.envrc

@@ -1,5 +1,11 @@
 #!/usr/bin/env bash
 
+if ! has nix_direnv_version || ! nix_direnv_version 3.0.5; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/3.0.5/direnvrc" "sha256-RuwIS+QKFj/T9M2TFXScjBsLR6V3A17YVoEW/Q6AZ1w="
+fi
+watch_file nix/*.nix
+use nix
+
 export DIRENV_WARN_TIMEOUT=20s
 
 eval "$(devenv direnvrc)"

.gitignore

@@ -4,3 +4,6 @@ devenv.lock
 uv.lock
 __pycache__/
 *.egg-info/
+.env*
+*.pickle
+src/kronos/*events*.html

.pre-commit-config.yaml

@@ -25,7 +25,7 @@ repos:
       - id: ruff-format
         name: Ruff format
         description: Format.
-        entry: ruff format --check --config pyproject.toml
+        entry: ruff format --config pyproject.toml
         language: system
         types: [python]
 

README.md

@@ -21,7 +21,7 @@ pre-commit install
 - Install as editable package.
 
 ```bash
-pip install -e .
+uv pip install -e .
 ```
 
 ## Run

devenv.nix

@@ -1,3 +1,4 @@
+{ pkgs, ... }:
 {
   name = "kronos";
 
@@ -11,4 +12,26 @@
       sync.allExtras = true;
     };
   };
+
+  packages = [
+    pkgs.uv
+  ];
+
+  enterShell = ''
+    echo
+    echo "🪝 Installing pre-commit"
+    echo
+    pre-commit install
+
+    echo
+    echo "✨ Installing kronos"
+    echo
+    uv pip install -e .
+
+    echo
+    echo "🙌 Welcome to kronos' devenv!"
+    echo 'To run kronos, type `kronos`'
+    echo
+    echo
+  '';
 }

kronos/main.py

@@ -1,11 +0,0 @@
-from argparse import ArgumentParser
-
-
-def _main():
-    parser = ArgumentParser(prog="kronos", description="Share events between services.")
-    parser.add_argument("--name")
-    _args = parser.parse_args()
-
-
-if __name__ == "__main__":
-    _main()

pyproject.toml

@@ -4,11 +4,36 @@ version = "0.1.0"
 description = "Share events between services."
 authors = [{ name = "Hackerspace Trójmiasto" }]
 readme = "README.md"
-license = { file = "LICENSE" }
+license-files = ["LICENSE"]
 
 requires-python = ">=3.13"
 
-dependencies = []
+dependencies = [
+  "beautifulsoup4==4.13.4",
+  "brevo-python==1.1.2",
+  "bs4==0.0.2",
+  "cachetools==6.1.0",
+  "certifi==2025.4.26",
+  "charset-normalizer==3.4.2",
+  "cssselect==1.3.0",
+  "cssutils==2.11.1",
+  "discord.py==2.7.1",
+  "html5lib==1.1",
+  "idna==3.10",
+  "Jinja2==3.1.6",
+  "lxml==6.0.0",
+  "MarkupSafe==3.0.2",
+  "more-itertools==10.7.0",
+  "premailer==3.10.0",
+  "python-dateutil==2.9.0.post0",
+  "python-dotenv==1.1.1",
+  "requests==2.32.4",
+  "six==1.17.0",
+  "soupsieve==2.7",
+  "typing_extensions==4.14.0",
+  "urllib3==2.5.0",
+  "webencodings==0.5.1",
+]
 
 [dependency-groups]
 dev = ["pre-commit", "pre-commit-hooks", "pytest", "ruff"]
@@ -47,7 +72,7 @@ exclude = [
 ]
 
 line-length = 100
-indent-width = 4
+indent-width = 2
 target-version = "py313"
 
 [tool.ruff.lint]

shell.nix

@@ -0,0 +1,8 @@
+{
+  pkgs ? import <nixpkgs> { },
+}:
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    devenv
+  ];
+}

src/kronos/discordbot.py

@@ -0,0 +1,86 @@
+import pickle
+import os.path
+import urllib.request
+
+import discord
+
+
+class KronosBot(discord.Client):
+  def attach_events(self, events):
+    print(f"Adding {len(events)} events")
+    self.events = events
+
+  async def on_ready(self):
+    event_mapping_file = "event_mapping.pickle"
+    event_mapping = dict()
+
+    try:
+      if os.path.isfile(event_mapping_file):
+        with open(event_mapping_file, "rb") as f:
+          event_mapping = pickle.load(f)
+    except Exception:
+      print("There are problems opening the pickle jar")
+
+    try:
+      print(f"Logged on as {self.user}!")
+      guilds_total = len(self.guilds)
+      print(f"I work for {guilds_total} guilds")
+      guilds_processed = 0
+      for guild in self.guilds:
+        guild_id = str(guild)
+        print(f"Processing {guild.name} as {guild.me.name}")
+        guilds_processed += 1
+        for event in self.events:
+          description = event["link"] + "\n\n" + event["description"]
+
+          picture_url = "https://hs3.pl/images/zasoby/null.jpg"
+          if event["picture_url"] is not None:
+            picture_url = event["picture_url"]
+          pic = urllib.request.urlopen(picture_url).read()
+
+          print(f"Processing event {event}")
+          if event["link"] in event_mapping and guild_id in event_mapping[event["link"]]:
+            print("Updating the event, this one already processed")
+            discord_event = guild.get_scheduled_event(event_mapping[event["link"]][guild_id])
+            if discord_event is not None:
+              await discord_event.edit(
+                name=event["title"],
+                description=description,
+                start_time=event["start_time"],
+                end_time=event["end_time"],
+                location=event["location"],
+                image=pic,
+              )
+          else:
+            discord_event = await guild.create_scheduled_event(
+              name=event["title"],
+              description=description,
+              start_time=event["start_time"],
+              end_time=event["end_time"],
+              location=event["location"],
+              image=pic,
+              entity_type=discord.EntityType.external,
+              privacy_level=discord.PrivacyLevel.guild_only,
+            )
+            if event["link"] not in event_mapping:
+              event_mapping[event["link"]] = dict()
+            event_mapping[event["link"]][guild_id] = discord_event.id
+            print(f"Mobilizon event {event['link']} mapped to Discord event {discord_event.id}")
+
+      print(f"Dumping event mapping to a pickle: {event_mapping}")
+      with open(event_mapping_file, "wb") as f:
+        pickle.dump(event_mapping, f)
+    except Exception:
+      print("There are problems processing the events, mate")
+
+    print("So long, and thanks for all the fish!")
+    await self.close()
+
+  async def on_message(self, message):
+    print(f"Message from {message.author}: {message.content}")
+
+
+intents = discord.Intents.default()
+intents.message_content = False
+
+client = KronosBot(intents=intents)

src/kronos/main.py

@@ -0,0 +1,253 @@
+import datetime
+import os
+import sys
+from zoneinfo import ZoneInfo
+from argparse import ArgumentParser
+
+import requests
+from bs4 import BeautifulSoup
+from dotenv import load_dotenv
+from jinja2 import Environment, FileSystemLoader, select_autoescape
+from premailer import transform
+
+from .discordbot import KronosBot, intents
+
+
+MOBILIZON_API_URL = "https://events.hs3.pl/api"
+QUERY_LIMIT = 100
+TIME_WINDOW_DAYS = 365
+TRUNCATE_AFTER_CHARACTERS = 300
+TEMPLATE_FILENAME = "templates/newsletter_template.html"
+OUTPUT_FILENAME = "newsletter_events.html"
+
+
+def sanitize_html(raw_html: str) -> str:
+  wrapper = f"<div>{raw_html}</div>"
+  soup = BeautifulSoup(wrapper, "html5lib")
+  div = soup.find("div")
+  cleaned = "".join(str(child) for child in div.contents)
+  return cleaned
+
+
+def get_time_window(days: int = 365):
+  now_utc = datetime.datetime.now(datetime.timezone.utc)
+  ends_utc = now_utc + datetime.timedelta(days=days)
+
+  begins_iso = now_utc.replace(microsecond=0).isoformat().replace("+00:00", "Z")
+  ends_iso = ends_utc.replace(microsecond=0).isoformat().replace("+00:00", "Z")
+  return begins_iso, ends_iso
+
+
+def build_graphql_query():
+  return """
+    query SearchEventsInWindow($beginsOn: DateTime, $endsOn: DateTime, $limit: Int) {
+      searchEvents(beginsOn: $beginsOn, endsOn: $endsOn, limit: $limit) {
+        total
+        elements {
+          __typename
+          ... on Event {
+            id
+            title
+            description
+            beginsOn
+            picture {
+              url
+            }
+            url
+            physicalAddress {
+              description
+              locality
+            }
+          }
+        }
+      }
+    }
+    """
+
+
+def fetch_events(begins_on: str, ends_on: str, limit: int = QUERY_LIMIT):
+  query = build_graphql_query()
+  variables = {"beginsOn": begins_on, "endsOn": ends_on, "limit": limit}
+  payload = {"query": query, "variables": variables}
+  headers = {"Content-Type": "application/json"}
+
+  resp = requests.post(MOBILIZON_API_URL, json=payload, headers=headers)
+  resp.raise_for_status()
+  data = resp.json()
+  if "errors" in data:
+    raise RuntimeError(f"GraphQL error: {data['errors']}")
+
+  events = []
+  for elem in data["data"]["searchEvents"]["elements"]:
+    if elem.get("__typename") == "Event":
+      begins_iso = elem.get("beginsOn")
+      if begins_iso:
+        dt = datetime.datetime.fromisoformat(begins_iso.replace("Z", "+00:00"))
+        dt_begins = datetime.datetime.fromisoformat(begins_on.replace("Z", "+00:00"))
+        dt_ends = datetime.datetime.fromisoformat(ends_on.replace("Z", "+00:00"))
+        if dt_begins <= dt < dt_ends:
+          events.append(elem)
+  return events
+
+
+def prepare_events_for_template(raw_events: list) -> list:
+  jours_semaine = [
+    "poniedziałek",
+    "wtorek",
+    "środa",
+    "czwartek",
+    "piątek",
+    "sobota",
+    "niedziela",
+  ]
+  mois_annee = [
+    "",
+    "stycznia",
+    "lutego",
+    "marca",
+    "kwietnia",
+    "maja",
+    "czerwca",
+    "lipca",
+    "sierpnia",
+    "września",
+    "października",
+    "listopada",
+    "grudnia",
+  ]
+
+  prepared = []
+  for ev in raw_events:
+    title = ev.get("title", "Untitled")
+
+    raw_desc = ev.get("description") or ""
+    cleaned_html = sanitize_html(raw_desc)
+
+    text_only = BeautifulSoup(cleaned_html, "html.parser").get_text()
+    if len(text_only) > TRUNCATE_AFTER_CHARACTERS:
+      truncated = text_only[:300].rstrip() + " …"
+    else:
+      truncated = text_only
+
+    begins_iso = ev.get("beginsOn")
+    picture = ev.get("picture")
+    picture_url = picture.get("url") if picture else None
+    link = ev.get("url") or ""
+
+    if picture_url and "?" in picture_url:
+      picture_url = picture_url.split("?", 1)[0]
+
+    phys = ev.get("physicalAddress")
+    if phys:
+      part1 = phys.get("description") or ""
+      part2 = phys.get("locality") or ""
+      location = ", ".join(x for x in (part1, part2) if x.strip())
+    else:
+      location = ""
+
+    dt_utc = datetime.datetime.fromisoformat(begins_iso.replace("Z", "+00:00"))
+    dt_paris = dt_utc.astimezone(ZoneInfo("Europe/Paris"))
+    jour_nom = jours_semaine[dt_paris.weekday()]
+    jour_num = dt_paris.day
+    mois_nom = mois_annee[dt_paris.month]
+    annee = dt_paris.year
+    heure = dt_paris.hour
+    minute = dt_paris.minute
+    minute_str = f"{minute:02d}"
+    full_date = f"{jour_nom}, {jour_num} {mois_nom} {annee} @ {heure}:{minute_str}"
+
+    prepared.append(
+      {
+        "title": title,
+        "description": truncated,
+        "full_date": full_date,
+        "picture_url": picture_url,
+        "location": location,
+        "link": link,
+        "start_time": dt_utc,
+        "end_time": dt_utc + datetime.timedelta(hours=1),
+      }
+    )
+
+  return prepared
+
+
+def render_newsletter(events: list, template_dir: str, template_name: str) -> str:
+  env = Environment(
+    loader=FileSystemLoader(searchpath=template_dir),
+    autoescape=select_autoescape(["html", "xml"]),
+  )
+  template = env.get_template(template_name)
+
+  now_paris = datetime.datetime.now(ZoneInfo("Europe/Paris")).strftime("%Y-%m-%d %H:%M")
+  return template.render(events=events, date_now=now_paris)
+
+
+def inline_css(input_html_path, output_html_path):
+  with open(input_html_path, "r", encoding="utf-8") as f:
+    html = f.read()
+  inlined_html = transform(html)
+  with open(output_html_path, "w", encoding="utf-8") as f:
+    f.write(inlined_html)
+
+
+def _main():
+  load_dotenv()
+
+  parser = ArgumentParser(prog="kronos", description="Share events between services.")
+  parser.add_argument("--name")
+  _args = parser.parse_args()
+
+  try:
+    begins_on, ends_on = get_time_window(days=TIME_WINDOW_DAYS)
+    print(
+      f"Fetching events between {begins_on} and {ends_on}...",
+      file=sys.stderr,
+    )
+
+    raw_events = list(
+      filter(
+        lambda x: "https://events.hs3.pl/" in x.get("url", ""),
+        fetch_events(begins_on, ends_on),
+      )
+    )
+    if not raw_events:
+      print("No events found in the requested period.", file=sys.stderr)
+      sys.exit(0)
+
+    for ev in raw_events:
+      print(f"{ev.get('title', 'Untitled')} — {ev.get('beginsOn', 'Unknown date')}")
+
+    raw_events.sort(key=lambda ev: ev.get("beginsOn", ""))
+
+    events = prepare_events_for_template(raw_events)
+
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    html_output = render_newsletter(
+      events=events, template_dir=script_dir, template_name=TEMPLATE_FILENAME
+    )
+
+    output_path = os.path.join(script_dir, OUTPUT_FILENAME)
+    with open(output_path, "w", encoding="utf-8") as f:
+      f.write(html_output)
+    print(f"File '{output_path}' generated successfully.", file=sys.stderr)
+
+    inlined_output_path = os.path.join(script_dir, "newsletter_events_inlined.html")
+    inline_css(output_path, inlined_output_path)
+    print(
+      f"File '{inlined_output_path}' (inline CSS) generated.",
+      file=sys.stderr,
+    )
+
+    discord_token = os.getenv("DISCORD_TOKEN")
+    client = KronosBot(intents=intents)
+    client.attach_events(events)
+    client.run(discord_token)
+
+  except Exception as exc:
+    print(f"Error: {exc}", file=sys.stderr)
+    sys.exit(1)
+
+
+if __name__ == "__main__":
+  _main()

src/kronos/templates/newsletter_template.html

@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html lang="plr">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Najbliższe wydarzenia w Hackerspace Trójmiasto (HS3)</title>
+  <style>
+    /* Dark mode */
+    @media (prefers-color-scheme: dark) {
+      .dark-mode-button {
+        background: #ffffff !important;
+        color: #000000 !important;
+        border: 1px solid #cccccc !important;
+      }
+    }
+
+    @media only screen and (max-width: 600px) {
+      .event-table {
+        display: block !important;
+        width: 100% !important;
+      }
+      .event-table tbody,
+      .event-table tr,
+      .event-table td {
+        display: block !important;
+        width: 100% !important;
+        box-sizing: border-box !important;
+      }
+      .event-image {
+        text-align: center !important;
+        padding: 20px 20px 10px 20px !important;
+      }
+      .event-content {
+        padding: 10px 10px 20px 10px !important;
+        width: 100% !important;
+      }
+      .event-image img {
+        width: 100% !important;
+        height: auto !important;
+        max-width: 300px !important;
+      }
+      /* Simplification mobile */
+      .event-content * {
+        max-width: none !important;
+        width: auto !important;
+        display: inline-block !important;
+        white-space: normal !important;
+      }
+      .event-content h2 {
+        display: block !important;
+        width: 100% !important;
+      }
+      .event-content a {
+        display: inline-block !important;
+        width: auto !important;
+        max-width: 200px !important;
+      }
+      .event-content div[style*="background:#ff7105"] {
+        white-space: nowrap !important;
+        font-size: 12px !important;
+        padding: 4px 8px !important;
+      }
+    }
+  </style>
+</head>
+<body style="background-color:#f0f2f5; font-family:Helvetica,Arial,sans-serif; color:#333; padding:20px;">
+  <div style="max-width:800px; margin:0 auto; background:#fff; border-radius:8px; overflow:hidden; box-shadow:0 4px 16px #eee;">
+    <div style="text-align:center; padding:40px 20px 20px 20px; background:#4B64F2;">
+      <img src="https://img.notionusercontent.com/s3/prod-files-secure%2F00deef52-50e0-4f54-b2ee-5c2fbc2c4c6d%2F2ad5c423-a798-4a76-9a07-9be972f119cb%2FHS_LOGO_COLOR_BLACK.png/size/w=1440?exp=1773155386&sig=QdEp5ee-WNVt8umc9b3zwnO4lrUpbwRKYym5aG0zyL4&id=89cbb915-e2d5-4d18-85d7-2c8cf5bae1b5&table=block" alt="Hackerspace Trójmiasto" style="width:230px; display:block; margin:0 auto 24px auto;">
+      <h1 style="color:#fff; font-size:24px; font-weight:500; margin:0;">NAJBLIŻSZE WYDARZENIA W HACKERSPACE TRÓJMIASTO (HS3)</h1>
+    </div>
+    <div style="padding:32px 10px 10px 10px; overflow-x:hidden;">
+      {% for event in events %}
+      <table class="event-table" width="100%" cellpadding="0" cellspacing="0" border="0" style="margin-bottom:32px; background:#fff; border-radius:8px; border:1px solid #eee; table-layout:fixed;">
+        <tr>
+          {% if event.picture_url %}
+          <td class="event-image" width="220" valign="top" style="padding:20px;">
+            <img src="{{ event.picture_url }}" alt="Photo de l'événement" style="display:block; max-width:200px; height:auto;">
+          </td>
+          {% endif %}
+          <td class="event-content" valign="top" style="padding:20px; overflow:hidden;">
+            <h2 style="font-size:20px; color:#2a2a2a; margin:0 0 8px 0; line-height:1.2; max-width:100%; white-space:normal;">{{ event.title }}</h2>
+            <div style="background:#ff7105; color:#fff; padding:6px 12px; border-radius:20px; font-size:14px; margin-bottom:12px; margin-top:4px; display:inline-block; font-weight:500; white-space:nowrap;">
+              {{ event.full_date }}
+            </div>
+            {% if event.location %}
+            <div style="font-size:15px; color:#000; font-weight:500; margin-bottom:6px; max-width:100%; white-space:normal;">Gdzie : {{ event.location }}</div>
+            {% endif %}
+            <div style="font-size:15px; color:#444; margin-bottom:12px; max-width:100%; white-space:normal;">{{ event.description }}</div>
+            {% if event.link %}
+            <a href="{{ event.link }}" class="dark-mode-button" style="display:inline-block; background:#4B64F2; color:#fff; text-decoration:none; padding:10px 20px; border-radius:4px; font-weight:500;">Sprawdź na HS3 Events</a>
+            {% endif %}
+          </td>
+        </tr>
+      </table>
+      {% endfor %}
+    </div>
+    <div style="padding:20px; text-align:center; font-size:14px; color:#777; background:#fafbfd;">
+      <p>Otrzymujesz ten newsletter ponieważ jesteś super cool 1337 osobą subskrybującą info HS3.</p>
+    </div>
+  </div>
+</body>
+</html>