wms-app/app/ics/sku_barcode_label.php

<?php
  require_once __DIR__ . '/../session.php';
  require '../config.php';
  if (!in_array($_SESSION['login_role'] ?? 'viewer', ['owner', 'admin', 'staff'], true)) {
    http_response_code(403);
    exit('Access denied.');
  }
  require '../include_header.php';
?>

<body>
  <?php require '../include_topbar.php'; ?>
  <?php require '../include_sidebar.php'; ?>

  <main id="content" class="content py-15">
    <div class="container-fluid">
      <div class="row mb-6">
        <div class="col-12 d-flex justify-content-between align-items-center">
          <div>
            <h1 class="fs-3 mb-1">SKU Barcode Labels</h1>
            <p class="mb-0 text-muted">Print or reprint product identity labels from the lot master list.</p>
          </div>
          <div class="d-flex gap-2">
            <button class="btn btn-success" data-min-role="staff" onclick="open_create_label_modal()">
              <i class="ti ti-plus me-1"></i>New Barcode
            </button>
            <button id="btn_print" class="btn btn-outline-success" data-min-role="staff" onclick="print_selected_label()" disabled>
              <i class="ti ti-printer me-1"></i>Print
            </button>
            <button id="btn_disable" class="btn btn-outline-danger" data-min-role="staff" onclick="disable_selected_label()" disabled>
              <i class="ti ti-ban me-1"></i>Disable
            </button>
          </div>
        </div>
      </div>

      <div class="row g-5">
        <div class="col-lg-7">
          <div class="card">
            <div class="card-body p-5">
              <div class="position-relative mb-4">
                <input type="search" id="search_lot" class="form-control ps-9"
                  placeholder="Search SKU, product, lot, expiry, or description...">
                <span class="position-absolute top-25 ms-4">
                  <i class="ti ti-search text-muted"></i>
                </span>
              </div>
              <div class="table-responsive table-scroll">
                <table class="table table-hover mb-0">
                  <thead class="table-light">
                    <tr>
                      <th>SKU</th>
                      <th>Product</th>
                      <th>Lot No</th>
                      <th>Expiry</th>
                      <th>Source</th>
                      <th class="text-end">Action</th>
                    </tr>
                  </thead>
                  <tbody id="lot_tbody">
                    <tr><td colspan="7" class="text-center text-muted py-4">Loading lots...</td></tr>
                  </tbody>
                </table>
              </div>
            </div>
          </div>
        </div>

        <div class="col-lg-5">
          <div class="card">
            <div class="card-body p-5">
              <div id="label_preview" class="border rounded p-4 text-center text-muted">
                Select a lot to preview its label.
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </main>

  <!-- Manage Labels Modal (view existing + add new) -->
  <div class="modal fade" id="skuLabelModal" tabindex="-1" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
      <div class="modal-content">
        <div class="modal-header">
          <div>
            <h5 class="modal-title mb-0">Barcode Labels</h5>
            <p class="text-muted small mb-0 mt-1" id="modal_lot_info"></p>
          </div>
          <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
        </div>
        <div class="modal-body">
          <input type="hidden" id="modal_lot_index">

          <p class="fw-semibold small text-uppercase text-muted mb-2">Existing Labels</p>
          <div id="existing_label_list" class="small text-muted mb-4">Loading...</div>

          <hr class="my-3">

          <p class="fw-semibold small text-uppercase text-muted mb-2">Add New Label</p>
          <div class="input-group">
            <input type="text" id="modal_serial_number" class="form-control" placeholder="Serial No"
              autocomplete="off">
            <button class="btn btn-primary" type="button" onclick="generate_label_from_modal()">
              <i class="ti ti-barcode me-1"></i>Generate
            </button>
          </div>
          <small class="text-muted">Enter a new serial to create a label, or enter an existing serial to reprint.</small>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-light" data-bs-dismiss="modal">Close</button>
        </div>
      </div>
    </div>
  </div>

  <!-- New Barcode Modal (free-form, lot need not exist yet) -->
  <div class="modal fade" id="createSkuLabelModal" tabindex="-1" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
      <div class="modal-content">
        <div class="modal-header">
          <h5 class="modal-title">New Barcode</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
        </div>
        <div class="modal-body">
          <div class="mb-3">
            <label class="form-label">SKU</label>
            <select id="create_sku" class="form-select" onchange="sync_create_product_name()"></select>
          </div>
          <div class="mb-3">
            <label class="form-label">Product</label>
            <input type="text" id="create_product_name" class="form-control" readonly>
          </div>
          <div class="mb-3">
            <label class="form-label">Lot No</label>
            <input type="text" id="create_lot_number" class="form-control" autocomplete="off">
          </div>
          <div class="mb-3">
            <label class="form-label">Serial No</label>
            <input type="text" id="create_serial_number" class="form-control" autocomplete="off">
          </div>
          <div class="alert alert-light border mb-0 small">
            Use this to prepare a label before the lot has been received into the system.
          </div>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-light" data-bs-dismiss="modal">Cancel</button>
          <button type="button" class="btn btn-primary" onclick="create_custom_label()">
            <i class="ti ti-barcode me-1"></i>Create & Preview
          </button>
        </div>
      </div>
    </div>
  </div>

  <?php require '../include_ending.php'; ?>
  <script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.6/dist/JsBarcode.all.min.js"></script>
  <script>
    var lots = [];
    var products = [];
    var active_labels = [];
    var selected_payload = '';
    var selected_label_data = null;
    var selected_lot_index = -1;
    var sku_label_modal = null;
    var create_label_modal = null;

    function escape_html(value) {
      return String(value ?? '').replace(/[&<>"']/g, function(char) {
        return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#039;' }[char];
      });
    }

    function refresh_header_buttons() {
      var has = !!selected_payload;
      $('#btn_print').prop('disabled', !has);
      $('#btn_disable').prop('disabled', !has);
    }

    function highlight_selected_row() {
      $('#lot_tbody tr').removeClass('table-active');
      if (selected_lot_index >= 0) {
        $('#lot_tbody tr[data-lot-index="' + selected_lot_index + '"]').addClass('table-active');
      }
    }

    function load_lots() {
      return ajax_request({
        url: server_url + 'ics/api/engine/sku_label_lots.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        onSuccess: function(res) {
          lots = res.output || [];
          render_lots();
          highlight_selected_row();
        }
      });
    }

    function load_products() {
      return ajax_request({
        url: server_url + 'ics/api/engine/sku_label_products.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        onSuccess: function(res) {
          products = res.output || [];
          var opts = '<option value="">Select SKU...</option>';
          products.forEach(function(item) {
            opts += `<option value="${escape_html(item.sku)}">${escape_html(item.sku)} - ${escape_html(item.product_name)}</option>`;
          });
          $('#create_sku').html(opts);
        }
      });
    }

    function selected_create_product() {
      var sku = $('#create_sku').val();
      return products.find(function(item) { return item.sku === sku; }) || {};
    }

    function sync_create_product_name() {
      var item = selected_create_product();
      $('#create_product_name').val(item.product_name || '');
    }

    function open_create_label_modal() {
      $('#create_sku').val('');
      $('#create_product_name').val('');
      $('#create_lot_number').val('');
      $('#create_serial_number').val('');
      create_label_modal.show();
    }

    function render_lots() {
      var keyword = $('#search_lot').val().toLowerCase();
      var rows = lots.filter(function(item) {
        if (!keyword) return true;
        return [
          item.product_sku,
          item.product_name,
          item.lot_number,
          item.expiry_date,
          item.description
        ].join(' ').toLowerCase().includes(keyword);
      });

      if (!rows.length) {
        $('#lot_tbody').html('<tr><td colspan="7" class="text-center text-muted py-4">No lots found.</td></tr>');
        return;
      }

      var body = '';
      rows.forEach(function(item) {
        var idx = lots.indexOf(item);
        var source = '<span class="badge bg-success">Lot master</span>';
        if (item.source === 'active_stock') {
          source = '<span class="badge bg-warning text-dark">Stock only</span>';
        }
        if (item.source === 'md_barcode') {
          source = '<span class="badge bg-info text-dark">Barcode only</span>';
        }

        body += `<tr data-lot-index="${idx}">
          <td class="fw-semibold">${escape_html(item.product_sku)}</td>
          <td>${escape_html(item.product_name)}</td>
          <td>${escape_html(item.lot_number)}</td>
          <td>${item.expiry_date ? escape_html(item.expiry_date) : '<span class="text-muted">—</span>'}</td>
          <td>${source}</td>
          <td class="text-end">
            <button class="btn btn-sm btn-outline-primary" onclick="open_label_modal(${idx})">
              <i class="ti ti-list me-1"></i>Labels
            </button>
          </td>
        </tr>`;
      });
      $('#lot_tbody').html(body);
    }

    function open_label_modal(index) {
      var item = lots[index];
      if (!item) return;

      $('#modal_lot_index').val(index);
      var info = escape_html(item.product_sku) + ' &middot; ' + escape_html(item.lot_number);
      if (item.expiry_date) info += ' &middot; Exp ' + escape_html(item.expiry_date);
      $('#modal_lot_info').html(info);
      $('#modal_serial_number').val('');
      $('#existing_label_list').html('Loading...');
      sku_label_modal.show();
      load_existing_labels(item);
      setTimeout(function() { $('#modal_serial_number').trigger('focus'); }, 300);
    }

    function load_existing_labels(item) {
      ajax_request({
        url: server_url + 'ics/api/engine/sku_barcode_label.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        data: {
          product_sku: item.product_sku,
          lot_number: item.lot_number
        },
        onSuccess: function(res) {
          active_labels = res.output || [];
          if (!active_labels.length) {
            $('#existing_label_list').html('<span class="text-muted">No labels prepared for this lot yet.</span>');
            return;
          }

          var html = '<div class="list-group list-group-flush">';
          active_labels.forEach(function(label, index) {
            var statusBadge = parseInt(label.status) === 1
              ? '<span class="badge bg-success ms-2">Active</span>'
              : '<span class="badge bg-danger ms-2">Disabled</span>';
            var actionButtons = parseInt(label.status) === 1
              ? `<button type="button" class="btn btn-sm btn-outline-primary" onclick="preview_existing_label(${index})">
                  <i class="ti ti-eye me-1"></i>Select
                </button>
                <button type="button" class="btn btn-sm btn-outline-danger" onclick="disable_existing_label(${index})">
                  <i class="ti ti-ban me-1"></i>Disable
                </button>`
              : `<button type="button" class="btn btn-sm btn-outline-success" onclick="reenable_existing_label(${index})">
                  <i class="ti ti-refresh me-1"></i>Re-enable
                </button>`;
            html += `<div class="list-group-item d-flex justify-content-between align-items-center px-0">
              <span class="small">${escape_html(label.serial_number)} ${statusBadge}</span>
              <div class="d-flex gap-2">${actionButtons}</div>
            </div>`;
          });
          html += '</div>';
          $('#existing_label_list').html(html);
        }
      });
    }

    function preview_label(data, lot_index) {
      selected_payload = data.barcode;
      selected_label_data = data;
      if (lot_index !== undefined) selected_lot_index = lot_index;
      $('#label_preview').html(`
        <div class="barcode-label mx-auto">
          <div class="fw-bold fs-5">${escape_html(data.product_sku)}</div>
          <div class="small text-muted">${escape_html(data.product_name)}</div>
          <svg id="barcode_svg"></svg>
          <div class="small">Lot: ${escape_html(data.lot_number)} &nbsp; Serial: ${escape_html(data.serial_number)}</div>
          <div class="small text-muted">${escape_html(data.barcode)}</div>
        </div>`);
      JsBarcode('#barcode_svg', data.barcode, { format: 'CODE128', width: 1.6, height: 70, displayValue: false });
      sku_label_modal.hide();
      refresh_header_buttons();
      highlight_selected_row();
    }

    function preview_existing_label(index) {
      var label = active_labels[index];
      if (!label) return;
      var lot_index = parseInt($('#modal_lot_index').val(), 10);
      preview_label(label, lot_index);
    }

    function clear_selected_label() {
      selected_payload = '';
      selected_label_data = null;
      selected_lot_index = -1;
      $('#label_preview').html('Select a lot to preview its label.');
      refresh_header_buttons();
      highlight_selected_row();
    }

    function disable_barcode_label(barcode, onDone) {
      bootbox.confirm({
        message: 'Disable this SKU barcode label? It will no longer be accepted by stock scans.',
        buttons: {
          confirm: { label: 'Disable', className: 'btn-danger' },
          cancel:  { label: 'Back',    className: 'btn-secondary' }
        },
        callback: function(result) {
          if (!result) return;
          ajax_request({
            url: server_url + 'ics/api/engine/sku_barcode_label.php',
            autoPrepare: true,
            checkRequired: 0,
            action: 'read',
            queueLock: false,
            data: { label_action: 'disable', barcode: barcode },
            onSuccess: function() {
              clear_selected_label();
              load_lots();
              onDone?.();
            }
          });
        }
      });
    }

    function disable_existing_label(index) {
      var label = active_labels[index];
      if (!label) return;
      disable_barcode_label(label.barcode, function() {
        var item = lots[parseInt($('#modal_lot_index').val(), 10)];
        if (item) load_existing_labels(item);
      });
    }

    function reenable_existing_label(index) {
      var label = active_labels[index];
      if (!label) return;
      ajax_request({
        url: server_url + 'ics/api/engine/sku_barcode_label.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        data: {
          label_action: 'create',
          allow_unlisted: 1,
          product_sku: label.product_sku,
          lot_number: label.lot_number,
          serial_number: label.serial_number
        },
        onSuccess: function() {
          var item = lots[parseInt($('#modal_lot_index').val(), 10)];
          if (item) load_existing_labels(item);
          load_lots();
        }
      });
    }

    function disable_selected_label() {
      disable_barcode_label(selected_payload);
    }

    function generate_label_from_modal() {
      var item = lots[parseInt($('#modal_lot_index').val(), 10)];
      var serial = $('#modal_serial_number').val().trim();
      if (!item || !serial) {
        bootbox.alert('Serial no is required.');
        return;
      }

      ajax_request({
        url: server_url + 'ics/api/engine/sku_barcode_label.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        data: {
          label_action: 'create',
          product_sku: item.product_sku,
          lot_number: item.lot_number,
          serial_number: serial
        },
        onSuccess: function(res) {
          var lot_index = parseInt($('#modal_lot_index').val(), 10);
          preview_label(res.output, lot_index);
          load_lots();
        }
      });
    }

    function create_custom_label() {
      var sku = $('#create_sku').val();
      var lot = $('#create_lot_number').val().trim();
      var serial = $('#create_serial_number').val().trim();

      if (!sku || !lot || !serial) {
        bootbox.alert('SKU, lot no, and serial no are required.');
        return;
      }

      ajax_request({
        url: server_url + 'ics/api/engine/sku_barcode_label.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        data: {
          label_action: 'create',
          allow_unlisted: 1,
          product_sku: sku,
          lot_number: lot,
          serial_number: serial
        },
        onSuccess: function(res) {
          selected_lot_index = -1;
          create_label_modal.hide();
          preview_label(res.output);
          load_lots();
        }
      });
    }

    function print_selected_label() {
      if (!selected_payload) return;
      ajax_request({
        url: server_url + 'ics/api/engine/sku_barcode_label.php',
        autoPrepare: true,
        checkRequired: 0,
        action: 'read',
        queueLock: false,
        data: { label_action: 'print', barcode: selected_payload },
        onSuccess: function() { window.print(); }
      });
    }

    $('#search_lot').on('input', render_lots);

    $(function() {
      sku_label_modal = new bootstrap.Modal(document.getElementById('skuLabelModal'));
      create_label_modal = new bootstrap.Modal(document.getElementById('createSkuLabelModal'));
      load_lots();
      load_products();
    });
  </script>
  <style>
    .barcode-label { max-width: 420px; background: #fff; color: #111; }
    .barcode-label svg { max-width: 100%; height: auto; }
    .table-scroll {
      max-height: calc(100vh - 320px);
      overflow-y: auto;
    }
    .table-scroll thead th {
      position: sticky;
      top: 0;
      z-index: 10;
      background: #f8f9fa !important;
      box-shadow: inset 0 -1px 0 #dee2e6;
    }
    @media print {
      body * { visibility: hidden; }
      #label_preview, #label_preview * { visibility: visible; }
      #label_preview { position: absolute; left: 0; top: 0; width: 100%; border: 0 !important; }
    }
  </style>
</body>
</html>