refactor: commands and add new error handlers

lua/fs/utils/commands.lua

@@ -20,6 +20,8 @@
 ---                        flag to generate another file even if one already
 ---                        exists in the current directory.
 ---
+--- - `:FiveServer install`: Install Five-Server.
+---
 ---NOTE: The commands will only be available after running setup().
 ---
 ---@brief ]]
@@ -51,6 +53,11 @@ M.flags = {
         return
       end
 
+      if flag then
+        logger.logger_warn("Invalid sub flag: " .. flag)
+        return
+      end
+
       process.start()
     end,
   },
@@ -65,14 +72,20 @@ M.flags = {
     ---Stop Job with corresponding ID.
     ---@param id string: The ID of the process to stop.
     execute = function(id)
-      id = tonumber(id) or process.get_path_instance(vim.fn.getcwd())
+      id = id or tostring(process.get_path_instance(vim.fn.getcwd()))
+
+      if not id:match "^%d+$" then
+        logger.logger_warn "Invalid ID format"
+        return
+      end
 
-      if not process.job_exists(id) then
-        logger.logger_warn "Job not found"
+      local num_id = tonumber(id)
+      if not num_id or not process.job_exists(num_id) then
+        logger.logger_warn "Invalid or no instance exists with ID"
         return
       end
 
-      process.stop(id)
+      process.stop(num_id)
     end,
   },
 
@@ -91,16 +104,21 @@ M.flags = {
         return
       end
 
+      if flag then
+        logger.logger_warn("Invalid sub flag: " .. flag)
+        return
+      end
+
       rc.gen_rc()
     end,
   },
 
+  ---Install flag.
   install = {
     execute = function(_)
       require "fs.utils.install"()
-    end
-  }
-
+    end,
+  },
 }
 
 ---Filters flags based on a leading argument.

lua/fs/utils/install.lua

@@ -2,12 +2,12 @@ local config = require "fs.config"
 local logger = require "fs.utils.logger"
 
 local function cmd(command)
-  logger.logger_info("starting installation with: " .. tostring(command[1]))
+  logger.logger_info("Starting installation with: " .. tostring(command[1]))
 
   vim.fn.jobstart(command, {
     on_exit = function(_, code)
       if code ~= 0 then
-        logger.logger_error("error when trying to install with: " .. table.concat(command, " "))
+        logger.logger_error("Error when trying to install with: " .. table.concat(command, " "))
       else
         logger.logger_info "Five Server was installed."
       end