);
34679 amit.gupta 221
                    }
222
                    driver.get("https://www.realme.com/in/support/phonecheck");
37423 amit 223
                installResponseCapture(driver);
34679 amit.gupta 224
                }
225
                mainCount++;
226
                remainingImeis = imeis.stream().filter(x -> !dateMap.containsKey(x)).collect(Collectors.toList());
36253 amit 227
                if (remainingImeis.isEmpty()) break;
34679 amit.gupta 228
            } while (mainCount < 5);
229
        } finally {
230
            if (driver != null) {
231
                try {
34681 amit.gupta 232
                    driver.quit();  // Always shuts everything down
32146 amit.gupta 233
                } catch (Exception e) {
37423 amit 234
                    LOGGER.warn("Error closing driver: " + e.getMessage());
32146 amit.gupta 235
                }
236
            }
34679 amit.gupta 237
        }
238
 
32146 amit.gupta 239
        return dateMap;
240
    }
30352 amit.gupta 241
 
34679 amit.gupta 242
 
37423 amit 243
    /** realme rebuilt the page; the old .sn-input / div.check-btn no longer render. */
244
    private static final String IMEI_INPUT  = ".imei-input input";
245
    private static final String SUBMIT_ICON = ".imei-input .search-icon";
30209 amit.gupta 246
 
37423 amit 247
    /**
37424 amit 248
     * Calibration nudge, in slider px, sized from the gap rather than fixed.
249
     *
250
     * A fixed 15px was far too small: it closed only ~25px, so the ratio came from a
251
     * measurement ~20% noise and the aim landed ~30px out. A fixed 60px then proved too
252
     * large in the other direction -- production data showed 85% of attempts with a gap
253
     * under 60px ended up UNUSABLE (the piece shot past the hole and the measured gap
254
     * grew), and 45% overall.
255
     *
256
     * Aim to close about half the gap: the piece travels roughly ASSUMED_RATIO px per
257
     * slider px, so nudge ~= gap / (2 * ratio), clamped. The real ratio is still derived
258
     * from the measurement; this only sizes the probe.
37423 amit 259
     */
37424 amit 260
    private static final double ASSUMED_RATIO = 1.7;
261
    private static final int MIN_NUDGE = 10;
262
    private static final int MAX_NUDGE = 60;
37423 amit 263
    private static final double ALIGNED_PX = 2.0;
264
 
37424 amit 265
    private static int nudgeFor(double gap) {
266
        int n = (int) Math.round(gap / (2 * ASSUMED_RATIO));
267
        return Math.max(MIN_NUDGE, Math.min(MAX_NUDGE, n));
268
    }
269
 
37423 amit 270
    /** Stash the active/check response on window as the page receives it. */
271
    private void installResponseCapture(WebDriver driver) {
272
        try {
273
            ((JavascriptExecutor) driver).executeScript(
274
                "if (!window.__rmCapInstalled) {"
275
              + "  window.__rmCapInstalled = true; window.__rmResp = null;"
37425 amit 276
              // axios can sit on either transport, and realme's page uses fetch --
277
              // an XHR-only hook silently captures nothing, which is exactly what
278
              // 'no active/check response captured' was reporting.
37423 amit 279
              + "  var O = XMLHttpRequest.prototype.open;"
280
              + "  XMLHttpRequest.prototype.open = function(m,u){"
281
              + "    this.addEventListener('load', function(){"
282
              + "      try { if (String(u).indexOf('active/check') !== -1) window.__rmResp = this.responseText; } catch(e){}"
283
              + "    });"
284
              + "    return O.apply(this, arguments);"
285
              + "  };"
37425 amit 286
              + "  var F = window.fetch;"
287
              + "  if (F) { window.fetch = function(){"
288
              + "    var u = arguments[0]; u = (u && u.url) ? u.url : String(u);"
289
              + "    return F.apply(this, arguments).then(function(r){"
290
              + "      try { if (u.indexOf('active/check') !== -1) { r.clone().text().then(function(t){ window.__rmResp = t; }); } } catch(e){}"
291
              + "      return r;"
292
              + "    });"
293
              + "  }; }"
37423 amit 294
              + "}");
295
        } catch (Exception e) {
296
            LOGGER.warn("Could not install the response capture hook: " + e.getMessage());
297
        }
298
    }
299
 
300
    private String capturedResponse(WebDriver driver) {
301
        try {
302
            Object v = ((JavascriptExecutor) driver).executeScript("return window.__rmResp || null;");
303
            return v == null ? null : v.toString();
304
        } catch (Exception e) {
305
            return null;
306
        }
307
    }
308
 
309
    private void clearCapture(WebDriver driver) {
310
        try {
311
            ((JavascriptExecutor) driver).executeScript("window.__rmResp = null;");
312
        } catch (Exception ignored) {
313
        }
314
    }
315
 
316
    /**
317
     * realme returns the WARRANTY EXPIRY, not the activation date, so a year is
318
     * subtracted -- warranty is 12 months as standard. Verified against our own
319
     * records: 41,267 of 41,289 stored Realme activation dates precede the date we
320
     * checked them, averaging 13 days before, which is only consistent with the
321
     * subtraction being applied. isActivation false means the device is not
322
     * activated yet and there is no date to derive.
323
     */
324
    private LocalDate activationFrom(String json) {
325
        if (json == null) return null;
326
        try {
327
            JSONObject root = new JSONObject(json);
328
            JSONObject data = root.optJSONObject("data");
329
            if (data == null) return null;
330
            if (!data.optBoolean("isActivation", false)) return null;
331
 
332
            String expiry = data.optString("expiryDate", "");
333
            if (expiry == null || expiry.trim().isEmpty() || "null".equals(expiry)) return null;
334
 
335
            return LocalDate.parse(expiry.trim().split(" ")[0],
336
                    DateTimeFormatter.ofPattern("yyyy.MM.dd")).minusYears(1);
337
        } catch (Exception e) {
338
            LOGGER.warn("Could not read expiryDate from the realme response: " + e.getMessage());
339
            return null;
340
        }
341
    }
342
 
343
    /** @return {sliderPxToMove, sliderPxPerCirclePx}, or null if the circles were unreadable. */
344
    private double[] calibrate(WebDriver driver, Actions actionProvider, double distance) throws Exception {
37424 amit 345
        int nudge = nudgeFor(distance);
346
        actionProvider.moveByOffset(nudge, 0).perform();
37423 amit 347
 
32146 amit.gupta 348
        String fileName2 = "/tmp/" + Thread.currentThread().getName() + "-moved.png";
34413 amit.gupta 349
        double[] movedCircles = getMatCircles2(driver, fileName2);
37423 amit 350
        if (movedCircles == null) return null;
351
 
352
        double movedDistance = Math.abs(movedCircles[0] - movedCircles[1]);
353
        double closed = distance - movedDistance;
354
        LOGGER.info("Calibration: gap {} -> {} after {}px, closed {}",
37424 amit 355
                distance, movedDistance, nudge, closed);
37423 amit 356
        if (closed <= 0) return null;
357
 
37424 amit 358
        double sliderPerCircle = nudge / closed;
37423 amit 359
        return new double[]{Math.round(movedDistance * sliderPerCircle), sliderPerCircle};
32146 amit.gupta 360
    }
30209 amit.gupta 361
 
37423 amit 362
    /** Measure again after the main move and close the remainder before releasing. */
363
    private int refine(WebDriver driver, Actions actionProvider, double sliderPerCircle) throws Exception {
364
        String fileName = "/tmp/" + Thread.currentThread().getName() + "-refine.png";
365
        double[] circles = getMatCircles2(driver, fileName);
366
        if (circles == null) return 0;
367
 
368
        double remaining = Math.abs(circles[0] - circles[1]);
369
        if (remaining <= ALIGNED_PX) return 0;
370
 
371
        int correction = (int) Math.round(remaining * sliderPerCircle);
372
        if (correction == 0) return 0;
373
        LOGGER.info("Refine: {}px of gap left -> nudging {}px", remaining, correction);
374
        actionProvider.moveByOffset(correction, 0).perform();
375
        return correction;
376
    }
377
 
32146 amit.gupta 378
    private Mat getMatCircles(WebDriver driver, String fileName) throws Exception {
30209 amit.gupta 379
 
32146 amit.gupta 380
        File screenshot = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
381
        BufferedImage fullImg = ImageIO.read(screenshot);
30209 amit.gupta 382
 
32146 amit.gupta 383
        // Get the location of element on the page
384
        WebElement imageElement = driver.findElement(By.id("dx_captcha_basic_bg_1"));
385
        Point point = imageElement.getLocation();
30209 amit.gupta 386
 
32146 amit.gupta 387
        // Get width and height of the element
388
        int eleWidth = imageElement.getSize().getWidth();
389
        int eleHeight = imageElement.getSize().getHeight();
30209 amit.gupta 390
 
32146 amit.gupta 391
        // Crop the entire page screenshot to get only element screenshot
392
        BufferedImage eleScreenshot = fullImg.getSubimage(point.getX(), point.getY(),
393
                eleWidth, eleHeight);
394
        ImageIO.write(eleScreenshot, "png", screenshot);
30209 amit.gupta 395
 
32146 amit.gupta 396
        // Copy the element screenshot to disk
397
        File screenshotLocation = new File(fileName);
398
        FileUtils.copyFile(screenshot, screenshotLocation);
30209 amit.gupta 399
 
32146 amit.gupta 400
        Imgcodecs imageCodecs = new Imgcodecs();
401
        Mat grayMatrix = imageCodecs.imread(fileName, Imgcodecs.IMREAD_COLOR);
402
        Imgproc.cvtColor(grayMatrix, grayMatrix, Imgproc.COLOR_BGR2GRAY);
403
        Mat medianBlur = new Mat();
404
        Imgproc.medianBlur(grayMatrix, medianBlur, 5);
405
        Mat circles = new Mat();
406
        Imgproc.HoughCircles(medianBlur, circles, Imgproc.HOUGH_GRADIENT, 1, 15, 50, 20, 17, 25);
407
        return circles;
408
    }
30209 amit.gupta 409
 
34413 amit.gupta 410
    private double[] getMatCircles2(WebDriver driver, String fileName) throws Exception {
411
        File screenshot = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
412
        BufferedImage fullImg = ImageIO.read(screenshot);
413
 
414
        // Get the location of element on the page
36583 amit 415
        WebElement imageElement = driver.findElement(By.xpath("//*[starts-with(@id, 'dx_captcha_basic_bg_')]"));
34413 amit.gupta 416
        Point point = imageElement.getLocation();
417
 
418
        // Get width and height of the element
419
        int eleWidth = imageElement.getSize().getWidth();
420
        int eleHeight = imageElement.getSize().getHeight();
421
 
422
        // Crop the entire page screenshot to get only element screenshot
423
        BufferedImage eleScreenshot = fullImg.getSubimage(point.getX(), point.getY(),
424
                eleWidth, eleHeight);
425
        ImageIO.write(eleScreenshot, "png", screenshot);
426
 
427
        // Copy the element screenshot to disk
428
        File screenshotLocation = new File(fileName);
429
        FileUtils.copyFile(screenshot, screenshotLocation);
430
 
431
        Mat src = Imgcodecs.imread(fileName);
432
        if (src.empty()) {
36583 amit 433
            LOGGER.warn("Cannot read image: {}", fileName);
36253 amit 434
            new File(fileName).delete();
34413 amit.gupta 435
            return null;
436
        }
437
 
438
        Mat gray = new Mat();
439
        Imgproc.cvtColor(src, gray, Imgproc.COLOR_BGR2GRAY);
440
        Imgproc.GaussianBlur(gray, gray, new Size(9, 9), 2, 2);
441
 
442
        Mat circles = new Mat();
443
        Imgproc.HoughCircles(gray, circles, Imgproc.HOUGH_GRADIENT, 1.0,
444
                20, // min distance between centers
445
                100, 20, // param1 (Canny high threshold), param2 (accumulator threshold)
446
                10, 50); // minRadius, maxRadius (adjust as needed)
447
 
36253 amit 448
        if (circles.cols() < 2) {
449
            new File(fileName).delete();
450
            return null;
451
        }
34413 amit.gupta 452
 
453
        for (int i = 0; i < circles.cols(); i++) {
454
            double[] c1 = circles.get(0, i);
455
            for (int j = i + 1; j < circles.cols(); j++) {
456
                double[] c2 = circles.get(0, j);
457
                if (Math.abs(c1[2] - c2[2]) < 3) { // check similar radius
36253 amit 458
                    new File(fileName).delete();
34413 amit.gupta 459
                    return new double[] {
460
                            c1[0], c2[0] // x-coordinates
461
                    };
462
                }
463
            }
464
        }
465
 
36253 amit 466
        new File(fileName).delete();
34413 amit.gupta 467
        return null;
468
    }
469
 
470
 
30209 amit.gupta 471
}