feat(notify): add notify.threshold (#1693)

* feat: configurable notification level

add `notify.threshold` to setup opts

* feat: configurable notification level: add threshold example doc

* feat: configurable notification level: log always comes last

Co-authored-by: Alexander Courtis <alex@courtis.org>

lua/nvim-tree/notify.lua

@@ -0,0 +1,44 @@
+local M = {}
+
+local config = {
+  threshold = vim.log.levels.INFO,
+}
+
+local modes = {
+  { name = "trace", level = vim.log.levels.TRACE },
+  { name = "debug", level = vim.log.levels.DEBUG },
+  { name = "info", level = vim.log.levels.INFO },
+  { name = "warn", level = vim.log.levels.WARN },
+  { name = "error", level = vim.log.levels.ERROR },
+}
+
+do
+  local has_notify, notify_plugin = pcall(require, "notify")
+
+  local dispatch = function(level, msg)
+    if level < config.threshold then
+      return
+    end
+
+    vim.schedule(function()
+      if has_notify and notify_plugin then
+        notify_plugin(msg, level, { title = "NvimTree" })
+      else
+        vim.notify("[NvimTree] " .. msg, level)
+      end
+    end)
+  end
+
+  for _, x in ipairs(modes) do
+    M[x.name] = function(msg, ...)
+      return dispatch(x.level, msg, ...)
+    end
+  end
+end
+
+function M.setup(opts)
+  opts = opts or {}
+  config.threshold = opts.notify.threshold or vim.log.levels.INFO
+end
+
+return M