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use std::{fs, io::Write, path::PathBuf};
use clap::Parser;
use serde::Deserialize;
use regex::Regex;
use tempfile::tempdir;
use reqwest::blocking::Client;
/// ICS zu CalDAV Uploader
#[derive(Parser, Debug)]
#[command(author, version, about, long_about = None)]
struct Args {
/// Pfad zur Konfigurationsdatei (config.json)
#[arg(short, long, value_name = "FILE")]
config: PathBuf,
}
#[derive(Deserialize)]
struct Config {
caldav_base_url: String,
caldav_username: String,
caldav_password: String,
calendars: Vec<CalendarEntry>,
}
#[derive(Deserialize)]
struct CalendarEntry {
name: String,
ics: String,
}
fn main() -> anyhow::Result<()> {
let args = Args::parse();
let config_data = fs::read_to_string(&args.config)?;
let config: Config = serde_json::from_str(&config_data)?;
let tmp_dir = tempdir()?;
let client = Client::builder()
.timeout(std::time::Duration::from_secs(60))
.build()?;
for cal in &config.calendars {
println!("INFO: Lade ICS von: {}", cal.ics);
let ics_path = tmp_dir.path().join(format!("{}.ics", cal.name));
let response = client.get(&cal.ics).send()?;
if !response.status().is_success() {
eprintln!("WARNING: Fehler beim Herunterladen von {}", cal.ics);
continue;
}
let ics_content = response.text()?;
fs::write(&ics_path, &ics_content)?;
let caldav_url = format!("{}/{}", config.caldav_base_url.trim_end_matches('/'), cal.name);
println!("INFO: Zerlege Datei: {:?}", ics_path);
let vevent_blocks = split_vevents(&ics_content);
for vevent in vevent_blocks {
if let Some(uid) = extract_uid(&vevent) {
let safe_uid = sanitize_filename(&uid);
let event_path = tmp_dir.path().join(format!("{}.ics", safe_uid));
let mut event_file = fs::File::create(&event_path)?;
writeln!(event_file, "BEGIN:VCALENDAR")?;
writeln!(event_file, "VERSION:2.0")?;
writeln!(event_file, "PRODID:-//calendar script//EN")?;
writeln!(event_file, "{}", vevent.trim())?;
writeln!(event_file, "END:VCALENDAR")?;
println!("INFO: Lade UID={} → {}/{}.ics", safe_uid, caldav_url, safe_uid);
let put_url = format!("{}/{}.ics", caldav_url, safe_uid);
let body = fs::read(&event_path)?;
let put_response = client
.put(&put_url)
.basic_auth(&config.caldav_username, Some(&config.caldav_password))
.header("Content-Type", "text/calendar; charset=utf-8")
.body(body)
.send()?;
println!("→ HTTP-Code: {}", put_response.status());
}
}
}
Ok(())
}
fn split_vevents(ics: &str) -> Vec<String> {
let mut vevents = Vec::new();
let mut in_event = false;
let mut buffer = String::new();
for line in ics.lines() {
if line.trim() == "BEGIN:VEVENT" {
in_event = true;
buffer.clear();
}
if in_event {
buffer.push_str(line);
buffer.push('\n');
}
if line.trim() == "END:VEVENT" && in_event {
in_event = false;
vevents.push(buffer.clone());
}
}
vevents
}
fn extract_uid(event: &str) -> Option<String> {
for line in event.lines() {
if line.starts_with("UID:") {
return Some(line.trim_start_matches("UID:").trim().to_string());
}
}
None
}
fn sanitize_filename(name: &str) -> String {
let re = Regex::new(r"[^a-zA-Z0-9._-]").unwrap();
re.replace_all(name, "_").to_string()
}
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