From c51c87b6d012c2a250054b47e330e1c504aebb4a Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323>
Date: Wed, 4 Aug 2021 00:04:15 +0000
Subject: pagination (navbar will be done later)

---
 apioforum/thread.py | 35 +++++++++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/apioforum/thread.py b/apioforum/thread.py
index 991dc0b..415a45c 100644
--- a/apioforum/thread.py
+++ b/apioforum/thread.py
@@ -1,6 +1,6 @@
 # view posts in thread
 
-import itertools
+import itertools, math
 
 from flask import (
     Blueprint, render_template, abort, request, g, redirect,
@@ -11,11 +11,33 @@ from .forum import get_avail_tags
 
 bp = Blueprint("thread", __name__, url_prefix="/thread")
 
+POSTS_PER_PAGE = 20
+
+def which_page(post_id):
+    # on which page lieth the post in question?
+    # forget not that page numbers employeth a system that has a base of 1.
+    # the
+    # we need impart the knowledgf e into ourselves pertaining to the
+    # number of things
+    # before the thing
+    # yes
+
+    db = get_db()
+    # ASSUMES THAT post ids are consecutive and things
+    # this is probably a reasonable assumption 
+    number_of_things_before_the_thing = db.execute('select count(*) as c from posts where thread = (select thread from posts where id = ?) and id < ?;',(post_id,post_id)).fetchone()['c']
+    
+    return 1+math.floor(number_of_things_before_the_thing/POSTS_PER_PAGE)
+
+
 def post_jump(thread_id, post_id):
     return url_for("thread.view_thread",thread_id=thread_id)+"#post_"+str(post_id)
 
 @bp.route("/<int:thread_id>")
-def view_thread(thread_id):
+@bp.route("/<int:thread_id>/page/<int:page>")
+def view_thread(thread_id,page=1):
+    if page < 1:
+        abort(400)
     db = get_db()
     thread = db.execute("SELECT * FROM threads WHERE id = ?;",(thread_id,)).fetchone()
     if thread is None:
@@ -24,8 +46,13 @@ def view_thread(thread_id):
         posts = db.execute("""
             SELECT * FROM posts
             WHERE posts.thread = ?
-            ORDER BY created ASC;
-            """,(thread_id,)).fetchall()
+            ORDER BY created ASC
+            LIMIT ? OFFSET ?;
+            """,(
+                thread_id,
+                POSTS_PER_PAGE,
+                (page-1)*POSTS_PER_PAGE,
+            )).fetchall()
         tags = db.execute(
             """SELECT tags.* FROM tags
             INNER JOIN thread_tags ON thread_tags.tag = tags.id
-- 
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