From 040f7c16f2a9abf838b6c5ebb8af2a52cc06164b Mon Sep 17 00:00:00 2001
From: Emmanuel Leblond <emmanuel.leblond@gmail.com>
Date: Fri, 11 May 2018 17:07:13 +0200
Subject: [PATCH] Add pagination to posts page

---
 afpy.py              | 15 +++++++++++----
 templates/posts.html |  9 +++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/afpy.py b/afpy.py
index a42d977..7d1515d 100644
--- a/afpy.py
+++ b/afpy.py
@@ -20,6 +20,8 @@ cache = Cache(config={'CACHE_TYPE': 'simple', 'CACHE_DEFAULT_TIMEOUT': 600})
 app = Flask(__name__)
 cache.init_app(app)
 
+PAGINATION = 12
+
 PLANET = {
     'Emplois AFPy': 'https://www.afpy.org/feed/emplois/rss.xml',
     'Nouvelles AFPy': 'https://www.afpy.org/feed/actualites/rss.xml',
@@ -158,20 +160,25 @@ def save_post(name, timestamp=None):
 
 
 @app.route('/posts/<name>')
-def posts(name):
+@app.route('/posts/<name>/page/<int:page>')
+def posts(name, page=1):
     if name not in POSTS:
         abort(404)
     path = root / name / 'published'
-    timestamps = sorted(path.iterdir(), reverse=True)[:12]
+    timestamps = sorted(path.iterdir(), reverse=True)
+    end = page * PAGINATION
+    start = end - PAGINATION
+    total_pages = (len(timestamps) // PAGINATION) + 1
     posts = {}
-    for timestamp in timestamps:
+    for timestamp in timestamps[start:end]:
         tree = ElementTree.parse(timestamp / 'post.xml')
         posts[timestamp.name] = {item.tag: item.text for item in tree.iter()}
         if (timestamp / 'post.jpg').is_file():
             posts[timestamp.name]['image'] = '/'.join((
                 name, 'published', timestamp.name))
     return render_template(
-        'posts.html', body_id=name, posts=posts, title=POSTS[name], name=name)
+        'posts.html', body_id=name, posts=posts, title=POSTS[name], name=name,
+        page=page, total_pages=total_pages)
 
 
 @app.route('/admin/posts/<name>')
diff --git a/templates/posts.html b/templates/posts.html
index fbd8ab1..01bf1ec 100644
--- a/templates/posts.html
+++ b/templates/posts.html
@@ -22,4 +22,13 @@
       <p><a href="{{ url_for('post', name=name, timestamp=timestamp) }}">Lire la suite…</a></p>
     </article>
   {% endfor %}
+  <aside>
+  {% if page != 1 %}
+  <a href="{{ url_for('posts', name=name, page=page-1) }}">Précedente</a>
+  {% endif %}
+  Page {{ page }}/{{ total_pages }}
+  {% if page != total_pages %}
+  <a href="{{ url_for('posts', name=name, page=page+1) }}">Suivante</a>
+  {% endif %}
+  </aside>
 {% endblock main %}