feat: emit User autocmd events in addition to hooks (#33)

* feat: emit `ResssionLoadPost` User event on loading a session

* feat: emit `User` autocmd for more functions

* docs: update docs

* feat: emit `User` autocommands on hook dispatch

* feat: add `post_detach` hook and autocmd

* docs: update docs

* feat: include data in detach event payload

* feat: add additional options to detach method

* refactor: use `remove_tabpage_session` to remove tabpage sessions

* docs: add `target_tabpage` parameter

* fix: always clear tab session when leaving tab

* Revert "refactor: use `remove_tabpage_session` to remove tabpage sessions"

This reverts commit 1747ca2.

* fix: issues with retrieving name in tab_sessions

* docs: fix types

* Revert "fix: always clear tab session when leaving tab"

This reverts commit 4581337.

* throw errors if no session is found to detach from

* add `hook_to_event` mapping and check `has_setup` before applying event hooks

* remove unecessary delay parameter for `event` function

* move detach hook into separate pr

* remove hardcoded "Resession" prefix from `event` util method

lua/resession/init.lua

@@ -20,13 +20,27 @@ local hooks = setmetatable({
     error(string.format('Unrecognized hook "%s"', key))
   end,
 })
+local hook_to_event = {
+  pre_load = "ResessionLoadPre",
+  post_load = "ResessionLoadPost",
+  pre_save = "ResessionSavePre",
+  post_save = "ResessionSavePost",
+}
 
 local function do_setup()
   if pending_config then
     local conf = pending_config
     pending_config = nil
     require("resession.config").setup(conf)
-    has_setup = true
+
+    if not has_setup then
+      for hook, _ in pairs(hooks) do
+        M.add_hook(hook, function()
+          require("resession.util").event(hook_to_event[hook])
+        end)
+      end
+      has_setup = true
+    end
   end
 end
 

lua/resession/util.lua

@@ -168,4 +168,13 @@ M.shorten_path = function(path)
   end
 end
 
+--- Trigger a `User` event
+---@param event string The event name to be emitted
+M.event = function(event)
+  local emit_event = function()
+    vim.api.nvim_exec_autocmds("User", { pattern = event, modeline = false })
+  end
+  vim.schedule(emit_event)
+end
+
 return M