initial version

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "html_to_ics"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+regex = "1.10"
+chrono = { version = "0.4", features = ["serde"] }
+uuid = { version = "1.6", features = ["v4"] }
+reqwest = { version = "0.11", features = ["blocking"] }

README.md

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+curl -s -H 'Cookie: riscms_muellkalender=11443990_985180' \
+  'https://www.luftenberg.at/system/web/kalender.aspx?sprache=1&menuonr=226723085&typids=227710683,227710684'
+

src/main.rs

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+use regex::Regex;
+use chrono::{NaiveDate, Utc};
+use uuid::Uuid;
+use std::process;
+
+fn parse_german_date(date_str: &str) -> Option<NaiveDate> {
+    NaiveDate::parse_from_str(date_str, "%d.%m.%Y").ok()
+}
+
+fn create_ics_event(date: NaiveDate, title: &str, event_type: &str) -> String {
+    let uid = Uuid::new_v4();
+    let date_str = date.format("%Y%m%d");
+    let timestamp = Utc::now().format("%Y%m%dT%H%M%SZ");
+    
+    format!(
+        "BEGIN:VEVENT\n\
+        DTSTART;VALUE=DATE:{date_str}\n\
+        DTEND;VALUE=DATE:{date_str}\n\
+        DTSTAMP:{timestamp}\n\
+        UID:{uid}\n\
+        CREATED:{timestamp}\n\
+        DESCRIPTION:{event_type}\n\
+        LAST-MODIFIED:{timestamp}\n\
+        LOCATION:Luftenberg an der Donau\n\
+        SEQUENCE:0\n\
+        STATUS:CONFIRMED\n\
+        SUMMARY:{title}\n\
+        TRANSP:TRANSPARENT\n\
+        END:VEVENT"
+    )
+}
+
+fn fetch_waste_dates() -> Result<String, Box<dyn std::error::Error>> {
+    let client = reqwest::blocking::Client::new();
+    
+    let response = client
+        .get("https://www.luftenberg.at/system/web/kalender.aspx?sprache=1&menuonr=226723085&typids=227710683,227710684")
+        .header("Cookie", "riscms_muellkalender=11443990_985180")
+        .send()?;
+    
+    Ok(response.text()?)
+}
+
+fn html_to_ics(html_content: &str) -> Result<String, &'static str> {
+    let pattern = Regex::new(
+        r#"td_kal.*?(\d{2}\.\d{2}\.\d{4}).*?<a[^>]*>([^<]+)</a>.*?<span>([^<]+)</span>"#
+    ).unwrap();
+    
+    let mut ics_content = String::from(
+        "BEGIN:VCALENDAR\n\
+        VERSION:2.0\n\
+        PRODID:-//Luftenberg//Waste Collection Calendar//EN\n\
+        CALSCALE:GREGORIAN\n\
+        METHOD:PUBLISH\n\
+        X-WR-CALNAME:Abfalltermine Luftenberg\n\
+        X-WR-CALDESC:Waste collection dates for Luftenberg an der Donau\n\
+        X-WR-TIMEZONE:Europe/Vienna\n"
+    );
+    
+    let mut event_count = 0;
+    
+    for cap in pattern.captures_iter(html_content) {
+        let date_str = &cap[1];
+        let title = &cap[2];
+        let event_type = &cap[3];
+        
+        if let Some(date) = parse_german_date(date_str) {
+            let event = create_ics_event(date, title, event_type);
+            ics_content.push_str(&event);
+            ics_content.push('\n');
+            event_count += 1;
+        }
+    }
+    
+    if event_count == 0 {
+        return Err("No waste collection events found");
+    }
+    
+    ics_content.push_str("END:VCALENDAR");
+    Ok(ics_content)
+}
+
+fn main() {
+    let html_content = match fetch_waste_dates() {
+        Ok(content) => content,
+        Err(e) => {
+            eprintln!("Error fetching waste dates: {}", e);
+            process::exit(1);
+        }
+    };
+    
+    let ics_output = match html_to_ics(&html_content) {
+        Ok(content) => content,
+        Err(e) => {
+            eprintln!("Error: {}", e);
+            process::exit(1);
+        }
+    };
+    
+    println!("{}", ics_output);
+}