Refactor: Move TeX and PDF code to util functions.

ticdesk_org/util.py

+from io import BytesIO
 import logging
+import os
 
 from django.apps import apps
+from django.template.loader import get_template
+from latex import build_pdf
 
 TeckidsPerson = apps.get_model('ticdesk_account', 'TeckidsPerson')
 TeckidsGroup = apps.get_model('ticdesk_account', 'TeckidsGroup')
@@ -118,3 +122,19 @@ def get_relevant_groups(user):
             continue
 
     return relevant
+
+def render_latex(template_name, context):
+    # Get the template and render it
+    tpl = get_template(template_name)
+    latex_str = tpl.render(context).encode('utf-8')
+
+    return latex_str
+
+def tex_to_pdf(tex):
+    # Generate TEXINPUTS correctly
+    texinputs = settings.TEXINPUTS + [settings.MEDIA_ROOT, os.path.abspath(os.path.dirname(__file__)), '']
+
+    # Turn LaTeX string into file object
+    with BytesIO(latex_str) as latex_file:
+        # Build PDF
+        pdf = build_pdf(latex_file, texinputs=texinputs)

ticdesk_org/views.py

-from io import BytesIO
-import os
-
 from django.apps import apps
 from django.conf import settings
 from django.http import JsonResponse, HttpResponse
 from django.shortcuts import redirect, render
-from django.template.loader import get_template
 from django.urls import reverse
-from django.template.loader import get_template
 from django_tables2 import RequestConfig
-from latex import build_pdf
 
 from .tables import PersonTable
 from .util import filter_disallowed_persons, get_relevant_groups, may_see_group, may_see_person
@@ -105,18 +99,10 @@ def persons(request, group=None):
     elif format == 'geojson':
         return JsonResponse(geojson, safe=False)
     elif format == 'pdf' or format == 'tex':
-        # Get the template and render it
-        tpl = get_template('ticdesk_org/%s.tex' % template)
-        latex_str = tpl.render(context).encode('utf-8')
+        latex_str = render_latex('ticdesk_org/%s.tex' % template, context)
 
         if format == 'pdf':
-            # Generate TEXINPUTS correctly
-            texinputs = settings.TEXINPUTS + [settings.MEDIA_ROOT, os.path.abspath(os.path.dirname(__file__)), '']
-
-            # Turn LaTeX string into file object
-            with BytesIO(latex_str) as latex_file:
-                # Build PDF
-                pdf = build_pdf(latex_file, texinputs=texinputs)
+            pdf = tex_to_pdf(latex_str)
 
             # Write HTTP response
             res = HttpResponse(pdf.data, content_type='application/pdf')