Reorganized site and blog views and helpers to use LazyView

This increases the speed of the site by not requiring the site and blog code to
be imported on every request - just those that are relevant. It also splits the
code into modules which are easier to work with.

i2p2www/blog/helpers.py

@@ -0,0 +1,82 @@
+import codecs
+import datetime
+from docutils.core import publish_parts
+from flask import abort, g, safe_join, url_for
+import os
+import os.path
+
+from i2p2www import BLOG_DIR
+
+
+#####################
+# Blog helper methods
+
+def get_blog_feed_items(num=0):
+    entries = get_blog_entries(num)
+    items = []
+    for entry in entries:
+        parts = render_blog_entry(entry[0])
+        if parts:
+            a = {}
+            a['title'] = parts['title']
+            a['content'] = parts['fragment']
+            a['url'] = url_for('blog_entry', lang=g.lang, slug=entry[0])
+            a['updated'] = datetime.datetime.strptime(entry[1], '%Y-%m-%d')
+            items.append(a)
+    return items
+
+def get_blog_entries(num=0):
+    """
+    Returns the latest #num valid entries sorted by date, or all slugs if num=0.
+    """
+    slugs = get_blog_slugs(num)
+    entries= []
+    for slug in slugs:
+        date = get_date_from_slug(slug)
+        titlepart = slug.rsplit('/', 1)[1]
+        title = ' '.join(titlepart.split('_'))
+        entries.append((slug, date, title))
+    return entries
+
+def get_blog_slugs(num=0):
+    """
+    Returns the latest #num valid slugs sorted by date, or all slugs if num=0.
+    """
+    # list of slugs
+    slugs=[]
+    # walk over all directories/files
+    for v in os.walk(BLOG_DIR):
+        # iterate over all files
+        slugbase = os.path.relpath(v[0], BLOG_DIR)
+        for f in v[2]:
+            # ignore all non-.rst files
+            if not f.endswith('.rst'):
+                continue
+            slugs.append(safe_join(slugbase, f[:-4]))
+    slugs.sort()
+    slugs.reverse()
+    if (num > 0):
+        return slugs[:num]
+    return slugs
+
+def get_date_from_slug(slug):
+    parts = slug.split('/')
+    return "%s-%s-%s" % (parts[0], parts[1], parts[2])
+
+def render_blog_entry(slug):
+    """
+    Render the blog entry
+    TODO:
+    - caching
+    - move to own file
+    """
+    # check if that file actually exists
+    path = safe_join(BLOG_DIR, slug + ".rst")
+    if not os.path.exists(path):
+        abort(404)
+
+    # read file
+    with codecs.open(path, encoding='utf-8') as fd:
+        content = fd.read()
+
+    return publish_parts(source=content, source_path=BLOG_DIR, writer_name="html")