draw the rest of the owl

app/__init__.py

@@ -3,15 +3,15 @@ from dotenv import load_dotenv
 from .models import Avatars, Users, PostHistory, Posts, MOTD, BadgeUploads
 from .auth import digest
 from .routes.users import is_logged_in, get_active_user, get_prefers_theme
-from .routes.threads import get_post_url
 from .constants import (
     PermissionLevel, permission_level_string,
     InfoboxKind, InfoboxHTMLClass,
     REACTION_EMOJI, MOTD_BANNED_TAGS,
     SIG_BANNED_TAGS, STRICT_BANNED_TAGS,
     )
-from .lib.babycode import babycode_to_html, EMOJI, BABYCODE_VERSION
-from datetime import datetime
+from .lib.babycode import babycode_to_html, babycode_to_rssxml, EMOJI, BABYCODE_VERSION
+from datetime import datetime, timezone
+from flask_caching import Cache
 import os
 import time
 import secrets
@@ -55,6 +55,18 @@ def reparse_babycode():
     print('Re-parsing babycode, this may take a while...')
     from .db import db
     from .constants import MOTD_BANNED_TAGS
+
+    post_histories_without_rss = PostHistory.findall([
+        ('markup_language', '=', 'babycode'),
+        ('content_rss', 'IS', None),
+    ])
+
+    with db.transaction():
+        for ph in post_histories_without_rss:
+            ph.update({
+                'content_rss': babycode_to_rssxml(ph['original_markup']),
+            })
+
     post_histories = PostHistory.findall([
         ('markup_language', '=', 'babycode'),
         ('format_version', 'IS NOT', BABYCODE_VERSION)
@@ -65,6 +77,7 @@ def reparse_babycode():
             for ph in post_histories:
                 ph.update({
                     'content': babycode_to_html(ph['original_markup']).result,
+                    'content_rss': babycode_to_rssxml(ph['original_markup']),
                     'format_version': BABYCODE_VERSION,
                     })
         print('Re-parsing posts done.')
@@ -125,6 +138,8 @@ def bind_default_badges(path):
                 })
 
 
+cache = Cache()
+
 def create_app():
     app = Flask(__name__)
     app.config['SITE_NAME'] = 'Pyrom'
@@ -133,6 +148,10 @@ def create_app():
     app.config['USERS_CAN_INVITE'] = False
     app.config['ADMIN_CONTACT_INFO'] = ''
     app.config['GUIDE_DESCRIPTION'] = ''
+
+    app.config['CACHE_TYPE'] = 'FileSystemCache'
+    app.config['CACHE_DEFAULT_TIMEOUT'] = 300
+
     try:
         app.config.from_file('../config/pyrom_config.toml', load=tomllib.load, text=False)
     except FileNotFoundError:
@@ -142,6 +161,7 @@ def create_app():
         app.static_folder = os.path.join(os.path.dirname(__file__), "../data/static")
         app.debug = True
         app.config["DB_PATH"] = "data/db/db.dev.sqlite"
+        app.config["SERVER_NAME"] = "localhost:8080"
         load_dotenv()
     else:
         app.config["DB_PATH"] = "data/db/db.prod.sqlite"
@@ -156,6 +176,13 @@ def create_app():
     os.makedirs(os.path.dirname(app.config["DB_PATH"]), exist_ok = True)
     os.makedirs(os.path.dirname(app.config["BADGES_UPLOAD_PATH"]), exist_ok = True)
 
+    if app.config['CACHE_TYPE'] == 'FileSystemCache':
+        cache_dir = app.config.get('CACHE_DIR', 'data/_cached')
+        os.makedirs(cache_dir, exist_ok = True)
+        app.config['CACHE_DIR'] = cache_dir
+
+    cache.init_app(app)
+
     css_dir = 'data/static/css/'
     allowed_themes = []
     for f in os.listdir(css_dir):
@@ -229,10 +256,12 @@ def create_app():
 
     @app.context_processor
     def inject_funcs():
+        from .routes.threads import get_post_url
         return {
             'get_post_url': get_post_url,
             'get_prefers_theme': get_prefers_theme,
             'get_motds': MOTD.get_all,
+            'get_time_now': lambda: int(time.time()),
         }
 
     @app.template_filter("ts_datetime")
@@ -308,4 +337,8 @@ def create_app():
     def fromjson(subject: str):
         return json.loads(subject)
 
+    @app.template_filter('iso8601')
+    def unix_to_iso8601(subject: str):
+        return datetime.fromtimestamp(int(subject), timezone.utc).isoformat()
+
     return app

app/lib/babycode.py

@@ -190,7 +190,7 @@ class RSSXMLRenderer(BabycodeRenderer):
     def __init__(self, fragment=False):
         super().__init__(RSS_TAGS, VOID_TAGS, RSS_EMOJI, fragment)
 
-    def make_mention(self, element):
+    def make_mention(self, e):
         from ..models import Users
         from flask import url_for, current_app
         with current_app.test_request_context('/'):
@@ -410,10 +410,28 @@ def tag_code_rss(children, attr):
     else:
         return f'<pre><code>{children}</code></pre>'
 
+
+def tag_url_rss(children, attr):
+    if attr.startswith('/'):
+        from flask import current_app
+        uri = f"{current_app.config['PREFERRED_URL_SCHEME']}://{current_app.config['SERVER_NAME']}{attr}"
+        return f"<a href={uri}>{children}</a>"
+
+    return f"<a href={attr}>{children}</a>"
+
+def tag_image_rss(children, attr):
+    if attr.startswith('/'):
+        from flask import current_app
+        uri = f"{current_app.config['PREFERRED_URL_SCHEME']}://{current_app.config['SERVER_NAME']}{attr}"
+        return f'<img src="{uri}" alt={children} />'
+
+    return f'<img src="{attr}" alt={children} />'
+
 RSS_TAGS = {
     **TAGS,
-    'img': lambda children, attr: f'<img src="{attr}" alt={children} />',
-    'spoiler': lambda children, attr: f'<details><summary>{attr or "Spoiler"}</summary>{children}</details>',
+    'img': tag_image_rss,
+    'url': tag_url_rss,
+    'spoiler': lambda children, attr: f'<details><summary>{attr or "Spoiler"} (click to reveal)</summary>{children}</details>',
     'code': tag_code_rss,
 
     'big': lambda children, attr: f'<span style="font-size: 1.2em">{children}</span>',
@@ -424,6 +442,7 @@ VOID_TAGS = {
     'lb': lambda attr: '[',
     'rb': lambda attr: ']',
     '@': lambda attr: '@',
+    '-': lambda attr: '-',
 }
 
 # [img] is considered block for the purposes of collapsing whitespace,
@@ -544,7 +563,7 @@ def babycode_ast(s: str, banned_tags=[]):
     return elements
 
 
-def babycode_to_html(s: str, banned_tags=[], fragment=False):
+def babycode_to_html(s: str, banned_tags=[], fragment=False) -> BabycodeRenderResult:
     """
     transforms a string of babycode into html.
 
@@ -561,7 +580,7 @@ def babycode_to_html(s: str, banned_tags=[], fragment=False):
     return r.render(ast)
 
 
-def babycode_to_rssxml(s: str, banned_tags=[], fragment=False):
+def babycode_to_rssxml(s: str, banned_tags=[], fragment=False) -> str:
     """
     transforms a string of babycode into rss-compatible x/html.
 

app/lib/render_atom.py

@@ -0,0 +1,10 @@
+from flask import make_response, render_template, request
+
+def render_atom_template(template, *args, **kwargs):
+    injects = {
+        **kwargs,
+        '__current_page': request.url,
+    }
+    r = make_response(render_template(template, *args, **injects))
+    r.mimetype = 'application/xml'
+    return r

app/models.py

@@ -230,6 +230,38 @@ class Topics(Model):
 
         return db.query(q, self.id, per_page, (page - 1) * per_page)
 
+    def get_threads_with_op_rss(self):
+        q = """
+            SELECT
+                threads.id, threads.title, threads.slug, threads.created_at, threads.is_locked, threads.is_stickied,
+                users.username AS started_by,
+                users.display_name AS started_by_display_name,
+                ph.content_rss AS original_post_content,
+                posts.id AS original_post_id
+            FROM
+                threads
+            JOIN users ON users.id = threads.user_id
+            JOIN (
+                SELECT
+                    posts.thread_id,
+                    posts.id,
+                    posts.user_id,
+                    posts.created_at,
+                    posts.current_revision_id,
+                    ROW_NUMBER() OVER (PARTITION BY posts.thread_id ORDER BY posts.created_at ASC) AS rn
+            FROM
+                posts
+            ) posts ON posts.thread_id = threads.id AND posts.rn = 1
+            JOIN
+                post_history ph ON ph.id = posts.current_revision_id
+            JOIN
+                users u ON u.id = posts.user_id
+            WHERE
+            threads.topic_id = ?
+			ORDER BY threads.created_at DESC"""
+
+        return db.query(q, self.id)
+
 
 class Threads(Model):
     table = "threads"
@@ -238,6 +270,10 @@ class Threads(Model):
         q = Posts.FULL_POSTS_QUERY + " WHERE posts.thread_id = ? ORDER BY posts.created_at ASC LIMIT ? OFFSET ?"
         return db.query(q, self.id, limit, offset)
 
+    def get_posts_rss(self):
+        q = Posts.FULL_POSTS_QUERY + ' WHERE posts.thread_id = ?'
+        return db.query(q, self.id)
+
     def locked(self):
         return bool(self.is_locked)
 
@@ -265,7 +301,7 @@ class Posts(Model):
 
         SELECT
             posts.id, posts.created_at,
-            post_history.content, post_history.edited_at,
+            post_history.content, post_history.edited_at, post_history.content_rss,
             users.username, users.display_name, users.status,
             avatars.file_path AS avatar_path, posts.thread_id,
             users.id AS user_id, post_history.original_markup,

app/routes/app.py

@@ -1,7 +1,18 @@
 from flask import Blueprint, redirect, url_for, render_template
+from app import cache
+from datetime import datetime
 
 bp = Blueprint("app", __name__, url_prefix = "/")
 
 @bp.route("/")
 def index():
     return redirect(url_for("topics.all_topics"))
+
+@bp.route("/cache-test")
+def cache_test():
+    test_value = cache.get('test')
+    if test_value is None:
+        test_value = 'cached_value_' + str(datetime.now())
+        cache.set('test', test_value, timeout=10)
+        return f"set cache: {test_value}"
+    return f"cached: {test_value}"

app/routes/threads.py

@@ -1,31 +1,35 @@
 from flask import (
     Blueprint, render_template, request, redirect, url_for, flash,
-    abort,
+    abort, current_app,
     )
 from .users import login_required, mod_only, get_active_user, is_logged_in
 from ..db import db
 from ..models import Threads, Topics, Posts, Subscriptions, Reactions
 from ..constants import InfoboxKind
+from ..lib.render_atom import render_atom_template
 from .posts import create_post
 from slugify import slugify
+from app import cache
 import math
 import time
 
 bp = Blueprint("threads", __name__, url_prefix = "/threads/")
 
 
-def get_post_url(post_id, _anchor=False):
+def get_post_url(post_id, _anchor=False, external=False):
     post = Posts.find({'id': post_id})
     if not post:
         return ""
 
     thread = Threads.find({'id': post.thread_id})
 
-    res = url_for('threads.thread', slug=thread.slug, after=post_id)
-    if not _anchor:
-        return res
+    anchor = None if not _anchor else f'post-{post_id}'
 
-    return f"{res}#post-{post_id}"
+    return url_for('threads.thread', slug=thread.slug, after=post_id, _external=external, _anchor=anchor)
+    # if not _anchor:
+    #     return res
+
+    # return f"{res}#post-{post_id}"
 
 
 @bp.get("/<slug>")
@@ -80,9 +84,25 @@ def thread(slug):
         is_subscribed = is_subscribed,
         Reactions = Reactions,
         unread_count = unread_count,
+        __feedlink = url_for('.thread_atom', slug=slug, _external=True),
+        __feedtitle = f'replies to {thread.title}',
     )
 
 
+@bp.get("/<slug>/feed.atom")
+@cache.cached(timeout=5 * 60, unless=lambda: current_app.config.get('DEBUG', False))
+def thread_atom(slug):
+    thread = Threads.find({"slug": slug})
+    if not thread:
+        abort(404) # TODO throw an atom friendly 404
+        return
+
+    topic = Topics.find({'id': thread.topic_id})
+    posts = thread.get_posts_rss()
+
+    return render_atom_template('threads/thread.atom', thread=thread, topic=topic, posts=posts, get_post_url=get_post_url)
+
+
 @bp.post("/<slug>")
 @login_required
 def reply(slug):

app/routes/topics.py

@@ -1,11 +1,13 @@
 from flask import (
     Blueprint, render_template, request, redirect, url_for, flash, session,
-    abort,
+    abort, current_app
     )
 from .users import login_required, mod_only, get_active_user, is_logged_in
 from ..models import Users, Topics, Threads, Subscriptions
 from ..constants import InfoboxKind
+from ..lib.render_atom import render_atom_template
 from slugify import slugify
+from app import cache
 import time
 import math
 
@@ -80,10 +82,27 @@ def topic(slug):
         subscriptions = subscriptions,
         topic = target_topic,
         current_page = page,
-        page_count = page_count
+        page_count = page_count,
+        __feedlink = url_for('.topic_atom', slug=slug, _external=True),
+        __feedtitle = f'latest threads in {target_topic.name}',
     )
 
 
+@bp.get('/<slug>/feed.atom')
+@cache.cached(timeout=10 * 60, unless=lambda: current_app.config.get('DEBUG', False))
+def topic_atom(slug):
+    target_topic = Topics.find({
+        "slug": slug
+    })
+    if not target_topic:
+        abort(404) # TODO throw an atom friendly 404
+        return
+
+    threads_list = target_topic.get_threads_with_op_rss()
+
+    return render_atom_template('topics/topic.atom', threads_list=threads_list, target_topic=target_topic)
+
+
 @bp.get("/<slug>/edit")
 @login_required
 @mod_only(".topic", slug = lambda slug: slug)

app/templates/base.atom

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+  {% if self.title() %}
+    <title>{% block title %}{% endblock %}</title>
+  {% else %}
+    <title>{{ config.SITE_NAME }}</title>
+  {% endif %}
+  {% if self.feed_updated() %}
+    <updated>{% block feed_updated %}{% endblock %}</updated>
+  {% else %}
+    <updated>{{ get_time_now() | iso8601 }}</updated>
+  {% endif %}
+  <id>{{ __current_page }}</id>
+  <link rel="self" href="{{ __current_page }}" />
+  <link href="{% block canonical_link %}{% endblock %}" />
+  {% if self.feed_author() %}
+    <author>{% block feed_author %}{% endblock %}</author>
+  {% endif %}
+  {% block content %}{% endblock %}
+</feed>

app/templates/base.html

@@ -11,6 +11,9 @@
   <link rel="stylesheet" href="{{ ("/static/css/%s.css" % get_prefers_theme()) | cachebust }}">
   <link rel="icon" type="image/png" href="/static/favicon.png">
   <script src="{{ '/static/js/vnd/bitty-7.0.0-rc1.min.js' | cachebust }}" type="module"></script>
+  {% if __feedlink %}
+    <link rel="alternate" type="application/atom+xml" href="{{ __feedlink }}" title="{{ __feedtitle }}">
+  {% endif %}
 </head>
 <body>
   <bitty-7-0 data-connect="{{ '/static/js/bitties/pyrom-bitty.js' | cachebust }}">

app/templates/common/icons.html

@@ -53,3 +53,9 @@
 <path d="M6 18V14M6 14H8L13 17V7L8 10H5C3.89543 10 3 10.8954 3 12V12C3 13.1046 3.89543 14 5 14H6ZM17 7L19 5M17 17L19 19M19 12H21" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
 </svg>
 {%- endmacro %}
+
+{% macro icn_rss(width=24) %}
+<svg width="{{width}}px" height="{{width}}px" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M5 11C9.41828 11 13 14.5817 13 19M5 5C12.732 5 19 11.268 19 19M7 18C7 18.5523 6.55228 19 6 19C5.44772 19 5 18.5523 5 18C5 17.4477 5.44772 17 6 17C6.55228 17 7 17.4477 7 18Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
+{% endmacro %}

app/templates/common/macros.html

@@ -1,4 +1,4 @@
-{% from 'common/icons.html' import icn_image, icn_spoiler, icn_info, icn_lock, icn_warn, icn_error, icn_bookmark, icn_megaphone %}
+{% from 'common/icons.html' import icn_image, icn_spoiler, icn_info, icn_lock, icn_warn, icn_error, icn_bookmark, icn_megaphone, icn_rss %}
 {% macro pager(current_page, page_count) %}
 {% set left_start = [1, current_page - 5] | max %}
 {% set right_end = [page_count, current_page + 5] | min %}
@@ -359,3 +359,11 @@
 </div>
 </bitty-7-0>
 {% endmacro %}
+
+{% macro rss_html_content(html) %}
+<content type="html">{{ html }}</content>
+{% endmacro %}
+
+{% macro rss_button(feed) %}
+<a class="linkbutton contain-svg inline icon rss-button" href="{{feed}}" title="it&#39;s actually atom, don&#39;t tell anyone &#59;&#41;">{{ icn_rss(20) }} Subscribe via RSS</a>
+{% endmacro %}

app/templates/guides/user-guides/99-babycode.html

@@ -167,9 +167,18 @@
     <a class="mention display me" href="#mentions" title="@your-username">Your display name</a>
     <p>Mentioning a user does not notify them. It is simply a way to link to their profile in your posts.</p>
   </section>
+  <section class="guide-section">
+    {% set hr_example = "some section\n---\nanother section" %}
+    <h2 id="rule">Horizontal rules</h2>
+    <p>The special <code class="inline-code">---</code> markup inserts a horizontal separator, also known as a horizontal rule:</p>
+    {{ ("[code]%s[/code]" % hr_example) | babycode | safe }}
+    Will become
+    {{ hr_example | babycode(true) | safe}}
+    <p>Horizontal rules will always break the current paragraph.</p>
+  </section>
   <section class="guide-section">
     <h2 id="void-tags">Void tags</h2>
-    <p>The special void tags <code class="inline-code">[lb]</code>, <code class="inline-code">[rb]</code>, and <code class="inline-code">[@]</code> will appear as the literal characters <code class="inline-code">[</code>, <code class="inline-code">]</code>, and <code class="inline-code">@</code> respectively. Unlike other tags, they are self-contained and have no closing equivalent.</p>
+    <p>The special void tags <code class="inline-code">[lb]</code>, <code class="inline-code">[rb]</code>, <code class="inline-code">[-]</code> and <code class="inline-code">[@]</code> will appear as the literal characters <code class="inline-code">[</code>, <code class="inline-code">]</code>, and <code class="inline-code">@</code> respectively. Unlike other tags, they are self-contained and have no closing equivalent.</p>
     <ul class="guide-list">
       {% set lbrb = "[color=red]This text will be red[/color]\n\n[lb]color=red[rb]This text won't be red[lb]/color[rb]" %}
       <li><code class="inline-code">[lb]</code> and <code class="inline-code">[rb]</code> allow you to use square brackets without them being interpreted as Babycode:
@@ -178,6 +187,7 @@
         {{ lbrb | babycode | safe }}
       </li>
       <li>The <code class="inline-code">[@]</code> tag allows you to use the @ symbol without it being turned into a mention.</li>
+      <li>The <code class="inline-code">[-]</code> tag allows you to use the - (dash) symbol without it being turned into a rule.</li>
     </ul>
   </section>
 {% endblock %}

app/templates/threads/thread.atom

@@ -0,0 +1,19 @@
+{% extends 'base.atom' %}
+{% from 'common/macros.html' import rss_html_content %}
+{% block title %}replies to {{thread.title}}{% endblock %}
+{% block canonical_link %}{{url_for('threads.thread', slug=thread.slug, _external=true)}}{% endblock %}
+{% block content %}
+  {% for post in posts %}
+  {% set post_url = get_post_url(post.id, _anchor=true, external=true) %}
+    <entry>
+      <title>Re: {{ thread.title }}</title>
+      <link href="{{ post_url }}"/>
+      <id>{{ post_url }}</id>
+      <updated>{{ post.edited_at | iso8601 }}</updated>
+      {{rss_html_content(post.content_rss)}}
+      <author>
+        <name>{{ post.display_name }} @{{ post.username }}</name>
+      </author>
+    </entry>
+  {% endfor %}
+{% endblock %}

app/templates/threads/thread.html

@@ -1,4 +1,4 @@
-{% from 'common/macros.html' import pager, babycode_editor_form, full_post, bookmark_button %}
+{% from 'common/macros.html' import pager, babycode_editor_form, full_post, bookmark_button, rss_button %}
 {% from 'common/icons.html' import icn_bookmark %}
 {% extends "base.html" %}
 {% block title %}{{ thread.title }}{% endblock %}
@@ -53,6 +53,7 @@
           <input class="warn" type="submit" value="Move thread">
         </form>
       {% endif %}
+      {{ rss_button(url_for('threads.thread_atom', slug=thread.slug)) }}
     </div>
   </nav>
   {% for post in posts %}

app/templates/topics/topic.atom

@@ -0,0 +1,20 @@
+{% extends 'base.atom' %}
+{% from 'common/macros.html' import rss_html_content %}
+{% block title %}latest threads in {{target_topic.name}}{% endblock %}
+{% block canonical_link %}{{url_for('topics.topic', slug=target_topic.slug, _external=true)}}{% endblock %}
+{% block content %}
+<subtitle>{{ target_topic.description }}</subtitle>
+  {% for thread in threads_list %}
+    <entry>
+      <title>[new thread] {{ thread.title | escape }}</title>
+      <link href="{{ url_for('threads.thread', slug=thread.slug, _external=true)}}" />
+      <link rel="replies" type="application/atom+xml" href="{{ url_for('threads.thread_atom', slug=thread.slug, _external=true)}}" />
+      <id>{{ url_for('threads.thread', slug=thread.slug, _external=true)}}</id>
+      <updated>{{ thread.created_at | iso8601 }}</updated>
+      {{rss_html_content(thread.original_post_content)}}
+      <author>
+        <name>{{thread.started_by_display_name}} @{{ thread.started_by }}</name>
+      </author>
+    </entry>
+  {% endfor %}
+{% endblock %}

app/templates/topics/topic.html

@@ -1,4 +1,4 @@
-{% from 'common/macros.html' import pager, timestamp, motd %}
+{% from 'common/macros.html' import pager, timestamp, motd, rss_button %}
 {% from 'common/icons.html' import icn_lock, icn_sticky %}
 {% extends "base.html" %}
 {% block title %}browsing topic {{ topic['name'] }}{% endblock %}
@@ -6,7 +6,7 @@
 <nav class="darkbg">
   <h1 class="thread-title">All threads in "{{topic['name']}}"</h1>
   <span>{{topic['description']}}</span>
-  <div>
+  <div class="thread-actions">
     {% if active_user %}
       {% if not (topic['is_locked']) | int or active_user.is_mod() %}
         <a class="linkbutton" href="{{ url_for("threads.create", topic_id=topic['id']) }}">New thread</a>
@@ -18,6 +18,7 @@
           <input class="warn" type="submit" id="lock" value="{{"Unlock topic" if topic['is_locked'] else "Lock topic"}}">
         </form>
         <button type="button" class="critical" id="topic-delete-dialog-open">Delete</button>
+        {{ rss_button(url_for('topics.topic_atom', slug=topic.slug)) }}
       {% endif %}
     {% endif %}
   </div>