Initial commit

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

board/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class BoardConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'board'

board/models.py

@@ -0,0 +1,64 @@
+from django.db import models
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+from django.urls import reverse
+from django.utils import timezone
+
+
+class Board(models.Model):
+    # The short URL name for the board
+    url = models.CharField(max_length=255, null=False, blank=False, unique=True)
+    # Human-readable name for the board
+    name = models.CharField(max_length=255, null=False, blank=False)
+
+    @property
+    def threads(self):
+        return Post.objects.filter(board=self, op=None)
+
+
+class Post(models.Model):
+    # Board that this post was made on
+    board = models.ForeignKey("Board", on_delete=models.CASCADE)
+    # Thread that this is a part of
+    op = models.ForeignKey(
+        "self", null=True, on_delete=models.CASCADE, related_name="all_replies"
+    )
+    # Post that this is replying to
+    reply = models.ForeignKey(
+        "self", null=True, on_delete=models.CASCADE, related_name="replies"
+    )
+    # User's supplied name for this post
+    name = models.CharField(max_length=255, null=True, blank=True)
+    # User's supplied subject for this post
+    subject = models.CharField(max_length=255, null=True, blank=True)
+    # Text of this post
+    text = models.TextField(max_length=10000, null=False, blank=True)
+    # The IP address of the user that made this post
+    ip = models.GenericIPAddressField()
+    # Creation time
+    created = models.DateTimeField(auto_now_add=True)
+    # Last bump time
+    last_bump = models.DateTimeField(auto_now_add=True)
+
+    # TODO : images
+
+    def get_absolute_url(self):
+        if self.op is None:
+            return reverse(
+                "board:post_detail", kwargs={"url": self.board.url, "id": self.id}
+            )
+        else:
+            return (
+                reverse(
+                    "board:post_detail",
+                    kwargs={"url": self.board.url, "id": self.op.id},
+                )
+                + f"#p{self.id}"
+            )
+
+
+@receiver(post_save, sender=Post)
+def post_created(sender, instance, created, **kwargs):
+    if created and instance.op:
+        instance.op.last_bump = timezone.now()
+        instance.op.save()

board/static/board/jquery.js

@@ -0,0 +1 @@
+jquery-3.6.0.min.js

board/static/board/post.js

@@ -0,0 +1,9 @@
+function doQuote(sender) {
+    let id_text = $("#id_text");
+    let caret = id_text[0].selectionStart;
+    let text = id_text.val();
+    let to_add = ">>" + sender.target.innerText + "\n";
+    id_text.val(text.substring(0, caret) + to_add + text.substring(caret));
+}
+
+$(document).on("click", ".post_id", doQuote);

board/static/board/style.css

@@ -0,0 +1,84 @@
+hr {
+    color: #ededed;
+}
+
+.column {
+    float: left;
+    width: 33.33%;
+}
+ 
+/* Clear floats after the columns */
+.row:after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+/* Posts */
+/*.post_body { }*/
+
+.post_id {
+    cursor: pointer;
+}
+
+.post_id:hover {
+    color: #888;
+}
+
+.post_subject {
+    font-weight: bold;
+}
+
+.post_name {
+    font-weight: bold;
+}
+
+.post {
+    background-color: #d9d9d9;
+    padding: 10px;
+}
+
+.reply {
+    background-color: #eee;
+    padding: 10px;
+    margin: 5px 0 0 0;
+}
+
+.replies_elided {
+    font-weight: italic;
+    font-size: small;
+}
+
+.quote {
+    color: #595;
+}
+
+.post_link {
+    text-decoration: underline;
+}
+
+.post_link_broken {
+    text-decoration: line-through;
+}
+
+/* Misc */
+
+a:link {
+    color:#555;
+    text-decoration: none;
+}
+
+a:visited {
+    color: #555;
+    text-decoration: none;
+}
+
+a:hover {
+    color: #888;
+    text-decoration: none;
+}
+
+a:active {
+    color: #888;
+    text-decoration: none;
+}

board/templates/board/base.html

@@ -0,0 +1,18 @@
+{% load static %}
+
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+        <title>{% block title %}{% if title %}{{title}}{% else %}Index{% endif %}{% endblock %}</title>
+        <link rel="stylesheet" href="{% static 'board/style.css' %}">
+        <script src="{% static 'board/jquery.js' %}"></script>
+        <script src="{% static 'board/post.js' %}"></script>
+    </head>
+    <body>
+        <main>
+            {% block content %}{% endblock content %}
+        </main>
+    </body>
+</html>

board/templates/board/board_detail.html

@@ -0,0 +1,57 @@
+{% extends "board/base.html" %}
+
+{% block title %}
+    {% with title=board.url %}
+        {{ block.super }}
+    {% endwith %}
+{% endblock title %}
+
+{% block content %}
+{# board header #}
+<div class="row">
+    <div class="column">&nbsp;</div>
+    <div class="column">
+        <h1>/{{ board.url }}/ - {{ board.name }}</h1>
+    </div>
+    <div class="column">&nbsp;</div>
+</div>
+<hr />
+{# post creation form #}
+<div class="row">
+    <div class="column">&nbsp;</div>
+    <div class="column">
+        <div class="row">
+        <h2>Create a new thread</h2>
+        </div>
+        <div class="row">
+            <form method="post" action="{% url 'board:board_detail' url=board.url %}">
+                {% csrf_token %}
+                <table>
+                {{ form.as_table }}
+                <tr><td>&nbsp;</td><td><input type="submit" value="Submit" /></td></tr>
+                </table>
+            </form>
+        </div>
+    </div>
+    <div class="column">&nbsp;</div>
+</div>
+<hr />
+{# posts #}
+{% for post in threads %}
+<div class="row post" id="p{{post.id}}">
+    {# TODO we need some way to parameterize the last N threads #}
+    {% with reply_link=True replies_elided=post.replies.all|length|add:"-3" %}
+        {% include "board/post_snippet.html" %}
+    {% endwith %}
+
+    {# get the last 3 replies #}
+    {% for post in post.replies.all|dictsortreversed:"id"|slice:":3" reversed %}
+    <div class="row reply" id="p{{post.id}}">
+        {% include "board/post_snippet.html" %}
+    </div>
+    {% endfor %}
+</div>
+<hr />
+{% endfor %}
+
+{% endblock content %}

board/templates/board/post_create.html

@@ -0,0 +1,9 @@
+{% extends "board/base.html" %}
+{% block content %}
+<div class="row">
+    <h1>/{{ board.url }}/</h1>
+</div>
+<div class="row">
+    {% include "board/post_create_form.html" %}
+</div>
+{% endblock content %}

board/templates/board/post_detail.html

@@ -0,0 +1,43 @@
+{% extends "board/base.html" %}
+
+{% block title %}
+    {% with title=board.url %}
+        {{ block.super }}
+    {% endwith %}
+{% endblock title %}
+
+{% block content %}
+{# board header #}
+<div class="row">
+    <div class="column">&nbsp;</div>
+    <div class="column">
+        <h1>/{{ board.url }}/ - {{ board.name }}</h1>
+    </div>
+    <div class="column">&nbsp;</div>
+</div>
+<hr />
+{# post creation form #}
+<div class="row">
+    <div class="column">&nbsp;</div>
+    <div class="column">
+        <form method="post" action="{% url 'board:post_detail' url=board.url id=post.id %}">
+            {% csrf_token %}
+            <table>
+            {{ form.as_table }}
+            <tr><td>&nbsp;</td><td><input type="submit" value="Submit" /></td></tr>
+            </table>
+        </form>
+    </div>
+    <div class="column">&nbsp;</div>
+</div>
+<hr />
+{# posts #}
+<div class="row post">
+    {% include "board/post_snippet.html" %}
+    {% for post in post.replies.all %}
+    <div class="row reply">
+        {% include "board/post_snippet.html" %}
+    </div>
+    {% endfor %}
+</div>
+{% endblock content %}

board/templates/board/post_snippet.html

@@ -0,0 +1,21 @@
+{% load post_body %}
+<div id="p{{post.id}}">
+{# TODO images #}
+<a href="#p{{post.id}}">#.</a>
+<span class="post_id">{{post.id}}</span>
+{% if post.subject %}
+    <span class="post_subject">{{post.subject}}</span>
+{% endif %}
+by <span class="post_name">{{post.name|default:"Anonymous"}}</span>
+at {{post.created}}
+{% if reply_link %}
+    [<a href="{{post.get_absolute_url}}">Reply</a>]
+{% endif %}
+{% if replies_elided > 0 %}
+<br/>
+<span class="replies_elided">
+    ({{replies_elided}} replies elided, click reply to view)
+</span>
+{% endif %}
+<p class="post_body">{{post|post_body|safe}}</p>
+</div>

board/templatetags/post_body.py

@@ -0,0 +1,93 @@
+import re
+from django import template
+from board.models import Post
+
+
+REPLY_START_RE = re.compile(r"^>>\d+")
+REPLY_RE = re.compile(r">>\d+")
+QUOTE_RE = re.compile(r">.+$")
+register = template.Library()
+
+
+def htmlspecialchars(t: str):
+    return (
+        t.replace("&", "&")
+        .replace('"', """)
+        .replace("<", "&lt;")
+        .replace(">", "&gt;")
+    )
+
+
+class ReplyBuilder:
+    def __init__(self, text: str):
+        self.text = text
+        self.index = 0
+        self.final = ""
+
+    @property
+    def c(self):
+        return self.lookahead(0)
+
+    @property
+    def n(self):
+        return self.lookahead(1)
+
+    @property
+    def remain(self):
+        return self.text[self.index :]
+
+    def lookahead(self, n):
+        if (self.index + n) < len(self.text):
+            return self.text[self.index + n]
+        else:
+            return None
+
+    def adv(self, n=1):
+        self.index += n
+
+    def build(self) -> str:
+        while self.c:
+            if self.remain[:8] == "&gt;&gt;" and self.lookahead(8) in "0123456789":
+                self.do_reply()
+            elif self.remain[:4] == "&gt;":
+                self.do_quote()
+            else:
+                self.final += self.c
+                self.adv()
+        return self.final
+
+    def do_quote(self):
+        self.adv(4)
+        self.final += '<span class="quote">&gt;'
+        while self.c and self.c != "\n":
+            if self.remain[:8] == "&gt;&gt;":
+                self.do_reply()
+            else:
+                self.final += self.c
+                self.adv()
+        self.final += "</span>"
+
+    def do_reply(self):
+        # Skip past &gt;&gt;
+        self.adv(8)
+        # Get the post ID
+        post_id = ""
+        while self.c and self.c in "0123456789":
+            post_id += self.c
+            self.adv()
+        post = Post.objects.filter(id=int(post_id)).first()
+        if post:
+            self.final += f'<a class="post_link" href="{post.get_absolute_url()}">&gt;&gt;{post_id}</a>'
+        else:
+            self.final += f'<span class="post_link_broken">&gt;&gt;{post_id}</span>'
+
+
+@register.filter(name="post_body")
+def post_body(post: Post) -> str:
+    text = htmlspecialchars(post.text)
+
+    text = ReplyBuilder(text).build()
+
+    # Finally, replace linebreaks
+    text = text.replace("\n", "<br/>")
+    return text

board/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

board/urls.py

@@ -0,0 +1,10 @@
+from django.urls import path
+from board.views import *
+
+
+app_name = "board"
+urlpatterns = [
+    path("<slug:url>/", BoardView.as_view(), name="board_detail"),
+    path("<slug:url>/page/<int:page>/", BoardView.as_view(), name="board_detail"),
+    path("<slug:url>/post/<int:id>/", PostView.as_view(), name="post_detail"),
+]

board/views.py

@@ -0,0 +1,92 @@
+from django.http import Http404, HttpResponseRedirect
+from django.shortcuts import render, get_object_or_404
+from django.views.generic import DetailView
+from django.views.generic.edit import CreateView
+
+from board.models import Post, Board
+
+__all__ = ("BoardView", "PostView")
+
+
+# TODO bump order calculation. this is kind of expensive and should *really*
+#      only be run every few seconds rather than every post.
+#      This is a scale problem and not a high priority.
+
+
+def get_client_ip(request):
+    "Get the IP address of a client-side request. Shamelessly copy/pasted from StackOverflow."
+    x_forwarded_for = request.META.get("HTTP_X_FORWARDED_FOR")
+    if x_forwarded_for:
+        ip = x_forwarded_for.split(",")[0]
+    else:
+        ip = request.META.get("REMOTE_ADDR")
+    return ip
+
+
+class BoardView(CreateView):
+    model = Post
+    fields = ["subject", "name", "text"]
+    slug_field = "url"
+    slug_url_kwarg = "url"
+
+    template_name = "board/board_detail.html"
+
+    def get_context_data(self, **kwargs):
+        board_url = self.kwargs["url"]
+        board = get_object_or_404(Board, url=board_url)
+        kwargs["board"] = board
+        page = self.kwargs.get("page", 1)
+
+        # TODO - allow max number of pages to be specified per-board
+        if page not in range(1, 10 + 1):
+            raise Http404()
+
+        PER_PAGE = 10
+        start = (page - 1) * PER_PAGE
+        end = start + PER_PAGE
+        kwargs["threads"] = board.threads.order_by("-last_bump")[start:end]
+        kwargs["page"] = page
+
+        return super(BoardView, self).get_context_data(**kwargs)
+
+    def form_valid(self, form):
+        board_url = self.kwargs["url"]
+        board = get_object_or_404(Board, url=board_url)
+
+        form.instance.board = board
+        form.instance.ip = get_client_ip(self.request)
+
+        self.object = form.save()
+
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class PostView(CreateView):
+    model = Post
+    fields = ["name", "text"]
+    slug_field = "url"
+    slug_url_kwarg = "url"
+
+    template_name = "board/post_detail.html"
+
+    def get_context_data(self, **kwargs):
+        board_url = self.kwargs["url"]
+        kwargs["board"] = get_object_or_404(Board, url=board_url)
+        post_id = self.kwargs["id"]
+        kwargs["post"] = get_object_or_404(Post, id=post_id)
+        return super(PostView, self).get_context_data(**kwargs)
+
+    def form_valid(self, form):
+        board_url = self.kwargs["url"]
+        board = get_object_or_404(Board, url=board_url)
+        post_id = self.kwargs["id"]
+        post = get_object_or_404(Post, id=post_id)
+
+        form.instance.board = board
+        form.instance.ip = get_client_ip(self.request)
+        form.instance.op = post
+        form.instance.reply = post
+
+        self.object = form.save()
+
+        return HttpResponseRedirect(post.get_absolute_url())