barcode-reader-javascript-samples/scenarios/read-and-parse-GS1-AI/index.html at main · Dynamsoft/barcode-reader-javascript-samples · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1.0" />
  <meta name="description" content="Instantly Read GS1-AI barcodes and Parse It with Dynamsoft Barcode Reader." />
  <meta name="keywords" content="read GS1 AI barcode" />
  <link rel="canonical" href="https://demo.dynamsoft.com/Samples/DBR/JS/scenarios/read-and-parse-GS1-AI/scan-using-foundational-api/index.html" />
  <link rel="stylesheet" href="./index.css">
  <title>Dynamsoft Barcode Reader Sample - Read a GS1-AI</title>
</head>

<body>
  <span id="span-tip">Click the play button to activate the camera.</span>
  <h1>Read a GS1-AI</h1>
  <div id="message-container">
    <em class="message-icon"><svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" p-id="3665" width="32" height="32">
        <path d="M544 789.333333h105.173333a10.666667 10.666667 0 0 0 10.666667-10.666666v-0.362667l-3.232-94.304a32 32 0 0 1 14.293333-27.765333C750.933333 603.189333 800 513.792 800 416c0-159.061333-128.938667-288-288-288S224 256.938667 224 416c0 97.813333 49.098667 187.232 129.141333 240.266667a32 32 0 0 1 14.314667 25.578666l3.338667 97.184a10.666667 10.666667 0 0 0 10.666666 10.304H480V572.693333l-76.64-81.429333a32 32 0 0 1 46.613333-43.861333l63.36 67.328 72.693334-68.661334a32 32 0 0 1 43.946666 46.528L544 573.792V789.333333z m320-373.333333a351.530667 351.530667 0 0 1-142.826667 283.146667l2.634667 76.96A74.666667 74.666667 0 0 1 649.173333 853.333333h-267.733333a74.666667 74.666667 0 0 1-74.624-72.106666l-2.784-81.194667A351.541333 351.541333 0 0 1 160 416C160 221.6 317.6 64 512 64s352 157.6 352 352zM416 960a32 32 0 0 1 0-64h192a32 32 0 0 1 0 64H416z" p-id="3666" fill="#909399"></path>
      </svg>
    </em>
    <div class="message-content">
      <span>Can't get scanning result for a long time?</span>
      <p>
        Enable
        <span class="api_highlight">singleFrameMode</span> to capture high-definition images with your camera (mobile
        device) or upload a local image for better recognition.
        <a href="javascript:void(0)" id="toggle-scan-mode">Give it a try!</a>
      </p>
      <em class="close-button"><svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" p-id="4604" width="10" height="10">
          <path d="M512 456.310154L94.247385 38.557538a39.542154 39.542154 0 0 0-55.689847 0 39.266462 39.266462 0 0 0 0 55.689847L456.310154 512 38.557538 929.752615a39.542154 39.542154 0 0 0 0 55.689847 39.266462 39.266462 0 0 0 55.689847 0L512 567.689846l417.752615 417.752616c15.163077 15.163077 40.290462 15.36 55.689847 0a39.266462 39.266462 0 0 0 0-55.689847L567.689846 512 985.442462 94.247385a39.542154 39.542154 0 0 0 0-55.689847 39.266462 39.266462 0 0 0-55.689847 0L512 456.310154z" p-id="4605" fill="#c0c4cc"></path>
        </svg>
      </em>
    </div>
  </div>
  <div id="main-container">
    <svg id="svg-start" t="1742347975823" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="2701" width="50" height="50">
      <path d="M169.258667 904.533333V119.466667A102.4 102.4 0 0 1 333.098667 37.546667l523.349333 392.533333a102.4 102.4 0 0 1 0 163.84l-523.349333 392.533333A102.4 102.4 0 0 1 169.258667 904.533333z" p-id="2702"></path>
    </svg>
    <span id="loading">Loading...</span>
    <div id="camera-view-container"></div>
  </div>
  <div id="result-container">
    <div class="result-header">
      Results:
      <em class="close-button" class="message_box_closebtn"><svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" p-id="4604" width="16" height="16">
          <path d="M512 456.310154L94.247385 38.557538a39.542154 39.542154 0 0 0-55.689847 0 39.266462 39.266462 0 0 0 0 55.689847L456.310154 512 38.557538 929.752615a39.542154 39.542154 0 0 0 0 55.689847 39.266462 39.266462 0 0 0 55.689847 0L512 567.689846l417.752615 417.752616c15.163077 15.163077 40.290462 15.36 55.689847 0a39.266462 39.266462 0 0 0 0-55.689847L567.689846 512 985.442462 94.247385a39.542154 39.542154 0 0 0 0-55.689847 39.266462 39.266462 0 0 0-55.689847 0L512 456.310154z" p-id="4605" fill="#ffffff"></path>
        </svg>
      </em>
    </div>
    <div class="result-body"></div>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/dynamsoft-barcode-reader-bundle@11.4.2000/dist/dbr.bundle.js"></script>
  <!-- If the network is unstable or you prefer to self-host the SDK, uncomment the line below to load it locally -->
  <!-- <script src="../../../dist/dbr.bundle.js"></script> -->
  <script>
    /** LICENSE ALERT - README
     * To use the library, you need to first specify a license key using the API "initLicense()" as shown below.
     */
    Dynamsoft.License.LicenseManager.initLicense("DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9");

    /**
     * You can visit https://www.dynamsoft.com/customer/license/trialLicense?utm_source=samples&product=dbr&package=js to get your own trial license good for 30 days.
     * Note that if you downloaded this sample from Dynamsoft while logged in, the above license key may already be your own 30-day trial license.
     * For more information, see https://www.dynamsoft.com/barcode-reader/docs/web/programming/javascript/user-guide/index.html?ver=11.4.2000&cVer=true#specify-the-license&utm_source=samples or contact support@dynamsoft.com.
     * LICENSE ALERT - THE END
     */

    // Preload "BarcodeReader" module for reading barcodes. It will save time on the initial decoding by skipping the module loading.
    Dynamsoft.Core.CoreModule.loadWasm();
    Dynamsoft.DCP.CodeParserModule.loadSpec("GS1_AI");

    const svgStart = document.querySelector("#svg-start");
    const loading = document.querySelector("#loading");
    const openImageBtn = document.querySelector("#btn-open-image");
    const cameraViewContainer = document.querySelector("#camera-view-container");

    // Result HTML Elements
    const resultContainer = document.querySelector("#result-container");
    const resultBody = document.querySelector(".result-body");

    // Message Box HTML Elements
    const messageContainer = document.querySelector("#message-container");

    // timer for displaying MessageBox
    let messageDisplayTimer;
    let oriParseInfo = {};

    const init = async () => {
      const parser = await Dynamsoft.DCP.CodeParser.createInstance();

      // Create a `CameraEnhancer` instance for camera control and a `CameraView` instance for UI control.
      const cameraView = await Dynamsoft.DCE.CameraView.createInstance();
      const cameraEnhancer = await Dynamsoft.DCE.CameraEnhancer.createInstance(cameraView);
      cameraEnhancer.setResolution({ width: 1920, height: 1080 });
      cameraViewContainer.append(cameraView.getUIElement()); // Get default UI and append it to DOM.

      // Create a `CaptureVisionRouter` instance and set `CameraEnhancer` instance as its image source.
      const cvRouter = await Dynamsoft.CVR.CaptureVisionRouter.createInstance();

      await cvRouter.initSettings("./read_and_parse_gs1.json");

      cvRouter.setInput(cameraEnhancer);

      // Filter out unchecked and duplicate results.
      const filter = new Dynamsoft.Utility.MultiFrameResultCrossFilter();
      // Filter out duplicate barcodes within 3 seconds.
      filter.enableResultDeduplication("barcode", true);
      await cvRouter.addResultFilter(filter);

      // Define a callback for results.
      await cvRouter.addResultReceiver({
        // callback in every frame
        onCapturedResultReceived: (result) => {
          if (cameraEnhancer.singleFrameMode === "disabled") {
            return;
          }
          // Report no barcode in singleFrameMode
          if (!result.items.some((item) => item.type === Dynamsoft.Core.EnumCapturedResultItemType.CRIT_BARCODE)) {
            resultBody.innerText = "No GS1 Barcode Found!";
            resultContainer.style.display = "block";
            document.addEventListener("mousedown", clickToHide);
          }
        },
        onParsedResultsReceived: async (result) => {
          if (!result.parsedResultItems.length) return;
          Dynamsoft.DCE.Feedback.beep();
          messageContainer.style.display = "none";
          clearTimeout(messageDisplayTimer);
          const success = await extractResultAlert(result.parsedResultItems[0]);
          if (success) {
            cvRouter.stopCapturing(result);
          }
        }
      });

      return {
        parser,
        cameraView,
        cameraEnhancer,
        cvRouter,
      };
    };
    const pInit = init();

    // decode video from camera
    svgStart.addEventListener("click", async () => {
      document.querySelector("h1").style.display = "none";
      svgStart.style.display = "none";
      loading.style.display = "inline";
      await switchToVideo();
    });

    document.querySelector("#result-container .close-button").addEventListener("click", closeResultAlert);

    document.querySelector("#toggle-scan-mode").addEventListener("click", async () => {
      document.querySelector("#span-tip").innerHTML =
        "Click below to select a picture to read. <a href='javascript:void(0)' onclick='backToCameraMode()'>Back to camera mode</a>";

      await switchToSingleFrameMode();
      messageContainer.style.display = "none";
    });

    document.querySelector(".message-content .close-button").addEventListener("click", () => {
      messageContainer.style.display = "none";
    });

    async function backToCameraMode() {
      closeResultAlert();
      document.querySelector("#span-tip").innerText = "Aim at the GS1 barcode.";

      await switchToVideo();
    }

    async function switchToSingleFrameMode() {
      const { cameraEnhancer, cvRouter, cameraView } = await pInit;
      cvRouter.stopCapturing();
      cameraEnhancer.close();
      cameraEnhancer.singleFrameMode = "image";
      await cameraEnhancer.open();
      cameraView.setScanLaserVisible(true);
      await cvRouter.startCapturing("ReadGS1AI");
    }

    async function switchToVideo() {
      document.querySelector("#main-container").style.display = "block";
      document.querySelector("#span-tip").innerText = "Aim at the GS1 barcode.";
      document.querySelector("#span-tip").hidden = false;
      cameraViewContainer.style.display = "block";

      const { cameraEnhancer, cvRouter, cameraView } = await pInit;
      loading.style.display = "none";
      cvRouter.stopCapturing();
      cameraEnhancer.close();
      cameraEnhancer.singleFrameMode = "disabled";
      await cameraEnhancer.open();
      cameraView.setScanLaserVisible(true);
      await cvRouter.startCapturing("ReadGS1AI");

      messageDisplayTimer = setTimeout(() => {
        if (cameraEnhancer.singleFrameMode === "disabled") {
          messageContainer.style.display = "flex";
        }
      }, 3000);
    }

    async function extractResultAlert(result) {
      function createNode(type, txt) {
        let node = document.createElement(type);
        if (txt) node.innerText = txt;
        return node;
      }

      try {
        console.log(result);
        parsedDLInfo = JSON.parse(result.jsonString);
        let resultShowNode = document.createElement("p");
        oriParseInfo = {};
        if (parsedDLInfo.CodeType === "GS1_AI") {
          for (let info of parsedDLInfo.ResultInfo) {
            if(info.FieldName && info.Value) {
              oriParseInfo[info.FieldName] = info.Value;
            }
            if (info.ChildFields) {
              wrapChildFields(info.ChildFields);
            }
          }
        }
        for (let o in oriParseInfo) {
          if (oriParseInfo[o]) {
            resultShowNode.appendChild(createNode("span", o));
            resultShowNode.appendChild(createNode("br"));
            resultShowNode.appendChild(createNode("strong", oriParseInfo[o]));
            resultShowNode.appendChild(createNode("br"));
            resultShowNode.appendChild(createNode("span", "------------------------------"));
            resultShowNode.appendChild(createNode("br"));
          }
        }
        resultBody.innerHTML = "";
        resultBody.appendChild(resultShowNode);
        resultContainer.style.display = "block";
        document.addEventListener("mousedown", clickToHide);
        return true;
      } catch (ex) {
        alert(ex.message);
        return false;
      }
    }

    function wrapChildFields(childFields) {
      for (let childField of childFields) {
        for (let field of childField) {
          oriParseInfo[field.FieldName] = field.Value;
          if (field.ChildFields) {
            wrapChildFields(field.ChildFields);
          }
        }
      }
    }

    function clickToHide(e) {
      if (e.target === document.body || e.target.id === "span-tip") {
        closeResultAlert();
        document.removeEventListener("click", arguments.callee);
      }
    }

    async function closeResultAlert() {
      resultContainer.style.display = "none";
      resultBody.innerText = "";
      const { cameraEnhancer, cvRouter } = await pInit;
      if (cameraEnhancer.singleFrameMode === "disabled") {
        messageDisplayTimer = setTimeout(() => {
          if (cameraEnhancer.singleFrameMode === "disabled") {
            messageContainer.style.display = "flex";
          }
        }, 3000);
      }
      await cvRouter.startCapturing("ReadGS1AI");
    }
  </script>
</body>

</html>