Merge pull request #1410 from SchrodingersGat/image-downloader

Image downloader

InvenTree/InvenTree/static/css/inventree.css

@@ -626,6 +626,53 @@
     z-index: 11000;
 }
 
+.modal-close {
+    position: absolute;
+    top: 15px;
+    right: 35px;
+    color: #f1f1f1;
+    font-size: 40px;
+    font-weight: bold;
+    transition: 0.25s;
+}
+
+.modal-close:hover,
+.modal-close:focus {
+    color: #bbb;
+    text-decoration: none;
+    cursor: pointer;
+}
+
+.modal-image-content {
+    margin: auto;
+    display: block;
+    width: 80%;
+    max-width: 700px;
+    text-align: center;
+    color: #ccc;
+    padding: 10px 0;
+}
+
+@media only screen and (max-width: 700px){
+    .modal-image-content {
+      width: 100%;
+    }
+}
+
+.modal-image {
+    display: none;
+    position: fixed;
+    z-index: 10000;
+    padding-top: 100px;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    overflow: auto;
+    background-color: rgb(0,0,0); /* Fallback color */
+    background-color: rgba(0,0,0,0.85); /* Black w/ opacity */
+}
+
 .js-modal-form .checkbox {
     margin-left: 0px;
 }

InvenTree/common/models.py

@@ -78,6 +78,13 @@ class InvenTreeSetting(models.Model):
             'choices': djmoney.settings.CURRENCY_CHOICES,
         },
 
+        'INVENTREE_DOWNLOAD_FROM_URL': {
+            'name': _('Download from URL'),
+            'description': _('Allow download of remote images and files from external URL'),
+            'validator': bool,
+            'default': False,
+        },
+
         'BARCODE_ENABLE': {
             'name': _('Barcode Support'),
             'description': _('Enable barcode scanner support'),

InvenTree/company/apps.py

@@ -7,6 +7,7 @@ from django.apps import AppConfig
 from django.db.utils import OperationalError, ProgrammingError
 from django.conf import settings
 
+from PIL import UnidentifiedImageError
 
 logger = logging.getLogger(__name__)
 
@@ -38,9 +39,11 @@ class CompanyConfig(AppConfig):
                         try:
                             company.image.render_variations(replace=False)
                         except FileNotFoundError:
-                            logger.warning("Image file missing")
+                            logger.warning(f"Image file '{company.image}' missing")
                             company.image = None
                             company.save()
+                        except UnidentifiedImageError:
+                            logger.warning(f"Image file '{company.image}' is invalid")
         except (OperationalError, ProgrammingError):
             # Getting here probably meant the database was in test mode
             pass

InvenTree/company/forms.py

@@ -66,6 +66,24 @@ class CompanyImageForm(HelperForm):
         ]
 
 
+class CompanyImageDownloadForm(HelperForm):
+    """
+    Form for downloading an image from a URL
+    """
+
+    url = django.forms.URLField(
+        label=_('URL'),
+        help_text=_('Image URL'),
+        required=True
+    )
+
+    class Meta:
+        model = Company
+        fields = [
+            'url',
+        ]
+
+
 class EditSupplierPartForm(HelperForm):
     """ Form for editing a SupplierPart object """
 

InvenTree/company/templates/company/company_base.html

@@ -2,19 +2,32 @@
 
 {% load static %}
 {% load i18n %}
+{% load inventree_extras %}
+
 
 {% block page_title %}
 InvenTree | {% trans "Company" %} - {{ company.name }}
 {% endblock %}
 
+
 {% block thumbnail %}
-<div class='dropzone' id='company-thumb'>
+{% settings_value "INVENTREE_DOWNLOAD_FROM_URL" as allow_download %}
-    <img class="part-thumb"
+
+<div class='dropzone part-thumb-container' id='company-thumb'>
+    <img class="part-thumb" id='company-image'
     {% if company.image %}
     src="{{ company.image.url }}"
     {% else %}
     src="{% static 'img/blank_image.png' %}"
     {% endif %}/>
+    <div class='btn-row part-thumb-overlay'>
+        <div class='btn-group'>
+            <button type='button' class='btn btn-default btn-glyph' title='{% trans "Upload new image" %}' id='company-image-upload'><span class='fas fa-file-upload'></span></button>
+            {% if allow_download %}
+            <button type='button' class='btn btn-default btn-glyph' title="{% trans 'Download image from URL' %}" id='company-image-url'><span class='fas fa-cloud-download-alt'></span></button>
+            {% endif %}
+        </div>
+    </div>
 </div>
 {% endblock %}
 
@@ -135,7 +148,13 @@ InvenTree | {% trans "Company" %} - {{ company.name }}
         }
     );
 
-    $("#company-thumb").click(function() {
+    {% if company.image %}
+    $('#company-image').click(function() {
+        showModalImage('{{ company.image.url }}');
+    });
+    {% endif %}
+
+    $("#company-image-upload").click(function() {
         launchModalForm(
             "{% url 'company-image' company.id %}",
             {
@@ -144,4 +163,17 @@ InvenTree | {% trans "Company" %} - {{ company.name }}
         );
     });
 
+    {% settings_value "INVENTREE_DOWNLOAD_FROM_URL" as allow_download %}
+
+    {% if allow_download %}
+    $('#company-image-url').click(function() {
+        launchModalForm(
+            '{% url "company-image-download" company.id %}',
+            {
+                reload: true,
+            }
+        )
+    });
+    {% endif %}
+
 {% endblock %}

InvenTree/company/urls.py

@@ -21,6 +21,7 @@ company_detail_urls = [
     url(r'^notes/', views.CompanyNotes.as_view(), name='company-notes'),
 
     url(r'^thumbnail/', views.CompanyImage.as_view(), name='company-image'),
+    url(r'^thumb-download/', views.CompanyImageDownloadFromURL.as_view(), name='company-image-download'),
 
     # Any other URL
     url(r'^.*$', views.CompanyDetail.as_view(), name='company-detail'),

InvenTree/company/views.py

@@ -11,9 +11,14 @@ from django.views.generic import DetailView, ListView, UpdateView
 
 from django.urls import reverse
 from django.forms import HiddenInput
+from django.core.files.base import ContentFile
 
 from moneyed import CURRENCIES
 
+from PIL import Image
+import requests
+import io
+
 from InvenTree.views import AjaxCreateView, AjaxUpdateView, AjaxDeleteView
 from InvenTree.helpers import str2bool
 from InvenTree.views import InvenTreeRoleMixin
@@ -28,6 +33,7 @@ from .forms import EditCompanyForm
 from .forms import CompanyImageForm
 from .forms import EditSupplierPartForm
 from .forms import EditPriceBreakForm
+from .forms import CompanyImageDownloadForm
 
 import common.models
 import common.settings
@@ -150,6 +156,84 @@ class CompanyDetail(DetailView):
         return ctx
 
 
+class CompanyImageDownloadFromURL(AjaxUpdateView):
+    """
+    View for downloading an image from a provided URL
+    """
+
+    model = Company
+    ajax_template_name = 'image_download.html'
+    form_class = CompanyImageDownloadForm
+    ajax_form_title = _('Download Image')
+
+    def validate(self, company, form):
+        """
+        Validate that the image data are correct
+        """
+        # First ensure that the normal validation routines pass
+        if not form.is_valid():
+            return
+
+        # We can now extract a valid URL from the form data
+        url = form.cleaned_data.get('url', None)
+
+        # Download the file
+        response = requests.get(url, stream=True)
+
+        # Look at response header, reject if too large
+        content_length = response.headers.get('Content-Length', '0')
+
+        try:
+            content_length = int(content_length)
+        except (ValueError):
+            # If we cannot extract meaningful length, just assume it's "small enough"
+            content_length = 0
+
+        # TODO: Factor this out into a configurable setting
+        MAX_IMG_LENGTH = 10 * 1024 * 1024
+
+        if content_length > MAX_IMG_LENGTH:
+            form.add_error('url', _('Image size exceeds maximum allowable size for download'))
+            return
+
+        self.response = response
+
+        # Check for valid response code
+        if not response.status_code == 200:
+            form.add_error('url', f"{_('Invalid response')}: {response.status_code}")
+            return
+
+        response.raw.decode_content = True
+
+        try:
+            self.image = Image.open(response.raw).convert()
+            self.image.verify()
+        except:
+            form.add_error('url', _("Supplied URL is not a valid image file"))
+            return
+
+    def save(self, company, form, **kwargs):
+        """
+        Save the downloaded image to the company
+        """
+        fmt = self.image.format
+
+        if not fmt:
+            fmt = 'PNG'
+
+        buffer = io.BytesIO()
+
+        self.image.save(buffer, format=fmt)
+
+        # Construct a simplified name for the image
+        filename = f"company_{company.pk}_image.{fmt.lower()}"
+
+        company.image.save(
+            filename,
+            ContentFile(buffer.getvalue()),
+        )
+
+
 class CompanyImage(AjaxUpdateView):
     """ View for uploading an image for the Company """
     model = Company

InvenTree/part/apps.py

@@ -7,6 +7,7 @@ from django.db.utils import OperationalError, ProgrammingError
 from django.apps import AppConfig
 from django.conf import settings
 
+from PIL import UnidentifiedImageError
 
 logger = logging.getLogger(__name__)
 
@@ -44,9 +45,11 @@ class PartConfig(AppConfig):
                         try:
                             part.image.render_variations(replace=False)
                         except FileNotFoundError:
-                            logger.warning("Image file missing")
+                            logger.warning(f"Image file '{part.image}' missing")
                             part.image = None
                             part.save()
+                        except UnidentifiedImageError:
+                            logger.warning(f"Image file '{part.image}' is invalid")
         except (OperationalError, ProgrammingError):
             # Exception if the database has not been migrated yet
             pass

InvenTree/part/forms.py

@@ -37,6 +37,24 @@ class PartModelChoiceField(forms.ModelChoiceField):
         return label
 
 
+class PartImageDownloadForm(HelperForm):
+    """
+    Form for downloading an image from a URL
+    """
+
+    url = forms.URLField(
+        label=_('URL'),
+        help_text=_('Image URL'),
+        required=True,
+    )
+
+    class Meta:
+        model = Part
+        fields = [
+            'url',
+        ]
+
+
 class PartImageForm(HelperForm):
     """ Form for uploading a Part image """
 

InvenTree/part/templates/part/part_base.html

@@ -206,6 +206,12 @@
         toggleId: '#part-menu-toggle',
     });
 
+    {% if part.image %}
+    $('#part-thumb').click(function() {
+        showModalImage('{{ part.image.url }}');
+    });
+    {% endif %}
+
     enableDragAndDrop(
         '#part-thumb',
         "{% url 'part-image-upload' part.id %}",
@@ -295,6 +301,20 @@
         });
     }
     
+    {% if roles.part.change %}
+    
+    {% settings_value "INVENTREE_DOWNLOAD_FROM_URL" as allow_download %}
+    {% if allow_download %}
+    $("#part-image-url").click(function() {
+        launchModalForm(
+            '{% url "part-image-download" part.id %}',
+            {
+                reload: true,
+            }
+        );
+    });
+    {% endif %}
+
     $("#part-image-select").click(function() {
         launchModalForm("{% url 'part-image-select' part.id %}",
                         {
@@ -303,7 +323,6 @@
                         });
     });
 
-    {% if roles.part.change %}
     $("#part-edit").click(function() {
         launchModalForm(
             "{% url 'part-edit' part.id %}",

InvenTree/part/templates/part/part_thumb.html

@@ -1,20 +1,28 @@
 {% load static %}
 {% load i18n %}
+{% load inventree_extras %}
+
+{% settings_value "INVENTREE_DOWNLOAD_FROM_URL" as allow_download %}
 
 <div class="media">
     <div class="media-left part-thumb-container">
       <div class='dropzone' id='part-thumb'>
-          <img class="part-thumb"
+          <img class="part-thumb" id='part-image'
               {% if part.image %}
               src="{{ part.image.url }}"
               {% else %}
               src="{% static 'img/blank_image.png' %}"
               {% endif %}/>
       </div>
+      {% if roles.part.change %}
       <div class='btn-row part-thumb-overlay'>
           <div class='btn-group'>
               <button type='button' class='btn btn-default btn-glyph' title="{% trans 'Select from existing images' %}" id='part-image-select'><span class='fas fa-th'></span></button>
-              <button type='button' class='btn btn-default btn-glyph' title="{% trans 'Upload new image' %}" id='part-image-upload'><span class='fas fa-file-image'></span></button>
+              <button type='button' class='btn btn-default btn-glyph' title="{% trans 'Upload new image' %}" id='part-image-upload'><span class='fas fa-file-upload'></span></button>
+              {% if allow_download %}
+              <button type='button' class='btn btn-default btn-glyph' title="{% trans 'Download image from URL' %}" id='part-image-url'><span class='fas fa-cloud-download-alt'></span></button>
+              {% endif %}
           </div>
       </div>
+      {% endif %}
     </div>

InvenTree/part/urls.py

@@ -75,6 +75,7 @@ part_detail_urls = [
     # Normal thumbnail with form
     url(r'^thumbnail/?', views.PartImageUpload.as_view(), name='part-image-upload'),
     url(r'^thumb-select/?', views.PartImageSelect.as_view(), name='part-image-select'),
+    url(r'^thumb-download/', views.PartImageDownloadFromURL.as_view(), name='part-image-download'),
 
     # Any other URLs go to the part detail page
     url(r'^.*$', views.PartDetail.as_view(), name='part-detail'),

InvenTree/part/views.py

@@ -5,6 +5,7 @@ Django views for interacting with Part app
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+from django.core.files.base import ContentFile
 from django.core.exceptions import ValidationError
 from django.db import transaction
 from django.db.utils import IntegrityError
@@ -19,7 +20,11 @@ from django.conf import settings
 
 from moneyed import CURRENCIES
 
+from PIL import Image
+
+import requests
 import os
+import io
 
 from rapidfuzz import fuzz
 from decimal import Decimal, InvalidOperation
@@ -831,6 +836,89 @@ class PartQRCode(QRCodeView):
             return None
 
 
+class PartImageDownloadFromURL(AjaxUpdateView):
+    """
+    View for downloading an image from a provided URL
+    """
+
+    model = Part
+
+    ajax_template_name = 'image_download.html'
+    form_class = part_forms.PartImageDownloadForm
+    ajax_form_title = _('Download Image')
+
+    def validate(self, part, form):
+        """
+        Validate that the image data are correct.
+
+        - Try to download the image!
+        """
+
+        # First ensure that the normal validation routines pass
+        if not form.is_valid():
+            return
+
+        # We can now extract a valid URL from the form data
+        url = form.cleaned_data.get('url', None)
+
+        # Download the file
+        response = requests.get(url, stream=True)
+
+        # Look at response header, reject if too large
+        content_length = response.headers.get('Content-Length', '0')
+
+        try:
+            content_length = int(content_length)
+        except (ValueError):
+            # If we cannot extract meaningful length, just assume it's "small enough"
+            content_length = 0
+
+        # TODO: Factor this out into a configurable setting
+        MAX_IMG_LENGTH = 10 * 1024 * 1024
+
+        if content_length > MAX_IMG_LENGTH:
+            form.add_error('url', _('Image size exceeds maximum allowable size for download'))
+            return
+
+        self.response = response
+
+        # Check for valid response code
+        if not response.status_code == 200:
+            form.add_error('url', f"{_('Invalid response')}: {response.status_code}")
+            return
+
+        response.raw.decode_content = True
+
+        try:
+            self.image = Image.open(response.raw).convert()
+            self.image.verify()
+        except:
+            form.add_error('url', _("Supplied URL is not a valid image file"))
+            return
+
+    def save(self, part, form, **kwargs):
+        """
+        Save the downloaded image to the part
+        """
+
+        fmt = self.image.format
+
+        if not fmt:
+            fmt = 'PNG'
+
+        buffer = io.BytesIO()
+
+        self.image.save(buffer, format=fmt)
+
+        # Construct a simplified name for the image
+        filename = f"part_{part.pk}_image.{fmt.lower()}"
+
+        part.image.save(
+            filename,
+            ContentFile(buffer.getvalue()),
+        )
+
+
 class PartImageUpload(AjaxUpdateView):
     """ View for uploading a new Part image """
 

InvenTree/templates/InvenTree/settings/global.html

@@ -19,6 +19,7 @@
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_BASE_URL" icon="fa-globe" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_COMPANY_NAME" icon="fa-building" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_DEFAULT_CURRENCY" icon="fa-dollar-sign" %}
+        {% include "InvenTree/settings/setting.html" with key="INVENTREE_DOWNLOAD_FROM_URL" icon="fa-cloud-download-alt" %}
     </tbody>
 </table>
 

InvenTree/templates/image_download.html

@@ -0,0 +1,16 @@
+{% extends "modal_form.html" %}
+
+{% load inventree_extras %}
+{% load i18n %}
+
+{% block pre_form_content %}
+<div class='alert alert-block alert-info'>
+    {% trans "Specify URL for downloading image" %}:
+
+    <ul>
+        <li>{% trans "Must be a valid image URL" %}</li>
+        <li>{% trans "Remote server must be accessible" %}</li>
+        <li>{% trans "Remote image must not exceed maximum allowable file size" %}</li>
+    </ul>
+</div>
+{% endblock %}

InvenTree/templates/js/modals.js

@@ -909,3 +909,42 @@ function launchModalForm(url, options = {}) {
     // Send the AJAX request
     $.ajax(ajax_data);
 }
+
+
+function hideModalImage() {
+
+    var modal = $('#modal-image-dialog');
+
+    modal.animate({
+        opacity: 0.0,
+    }, 250, function() {
+        modal.hide();
+    });
+
+}
+
+
+function showModalImage(image_url) {
+    // Display full-screen modal image
+
+    console.log('showing modal image: ' + image_url);
+
+    var modal = $('#modal-image-dialog');
+
+    // Set image content
+    $('#modal-image').attr('src', image_url);
+
+    modal.show();
+
+    modal.animate({
+        opacity: 1.0,
+    }, 250);
+
+    $('#modal-image-close').click(function() {
+        hideModalImage();
+    });
+
+    modal.click(function() {
+        hideModalImage();
+    });
+}

InvenTree/templates/modals.html

@@ -1,5 +1,12 @@
 {% load i18n %}
 
+<div class='modal fade modal-image' role='dialog' id='modal-image-dialog'>
+  <span class='modal-close' id='modal-image-close'>&times;</span>
+
+  <img class='modal-image-content' id='modal-image'>
+
+</div>
+
 <div class='modal fade modal-fixed-footer modal-primary' tabindex='-1' role='dialog' id='modal-form'>
     <div class='modal-dialog'>
         <div class='modal-content'>
@@ -78,8 +85,10 @@
               </button>
               <h3 id='modal-title'>Alert Information</h3>
             </div>
+            <div class='modal-form-content-wrapper'>
               <div class='modal-form-content'>
               </div>
+            </div>
             <div class='modal-footer'>
                 <button type='button' class='btn btn-default' data-dismiss='modal'>{% trans "Close" %}</button>
             </div>