Introduce limit/offset args for api call

suchwow/routes/api.py

@@ -1,4 +1,4 @@
-from flask import jsonify, Blueprint, url_for
+from flask import jsonify, Blueprint, url_for, request, abort
 from suchwow.models import Post
 from suchwow import wownero
 
@@ -7,8 +7,15 @@ bp = Blueprint("api", "api")
 
 @bp.route("/api/list")
 def api_list():
+    limit = request.args.get('limit', 30)
+    offset = request.args.get('offset', 0)
+    if not isinstance(limit, int) or not isinstance(offset, int):
+        abort(500, "Bleep bleep")
+    if limit > 30:
+        limit = 30
+
     all_posts = []
-    posts = Post.select().where(Post.approved==True)
+    posts = Post.select().where(Post.approved==True).order_by(Post.timestamp.desc()).limit(limit).offset(offset)
     for post in posts:
         wallet = wownero.Wallet()
         if wallet.connected: