Add 'settings.js' which provides all settings (global and user) as a dynamic javascript file

- Minimal database hits required

InvenTree/InvenTree/urls.py

@@ -96,6 +96,7 @@ settings_urls = [
 # These javascript files are served "dynamically" - i.e. rendered on demand
 dynamic_javascript_urls = [
     url(r'^inventree.js', DynamicJsView.as_view(template_name='js/dynamic/inventree.js'), name='inventree.js'),
+    url(r'^settings.js', DynamicJsView.as_view(template_name='js/dynamic/settings.js'), name='settings.js'),
 ]
 
 # These javascript files are pased through the Django translation layer

InvenTree/common/models.py

@@ -38,6 +38,45 @@ class BaseInvenTreeSetting(models.Model):
     class Meta:
         abstract = True
 
+    @classmethod
+    def allValues(cls, user=None):
+        """
+        Return a dict of "all" defined global settings.
+
+        This performs a single database lookup,
+        and then any settings which are not *in* the database
+        are assigned their default values
+        """
+
+        keys = set()
+        settings = []
+
+        results = cls.objects.all()
+
+        if user is not None:
+            results = results.filter(user=user)
+
+        # Query the database
+        for setting in results:
+            settings.append({
+                "key": setting.key.upper(),
+                "value": setting.value
+            })
+
+            keys.add(setting.key.upper())
+
+        # Specify any "default" values which are not in the database
+        for key in cls.GLOBAL_SETTINGS.keys():
+
+            if key.upper() not in keys:
+
+                settings.append({
+                    "key": key.upper(),
+                    "value": cls.get_setting_default(key)
+                })
+        
+        return settings
+
     @classmethod
     def get_setting_name(cls, key):
         """
@@ -739,7 +778,6 @@ class InvenTreeSetting(BaseInvenTreeSetting):
         help_text=_('Settings key (must be unique - case insensitive'),
     )
 
-
 class InvenTreeUserSetting(BaseInvenTreeSetting):
     """
     An InvenTreeSetting object with a usercontext

InvenTree/part/templatetags/inventree_extras.py

@@ -207,6 +207,24 @@ def settings_value(key, *args, **kwargs):
     return InvenTreeSetting.get_setting(key)
 
 
+@register.simple_tag()
+def user_settings(user, *args, **kwargs):
+    """
+    Return all USER settings as a key:value dict
+    """
+
+    return InvenTreeUserSetting.allValues(user=user)
+
+
+@register.simple_tag()
+def global_settings(*args, **kwargs):
+    """
+    Return all GLOBAL InvenTree settings as a key:value dict
+    """
+
+    return InvenTreeSetting.allValues()
+
+
 @register.simple_tag()
 def get_color_theme_css(username):
     try:

InvenTree/templates/base.html

@@ -145,8 +145,11 @@
 <script type='text/javascript' src="{% static 'script/inventree/notification.js' %}"></script>
 <script type='text/javascript' src="{% static 'script/inventree/sidenav.js' %}"></script>
 
-<!-- translated -->
-<script type='text/javascript' src="{% i18n_static 'inventree.js' %}"></script>
+<!-- dynamic javascript templates -->
+<script type='text/javascript' src="{% url 'inventree.js' %}"></script>
+<script type='text/javascript' src="{% url 'settings.js' %}"></script>
+
+<!-- translated javascript templates-->
 <script type='text/javascript' src="{% i18n_static 'api.js' %}"></script>
 <script type='text/javascript' src="{% i18n_static 'attachment.js' %}"></script>
 <script type='text/javascript' src="{% i18n_static 'barcode.js' %}"></script>

InvenTree/templates/js/dynamic/settings.js

@@ -0,0 +1,17 @@
+{% load inventree_extras %}
+// InvenTree settings
+
+{% user_settings request.user as USER_SETTINGS %}
+{% global_settings as GLOBAL_SETTINGS %}
+
+var user_settings = {
+    {% for setting in USER_SETTINGS %}
+    {{ setting.key }}: {{ setting.value }},
+    {% endfor %}
+};
+
+var global_settings = {
+    {% for setting in GLOBAL_SETTINGS %}
+    {{ setting.key }}: {{ setting.value }},
+    {% endfor %}
+};