app/reddit/__init__.py

   1 import re
   2 import sqlite3
   3 from flask_login import current_user, login_required
   4 from flask import Blueprint, render_template, request, redirect, flash, url_for
   5 from werkzeug.exceptions import BadRequest, BadGateway
   6
   7 from ..common.common import *
   8 from .lib import *
   9
  10 frontend = Blueprint('reddit', __name__,
  11     template_folder='templates',
  12     static_folder='static',
  13     static_url_path='/static/rd')
  14
  15 @frontend.route('/feed/subreddits')
  16 @frontend.route('/r/<subreddit>/')
  17 def reddit(subreddit=None):
  18     token = getattr(current_user, 'token', 'guest')
  19     after = request.args.get('after')
  20     use_client_side_client = cf.getboolean('reddit', 'use_client_side_client', fallback=False)
  21
  22     sortorder = request.args.get('s', "hot")
  23     timerange = request.args.get('t', None)
  24
  25     if subreddit and not re.fullmatch(r"[-+_0-9A-Za-z]{2,21}", subreddit):
  26         raise BadRequest("invalid subreddit")
  27     if sortorder not in ("hot", "new", "rising", "controversial", "top"):
  28         raise BadRequest("invalid sort order")
  29     if timerange not in (None, "hour", "day", "week", "month", "year", "all"):
  30         raise BadRequest("invalid top time range")
  31
  32     all_subreddits = get_subreddits(token)
  33     subreddits = subreddit.split("+") if subreddit else all_subreddits
  34     title = f"/r/{subreddit}" if subreddit else "my subreddits"
  35
  36     if not use_client_side_client and subreddits:
  37         try:
  38             data = fetch_reddit(subreddits,
  39                     sorted_by=sortorder, time=timerange, limit=36, after=after)
  40             videos = parse_reddit_videos(data)
  41             next_page = data['data']['after']
  42         except RedditException as e:
  43             raise BadGateway(f"error retrieving reddit data: {e}")
  44
  45         # set pin/hide stati of retrieved videos
  46         video_ids = [v['video_id'] for v in videos]
  47         pinned, hidden = fetch_video_flags(token, video_ids)
  48         videos = sorted([
  49             {**v, 'pinned': v['video_id'] in pinned}
  50             for v in videos
  51             if v['video_id'] not in hidden and v['n_karma']>0
  52         ], key=lambda v:v['pinned'], reverse=True)
  53     else: # not subscribed to anything (or client side client)
  54         videos = []
  55         next_page = None
  56
  57     return render_template('reddit.html.j2', title=title, rows=videos,
  58         client_side_client=use_client_side_client, subreddit=subreddits,
  59         subreddits=all_subreddits, next_page=next_page)
  60
  61 @frontend.route('/manage/subreddits')
  62 # disabled for guest user: @login_required
  63 def subscription_manager():
  64     token = getattr(current_user, 'token', 'guest')
  65     subreddits = get_subreddits(token)
  66     return render_template('subreddit_manager.html.j2', subreddits=subreddits)
  67
  68 @frontend.route('/manage/subreddits', methods=['POST'])
  69 @login_required
  70 def manage_subscriptions():
  71     token = current_user.token
  72     if 'subscribe' in request.form:
  73         subreddit = request.form.get("subscribe")
  74         match = re.search(r"(?:(?:https?://)?(?:old.|www.|\w\w.)?reddit.com)?(?:/?r/)?([-+_0-9A-Za-z]{2,21})", subreddit)
  75         if match:
  76             subreddit = match.group(1)
  77         else:
  78             flash("invalid subreddit", "error")
  79             return redirect(request.url, code=303)
  80         with sqlite3.connect(cf['global']['database']) as conn:
  81             c = conn.cursor()
  82             c.execute("""
  83                         INSERT OR IGNORE INTO subreddits (user, subreddit)
  84                         VALUES (?, ?)
  85             """, (token, subreddit))
  86
  87     elif 'unsubscribe' in request.form:
  88         subreddit = request.form.get("unsubscribe")
  89         with sqlite3.connect(cf['global']['database']) as conn:
  90             c = conn.cursor()
  91             c.execute("""
  92                         DELETE FROM subreddits
  93                         WHERE user = ? AND subreddit = ?
  94             """, (token, subreddit))
  95             # TODO: sql-error-handling, report success
  96
  97     else:
  98         flash("unsupported action", "error")
  99
 100     return redirect(request.url, code=303)
 101
 102 def get_subreddits(token):
 103     with sqlite3.connect(cf['global']['database']) as conn:
 104         c = conn.cursor()
 105         c.execute("""
 106           SELECT subreddit
 107             FROM subreddits
 108            WHERE user = ?
 109         ORDER BY subreddit COLLATE NOCASE ASC
 110         """, (token,))
 111         subreddits = [sr for (sr,) in c.fetchall()]
 112     return subreddits
 113
 114 @frontend.app_template_filter('trim3')
 115 def trim3(n):
 116     if type(n) != int:
 117         return n # not a number
 118     elif round(n, 1) >= 10_000:
 119         return "%.0fk" % (n/1000)
 120     elif n >= 1_000:
 121         return "%.1fk" % (n/1000)
 122     else:
 123         return "%d" % n
 124
 125 @frontend.before_app_request
 126 def inject_reddit_button():
 127     if not 'header_items' in g:
 128         g.header_items = []
 129     g.header_items.append({
 130         'name': 'reddit',
 131         'url': url_for('reddit.reddit'),
 132         'parent': frontend.name,
 133         'priority': 5
 134     })