add upstream calendars page

src/main.rs

@@ -51,6 +51,26 @@ impl Config {
             )
             .chain(self.icals.iter().map(|ical| ical.dl.clone()))
     }
+
+    fn upstreams(&self) -> Vec<CalendarUi> {
+        let Self {
+            campfires,
+            common_ninjas,
+            icals,
+            output: _,
+        } = self;
+
+        let mut upstreams: Vec<_> = campfires
+            .iter()
+            .map(|cfg| &cfg.ui)
+            .cloned()
+            .chain(common_ninjas.iter().map(|cfg| &cfg.ui).cloned())
+            .chain(icals.iter().map(|cfg| &cfg.ui).cloned())
+            .collect();
+        upstreams.sort_by_key(|ui| ui.short_name.clone());
+
+        upstreams
+    }
 }
 
 #[derive(clap::Parser)]
@@ -238,7 +258,7 @@ async fn do_everything(cli: &CliAuto) -> Result<()> {
 
     let data = read_data_from_disk(&config)?;
     let instances = process_data(&data, &config.output, now)?;
-    output::write_html(&config.output, &instances, now)?;
+    output::write_html(&config.output, &config.upstreams(), &instances, now)?;
     Ok(())
 }
 
@@ -276,7 +296,8 @@ fn main_debug_output(cli: CliDebugOutput) -> Result<()> {
     let tz = &config.output.timezone;
     let now = Utc::now().with_timezone(tz);
     let instances = process_data(&data, &config.output, now).context("Failed to process data")?;
-    output::write_html(&config.output, &instances, now).context("Failed to output HTML")?;
+    output::write_html(&config.output, &config.upstreams(), &instances, now)
+        .context("Failed to output HTML")?;
 
     Ok(())
 }