move render() into shared spot

going to be used by error page handling code, once it exists

incorporealcms/lib.py

@@ -1,6 +1,11 @@
 """Miscellaneous helper functions and whatnot."""
+import logging
+
 import markdown
 from flask import current_app as app
+from flask import make_response, render_template, request
+
+logger = logging.getLogger(__name__)
 
 
 def get_meta_str(md, key):
@@ -19,3 +24,27 @@ def init_md():
     # extensions our app depends on, like the meta extension
     return markdown.Markdown(extensions=app.config['MARKDOWN_EXTENSIONS'] + ['meta'],
                              extension_configs=app.config['MARKDOWN_EXTENSION_CONFIGS'])
+
+
+def render(template_name_or_list, **context):
+    """Wrap Flask's render_template.
+
+    * Determine the proper site theme to use in the template and provide it.
+    """
+    PAGE_STYLES = {
+        'dark': 'css/dark.css',
+        'light': 'css/light.css',
+    }
+
+    selected_style = request.args.get('style', None)
+    if selected_style:
+        user_style = selected_style
+    else:
+        user_style = request.cookies.get('user-style')
+        logger.debug("user style cookie: %s", user_style)
+    context['user_style'] = PAGE_STYLES.get(user_style, PAGE_STYLES.get(app.config['DEFAULT_PAGE_STYLE']))
+
+    resp = make_response(render_template(template_name_or_list, **context))
+    if selected_style:
+        resp.set_cookie('user-style', selected_style)
+    return resp

incorporealcms/pages.py

@@ -9,7 +9,7 @@ from flask import current_app as app
 from flask import make_response, redirect, render_template, request
 from tzlocal import get_localzone
 
-from incorporealcms.lib import get_meta_str, init_md
+from incorporealcms.lib import get_meta_str, init_md, render
 
 logger = logging.getLogger(__name__)
 
@@ -54,30 +54,6 @@ def display_page(path):
                       mtime=mtime.strftime('%Y-%m-%d %H:%M:%S %Z'))
 
 
-def render(template_name_or_list, **context):
-    """Wrap Flask's render_template.
-
-    * Determine the proper site theme to use in the template and provide it.
-    """
-    PAGE_STYLES = {
-        'dark': 'css/dark.css',
-        'light': 'css/light.css',
-    }
-
-    selected_style = request.args.get('style', None)
-    if selected_style:
-        user_style = selected_style
-    else:
-        user_style = request.cookies.get('user-style')
-        logger.debug("user style cookie: %s", user_style)
-    context['user_style'] = PAGE_STYLES.get(user_style, PAGE_STYLES.get(app.config['DEFAULT_PAGE_STYLE']))
-
-    resp = make_response(render_template(template_name_or_list, **context))
-    if selected_style:
-        resp.set_cookie('user-style', selected_style)
-    return resp
-
-
 def request_path_to_instance_resource_path(path):
     """Turn a request URL path to the full page path.