From 84a184bdcda6e7a87f284bbfb2c001e703036a81 Mon Sep 17 00:00:00 2001
From: Hui Lan <lanhui@zjnu.edu.cn>
Date: Wed, 10 Feb 2021 17:38:52 +0800
Subject: main.py: get the next article only when it is explicitly clicked. 
 Contributed by Mao Dun <794811132@qq.com>.

---
 app/main.py | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/app/main.py b/app/main.py
index a02d043..eadf828 100644
--- a/app/main.py
+++ b/app/main.py
@@ -166,6 +166,18 @@ def get_answer_part(s):
     return html_code
 
 
+
+@app.route("/<username>/reset", methods=['GET', 'POST'])
+def user_reset(username):
+    username = session[username]
+    user_freq_record = path_prefix + 'static/frequency/' +  'frequency_%s.pickle' % (username)
+    if request.method == 'POST':
+        session['article'] = get_today_article(user_freq_record)
+        return redirect(url_for('userpage', username=username))
+    else:
+        return 'Under construction'
+
+
 @app.route("/mark", methods=['GET', 'POST'])
 def mark_word():
     if request.method == 'POST':
@@ -293,9 +305,9 @@ def userpage(username):
         page += '<meta name="format-detection" content="telephone=no" />\n' # forbid treating numbers as cell numbers in smart phones
         page += '<title>EnglishPal Study Room for %s</title>' % (username)
         page += '<p><b>English Pal for <font color="red">%s</font></b> <a href="/logout">登出</a></p>' % (username)
-        page += '<p><a href="/%s">下一篇</a></p>' % (username)
+        page += '<p><form method="post" action="/%s/reset"><input type="submit" value="下一篇"/></form></p>' % (username)
         page += '<p><b>阅读文章并回答问题</b></p>\n'
-        page += '<div id="text-content">%s</div>'  % (get_today_article(user_freq_record))
+        page += '<div id="text-content">%s</div>'  % (session['article'])
         page += '<p><b>收集生词吧</b> （可以在正文中划词，也可以复制黏贴）</p>'
         page += '<form method="post" action="/%s">' % (username)
         page += ' <textarea name="content" id="selected-words" rows="10" cols="120"></textarea><br/>'
@@ -385,6 +397,7 @@ def login():
             session['username'] = username
             user_expiry_date = get_expiry_date(username)
             session['expiry_date'] = user_expiry_date
+            session['article'] = get_today_article(user_freq_record)
             return redirect(url_for('userpage', username=username))
         else:
             return '无法通过验证。'
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