From 59924f8021b0fd442c1ba7955e12272aae1217a9 Mon Sep 17 00:00:00 2001
From: Corder Guy <corder@tamu.edu>
Date: Thu, 19 Apr 2018 13:46:51 -0500
Subject: [PATCH] Implement top_n

---
 mocha_server.py | 51 +++++++++++++++----------------------------------
 1 file changed, 15 insertions(+), 36 deletions(-)

diff --git a/mocha_server.py b/mocha_server.py
index 69cb3f2..5fad336 100755
--- a/mocha_server.py
+++ b/mocha_server.py
@@ -11,9 +11,9 @@ DATABASE = '/usr/local/www/mocha-server/mocha.db'
 if not path.exists(DATABASE):
     DATABASE = 'mocha.db'
 
-# TODO: Add fetching of top N users by score
 # TODO: Add ability to store and retrieve avatars (as image files?)
 
+
 def fetch_users(user_ids):
     '''
     Gets a list of users searching by name.
@@ -37,39 +37,6 @@ def fetch_users(user_ids):
     return output
 
 
-def get_top_n(search_parameter, desc, num):
-    '''
-    In progress.
-    Currently the query seems to work, but returning a dict does not
-    preserve order.
-
-    Store an orderd id list and put that in the json?
-
-    Alternatively, sort on the client-side.
-    '''
-    conn = sqlite3.connect(DATABASE)
-    conn.row_factory = sqlite3.Row
-    cursor = conn.cursor()
-    if desc:
-        cursor.execute('select * from users order by ? desc limit ?',
-                       (search_parameter, num))
-    else:
-        cursor.execute('select * from users order by ? asc limit ?',
-                       (search_parameter, num))
-
-    output = cursor.fetchall()
-    # print(output)
-
-    output = json.dumps([dict(row) for row in output])
-    conn.commit()
-    conn.close()
-
-    if output == '[]':
-        output = None
-
-    return output
-
-
 # add new parameters as needed
 def update_row(_user_id, _updated_username):
     '''
@@ -124,7 +91,19 @@ def fetch_top_n(num):
     '''
     Retrieves the top n users by score.
     '''
-    output = get_top_n('score', True, num)
+    conn = sqlite3.connect(DATABASE)
+    conn.row_factory = sqlite3.Row
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM users ORDER BY score DESC')
+    output = cursor.fetchall()
+
+    output = json.dumps([dict(row) for row in output][:num])
+    conn.commit()
+    conn.close()
+
+    if output == '[]':
+        output = None
+
     return output
 
 
@@ -175,7 +154,7 @@ def application(environ, start_response):
 
 
 if __name__ == '__main__':
-    print(fetch_users(['1', '2', '3']))
+    print(fetch_top_n(3))
 
 
 # vim: tabstop=4 shiftwidth=4 softtabstop=4 expandtab