docs/refactor: add AI disclosure and clean up code style

README.md

@@ -53,3 +53,10 @@ Place a `.jasper_config.json` file at the root of the project (next to `.git`):
 4. The timer is **started**. A libuv countdown is armed; after `inactivity_timeout` minutes of silence the timer is **paused**.
 5. Any cursor movement or keystroke resets the countdown (and resumes the timer if it was paused).
 6. On `VimLeave` the timer is **stopped**.
+
+$
+## AI Disclosure
+
+This project was written entirely with the assistance of
+[GitHub Copilot](https://github.com/features/copilot) using the
+**Claude Sonnet 4.6** model.

lua/jasper/api.lua

@@ -12,9 +12,6 @@ local JASPER_URL = "https://jasper.4sigma.it"
 --- @return string|nil error message
 local function curl(args)
   -- Append -w to get the HTTP status on a separate last line
-  local full_args = vim.list_extend(vim.list_slice(args, 1), { "-s", "-w", "\n%{http_code}" })
-  -- args already contains the URL; rebuild properly:
-  -- Actually we receive the full arg list already.  Add -w trick.
   table.insert(args, "-w")
   table.insert(args, "\n%{http_code}")
 
@@ -41,7 +38,8 @@ end
 local function get(path, token)
   return curl({
     "curl",
-    "-H", "Authorization: Token " .. token,
+    "-H",
+    "Authorization: Token " .. token,
     JASPER_URL .. path,
   })
 end
@@ -52,8 +50,11 @@ end
 --- @return table|nil, number, string|nil
 local function post(path, token, form)
   local args = {
-    "curl", "-X", "POST",
-    "-H", "Authorization: Token " .. token,
+    "curl",
+    "-X",
+    "POST",
+    "-H",
+    "Authorization: Token " .. token,
   }
   if form then
     for k, v in pairs(form) do
@@ -84,6 +85,9 @@ function M.get_timers(token)
   if status ~= 200 then
     return nil, "unexpected HTTP status " .. status
   end
+  if not data then
+    return nil, "empty response"
+  end
   local timers_dict = data.data and data.data.timers
   if type(timers_dict) ~= "table" then
     return nil, "unexpected response shape"
@@ -108,6 +112,9 @@ function M.start_timer(token, timer_id)
   if status ~= 200 then
     return false, "HTTP " .. status
   end
+  if not data then
+    return true, nil
+  end
   if data.error ~= nil and data.error ~= vim.NIL then
     return false, tostring(data.error)
   end
@@ -127,6 +134,9 @@ function M.stop_timer(token, timer_id)
   if status ~= 200 then
     return false, "HTTP " .. status
   end
+  if not data then
+    return true, nil
+  end
   if data.error ~= nil and data.error ~= vim.NIL then
     return false, tostring(data.error)
   end
@@ -140,17 +150,16 @@ end
 --- @return boolean ok
 --- @return string|nil error
 function M.create_timer(token, timer_id, attivita_id)
-  local data, status, err = post(
-    "/api/v1/timer/" .. timer_id .. "/attivita/",
-    token,
-    { attivita_id = attivita_id }
-  )
+  local data, status, err = post("/api/v1/timer/" .. timer_id .. "/attivita/", token, { attivita_id = attivita_id })
   if err then
     return false, err
   end
   if status ~= 200 then
     return false, "HTTP " .. status
   end
+  if not data then
+    return true, nil
+  end
   if data.error ~= nil and data.error ~= vim.NIL then
     return false, tostring(data.error)
   end

lua/jasper/auth.lua

@@ -47,9 +47,12 @@ end
 --- @return string|nil error message
 function M.login(username, password)
   local result = vim.system({
-    "curl", "-s",
-    "--data-urlencode", "username=" .. username,
-    "--data-urlencode", "password=" .. password,
+    "curl",
+    "-s",
+    "--data-urlencode",
+    "username=" .. username,
+    "--data-urlencode",
+    "password=" .. password,
     JASPER_URL .. "/api/v1/token/login/",
   }, { text = true }):wait()
 

lua/jasper/init.lua

@@ -4,7 +4,7 @@
 local M = {}
 
 local config = require("jasper.config")
-local timer  = require("jasper.timer")
+local timer = require("jasper.timer")
 
 --- Setup the plugin.
 ---
@@ -36,19 +36,14 @@ function M.setup(opts)
       end
 
       if not project_cfg.attivita_id then
-        vim.notify(
-          "[Jasper] .jasper_config.json found but 'attivita_id' is missing",
-          vim.log.levels.WARN
-        )
+        vim.notify("[Jasper] .jasper_config.json found but 'attivita_id' is missing", vim.log.levels.WARN)
         return
       end
 
       -- Merge: project file values < global setup() opts (global opts take priority)
       local effective_opts = {
         attivita_id = project_cfg.attivita_id,
-        inactivity_timeout = opts.inactivity_timeout
-          or project_cfg.inactivity_timeout
-          or 10,
+        inactivity_timeout = opts.inactivity_timeout or project_cfg.inactivity_timeout or 10,
       }
 
       timer.setup(effective_opts)

lua/jasper/timer.lua

@@ -3,19 +3,19 @@
 
 local M = {}
 
-local api  = require("jasper.api")
+local api = require("jasper.api")
 local auth = require("jasper.auth")
 
 --- Internal state (one instance per Neovim session).
 local state = {
-  token        = nil,   ---@type string|nil
-  timer_id     = nil,   ---@type number|nil
-  attivita_id  = nil,   ---@type number|nil
-  running      = false,
+  token = nil, ---@type string|nil
+  timer_id = nil, ---@type number|nil
+  attivita_id = nil, ---@type number|nil
+  running = false,
   -- inactivity_ms: milliseconds of silence before the timer is auto-paused
   inactivity_ms = 10 * 60 * 1000,
-  uv_timer      = nil,  ---@type uv_timer_t|nil
-  augroup       = nil,  ---@type number|nil
+  uv_timer = nil, ---@type uv.uv_timer_t|nil
+  augroup = nil, ---@type number|nil
 }
 
 -- ---------------------------------------------------------------------------
@@ -128,7 +128,7 @@ end
 --- @param token string
 --- @param timer_id number
 local function begin_tracking(token, timer_id)
-  state.token    = token
+  state.token = token
   state.timer_id = timer_id
 
   -- Create the libuv timer used for inactivity detection
@@ -170,6 +170,11 @@ local function on_token_ready(token)
     return
   end
 
+  if not timers then
+    notify("Cannot fetch timers: empty response", vim.log.levels.ERROR)
+    return
+  end
+
   local timer_id, terr = find_or_create_timer(token, state.attivita_id, timers)
   if not timer_id then
     notify(terr or "Cannot get timer", vim.log.levels.ERROR)
@@ -182,7 +187,7 @@ end
 --- Entry point called on VimEnter.
 --- @param opts table  { attivita_id, inactivity_timeout }
 function M.setup(opts)
-  state.attivita_id  = opts.attivita_id
+  state.attivita_id = opts.attivita_id
   state.inactivity_ms = (opts.inactivity_timeout or 10) * 60 * 1000
 
   local token = auth.get_token()