Add a simple CSV export

app/templates/projects/project.html

@@ -22,6 +22,11 @@ <h2>{% translate 'catalogs'|capfirst %}</h2>
   {% endfor %}
 </ul>
 
+<h2>{% translate 'Export' %}</h2>
+<p>
+  <a href="{% url 'projects:messages_csv' slug=project.slug %}">{% translate 'Export messages as CSV' %}</a>
+</p>
+
 <h2>{% translate 'users'|capfirst %}</h2>
 <p>
 {% for user in project.all_users %}<a href="mailto:{{ user.email }}">{{ user.get_full_name }}</a>{% if not forloop.last %}, {% endif %}{% endfor %}

projects/foreign.py

@@ -0,0 +1,65 @@
+from collections import defaultdict
+from itertools import chain
+
+
+def msg_key(entry):
+    return (entry.msgid, entry.msgid_plural, entry.msgctxt)
+
+
+def merge_catalogs(project):
+    """
+    Return a nested dictionary of the form:
+
+    ``messages[msg_key][language, domain] = entry``
+    """
+
+    messages = defaultdict(dict)
+
+    for catalog in project.catalogs.all():
+        for entry in catalog.po:
+            messages[msg_key(entry)][catalog.language_code, catalog.domain] = entry
+
+    return messages
+
+
+def messages_as_table(project):
+    merged = merge_catalogs(project)
+    language_domain_combinations = sorted(
+        set(chain.from_iterable(thing.keys() for thing in merged.values()))
+    )
+
+    header = [
+        "msgctxt",
+        "msgid",
+        "msgid_plural",
+        "comment",
+        "tcomment",
+        "flags",
+        *(
+            f"{language_code}:{domain}"
+            for language_code, domain in language_domain_combinations
+        ),
+    ]
+    data = []
+
+    for entries in merged.values():
+        any_entry = next(iter(entries.values()))
+
+        row = [
+            any_entry.msgctxt,
+            any_entry.msgid,
+            any_entry.msgid_plural,
+            any_entry.comment,
+            any_entry.tcomment,
+            ", ".join(any_entry.flags),
+        ]
+
+        for language_code_domain in language_domain_combinations:
+            if entry := entries.get(language_code_domain):
+                row.append(entry.msgstr)
+            else:
+                row.append("")
+
+        data.append(row)
+
+    return [header, *data]

projects/test_views.py

@@ -70,6 +70,9 @@ def test_project_access(self):
         r = su_client.get("/traduire.toml")
         self.assertContains(r, f'token = "{superuser.token}"')
 
+        r = su_client.get("/test/messages.csv")
+        self.assertContains(r, ",Continue,")
+
         r = u_client.get(p.get_absolute_url(), headers={"accept-language": "en"})
         self.assertEqual(r.status_code, 404)
 

projects/urls.py

@@ -23,4 +23,5 @@
         views.traduire_toml,
         name="traduire_toml",
     ),
+    path("<slug:slug>/messages.csv", views.messages_csv, name="messages_csv"),
 ]

projects/views.py

@@ -1,7 +1,10 @@
+import csv
+
 import polib
 from django import http
 from django.conf import settings
 from django.contrib.auth.decorators import login_required
+from django.http import HttpResponse
 from django.shortcuts import get_object_or_404, render
 from django.template.defaulttags import querystring
 from django.views.decorators.csrf import csrf_exempt
@@ -10,6 +13,7 @@
 from accounts.models import User
 from form_rendering import adapt_rendering
 from projects import translators
+from projects.foreign import messages_as_table
 from projects.forms import EntriesForm, FilterForm, SuggestForm
 from projects.models import Catalog, Event, Project
 
@@ -211,3 +215,13 @@ def traduire_toml(request):
         for project in Project.objects.for_user(request.user)
     )
     return http.HttpResponse(toml, content_type="text/plain; charset=utf-8")
+
+
+@login_required
+def messages_csv(request, slug):
+    project = get_object_or_404(Project.objects.for_user(request.user), slug=slug)
+
+    response = HttpResponse(content_type="text/csv")
+    csv.writer(response).writerows(messages_as_table(project))
+
+    return response