Add endpoint for printing labels

InvenTree/InvenTree/urls.py

@@ -92,6 +92,7 @@ settings_urls = [
 
 # Some javascript files are served 'dynamically', allowing them to pass through the Django translation layer
 dynamic_javascript_urls = [
+    url(r'^modals.js', DynamicJsView.as_view(template_name='js/modals.js'), name='modals.js'),
     url(r'^barcode.js', DynamicJsView.as_view(template_name='js/barcode.js'), name='barcode.js'),
     url(r'^bom.js', DynamicJsView.as_view(template_name='js/bom.js'), name='bom.js'),
     url(r'^build.js', DynamicJsView.as_view(template_name='js/build.js'), name='build.js'),
@@ -99,6 +100,7 @@ dynamic_javascript_urls = [
     url(r'^company.js', DynamicJsView.as_view(template_name='js/company.js'), name='company.js'),
     url(r'^order.js', DynamicJsView.as_view(template_name='js/order.js'), name='order.js'),
     url(r'^part.js', DynamicJsView.as_view(template_name='js/part.js'), name='part.js'),
+    url(r'^label.js', DynamicJsView.as_view(template_name='js/label.js'), name='label.js'),
     url(r'^stock.js', DynamicJsView.as_view(template_name='js/stock.js'), name='stock.js'),
     url(r'^table_filters.js', DynamicJsView.as_view(template_name='js/table_filters.js'), name='table_filters.js'),
 ]

InvenTree/label/api.py

@@ -1,11 +1,15 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+import sys
+
+from django.utils.translation import ugettext as _
 from django.conf.urls import url, include
 
 from django_filters.rest_framework import DjangoFilterBackend
 
 from rest_framework import generics, filters
+from rest_framework.response import Response
 
 import InvenTree.helpers
 
@@ -35,21 +39,11 @@ class LabelListView(generics.ListAPIView):
     ]
 
 
-class StockItemLabelList(LabelListView):
+class StockItemLabelMixin:
     """
-    API endpoint for viewing list of StockItemLabel objects.
-
-    Filterable by:
-
-    - enabled: Filter by enabled / disabled status
-    - item: Filter by single stock item
-    - items: Filter by list of stock items
-
+    Mixin for extracting stock items from query params
     """
 
-    queryset = StockItemLabel.objects.all()
-    serializer_class = StockItemLabelSerializer
-
     def get_items(self):
         """
         Return a list of requested stock items
@@ -59,8 +53,8 @@ class StockItemLabelList(LabelListView):
 
         params = self.request.query_params
 
-        if 'items' in params:
-            items = params.getlist('items', [])
+        if 'items[]' in params:
+            items = params.getlist('items[]', [])
         elif 'item' in params:
             items = [params.get('item', None)]
 
@@ -80,6 +74,22 @@ class StockItemLabelList(LabelListView):
 
         return valid_items
 
+
+class StockItemLabelList(LabelListView, StockItemLabelMixin):
+    """
+    API endpoint for viewing list of StockItemLabel objects.
+
+    Filterable by:
+
+    - enabled: Filter by enabled / disabled status
+    - item: Filter by single stock item
+    - items: Filter by list of stock items
+
+    """
+
+    queryset = StockItemLabel.objects.all()
+    serializer_class = StockItemLabelSerializer
+
     def filter_queryset(self, queryset):
         """
         Filter the StockItem label queryset.
@@ -140,6 +150,47 @@ class StockItemLabelDetail(generics.RetrieveUpdateDestroyAPIView):
     serializer_class = StockItemLabelSerializer
 
 
+class StockItemLabelPrint(generics.RetrieveAPIView, StockItemLabelMixin):
+    """
+    API endpoint for printing a StockItemLabel object
+    """
+
+    queryset = StockItemLabel.objects.all()
+    serializer_class = StockItemLabelSerializer
+
+    def get(self, request, *args, **kwargs):
+        """
+        Check if valid stock item(s) have been provided.
+        """
+
+        items = self.get_items()
+
+        if len(items) == 0:
+            # No valid items provided, return an error message
+            data = {
+                'error': _('Must provide valid StockItem(s)'),
+            }
+
+            return Response(data, status=400)
+
+        label = self.get_object()
+
+        try:
+            pdf = label.render(items)
+        except:
+
+            e = sys.exc_info()[1]
+            
+            data = {
+                'error': _('Error during label printing'),
+                'message': str(e),
+            }
+
+            return Response(data, status=400)
+
+        return InvenTree.helpers.DownloadFile(pdf.getbuffer(), 'stock_item_labels.pdf', content_type='application/pdf')
+
+
 class StockLocationLabelList(LabelListView):
     """
     API endpoint for viewiing list of StockLocationLabel objects.
@@ -163,7 +214,7 @@ class StockLocationLabelList(LabelListView):
 
         params = self.request.query_params
 
-        if 'locations' in params:
+        if 'locations[]' in params:
             locations = params.getlist('locations', [])
         elif 'location' in params:
             locations = [params.get('location', None)]
@@ -175,7 +226,7 @@ class StockLocationLabelList(LabelListView):
 
         for loc in locations:
             try:
-                valid_ids.append(int(item))
+                valid_ids.append(int(loc))
             except (ValueError):
                 pass
 
@@ -249,6 +300,7 @@ label_api_urls = [
     url(r'stock/', include([
         # Detail views
         url(r'^(?P<pk>\d+)/', include([
+            url(r'print/?', StockItemLabelPrint.as_view(), name='api-stockitem-label-print'),
             url(r'^.*$', StockItemLabelDetail.as_view(), name='api-stockitem-label-detail'),
         ])),
 

InvenTree/templates/base.html

@@ -112,7 +112,6 @@ InvenTree
 <script type='text/javascript' src="{% static 'script/inventree/api.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/inventree/filters.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/inventree/tables.js' %}"></script>
-<script type='text/javascript' src="{% static 'script/inventree/modals.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/inventree/notification.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/inventree/sidenav.js' %}"></script>
 
@@ -120,6 +119,8 @@ InvenTree
 <script type='text/javascript' src="{% url 'bom.js' %}"></script>
 <script type='text/javascript' src="{% url 'company.js' %}"></script>
 <script type='text/javascript' src="{% url 'part.js' %}"></script>
+<script type='text/javascript' src="{% url 'modals.js' %}"></script>
+<script type='text/javascript' src="{% url 'label.js' %}"></script>
 <script type='text/javascript' src="{% url 'stock.js' %}"></script>
 <script type='text/javascript' src="{% url 'build.js' %}"></script>
 <script type='text/javascript' src="{% url 'order.js' %}"></script>

InvenTree/templates/js/label.js

@@ -0,0 +1,52 @@
+{% load i18n %}
+
+function selectLabel(labels, options={}) {
+    /**
+     * Present the user with the available labels,
+     * and allow them to select which label to print.
+     * 
+     * The intent is that the available labels have been requested
+     * (via AJAX) from the server.
+     */
+
+    var modal = options.modal || '#modal-form';
+
+    var label_list = makeOptionsList(
+        labels,
+        function(item) {
+            var text = item.name;
+
+            if (item.description) {
+                text += ` - ${item.description}`;
+            }
+            
+            return text;
+        },
+        function(item) {
+            return item.pk;
+        }
+    );
+
+    // Construct form
+    var html = `
+    <form method='post' action='' class='js-modal-form' enctype='multipart/form-data'>
+        <div class='form-group'>
+            <label class='control-label requiredField' for='id_label'>
+            {% trans "Select Label" %}
+            </label>
+            <div class='controls'>
+                <select id='id_label' class='select form-control name='label'>
+                    ${label_list}
+                </select>
+            </div>
+        </div>
+    </form>`;
+
+    openModal({
+        modal: modal,
+    });
+    
+    modalEnable(modal, true);
+    modalSetTitle(modal, '{% trans "Select Label Template" %}');
+    modalSetContent(modal, html);
+}

InvenTree/templates/js/modals.js

@@ -1,3 +1,5 @@
+{% load i18n %}
+
 function makeOption(text, value, title) {
     /* Format an option for a select element
      */
@@ -392,7 +394,7 @@ function renderErrorMessage(xhr) {
         <div class='panel panel-default'>
             <div class='panel panel-heading'>
                 <div class='panel-title'>
-                    <a data-toggle='collapse' href="#collapse-error-info">Show Error Information</a>
+                    <a data-toggle='collapse' href="#collapse-error-info">{% trans "Show Error Information" %}</a>
                 </div>
             </div>
             <div class='panel-collapse collapse' id='collapse-error-info'>
@@ -459,8 +461,8 @@ function showQuestionDialog(title, content, options={}) {
     modalSetTitle(modal, title);
     modalSetContent(modal, content);
 
-    var accept_text = options.accept_text || 'Accept';
-    var cancel_text = options.cancel_text || 'Cancel';
+    var accept_text = options.accept_text || '{% trans "Accept" %}';
+    var cancel_text = options.cancel_text || '{% trans "Cancel" %}';
 
     $(modal).find('#modal-form-cancel').html(cancel_text);
     $(modal).find('#modal-form-accept').html(accept_text);
@@ -524,7 +526,7 @@ function openModal(options) {
     if (options.title) {
         modalSetTitle(modal, options.title);
     } else {
-        modalSetTitle(modal, 'Loading Data...');
+        modalSetTitle(modal, '{% trans "Loading Data" %}...');
     }
 
     // Unless the content is explicitly set, display loading message
@@ -535,8 +537,8 @@ function openModal(options) {
     }
 
     // Default labels for 'Submit' and 'Close' buttons in the form
-    var submit_text = options.submit_text || 'Submit';
-    var close_text = options.close_text || 'Close';
+    var submit_text = options.submit_text || '{% trans "Submit" %}';
+    var close_text = options.close_text || '{% trans "Close" %}';
 
     modalSetButtonText(modal, submit_text, close_text);
 
@@ -745,7 +747,7 @@ function handleModalForm(url, options) {
                         }
                         else {
                             $(modal).modal('hide');
-                            showAlertDialog('Invalid response from server', 'Form data missing from server response');
+                            showAlertDialog('{% trans "Invalid response from server" %}', '{% trans "Form data missing from server response" %}');
                         }
                     }
                 }
@@ -758,7 +760,7 @@ function handleModalForm(url, options) {
                 // There was an error submitting form data via POST
                 
                 $(modal).modal('hide'); 
-                showAlertDialog('Error posting form data', renderErrorMessage(xhr));                
+                showAlertDialog('{% trans "Error posting form data" %}', renderErrorMessage(xhr));                
             },
             complete: function(xhr) {
                 //TODO
@@ -793,8 +795,8 @@ function launchModalForm(url, options = {}) {
     var modal = options.modal || '#modal-form';
 
     // Default labels for 'Submit' and 'Close' buttons in the form
-    var submit_text = options.submit_text || 'Submit';
-    var close_text = options.close_text || 'Close';
+    var submit_text = options.submit_text || '{% trans "Submit" %}';
+    var close_text = options.close_text || '{% trans "Close" %}';
 
     // Form the ajax request to retrieve the django form data
     ajax_data = {
@@ -842,7 +844,7 @@ function launchModalForm(url, options = {}) {
 
             } else {
                 $(modal).modal('hide');
-                showAlertDialog('Invalid server response', 'JSON response missing form data');
+                showAlertDialog('{% trans "Invalid server response" %}', '{% trans "JSON response missing form data" %}');
             }
         },
         error: function (xhr, ajaxOptions, thrownError) {
@@ -852,36 +854,36 @@ function launchModalForm(url, options = {}) {
             if (xhr.status == 0) {
                 // No response from the server
                 showAlertDialog(
-                    "No Response",
-                    "No response from the InvenTree server",
+                    '{% trans "No Response" %}',
+                    '{% trans "No response from the InvenTree server" %}',
                 );
             } else if (xhr.status == 400) {
                 showAlertDialog(
-                    "Error 400: Bad Request",
-                    "Server returned error code 400"
+                    '{% trans "Error 400: Bad Request" %}',
+                    '{% trans "Server returned error code 400" %}',
                 );
             } else if (xhr.status == 401) {
                 showAlertDialog(
-                    "Error 401: Not Authenticated",
-                    "Authentication credentials not supplied"
+                    '{% trans "Error 401: Not Authenticated" %}',
+                    '{% trans "Authentication credentials not supplied" %}',
                 );
             } else if (xhr.status == 403) {
                 showAlertDialog(
-                    "Error 403: Permission Denied",
-                    "You do not have the required permissions to access this function"
+                    '{% trans "Error 403: Permission Denied" %}',
+                    '{% trans "You do not have the required permissions to access this function" %}',
                 );
             } else if (xhr.status == 404) {
                 showAlertDialog(
-                    "Error 404: Resource Not Found",
-                    "The requested resource could not be located on the server"
+                    '{% trans "Error 404: Resource Not Found" %}',
+                    '{% trans "The requested resource could not be located on the server" %}',
                 );
             } else if (xhr.status == 408) {
                 showAlertDialog(
-                    "Error 408: Timeout",
-                    "Connection timeout while requesting data from server"
+                    '{% trans "Error 408: Timeout" %}',
+                    '{% trans "Connection timeout while requesting data from server" %}',
                 );
             } else {
-                showAlertDialog('Error requesting form data', renderErrorMessage(xhr));
+                showAlertDialog('{% trans "Error requesting form data" %}', renderErrorMessage(xhr));
             }
 
             console.log("Modal form error: " + xhr.status);

InvenTree/templates/js/stock.js

@@ -645,6 +645,39 @@ function loadStockTable(table, options) {
     }
 
     // Automatically link button callbacks
+    $('#multi-item-print-label').click(function() {
+        var selections = $('#stock-table').bootstrapTable('getSelections');
+
+        var items = [];
+
+        selections.forEach(function(item) {
+            items.push(item.pk);
+        });
+
+        // Request available labels from the server
+        inventreeGet(
+            '{% url "api-stockitem-label-list" %}',
+            {
+                enabled: true,
+                items: items,
+            },
+            {
+                success: function(response) {
+
+                    if (response.length == 0) {
+                        showAlertDialog(
+                            '{% trans "No Labels Found" %}',
+                            '{% trans "No labels found which match selected stock item(s)" %}',
+                        );
+                        return;
+                    }
+
+                    var label = selectLabel(response);
+                }
+            }
+        );
+    });
+
     $('#multi-item-stocktake').click(function() {
         stockAdjustment('count');
     });

InvenTree/templates/stock_table.html

@@ -17,6 +17,7 @@
             <div class="btn-group">
                 <button id='stock-options' class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">{% trans "Options" %}<span class="caret"></span></button>
                 <ul class="dropdown-menu">
+                    <li><a href='#' id='multi-item-print-label' title='{% trans "Print labels" %}'><span class='fas fa-tags'></span> {% trans "Print labels" %}</a></li>
                     {% if roles.stock.change %}
                     <li><a href="#" id='multi-item-add' title='{% trans "Add to selected stock items" %}'><span class='fas fa-plus-circle'></span> {% trans "Add stock" %}</a></li>
                     <li><a href="#" id='multi-item-remove' title='{% trans "Remove from selected stock items" %}'><span class='fas fa-minus-circle'></span> {% trans "Remove stock" %}</a></li>