add list-title subcommand

src/command/list_title.rs

@@ -0,0 +1,11 @@
+pub fn list_title(all: bool) -> Result<(), Box<dyn std::error::Error>> {
+  let titles = crate::use_case::list_title::list_title(all)?;
+  for title in titles {
+    println!(
+      "{}\t{}",
+      title.title.to_string(),
+      if title.obsoleted { "(obsoleted)" } else { "" }
+    );
+  }
+  Ok(())
+}

src/command/mod.rs

@@ -1,4 +1,5 @@
 pub mod edit;
 pub mod list;
+pub mod list_title;
 pub mod new;
 pub mod server;

src/main.rs

@@ -28,6 +28,15 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                         .help("Prints obsoleted memos"),
                 ),
         )
+        .subcommand(
+            clap::SubCommand::with_name("list-title")
+                .about("Lists memo titles")
+                .arg(
+                    clap::Arg::with_name("obsoleted")
+                        .long("obsoleted")
+                        .help("Prints obsoleted memo titles"),
+                ),
+        )
         .subcommand(clap::SubCommand::with_name("new").about("Creates a new memo"))
         .subcommand(clap::SubCommand::with_name("server").about("Runs server"))
         .get_matches();
@@ -41,6 +50,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             let obsoleted = sub_matches.is_present("obsoleted");
             crate::command::list::list(obsoleted)?
         }
+        ("list-title", Some(sub_matches)) => {
+            let obsoleted = sub_matches.is_present("obsoleted");
+            crate::command::list_title::list_title(obsoleted)?
+        }
         ("server", _) => crate::command::server::server()?,
         _ => {}
     }