implement delete post

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Added dependency to [SUOU](https://github.com/sakuragasaki46/suou) library
 - Added user blocks
 - Added user strikes: a strike logs the content of a removed message for future use
+- Posts may now be deleted by author. If it has comments, comments are not spared
 - Implemented guild subscriptions
     + Blocking a user prevents them from seeing your comments, posts (standalone or in feed) and profile
 - Added ✨color themes✨

alembic/versions/6d418df3c72f_.py

@@ -0,0 +1,34 @@
+"""empty message
+
+Revision ID: 6d418df3c72f
+Revises: 90c7d0098efe
+Create Date: 2025-07-07 13:37:51.667620
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '6d418df3c72f'
+down_revision: Union[str, None] = '90c7d0098efe'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('comment_parent_post_id_fkey', 'freak_comment', type_='foreignkey')
+    op.create_foreign_key('comment_parent_post_id', 'freak_comment', 'freak_post', ['parent_post_id'], ['id'], ondelete='cascade')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('comment_parent_post_id', 'freak_comment', type_='foreignkey')
+    op.create_foreign_key('comment_parent_post_id_fkey', 'freak_comment', 'freak_post', ['parent_post_id'], ['id'])
+    # ### end Alembic commands ###

freak/models.py

@@ -245,7 +245,6 @@ class User(Base):
         target_id = target
 
         qq= ~select(UserBlock).where(UserBlock.c.actor_id == actor_id, UserBlock.c.target_id == target_id).exists()
-        print(qq)
         return qq
 
     def recompute_karma(self):
@@ -437,7 +436,7 @@ class Comment(Base):
     id = snowflake_column()
 
     author_id = Column(BigInteger, ForeignKey('freak_user.id', name='comment_author_id'), nullable=True)
-    parent_post_id = Column(BigInteger, ForeignKey('freak_post.id', name='comment_parent_post_id'), nullable=False)
+    parent_post_id = Column(BigInteger, ForeignKey('freak_post.id', name='comment_parent_post_id', ondelete='cascade'), nullable=False)
     parent_comment_id = Column(BigInteger, ForeignKey('freak_comment.id', name='comment_parent_comment_id'), nullable=True)
     text_content = Column(String(16384), nullable=False)
     created_at = Column(DateTime, server_default=func.current_timestamp(), index=True)

freak/templates/singledelete.html

@@ -0,0 +1,27 @@
+{% extends "base.html" %}
+{% from "macros/title.html" import title_tag with context %}
+{% from "macros/icon.html" import icon, callout with context %}
+
+{% block title %}{{ title_tag('Confirm deletion: ' + p.title, False) }}{% endblock %}
+
+{% block heading %}
+<h2><span class="faint">Confirm deletion:</span> {{ p.title }}</h2>
+{% endblock %}
+
+{% block content %}
+<div class="card">
+  <form action="/delete/post/{{ p.id | to_b32l }}" method="POST">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+    <div>
+      <p>You are about to delete <u>permanently</u> <a href="{{ p.url() }}">your post on {{ p.topic_or_user().handle() }}</a>.</p>
+      {% call callout('spoiler', 'error') %}This action <u><b>cannot be undone</b></u>.{% endcall %}
+      {% if (p.comments | count) %}
+      {% call callout('spoiler') %}Your post has <strong>{{ (p.comments | count) }} comments</strong>.  Your post will be deleted <u>along with ALL the comments</u>.{% endcall %}
+      {% endif %}
+    </div>
+    <div>
+      <button type="submit" class="primary">{{ icon('delete') }} Delete</button>
+    </div>
+  </form>
+</div>
+{% endblock %}

freak/website/__init__.py

@@ -17,6 +17,9 @@ blueprints.append(bp)
 from .edit import bp
 blueprints.append(bp)
 
+from .delete import bp
+blueprints.append(bp)
+
 from .about import bp
 blueprints.append(bp)
 

freak/website/delete.py

@@ -0,0 +1,31 @@
+
+
+from flask import Blueprint, abort, flash, redirect, render_template, request
+from flask_login import current_user, login_required
+from sqlalchemy import delete, select
+
+from ..models import Post, db
+
+
+bp = Blueprint('delete', __name__)
+
+
+@bp.route('/delete/post/<b32l:id>', methods=['GET', 'POST'])
+@login_required
+def delete_post(id: int):
+    p = db.session.execute(select(Post).where(Post.id == id, Post.author == current_user)).scalar()
+
+    if p is None:
+        abort(404)
+    if p.author != current_user:
+        abort(403)
+
+    pt = p.topic_or_user()
+    
+    if request.method == 'POST':
+        db.session.execute(delete(Post).where(Post.id == id, Post.author == current_user))
+        db.session.commit()
+        flash('Your post has been deleted')
+        return redirect(pt.url()), 303
+    
+    return render_template('singledelete.html', p=p)

freak/website/edit.py

@@ -14,7 +14,7 @@ bp = Blueprint('edit', __name__)
 @bp.route('/edit/post/<b32l:id>', methods=['GET', 'POST'])
 @login_required
 def edit_post(id):
-    p: Post | None = db.session.execute(select(Post).where(Post.id == id)).scalar()
+    p: Post | None = db.session.execute(select(Post).where(Post.id == id, Post.author == current_user)).scalar()
 
     if p is None:
         abort(404)