start porting some topics stuff

app/routes/topics.py

@@ -1,9 +1,71 @@
-from flask import Blueprint, render_template
-from ..models import Users
+from flask import (
+    Blueprint, render_template, request, redirect, url_for, flash, session
+    )
+from .users import login_required, mod_only
+from ..models import Users, Topics, Threads
+from ..constants import InfoboxKind
+from slugify import slugify
+import time
+import math
 
 bp = Blueprint("topics", __name__, url_prefix = "/topics/")
 
+
 @bp.get("/")
 def all_topics():
     admin = Users.find({"id": 1})
-    return render_template("topics/topics.html", admin = admin)
+    return render_template("topics/topics.html", topic_list = Topics.get_list(), active_threads = Topics.get_active_threads())
+
+
+@bp.get("/create")
+@login_required
+@mod_only(".all_topics")
+def create():
+    return render_template("topics/create.html")
+
+
+@bp.post("/create")
+@login_required
+@mod_only(".all_topics")
+def create_post():
+    topic_name = request.form['name'].strip()
+    now = int(time.time())
+    slug = f"{slugify(topic_name)}-{now}"
+
+    topic_count = Topics.count()
+    topic = Topics.create({
+        "name": topic_name,
+        "description": request.form['description'],
+        "slug": slug,
+        "sort_order": topic_count + 1,
+    })
+
+    flash("Topic created.", InfoboxKind.INFO)
+    return redirect(url_for("topics.topic", slug = slug))
+
+
+@bp.get("/<slug>")
+def topic(slug):
+    THREADS_PER_PAGE = 10
+    target_topic = Topics.find({
+        "slug": slug
+    })
+    if not target_topic:
+        return "no"
+
+    threads_count = Threads.count({
+        "topic_id": target_topic.id
+    })
+
+    sort_by = session.get('sort_by', default="activity")
+
+    page_count = max(math.ceil(threads_count / THREADS_PER_PAGE), 1)
+    page = max(1, min(int(request.args.get('page', default=1)), page_count))
+
+    return render_template(
+        "topics/topic.html",
+        threads_list = target_topic.get_threads(THREADS_PER_PAGE, page, sort_by),
+        topic = target_topic,
+        current_page = page,
+        page_count = page_count
+    )