Implemented pulling new calendars from server

examples/basic.rs

@@ -0,0 +1,39 @@
+use std::path::Path;
+
+use my_tasks::{client::Client, traits::CalDavSource};
+use my_tasks::cache::Cache;
+use my_tasks::Provider;
+use my_tasks::settings::URL;
+use my_tasks::settings::USERNAME;
+use my_tasks::settings::PASSWORD;
+
+const CACHE_FOLDER: &str = "example_cache";
+
+
+#[tokio::main]
+async fn main() {
+    env_logger::init();
+
+    let cache_path = Path::new(CACHE_FOLDER);
+
+    let client = Client::new(URL, USERNAME, PASSWORD).unwrap();
+    let cache = match Cache::from_folder(&cache_path) {
+        Ok(cache) => cache,
+        Err(err) => {
+            log::warn!("Invalid cache file: {}. Using a default cache", err);
+            Cache::new(&cache_path)
+        }
+    };
+    let mut provider = Provider::new(client, cache);
+
+    let cals = provider.local().get_calendars().await.unwrap();
+    println!("---- before sync -----");
+    my_tasks::utils::print_calendar_list(&cals).await;
+
+    if let Err(err) = provider.sync().await {
+        log::error!("Unable to sync: {}", err);
+    }
+    println!("---- after sync -----");
+    let cals = provider.local().get_calendars().await.unwrap();
+    my_tasks::utils::print_calendar_list(&cals).await;
+}