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diff --git a/pyaggr3g470r/models/article.py b/pyaggr3g470r/models/article.py
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+++ b/pyaggr3g470r/models/article.py
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+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# pyAggr3g470r - A Web based news aggregator.
+# Copyright (C) 2010-2015  Cédric Bonhomme - https://www.cedricbonhomme.org
+#
+# For more information : https://bitbucket.org/cedricbonhomme/pyaggr3g470r/
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+__author__ = "Cedric Bonhomme"
+__version__ = "$Revision: 0.4 $"
+__date__ = "$Date: 2013/11/05 $"
+__revision__ = "$Date: 2014/04/12 $"
+__copyright__ = "Copyright (c) Cedric Bonhomme"
+__license__ = "GPLv3"
+
+import json
+from datetime import datetime
+from flask import g
+from sqlalchemy import asc, desc
+
+db = g.db
+
+
+class Article(db.Model):
+    """
+    Represent an article from a feed.
+    """
+    id = db.Column(db.Integer, primary_key=True)
+    entry_id = db.Column(db.String())
+    link = db.Column(db.String())
+    title = db.Column(db.String())
+    content = db.Column(db.String())
+    readed = db.Column(db.Boolean(), default=False)
+    like = db.Column(db.Boolean(), default=False)
+    date = db.Column(db.DateTime(), default=datetime.now)
+    retrieved_date = db.Column(db.DateTime(), default=datetime.now)
+
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+    feed_id = db.Column(db.Integer, db.ForeignKey('feed.id'))
+
+    def previous_article(self):
+        """
+        Returns the previous article (older).
+        """
+        return Article.query.filter(Article.date < self.date,
+                                    Article.feed_id == self.feed_id)\
+                            .order_by(desc("Article.date")).first()
+
+    def next_article(self):
+        """
+        Returns the next article (newer).
+        """
+        return Article.query.filter(Article.date > self.date,
+                                    Article.feed_id == self.feed_id)\
+                            .order_by(asc("Article.date")).first()
+
+    def __repr__(self):
+        return json.dumps({
+                            "title": self.title,
+                            "link": self.link,
+                            "content": self.content
+                         })
+
+    def dump(self):
+        return {"id": self.id,
+                "title": self.title,
+                "link": self.link,
+                "content": self.content,
+                "readed": self.readed,
+                "like": self.like,
+                "date": self.date,
+                "retrieved_date": self.retrieved_date,
+                "feed_id": self.source.id,
+                "feed_name": self.source.title}