explore: Unsuccessful attempt at using kaldav cratetopic/caldav-crates

3 files changed, 89 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 863b742..dd92830 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,5 +4,7 @@ version = "0.0.1"
 edition = "2021"
 
 [dependencies]
+anyhow = "1.0.86"
 crossbeam-channel = "0.5.13"
 cursive = "0.20.0"
+kaldav = "0.2.0"
diff --git a/src/bin/caldav-crates.rs b/src/bin/caldav-crates.rs
new file mode 100644
index 0000000..258b248
--- /dev/null
+++ b/src/bin/caldav-crates.rs
@@ -0,0 +1,87 @@
+use {
+    anyhow::{
+        Result,
+
+        anyhow,
+    },
+    std::env::args,
+};
+
+struct CrateKaldav {
+    client: kaldav::Client,
+}
+
+impl CrateKaldav {
+    fn new(url: &str, username: String, password: Option<String>) -> Self {
+        println!("kaldav");
+
+        let mut client = kaldav::Client::new(url);
+        client.set_auth(Some(kaldav::Authorization { username, password, }));
+
+        Self {
+            client,
+        }
+    }
+
+    fn show_content(&self) -> Result<()> {
+        // This function does not do what we want, because Principal::home() does not appear to
+        // work in our environment.
+        // Reading https://datatracker.ietf.org/doc/html/rfc4791#section-6.2.1 reveals that the
+        // CALDAV:calendar-home-set property merely SHOULD, rather than MUST, be implemented.
+
+        let principals = self.client.principals()?;
+        // eprintln!("Principals: {principals:?}");
+
+        let mut home = None;
+        println!("Attempting to find home.");
+        for p in principals {
+            home = p.home().ok();
+            if home.is_some() {
+                break;
+            }
+        }
+        if home.is_some() {
+            println!("Found home: {home:?}");
+        } else {
+            return Err(anyhow!("No home found in any Principal. :("));
+        }
+
+        // This function is heavily based on:
+        // https://github.com/sanpii/kaldav/blob/main/examples/list_events.rs
+        eprintln!("Retrieving list of calendars.");
+        let calendars = self.client.calendars()?;
+
+        for (name, calendar) in calendars {
+            println!("Calendar '{}'", name);
+
+            let objects = calendar.events()?;
+
+            if objects.is_empty() {
+                println!("  no events");
+                continue;
+            }
+
+            for object in objects {
+                for event in object.events {
+                    println!(
+                        "  {} - {}",
+                        event.dtstart,
+                        event.summary.unwrap_or_default()
+                    );
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
+fn main() -> Result<()> {
+    let caldav_url = args().nth(1).expect("Missing caldav url argument.");
+    let username = args().nth(2).expect("Missing username argument.");
+    let password = args().nth(3).expect("Missing password argument.");
+
+    let kaldav = CrateKaldav::new(&caldav_url, username.clone(), Some(password.clone()));
+    kaldav.show_content()?;
+
+    Ok(())
+}
diff --git a/src/main.rs b/src/bin/ccc.rs
index 13d24d6..13d24d6 100644
--- a/src/main.rs
+++ b/src/bin/ccc.rs