Add functionality to list diaries

bin/domain/imag-diary/Cargo.toml

@@ -26,6 +26,7 @@ chrono = "0.4"
 log = "0.4.0"
 toml = "0.4"
 toml-query = "0.6"
+itertools = "0.7"
 
 libimagerror       = { version = "0.8.0", path = "../../../lib/core/libimagerror" }
 libimagstore       = { version = "0.8.0", path = "../../../lib/core/libimagstore" }

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

@@ -37,6 +37,7 @@ extern crate clap;
 extern crate chrono;
 extern crate toml;
 extern crate toml_query;
+extern crate itertools;
 
 extern crate libimagdiary;
 extern crate libimagentryedit;
@@ -47,9 +48,14 @@ extern crate libimagstore;
 extern crate libimagtimeui;
 extern crate libimagutil;
 
+use std::io::Write;
+
 use libimagrt::setup::generate_runtime_setup;
+use libimagrt::runtime::Runtime;
 use libimagerror::trace::MapErrTrace;
 
+use itertools::Itertools;
+
 mod create;
 mod delete;
 mod edit;
@@ -76,6 +82,7 @@ fn main() {
         .map(|name| {
             debug!("Call {}", name);
             match name {
+                "diaries" => diaries(&rt),
                 "create" => create(&rt),
                 "delete" => delete(&rt),
                 "edit" => edit(&rt),
@@ -92,3 +99,20 @@ fn main() {
         });
 }
 
+fn diaries(rt: &Runtime) {
+    use libimagdiary::diary::Diary;
+    use libimagerror::io::ToExitCode;
+    use libimagerror::exit::ExitUnwrap;
+    use libimagerror::iter::TraceIterator;
+
+    let out         = rt.stdout();
+    let mut outlock = out.lock();
+
+    rt.store()
+        .diary_names()
+        .map_err_trace_exit_unwrap(1)
+        .trace_unwrap_exit(1)
+        .unique()
+        .for_each(|n| writeln!(outlock, "{}", n).to_exit_code().unwrap_or_exit())
+}
+

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

@@ -28,6 +28,10 @@ pub fn build_ui<'a>(app: App<'a, 'a>) -> App<'a, 'a> {
             .required(false)
             .help("Use other than default diary"))
 
+       .subcommand(SubCommand::with_name("diaries")
+                   .about("List all available diaries")
+                   .version("0.1"))
+
         .subcommand(SubCommand::with_name("create")
                    .about("Create a diary entry")
                    .version("0.1")