From c53111ea60b22503bff8ffa2033d622363721edb Mon Sep 17 00:00:00 2001
From: Alek Ratzloff <alekratz@gmail.com>
Date: Wed, 20 Jul 2022 00:28:02 -0700
Subject: [PATCH] Add user tripcodes

Users can separate their name and a password with ## to create the
illusion of consistent posting.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
---
 board/forms.py                          | 11 ++++++++++-
 board/migrations/0002_post_tripcode.py  | 18 ++++++++++++++++++
 board/models.py                         |  2 ++
 board/static/board/style.css            |  8 ++++++++
 board/templates/board/post_snippet.html |  5 ++---
 board/utils.py                          | 17 ++++++++++++++---
 6 files changed, 54 insertions(+), 7 deletions(-)
 create mode 100644 board/migrations/0002_post_tripcode.py

diff --git a/board/forms.py b/board/forms.py
index 07391b6..cbac793 100644
--- a/board/forms.py
+++ b/board/forms.py
@@ -8,9 +8,11 @@ from django.forms.models import fields_for_model
 from django.utils import timezone
 from django.utils.translation import gettext as _
 from guardian.shortcuts import get_objects_for_user
-from board.models import Ban, Post, Report, ReportReason, ReportRecord
 from hcaptcha.fields import hCaptchaField
 
+from board.models import Ban, Post, Report, ReportReason, ReportRecord
+from board.utils import generate_tripcode
+
 
 class PostForm(ModelForm):
     """
@@ -42,6 +44,13 @@ class PostForm(ModelForm):
             if not self.user or not self.user.has_perm("board.use_capcode", capcode):
                 raise ValidationError(_("Could not create post"))
 
+    def clean_name(self):
+        name = self.cleaned_data["name"]
+        if "##" in name:
+            name, password = [v.strip() for v in name.split("##", 1)]
+            self.instance.tripcode = generate_tripcode(password)
+        return name
+
 
 class ReplyForm(PostForm):
     """
diff --git a/board/migrations/0002_post_tripcode.py b/board/migrations/0002_post_tripcode.py
new file mode 100644
index 0000000..cfa7b4e
--- /dev/null
+++ b/board/migrations/0002_post_tripcode.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.1b1 on 2022-07-20 05:50
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("board", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="post",
+            name="tripcode",
+            field=models.CharField(blank=True, max_length=10),
+        ),
+    ]
diff --git a/board/models.py b/board/models.py
index 5bf0015..1221109 100644
--- a/board/models.py
+++ b/board/models.py
@@ -90,6 +90,8 @@ class Post(models.Model):
     )
     # User's supplied name for this post
     name = models.CharField(max_length=255, null=True, blank=True)
+    # User's tripcode, already calculated
+    tripcode = models.CharField(max_length=10, blank=True)
     # User's supplied subject for this post
     subject = models.CharField(max_length=255, null=True, blank=True)
     # Text of this post
diff --git a/board/static/board/style.css b/board/static/board/style.css
index 2a81c08..8293e8b 100644
--- a/board/static/board/style.css
+++ b/board/static/board/style.css
@@ -2,7 +2,9 @@
     --body: #ededed;
     --highlight: #555;
     --border-color: #555;
+    --name: #060;
     --quote: #595;
+    --subject: #333;
     --activated: #888;
     --post-background: #d9d9d9;
     --reply-background: #eee;
@@ -102,13 +104,19 @@ th {
 }
 
 .post_subject {
+    color: var(--subject);
     font-weight: bold;
 }
 
 .post_name {
+    color: var(--name);
     font-weight: bold;
 }
 
+.post_tripcode {
+    color: var(--name);
+}
+
 .post_stats {
     float: right;
 }
diff --git a/board/templates/board/post_snippet.html b/board/templates/board/post_snippet.html
index 22d47f1..b4e11fe 100644
--- a/board/templates/board/post_snippet.html
+++ b/board/templates/board/post_snippet.html
@@ -24,10 +24,9 @@
     {% if post.subject %}
         <span class="post_subject">{{post.subject}}</span>
     {% endif %}
-    {% blocktranslate with post_name=post.name|default:"Anonymous" %}
     by
-    <span class="post_name">{{post_name}}</span>
-    {% endblocktranslate %}
+    {# No spaces between the name and the tripcode #}
+    <span class="post_name">{{post.name|default:"Anonymous"}}</span>{% if post.tripcode %}<span class="post_tripcode">!!{{post.tripcode}}</span>{% endif %}
     {% if post.capcode %}
     <span class="post_capcode" style="color: {{post.capcode.color}};">{{post.capcode}}</span>
     {% endif %}
diff --git a/board/utils.py b/board/utils.py
index 8bc7a63..8b27120 100644
--- a/board/utils.py
+++ b/board/utils.py
@@ -1,9 +1,12 @@
-from typing import Optional, TYPE_CHECKING
-from django.utils import timezone
-from django.conf import settings
+import base64
+import hashlib
 import ipaddress
 import random
 import string
+from typing import Optional, TYPE_CHECKING
+
+from django.utils import timezone
+from django.conf import settings
 
 from board.models import Ban, RangeBan
 
@@ -56,3 +59,11 @@ def generate_user_token() -> str:
     User tokens need not be secure so this is a simple implementation.
     """
     return "".join(random.choices(string.ascii_letters, k=settings.USER_TOKEN_LENGTH))
+
+
+def generate_tripcode(value: str) -> str:
+    hasher = hashlib.sha256()
+    hasher.update(settings.TRIPCODE_SALT.encode())
+    hasher.update(value.encode())
+    trip = base64.b64encode(hasher.digest()).decode("ascii")
+    return trip[0:10]