barcode-reader-javascript-samples/scenarios/scan-and-search/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" />
  <title>Scan & Search</title>
  <link rel="stylesheet" href="./index.css">
  <!-- Include Dynamsoft Barcode Reader Bundle via CDN -->
  <script src="https://cdn.jsdelivr.net/npm/dynamsoft-barcode-reader-bundle@11.4.3000/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> -->
</head>

<body>
  <h1>📦 Instant Product Information Lookup</h1>
  <h2>Scan or enter a barcode to search for product data</h2>

  <!-- Always-visible camera view -->
  <div id="barcode-scanner-view">
    <!-- Transparent overlay covering the full view; center click toggles play/pause -->
    <div id="camera-toggle-area" class="loading" aria-hidden="true">
      <div id="loading-spinner"></div>
      <div id="play-pause-icon" role="button" tabindex="0" aria-label="Toggle scanning"></div>
    </div>
  </div>

  <!-- Filter toggle -->
  <div id="filter-row">
    <button id="filter-toggle-btn" aria-expanded="false" aria-controls="filters-panel">
      <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor" aria-hidden="true">
        <path d="M1 2h14l-5 6v5l-4-2V8L1 2z"/>
      </svg>
      Filters
      <span id="filter-badge" hidden aria-label="Filters active">●</span>
    </button>
  </div>

  <!-- Collapsible filter panel -->
  <div id="filters-panel" hidden aria-label="Scan filters">

    <!-- 1. Barcode format -->
    <section class="filter-section">
      <h3 class="filter-section-title">Barcode Format</h3>
      <div class="preset-group" role="group" aria-label="Format preset">
        <button class="preset-btn active" data-preset="all">All</button>
        <button class="preset-btn" data-preset="retail">1D Retail</button>
        <button class="preset-btn" data-preset="industrial">1D Industrial</button>
        <button class="preset-btn" data-preset="2d">2D Codes</button>
        <button class="preset-btn" data-preset="custom">Custom</button>
      </div>
      <div id="custom-formats-wrapper" hidden>
        <div id="custom-formats-grid"></div>
      </div>
    </section>

    <!-- 2. String length -->
    <section class="filter-section">
      <h3 class="filter-section-title">String Length</h3>
      <div class="length-inputs">
        <label class="length-label">
          Min
          <input type="number" id="min-length" min="0" placeholder="Any" />
        </label>
        <span class="length-dash">–</span>
        <label class="length-label">
          Max
          <input type="number" id="max-length" min="0" placeholder="Any" />
        </label>
        <span class="length-unit">chars</span>
      </div>
    </section>

    <!-- 3. Keyword rules -->
    <section class="filter-section">
      <h3 class="filter-section-title">Keyword Rules <span class="filter-hint">(all must match)</span></h3>
      <div id="keyword-rules-list" aria-label="Keyword rules"></div>
      <button id="add-rule-btn" class="add-rule-btn">+ Add Rule</button>
    </section>

  </div>

  <!-- Input bar + search button -->
  <div id="container">
    <input type="text" id="text-input" placeholder="e.g. 049000042511" />
    <button id="search-btn" aria-label="Search">
      <div class="search-icon"></div>
    </button>
  </div>

  <textarea id="search-result" placeholder="Search Result..."></textarea>

  <script>
    // ── BF ID constants ────────────────────────────────────────────────────────
    const ALL_2D_BF = ['BF_PDF417', 'BF_QR_CODE', 'BF_DATAMATRIX', 'BF_AZTEC', 'BF_MICRO_QR', 'BF_MICRO_PDF417', 'BF_DOTCODE'];
    const ALL_1D_BF = ['BF_EAN_13', 'BF_EAN_8', 'BF_UPC_A', 'BF_UPC_E', 'BF_CODE_128', 'BF_CODE_39', 'BF_CODE_93', 'BF_ITF', 'BF_CODABAR', 'BF_GS1_DATABAR'];

    // Display name → BF ID (1D only — 2D formats are not exposed in the filter UI)
    const FORMAT_TO_BF = {
      "EAN-13":    "BF_EAN_13",
      "EAN-8":     "BF_EAN_8",
      "UPC-A":     "BF_UPC_A",
      "UPC-E":     "BF_UPC_E",
      "Code 128":  "BF_CODE_128",
      "Code 39":   "BF_CODE_39",
      "Code 93":   "BF_CODE_93",
      "ITF":       "BF_ITF",
      "Codabar":   "BF_CODABAR",
      "QR Code":   "BF_QR_CODE",
      "PDF417":    "BF_PDF417",
      "DataMatrix":"BF_DATAMATRIX",
      "Aztec":     "BF_AZTEC",
    };

    // Preset → 1D BF ID array (written to BarcodeReaderTaskSettingOptions[0].BarcodeFormatIds)
    const PRESET_FORMAT_IDS = {
      all:        [...ALL_1D_BF, ...ALL_2D_BF],
      retail:     ['BF_EAN_13', 'BF_EAN_8', 'BF_UPC_A', 'BF_UPC_E'],
      industrial: ['BF_CODE_128', 'BF_CODE_39', 'BF_CODE_93', 'BF_ITF', 'BF_CODABAR'],
      "2d":       ALL_2D_BF,
    };

    const ALL_FORMATS = Object.keys(FORMAT_TO_BF);

    // ── Filter state ───────────────────────────────────────────────────────────
    let activePreset     = "all";
    let customSelectedBF = new Set(Object.values(FORMAT_TO_BF)); // all checked by default
    let keywordRules     = [];
    let ruleIdCounter    = 0;
    let scanner          = null;
    let isCapturing      = false;
    let isApplyingFilters = false;
    let filterApplyTimer = null;

    // ── DOM refs ───────────────────────────────────────────────────────────────
    const searchBtn            = document.getElementById("search-btn");
    const inputBox             = document.getElementById("text-input");
    const barcodeScannerView   = document.getElementById("barcode-scanner-view");
    const cameraToggleArea     = document.getElementById("camera-toggle-area");
    const playPauseIcon        = document.getElementById("play-pause-icon");
    const searchResult         = document.getElementById("search-result");
    const filterToggleBtn      = document.getElementById("filter-toggle-btn");
    const filtersPanel         = document.getElementById("filters-panel");
    const filterBadge          = document.getElementById("filter-badge");
    const customFormatsWrapper = document.getElementById("custom-formats-wrapper");
    const customFormatsGrid    = document.getElementById("custom-formats-grid");
    const minLengthInput       = document.getElementById("min-length");
    const maxLengthInput       = document.getElementById("max-length");
    const keywordRulesList     = document.getElementById("keyword-rules-list");
    const addRuleBtn           = document.getElementById("add-rule-btn");

    // ── SDK filter application ─────────────────────────────────────────────────
    function getActiveFormatIds() {
      if (activePreset !== "custom") {
        return PRESET_FORMAT_IDS[activePreset] ?? PRESET_FORMAT_IDS.all;
      }
      return [...ALL_1D_BF, ...ALL_2D_BF].filter(id => customSelectedBF.has(id));
    }

    function buildRegexPattern(rules) {
      const parts = [];
      for (const rule of rules) {
        const val = rule.value.trim();
        if (!val) continue;
        const esc = val.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
        switch (rule.type) {
          case "contains":     parts.push(`(?=.*${esc})`); break;
          case "not-contains": parts.push(`(?!.*${esc})`); break;
          case "starts-with":  parts.push(`(?=${esc})`); break;
          case "ends-with":    parts.push(`(?=.*${esc}$)`); break;
          case "regex":
            try { new RegExp(val); parts.push(`(?=${val})`); } catch {}
            break;
        }
      }
      return parts.length ? `^${parts.join("")}[\\s\\S]*$` : "";
    }

    async function applySDKFilters() {
      if (!scanner || isApplyingFilters) return;
      isApplyingFilters = true;
      try {
        const { cvRouter } = scanner;

        // 1. Stop capturing if active
        const wasCapturing = isCapturing;
        if (wasCapturing) {
          cvRouter.stopCapturing();
          isCapturing = false;
        }

        // 2. Get current settings for the template
        const tempSetting = await cvRouter.outputSettings("ReadSingleBarcode", true);

        // 3a. Format filter — BarcodeReaderTaskSettingOptions[0].BarcodeFormatIds
        tempSetting.BarcodeReaderTaskSettingOptions[0].BarcodeFormatIds = getActiveFormatIds();

        // 3b. String length filter — BarcodeFormatSpecificationOptions[0].BarcodeTextLengthRangeArray
        const minLen = minLengthInput.value !== "" ? parseInt(minLengthInput.value, 10) : null;
        const maxLen = maxLengthInput.value !== "" ? parseInt(maxLengthInput.value, 10) : null;
        const lengthRange = (minLen !== null || maxLen !== null)
          ? [{ MinValue: minLen ?? 0, MaxValue: maxLen ?? 999999 }]
          : [];
        tempSetting.BarcodeFormatSpecificationOptions[1].BarcodeTextLengthRangeArray = lengthRange;

        // 3c. Keyword / regex filter — BarcodeFormatSpecificationOptions[0].BarcodeTextRegExPattern
        const pattern = buildRegexPattern(keywordRules);
        tempSetting.BarcodeFormatSpecificationOptions[1].BarcodeTextRegExPattern = pattern;

        // 4. Apply updated settings
        await cvRouter.initSettings(tempSetting);

        // 5. Resume capturing if it was active before
        if (wasCapturing) {
          await cvRouter.startCapturing("ReadSingleBarcode");
          isCapturing = true;
        }
      } finally {
        isApplyingFilters = false;
      }
    }

    // Debounced wrapper — used by text inputs to avoid applying on every keystroke
    function scheduleFilterApply() {
      updateBadge();
      clearTimeout(filterApplyTimer);
      filterApplyTimer = setTimeout(() => {
        if (isCapturing) applySDKFilters();
      }, 400);
    }

    // Immediate wrapper — used by discrete controls (preset buttons, checkboxes)
    function onFilterChanged() {
      updateBadge();
      if (isCapturing) applySDKFilters();
    }

    // ── Build custom format checkboxes ─────────────────────────────────────────
    ALL_FORMATS.forEach(fmt => {
      const bfId = FORMAT_TO_BF[fmt];
      const label = document.createElement("label");
      label.className = "format-checkbox-label";

      const cb = document.createElement("input");
      cb.type = "checkbox";
      cb.checked = true;
      cb.addEventListener("change", () => {
        if (cb.checked) customSelectedBF.add(bfId);
        else            customSelectedBF.delete(bfId);
        onFilterChanged();
      });

      label.append(cb, fmt);
      customFormatsGrid.append(label);
    });

    // ── Preset buttons ─────────────────────────────────────────────────────────
    document.querySelectorAll(".preset-btn").forEach(btn => {
      btn.addEventListener("click", () => {
        document.querySelectorAll(".preset-btn").forEach(b => b.classList.remove("active"));
        btn.classList.add("active");
        activePreset = btn.dataset.preset;
        customFormatsWrapper.hidden = activePreset !== "custom";
        onFilterChanged();
      });
    });

    // ── Filter panel toggle ────────────────────────────────────────────────────
    filterToggleBtn.addEventListener("click", () => {
      const opening = filtersPanel.hidden;
      filtersPanel.hidden = !opening;
      filterToggleBtn.setAttribute("aria-expanded", String(opening));
      filterToggleBtn.classList.toggle("open", opening);
    });

    // ── Length inputs ──────────────────────────────────────────────────────────
    minLengthInput.addEventListener("input", scheduleFilterApply);
    maxLengthInput.addEventListener("input", scheduleFilterApply);

    // ── Keyword rules ──────────────────────────────────────────────────────────
    function addKeywordRule(type = "contains", value = "") {
      const rule = { id: ruleIdCounter++, type, value };
      keywordRules.push(rule);
      renderKeywordRule(rule);
      updateBadge();
    }

    function removeKeywordRule(ruleId) {
      keywordRules = keywordRules.filter(r => r.id !== ruleId);
      document.getElementById(`rule-${ruleId}`)?.remove();
      onFilterChanged();
    }

    function renderKeywordRule(rule) {
      const row = document.createElement("div");
      row.className = "rule-row";
      row.id = `rule-${rule.id}`;

      const typeSelect = document.createElement("select");
      typeSelect.className = "rule-type-select";
      typeSelect.setAttribute("aria-label", "Rule type");
      [
        ["contains",     "contains"],
        ["not-contains", "does not contain"],
        ["starts-with",  "starts with"],
        ["ends-with",    "ends with"],
        ["regex",        "matches regex"],
      ].forEach(([val, label]) => {
        const opt = new Option(label, val);
        opt.selected = val === rule.type;
        typeSelect.add(opt);
      });
      typeSelect.addEventListener("change", () => {
        rule.type = typeSelect.value;
        onFilterChanged();
      });

      const valueInput = document.createElement("input");
      valueInput.type = "text";
      valueInput.className = "rule-value-input";
      valueInput.placeholder = "e.g. SN-";
      valueInput.value = rule.value;
      valueInput.setAttribute("aria-label", "Rule value");
      valueInput.addEventListener("input", () => {
        rule.value = valueInput.value;
        scheduleFilterApply();
      });

      const removeBtn = document.createElement("button");
      removeBtn.className = "rule-remove-btn";
      removeBtn.textContent = "✕";
      removeBtn.setAttribute("aria-label", "Remove rule");
      removeBtn.addEventListener("click", () => removeKeywordRule(rule.id));

      row.append(typeSelect, valueInput, removeBtn);
      keywordRulesList.append(row);
    }

    addRuleBtn.addEventListener("click", () => addKeywordRule());

    // ── Active filter badge ────────────────────────────────────────────────────
    function hasActiveFilters() {
      if (activePreset !== "all") return true;
      if (minLengthInput.value || maxLengthInput.value) return true;
      if (keywordRules.some(r => r.value.trim())) return true;
      return false;
    }

    function updateBadge() {
      filterBadge.hidden = !hasActiveFilters();
    }

    // ── Play / pause toggle UI ─────────────────────────────────────────────────
    function updateToggleUI() {
      cameraToggleArea.classList.remove("loading", "paused");
      if (!isCapturing) cameraToggleArea.classList.add("paused");
        cameraToggleArea.setAttribute("aria-label", isCapturing ? "Pause scanning" : "Resume scanning");
    }

    async function toggleCapturing() {
      if (!scanner || cameraToggleArea.classList.contains("loading")) return;
      if (isCapturing) {
        scanner.cvRouter.stopCapturing();
        scanner.cameraEnhancer.pause();
        isCapturing = false;
      } else {
        await applySDKFilters();
        await scanner.cameraEnhancer.resume();
        await scanner.cvRouter.startCapturing("ReadSingleBarcode");
        isCapturing = true;
      }
      updateToggleUI();
    }

    // ── Placeholder lookup ─────────────────────────────────────────────────────
    function lookupBarcode(text, format) {
      const formatLine = format ? `Format: ${format}\n\n` : "";
      return `Barcode Text to Query from Database:\n\n${text}\n\n${formatLine}-------------------\n\nProduct name: xxx\n\nBrand: xxx\n\nCategory: xxx\n\nPrice: xxx\n\nDescription: xxx`;
    }

    // ── SDK initialisation ─────────────────────────────────────────────────────
    Dynamsoft.License.LicenseManager.initLicense("DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9");

    const pInit = (async () => {
      const cameraView     = await Dynamsoft.DCE.CameraView.createInstance();
      const cameraEnhancer = await Dynamsoft.DCE.CameraEnhancer.createInstance(cameraView);
      const cvRouter       = await Dynamsoft.CVR.CaptureVisionRouter.createInstance();

      cvRouter.setInput(cameraEnhancer);

      // Attach camera UI behind the toggle overlay
      barcodeScannerView.insertBefore(cameraView.getUIElement(), cameraToggleArea);

      // Deduplicate so the same barcode doesn't fire repeatedly between filter applies
      const dedupeFilter = new Dynamsoft.Utility.MultiFrameResultCrossFilter();
      dedupeFilter.enableResultCrossVerification("barcode", true);
      dedupeFilter.enableResultDeduplication("barcode", true);
      await cvRouter.addResultFilter(dedupeFilter);

      const resultReceiver = new Dynamsoft.CVR.CapturedResultReceiver();
      resultReceiver.onDecodedBarcodesReceived = (result) => {
        if (!result.barcodeResultItems.length) return;
        // SDK-level filters have already applied; accept the first result
        const item = result.barcodeResultItems[0];
        // Fill the input only; user clicks search to query
        inputBox.value = item.text;
        // Pause scanning after a successful read so the user can review the result
        cvRouter.stopCapturing();
        cameraEnhancer.pause();
        isCapturing = false;
        updateToggleUI();
      };
      await cvRouter.addResultReceiver(resultReceiver);

      scanner = { cameraView, cameraEnhancer, cvRouter };

      // Auto-open camera and start capturing on page load
      await cameraEnhancer.open();
      await applySDKFilters();
      await cvRouter.startCapturing("ReadSingleBarcode");
      isCapturing = true;
      updateToggleUI();

      return scanner;
    })();

    // ── Event listeners ────────────────────────────────────────────────────────
    playPauseIcon.addEventListener("click", toggleCapturing);
    playPauseIcon.addEventListener("keydown", e => {
      if (e.key === "Enter" || e.key === " ") { e.preventDefault(); toggleCapturing(); }
    });

    searchBtn.addEventListener("click", () => {
      const text = inputBox.value.trim();
      if (!text) return;
      searchResult.value = lookupBarcode(text);
    });
  </script>
</body>

</html>