feat(generic): Introduce SelectMergeOrEnrich view and route

This view provides a simple form to select an internal or external
entity to merge its values in the entity that is modified.

apis_core/generic/abc.py

@@ -46,6 +46,10 @@ def get_merge_url(self, other_id):
         ct = ContentType.objects.get_for_model(self)
         return reverse("apis_core:generic:merge", args=[ct, self.id, other_id])
 
+    def get_select_merge_or_enrich_url(self):
+        ct = ContentType.objects.get_for_model(self)
+        return reverse("apis_core:generic:selectmergeorenrich", args=[ct, self.id])
+
     def get_create_success_url(self):
         return self.get_absolute_url()
 

apis_core/generic/forms/__init__.py

@@ -88,6 +88,26 @@ def __init__(self, *args, **kwargs):
                     self.fields[field].widget.choices = self.fields[field].choices
 
 
+class GenericSelectMergeOrEnrichForm(forms.Form):
+    def __init__(self, *args, **kwargs):
+        if "instance" in kwargs:
+            instance = kwargs.pop("instance")
+        super().__init__(*args, **kwargs)
+        ct = ContentType.objects.get_for_model(instance)
+        self.fields["uri"] = forms.ModelChoiceField(
+            queryset=ct.model_class().objects.all()
+        )
+        uri = reverse("apis_core:generic:autocomplete", args=[ct])
+        attrs = {"data-html": True, "data-tags": 1}
+        self.fields["uri"].widget = autocomplete.ModelSelect2(uri, attrs=attrs)
+        self.fields["uri"].widget.choices = self.fields["uri"].choices
+        self.fields["uri"].label = "Select or paste URI"
+        self.helper = FormHelper()
+        self.helper.form_method = "GET"
+        self.helper.add_input(Submit("submit", "Submit"))
+        self.helper.form_action = instance.get_enrich_url()
+
+
 class GenericMergeWithForm(forms.Form):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)

apis_core/generic/templates/generic/generic_selectmergeorenrich.html

@@ -0,0 +1,13 @@
+{% extends basetemplate|default:"base.html" %}
+{% load crispy_forms_tags %}
+
+{% block content %}
+  <div class="container">
+    <div class="card">
+      <div class="card-header">
+        Select to merge into <a href="{{ object.get_absolute_url }}">{{ object }}</a>
+      </div>
+      <div class="card-body">{% crispy form form.helper %}</div>
+    </div>
+  </div>
+{% endblock content %}

apis_core/generic/urls.py

@@ -49,6 +49,11 @@ def to_url(self, value):
                 path("create", views.Create.as_view(), name="create"),
                 path("delete/<int:pk>", views.Delete.as_view(), name="delete"),
                 path("update/<int:pk>", views.Update.as_view(), name="update"),
+                path(
+                    "selectmergeorenrich/<int:pk>",
+                    views.SelectMergeOrEnrich.as_view(),
+                    name="selectmergeorenrich",
+                ),
                 path(
                     "merge/<int:pk>/<int:otherpk>",
                     views.MergeWith.as_view(),

apis_core/generic/views.py

@@ -32,6 +32,7 @@
     GenericImportForm,
     GenericMergeWithForm,
     GenericModelForm,
+    GenericSelectMergeOrEnrichForm,
 )
 from .helpers import (
     first_member_match,
@@ -359,6 +360,31 @@ def get_success_url(self):
         return self.object.get_absolute_url()
 
 
+class SelectMergeOrEnrich(GenericModelMixin, PermissionRequiredMixin, FormView):
+    """
+    This view provides a simple form that allows to select other entities (also from
+    external sources, if set up) and on form submit redirects to the Enrich view.
+    """
+
+    template_name = "generic/generic_selectmergeorenrich.html"
+    permission_action_required = "create"
+    form_class = GenericSelectMergeOrEnrichForm
+    template_name_suffix = "_selectmergeorenrich.html"
+
+    def get_object(self, *args, **kwargs):
+        return get_object_or_404(self.model, pk=self.kwargs.get("pk"))
+
+    def get_context_data(self, *args, **kwargs):
+        context = super().get_context_data(*args, **kwargs)
+        context["object"] = self.get_object()
+        return context
+
+    def get_form_kwargs(self, *args, **kwargs):
+        kwargs = super().get_form_kwargs(*args, **kwargs)
+        kwargs["instance"] = self.get_object()
+        return kwargs
+
+
 class MergeWith(GenericModelMixin, PermissionRequiredMixin, FormView):
     """
     Generic merge view.