Implement show subcommand

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

bin/domain/imag-calendar/src/main.rs

@@ -87,6 +87,7 @@ fn main() {
         match name {
             "import" => import(&rt),
             "list"   => list(&rt),
+            "show"   => show(&rt),
             other    => {
                 warn!("Right now, only the 'import' command is available");
                 debug!("Unknown command");
@@ -250,6 +251,57 @@ fn list(rt: &Runtime) {
         });
 }
 
+fn show(rt: &Runtime) {
+    let scmd        = rt.cli().subcommand_matches("show").unwrap(); // safe by clap
+    let ref_config  = rt.config()
+        .ok_or_else(|| format_err!("No configuration, cannot continue!"))
+        .map_err_trace_exit_unwrap()
+        .read_partial::<libimagentryref::reference::Config>()
+        .map_err(Error::from)
+        .map_err_trace_exit_unwrap()
+        .ok_or_else(|| format_err!("Configuration missing: {}", libimagentryref::reference::Config::LOCATION))
+        .map_err_trace_exit_unwrap();
+
+    let list_format = util::get_event_print_format("calendar.show_format", rt, &scmd)
+        .map_err_trace_exit_unwrap();
+
+    let mut shown_events = 0;
+
+    scmd.values_of("show-ids")
+        .unwrap() // safe by clap
+        .into_iter()
+        .filter_map(|id| {
+            util::find_event_by_id(rt.store(), id, &ref_config)
+                .map(|entry| { debug!("Found => {:?}", entry); entry })
+                .map_err_trace_exit_unwrap()
+                .map(|parsed| (parsed, id))
+        })
+        .for_each(|(parsed_entry, id)| {
+            parsed_entry
+                .get_data()
+                .events()
+                .filter_map(RResult::ok)
+                .filter(|pent| {
+                    let relevant = pent.uid().map(|uid| uid.raw().starts_with(id)).unwrap_or(false);
+                    debug!("Relevant {} => {}", parsed_entry.get_entry().get_location(), relevant);
+                    relevant
+                })
+                .for_each(|event| {
+                    shown_events = shown_events + 1;
+                    let data     = util::build_data_object_for_handlebars(shown_events, &event);
+
+                    let rendered = list_format
+                        .render("format", &data)
+                        .map_err(Error::from)
+                        .map_err_trace_exit_unwrap();
+
+                    writeln!(rt.stdout(), "{}", rendered).to_exit_code().unwrap_or_exit()
+                });
+
+            rt.report_touched(parsed_entry.get_entry().get_location()).unwrap_or_exit();
+        });
+}
+
 /// helper function to check whether a DirEntry points to something hidden (starting with dot)
 fn is_not_hidden(entry: &DirEntry) -> bool {
     !entry.file_name().to_str().map(|s| s.starts_with(".")).unwrap_or(false)

bin/domain/imag-calendar/src/ui.rs

@@ -89,6 +89,25 @@ pub fn build_ui<'a>(app: App<'a, 'a>) -> App<'a, 'a> {
                         .multiple(false)
                         .help("List events which are dated after certain date"))
                    )
+
+        .subcommand(SubCommand::with_name("show")
+                   .about("Show one or several calendar entries")
+                   .version("0.1")
+                   .arg(Arg::with_name("show-ids")
+                        .index(1)
+                        .takes_value(true)
+                        .required(true)
+                        .multiple(true)
+                        .help("UIDs of Calendar entries to show"))
+
+                   .arg(Arg::with_name("format")
+                        .long("format")
+                        .short("F")
+                        .takes_value(true)
+                        .required(false)
+                        .multiple(false)
+                        .help("Override the format used to show events"))
+                   )
 }
 
 fn import_validator<A: AsRef<str>>(s: A) -> Result<(), String> {

bin/domain/imag-calendar/src/util.rs

@@ -31,11 +31,13 @@ use chrono::NaiveDateTime;
 
 use libimagrt::runtime::Runtime;
 use libimagstore::store::FileLockEntry;
+use libimagstore::store::Store;
 use libimagentryref::reference::fassade::RefFassade;
 use libimagentryref::reference::Ref;
 use libimagentryref::reference::Config;
 use libimagentryref::hasher::default::DefaultHasher;
 use libimagerror::trace::MapErrTrace;
+use crate::libimagcalendar::store::EventStore;
 
 #[derive(Debug)]
 pub struct ParsedEventFLE<'a> {
@@ -143,3 +145,46 @@ pub fn kairos_parse(spec: &str) -> Result<NaiveDateTime> {
         }
     }
 }
+
+pub fn find_event_by_id<'a>(store: &'a Store, id: &str, refconfig: &Config) -> Result<Option<ParsedEventFLE<'a>>> {
+    if let Some(entry) = store.get_event_by_uid(id)? {
+        debug!("Found directly: {} -> {}", id, entry.get_location());
+        return ParsedEventFLE::parse(entry, refconfig).map(Some)
+    }
+
+    for sid in store.all_events()? {
+        let sid = sid?;
+
+        let event = store.get(sid.clone())?.ok_or_else(|| {
+            format_err!("Cannot get {}, which should be there.", sid)
+        })?;
+
+        trace!("Checking whether {} is represented by {}", id, event.get_location());
+        let parsed = ParsedEventFLE::parse(event, refconfig)?;
+
+        if parsed
+            .get_data()
+            .events()
+            .filter_map(|event| if event
+                .as_ref()
+                .map(|e| {
+                    trace!("Checking whether {:?} starts with {}", e.uid(), id);
+                    e.uid().map(|uid| uid.raw().starts_with(id)).unwrap_or(false)
+                })
+                .unwrap_or(false)
+            {
+                trace!("Seems to be relevant");
+                Some(event)
+            } else {
+                None
+            })
+            .next()
+            .is_some()
+        {
+            return Ok(Some(parsed))
+        }
+    }
+
+    Ok(None)
+}
+