Implement the 'ls' command for exercises

It was the only part missing for exercises, which was even listed in
-h/--help.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/crates/cli/src/exercises.rs b/crates/cli/src/exercises.rs
index 518f604..39af6c3 100644
--- a/crates/cli/src/exercises.rs
+++ b/crates/cli/src/exercises.rs
@@ -172,6 +172,20 @@ fn edit(mut args: IntoIter<String>) -> i32 {
     }
 }
 
+fn ls(mut args: IntoIter<String>) -> i32 {
+    if args.len() > 1 {
+        help(Some("error: exercises: too many filters"));
+        return 1;
+    }
+
+    let exercises = mihi::select_by_title(args.next()).unwrap_or(vec![]);
+    for exe in exercises {
+        println!("- '{}'", exe);
+    }
+
+    0
+}
+
 fn rm(mut args: IntoIter<String>) -> i32 {
     if args.len() > 1 {
         help(Some("error: exercises: too many filters"));
@@ -232,6 +246,9 @@ pub fn run(args: Vec<String>) {
             "edit" => {
                 std::process::exit(edit(it));
             }
+            "ls" => {
+                std::process::exit(ls(it));
+            }
             "rm" => {
                 std::process::exit(rm(it));
             }
diff --git a/crates/cli/src/main.rs b/crates/cli/src/main.rs
index 62ffd45..871490a 100644
--- a/crates/cli/src/main.rs
+++ b/crates/cli/src/main.rs
@@ -18,6 +18,7 @@ fn help() {
     println!("   -v, --version\tPrint the version of this program.\n");
 
     println!("Commands:");
+    println!("   exercises\t\tManage the exercises for this application.");
     println!("   init\t\t\tInitialize the configuration for this application.");
     println!("   nuke\t\t\tRemove all files from this application and its database.");
     println!("   practice\t\tPractice vocabulary/exercises. Default command if none was given.");