degesch: finish the /help command

1 files changed, 24 insertions, 11 deletions

diff --git a/degesch.c b/degesch.c
index baeb9d0..9bc7b8a 100644
--- a/degesch.c
+++ b/degesch.c
@@ -2893,25 +2893,38 @@ g_command_handlers[] =
 	  "command" },
 };
 
+static void
+show_command_help (struct app_context *ctx,
+	const char *quote, struct command_handler *handler)
+{
+	buffer_send_status (ctx, ctx->global_buffer, "%s%s: %s",
+		quote, handler->name, handler->description);
+	buffer_send_status (ctx, ctx->global_buffer, "%s  Arguments: %s",
+		quote, handler->usage);
+}
+
 static bool
 handle_command_help (struct app_context *ctx, char *arguments)
 {
-	if (*arguments)
+	if (!*arguments)
 	{
-		char *command = cut_word (&arguments);
-		// TODO: search for the command and show specific help
+		buffer_send_status (ctx, ctx->global_buffer, "%s", "");
+		buffer_send_status (ctx, ctx->global_buffer, "Commands:");
+		for (size_t i = 0; i < N_ELEMENTS (g_command_handlers); i++)
+			show_command_help (ctx, "  ", &g_command_handlers[i]);
 		return true;
 	}
 
-	buffer_send_status (ctx, ctx->global_buffer, "Commands:");
+	char *command = cut_word (&arguments);
 	for (size_t i = 0; i < N_ELEMENTS (g_command_handlers); i++)
-	{
-		struct command_handler *iter = &g_command_handlers[i];
-		buffer_send_status (ctx, ctx->global_buffer,
-			"  %s: %s", iter->name, iter->description);
-		buffer_send_status (ctx, ctx->global_buffer,
-			"    Arguments: %s", iter->usage);
-	}
+		if (!strcasecmp_ascii (command, g_command_handlers[i].name))
+		{
+			buffer_send_status (ctx, ctx->global_buffer, "%s", "");
+			show_command_help (ctx, "", &g_command_handlers[i]);
+			return true;
+		}
+	buffer_send_error (ctx, ctx->global_buffer,
+		"%s: %s", "No such command", command);
 	return true;
 }