Show create/modify/update time

db/sqlite.py

@@ -6,31 +6,56 @@ class DB:
         pass
 
     def get_subforums(self):
-        return self._db().execute('select forum_id, name, description from subforums')
+        return self._db().execute('''
+            select f.forum_id, name, description, thread_id, title, update_time
+            from subforums f
+            left join threads t
+            on t.thread_id = (
+              select tt.thread_id
+              from threads tt
+              where f.forum_id = tt.forum_id
+              order by update_time desc
+              limit 1
+            )
+            '''
+        )
 
     def get_subforum(self, subforum):
-        return self._db().execute('select name, description from subforums where forum_id = ?', (subforum,)).fetchone()
+        return self._db().execute('''
+            select name, description
+            from subforums
+            where forum_id = ?
+            ''',
+            (subforum,)
+        ).fetchone()
 
     def get_threads(self, subforum):
-        return self._db().execute('select thread_id, title from threads where forum_id = ?', (subforum,))
+        return self._db().execute('''
+            select t.thread_id, title, t.create_time, t.update_time, t.author_id, name, count(1)
+            from threads t, users, comments c
+            where forum_id = ? and user_id = t.author_id and t.thread_id = c.thread_id
+            group by t.thread_id
+            ''',
+            (subforum,)
+        )
 
     def get_thread(self, thread):
         db = self._db()
-        title, text, author, author_id = db.execute('''
+        title, text, author, author_id, create_time, modify_time = db.execute('''
-            select title, text, name, author_id
+            select title, text, name, author_id, create_time, modify_time
             from threads, users
             where thread_id = ? and author_id = user_id
             ''',
             (thread,)
         ).fetchone()
         comments = db.execute('''
-            select comment_id, parent_id, name, text
+            select comment_id, parent_id, name, text, create_time, modify_time
             from comments, users
             where thread_id = ? and author_id = user_id
             ''',
             (thread,)
         )
-        return title, text, author, author_id, comments
+        return title, text, author, author_id, create_time, modify_time, comments
 
     def get_thread_title(self, thread_id):
         return self._db().execute('''
@@ -41,6 +66,16 @@ class DB:
             (thread_id,)
         ).fetchone()
 
+    def get_recent_threads(self, limit):
+        return self._db().execute('''
+            select thread_id, title, modify_date
+            from threads
+            order by modify_date
+            limit ?
+            ''',
+            (limit,)
+        )
+
     def get_comments(self, thread):
         return self._db().execute('''
             select text
@@ -67,7 +102,7 @@ class DB:
                 union
                 select comment_id from descendant_of, comments where id = parent_id
               )
-            select id, parent_id, name, text from descendant_of, comments, users
+            select id, parent_id, name, text, create_time, modify_time from descendant_of, comments, users
             where id = comment_id and user_id = author_id
             ''',
             (comment_id,)
@@ -155,8 +190,17 @@ class DB:
             ''',
             (thread_id, author_id, text, time, time, thread_id)
         )
-        db.commit()
+        if c.rowcount > 0:
-        return c.rowcount > 0
+            c.execute('''
+                update threads
+                set update_time = ?
+                where threads.thread_id = ?
+                ''',
+                (time, thread_id)
+            )
+            db.commit()
+            return True
+        return False
 
     def add_comment_to_comment(self, parent_id, author_id, text, time):
         db = self._db()
@@ -169,8 +213,21 @@ class DB:
             ''',
             (parent_id, author_id, text, time, time, parent_id)
         )
-        db.commit()
+        if c.rowcount > 0:
-        return c.rowcount > 0
+            c.execute('''
+                update threads
+                set update_time = ?
+                where threads.thread_id = (
+                  select c.thread_id
+                  from comments c
+                  where comment_id = ?
+                )
+                ''',
+                (time, parent_id)
+            )
+            db.commit()
+            return True
+        return False
 
     def _db(self):
         return sqlite3.connect(self.conn)

main.py

@@ -1,8 +1,9 @@
-from flask import Flask, render_template, session, request, redirect, url_for, flash
+from flask import Flask, render_template, session, request, redirect, url_for, flash, g
 from db.sqlite import DB
 import os
 import passlib.hash
 import time
+from datetime import datetime
 
 app = Flask(__name__)
 db = DB(os.getenv('DB'))
@@ -30,13 +31,15 @@ def subforum(forum_id):
 @app.route('/thread/<int:thread_id>/')
 def thread(thread_id):
     user_id = session.get('user_id')
-    title, text, author, author_id, comments = db.get_thread(thread_id)
+    title, text, author, author_id, create_time, modify_time, comments = db.get_thread(thread_id)
     comments = create_comment_tree(comments)
     return render_template(
         'thread.html',
         title = title,
         text = text,
         author = author,
+        create_time = create_time,
+        modify_time = modify_time,
         comments = comments,
         manage = author_id == user_id,
     )
@@ -174,24 +177,72 @@ def add_comment_parent(comment_id):
 
 
 class Comment:
-    def __init__(self, id, author, text):
+    def __init__(self, id, author, text, create_time, modify_time):
         self.id = id
         self.author = author
         self.text = text
         self.children = []
+        self.create_time = create_time
+        self.modify_time = modify_time
 
 def create_comment_tree(comments):
     # Collect comments first, then build the tree in case we encounter a child before a parent
     comment_map = {
-        comment_id: (Comment(comment_id, author, text), parent_id)
+        comment_id: (Comment(comment_id, author, text, create_time, modify_time), parent_id)
-        for comment_id, parent_id, author, text
+        for comment_id, parent_id, author, text, create_time, modify_time
         in comments
     }
     root = []
+    # Build tree
     for comment, parent_id in comment_map.values():
         parent = comment_map.get(parent_id)
         if parent is not None:
             parent[0].children.append(comment)
         else:
             root.append(comment)
+    # Sort each comment based on create time
+    def sort_time(l):
+        l.sort(key=lambda c: c.modify_time, reverse=True)
+        for c in l:
+            sort_time(c.children)
+    sort_time(root)
     return root
+
+@app.context_processor
+def utility_processor():
+    def format_since(t):
+        n = time.time_ns()
+        if n < t:
+            return 'In a distant future'
+
+        # Try the sane thing first
+        dt = (n - t) // 10 ** 9
+        if dt < 1:
+            return "less than a second ago"
+        if dt < 2:
+            return f"1 second ago"
+        if dt < 60:
+            return f"{dt} seconds ago"
+        if dt < 119:
+            return f"1 minute ago"
+        if dt < 3600:
+            return f"{dt // 60} minutes ago"
+        if dt < 3600 * 2:
+            return f"1 hour ago"
+        if dt < 3600 * 24:
+            return f"{dt // 3600} hours ago"
+        if dt < 3600 * 24 * 31:
+            return f"{dt // (3600 * 24)} days ago"
+
+        # Try some very rough estimate, whatever
+        f = lambda x: datetime.utcfromtimestamp(x // 10 ** 9)
+        n, t = f(n), f(t)
+        def f(x, y, s):
+            return f'{y - x} {s}{"s" if y - x > 1 else ""} ago'
+        if t.year < n.year:
+            return f(t.year, n.year, "year")
+        if t.month < n.month:
+            return f(t.month, n.month, "month")
+        # This shouldn't be reachable, but it's still better to return something
+        return "incredibly long ago"
+    return {'format_since': format_since}

templates/comment.html

@@ -1,6 +1,10 @@
+{% macro author(name, ctime, mtime) %}
+<p><sub><i>{{ name }} - {{ format_since(ctime) }}{% if ctime != mtime %} (last modified {{ format_since(mtime) }}){% endif %}</i></sub></p>
+{% endmacro %}
+
 {% macro render_comment_pre(comment) %}
 <div class=comment>
-	<p><sub><i>{{ comment.author }}</i></sub></p>
+	{{ author(comment.author, comment.create_time, comment.modify_time) }}
 	<p>{{ comment.text }}</p>
 {% endmacro %}
 

templates/comments.html

@@ -1,5 +1,5 @@
 {% extends 'base.html' %}
-{% from 'comment.html' import render_comment, render_comment_pre, render_comment_post, reply %}
+{% from 'comment.html' import render_comment, render_comment_pre, render_comment_post, reply with context %}
 
 {% block content %}
 <sup><a href="{{ url_for('thread', thread_id = thread_id) }}">thread</a></sup>

templates/index.html

@@ -4,10 +4,22 @@
 <table>
 	<tr>
 		<th>Forum</th>
+		<th>Last update</th>
 	</tr>
-	{% for id, name, description in subforums %}
+	{% for id, name, description, t_id, t_title, t_mtime in subforums %}
 	<tr>
-		<td><a href="{{ url_for('subforum', forum_id = id) }}"><b>{{ name }}</b> - {{ description }}</a></td>
+		<td>
+			<p><a href="{{ url_for('subforum', forum_id = id) }}"><b>{{ name }}</b></a></p>
+			<p>{{ description }}</p>
+		</td>
+		{% if t_id %}
+		<td>
+			<p><a href="{{ url_for('thread', thread_id = t_id) }}"><b>{{ t_title }}</b></a></p>
+			<p>{{ format_since(t_mtime) }}</p>
+		</td>
+		{% else %}
+		<td>No threads</td>
+		{% endif %}
 	</tr>
 	{% endfor %}
 </table>

templates/subforum.html

@@ -6,10 +6,18 @@
 <table>
 	<tr>
 		<th>Topic</th>
+		<th>Author</th>
+		<th>Created</th>
+		<th>Updated</th>
+		<th>Comments</th>
 	</tr>
-	{% for id, title in threads %}
+	{% for id, title, ctime, utime, author_id, author, comment_count in threads %}
 	<tr>
 		<th><a href="{{ url_for('thread', thread_id = id) }}">{{ title }}</a></th>
+		<td><a href="{{ url_for('user_info', user_id = author_id) }}">{{ author }}</a></td>
+		<td>{{ format_since(ctime) }}</td>
+		<td>{{ format_since(utime) }}</td>
+		<td>{{ comment_count }}</td>
 	</tr>
 	{% endfor %}
 </table>

templates/thread.html

@@ -1,5 +1,5 @@
 {% extends 'base.html' %}
-{% from 'comment.html' import render_comment, reply %}
+{% from 'comment.html' import render_comment, reply, author as f_author with context %}
 
 {% block content %}
 {% if manage %}
@@ -9,7 +9,7 @@
 	</form>
 </div>
 {% endif %}
-<sup><i>{{ author }}</i></sup>
+<i>{{ f_author(author, create_time, modify_time) }}</i>
 <p>{{ text }}</p>
 
 {{ reply() }}