From 0e2fcf3195a2919ca9ea808cc2adedd4af7ff743 Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Tue, 13 Jun 2023 12:30:20 +0200
Subject: [PATCH] Init repository

---
 .gitignore           |  2 ++
 README.md            | 21 ++++++++++++
 assets/style.css     | 43 +++++++++++++++++++++++++
 chaosevents.py       | 77 ++++++++++++++++++++++++++++++++++++++++++++
 flake.lock           | 27 ++++++++++++++++
 flake.nix            | 40 +++++++++++++++++++++++
 pyproject.toml       | 34 +++++++++++++++++++
 templates/index.html | 43 +++++++++++++++++++++++++
 8 files changed, 287 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 assets/style.css
 create mode 100755 chaosevents.py
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 pyproject.toml
 create mode 100644 templates/index.html

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..94280ef
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+html
+result
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..774984f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,21 @@
+# Chaos Events
+
+This repository contains code that generates the [Chaos Events Website](https://chaosevents.clerie.de).
+
+If fetches an ICS from a URL and generates html files that get placed in a specified directory.
+
+## Use with pip
+
+```
+pip install .
+```
+
+```
+chaosevents path/to/out/directory
+```
+
+## Use with flake
+
+```
+nix run . -- path/to/out/directory
+```
diff --git a/assets/style.css b/assets/style.css
new file mode 100644
index 0000000..4ccacb2
--- /dev/null
+++ b/assets/style.css
@@ -0,0 +1,43 @@
+* {
+	padding: 0;
+	margin: 0;
+}
+
+body {
+	font-family: Arial, Helvetica, sans-serif;
+}
+
+.container {
+	max-width: 800px;
+	padding: 20px;
+	margin: auto;
+}
+
+header {
+	margin-top: 40px;
+	margin-bottom: 80px;
+	text-align: center;
+}
+
+section {
+	margin-top: 40px;
+	margin-bottom: 40px;
+}
+
+section h2 {
+	text-align: center;
+}
+
+section h3 .date {
+	font-size: medium;
+	color: dimgray;
+}
+
+section .description {
+	padding: 10px;
+	list-style-position: inside;
+}
+
+footer {
+	text-align: center;
+}
diff --git a/chaosevents.py b/chaosevents.py
new file mode 100755
index 0000000..8fa5bbd
--- /dev/null
+++ b/chaosevents.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+
+import arrow
+from ics import Calendar
+from jinja2 import Environment, FileSystemLoader, select_autoescape
+from markdown2 import Markdown
+from pathlib import Path
+import re
+import requests
+import sys
+
+basepath = Path(__file__).resolve().parent
+
+env = Environment(
+    loader=FileSystemLoader(basepath / "templates"),
+    autoescape=select_autoescape()
+)
+
+def render_markdown(text):
+    pattern = re.compile(
+        r"""
+            \b
+            (
+                (?:https?://|(?<!//)www\.)    # prefix - https:// or www.
+                \w[\w_\-]*(?:\.\w[\w_\-]*)*   # host
+                [^<>\s"']*                    # rest of url
+                (?<![?!.,:*_~);])             # exclude trailing punctuation
+                (?=[?!.,:*_~);]?(?:[<\s]|$))  # make sure that we're not followed by " or ', i.e. we're outside of href="...".
+            )
+        """,
+        re.X
+    )
+
+    markdown = Markdown(
+        extras=["link-patterns"], 
+        link_patterns=[(pattern, r'\1')]
+    )
+
+    return markdown.convert('' if text is None else text)
+
+def main(ics_url, out_path):
+
+    (out_path / "style.css").write_text((basepath / "assets" / "style.css").read_text())
+
+    r = requests.get(ics_url)
+
+
+    c = Calendar(r.text)
+    t = c.timeline
+
+    for e in t:
+        e.description_rendered = render_markdown(e.description)
+
+    (out_path / "chaosevents.ics").write_text(r.text)
+
+    (out_path / "index.html").write_text(
+        env.get_template("index.html").render(
+            currentevents=t.now() if any(t.now()) else None,
+            upcomingevents=t.start_after(arrow.utcnow())
+        )
+    )
+
+
+def cli():
+    ics_url = "https://cloud.fem.tu-ilmenau.de/remote.php/dav/public-calendars/Q58G8xM52HXPc6Jj/?export"
+
+    out_path = Path("html")
+
+    if len(sys.argv) > 1:
+        out_path = Path(sys.argv[1])
+
+    out_path.mkdir(exist_ok=True)
+
+    main(ics_url, out_path)
+
+if __name__ == "__main__":
+    cli()
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..fa7d291
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1686501370,
+        "narHash": "sha256-G0WuM9fqTPRc2URKP9Lgi5nhZMqsfHGrdEbrLvAPJcg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "75a5ebf473cd60148ba9aec0d219f72e5cf52519",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..e60ea2c
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,40 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+  outputs = { self, nixpkgs, ... }: {
+    packages.x86_64-linux = let
+      pkgs = import nixpkgs {
+        system = "x86_64-linux";
+      };
+    in {
+      chaosevents = pkgs.python311Packages.buildPythonPackage rec {
+        pname = "chaosevents";
+        version = "0.0.1";
+
+        src = ./.;
+
+        format = "pyproject";
+
+        buildInputs = [ pkgs.python311Packages.hatchling ];
+        propagatedBuildInputs = with pkgs.python311Packages; [ attrs ics jinja2 markdown2 requests ];
+
+        pythonImportsCheck = [ "chaosevents" ];
+      };
+      default = self.packages.x86_64-linux.chaosevents;
+    };
+
+    apps.x86_64-linux = {
+      chaosevents = {
+        type = "app";
+        program = self.packages.x86_64-linux.chaosevents + "/bin/chaosevents";
+      };
+      default = self.apps.x86_64-linux.chaosevents;
+    };
+
+    hydraJobs = {
+      inherit (self)
+        packages;
+    };
+  };
+}
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..d141df3
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,34 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "chaosevents"
+version = "0.0.1"
+authors = [
+  { name="clerie", email="hallo@clerie.de" },
+]
+description = ""
+readme = "README.md"
+requires-python = ">=3.11"
+
+dependencies = [
+  "ics",
+  "jinja2",
+  "markdown2",
+  "requests",
+]
+
+[project.scripts]
+chaosevents = "chaosevents:cli"
+
+[project.urls]
+"Source" = "https://git.clerie.de/clerie/chaosevents"
+
+[tool.hatch.build]
+include = [
+  "*.py",
+  "assets",
+  "templates",
+]
+
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..b21a0ab
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>Upcoming Chaos Events</title>
+    <link rel="stylesheet" href="/style.css">
+</head>
+<body>
+    <div class="container">
+    <header>
+	<h1>Chaos Events</h1>
+        <div>
+            <a href="/chaosevents.ics">Add to calendar</a> | <a href="mailto:chaosevents@clerie.de"> Event missing?</a>
+        </div>
+    </header>
+    {% if currentevents %}
+    <section>
+        <h2>Current</h2>
+    </section>
+    {% for event in currentevents %}
+    <section>
+	<h3>{{ event.name }} <span class="date">{{ event.begin.format("YYYY-MM-DD") }} - {{ event.end.shift(seconds=-1).format("YYYY-MM-DD") }}</span></h3>
+	<div class="description">
+	    {{ event.description_rendered|safe }}
+	</div>
+    </section>
+    {% endfor %}
+    {% endif %}
+    <section>
+        <h2>Upcoming</h2>
+    </section>
+    {% for event in upcomingevents %}
+    <section>
+	<h3>{{ event.name }} <span class="date">{{ event.begin.format("YYYY-MM-DD") }} - {{ event.end.shift(seconds=-1).format("YYYY-MM-DD") }}</span></h3>
+	<div class="description">
+	    {{ event.description_rendered|safe }}
+	</div>
+    </section>
+    {% endfor %}
+    <footer>
+        <a href="https://legal.clerie.de/impressum">Imprint</a> | <a href="https://legal.clerie.de/datenschutz">Privacy</a>
+    </footer>
+    </div>
+</body>