refactor(history): use XDG_DATA_STATE as source dir (#209)

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>

lua/avante/config.lua

@@ -79,6 +79,9 @@ M.defaults = {
     auto_set_highlight_group = true,
     auto_apply_diff_after_generation = false,
   },
+  history = {
+    storage_path = vim.fn.stdpath("state") .. "/avante",
+  },
   highlights = {
     ---@type AvanteConflictHighlights
     diff = {

lua/avante/history.lua

@@ -0,0 +1,49 @@
+local fn, api = vim.fn, vim.api
+local Path = require("plenary.path")
+local Config = require("avante.config")
+
+local M = {}
+
+local H = {}
+
+---@param bufnr integer
+---@return string
+H.filename = function(bufnr)
+  local code_buf_name = api.nvim_buf_get_name(bufnr)
+  -- Replace path separators with double underscores
+  local path_with_separators = fn.substitute(code_buf_name, "/", "__", "g")
+  -- Replace other non-alphanumeric characters with single underscores
+  return fn.substitute(path_with_separators, "[^A-Za-z0-9._]", "_", "g") .. ".json"
+end
+
+---@param bufnr integer
+---@return Path
+M.get = function(bufnr)
+  return Path:new(Config.history.storage_path):joinpath(H.filename(bufnr))
+end
+
+---@param bufnr integer
+M.load = function(bufnr)
+  local history_file = M.get(bufnr)
+  if history_file:exists() then
+    local content = history_file:read()
+    return content ~= nil and vim.json.decode(content) or {}
+  end
+  return {}
+end
+
+---@param bufnr integer
+---@param history table
+M.save = function(bufnr, history)
+  local history_file = M.get(bufnr)
+  history_file:write(vim.json.encode(history), "w")
+end
+
+M.setup = function()
+  local history_dir = Path:new(Config.history.storage_path)
+  if not history_dir:exists() then
+    history_dir:mkdir({ parents = true })
+  end
+end
+
+return M

lua/avante/init.lua

@@ -225,6 +225,7 @@ function M.setup(opts)
     return
   end
 
+  require("avante.history").setup()
   require("avante.highlights").setup()
   require("avante.diff").setup()
   require("avante.providers").setup()

lua/avante/sidebar.lua

@@ -1,10 +1,10 @@
 local api = vim.api
 local fn = vim.fn
 
-local Path = require("plenary.path")
 local Split = require("nui.split")
 local event = require("nui.utils.autocmd").event
 
+local History = require("avante.history")
 local Config = require("avante.config")
 local Diff = require("avante.diff")
 local Llm = require("avante.llm")
@@ -927,32 +927,6 @@ local function prepend_line_number(content, start_line)
   return table.concat(result, "\n")
 end
 
--- Function to get the current project root directory
-local function get_project_root()
-  local current_file = fn.expand("%:p")
-  local current_dir = fn.fnamemodify(current_file, ":h")
-  local git_root = vim.fs.root(current_file, { ".git" })
-  return git_root ~= nil and git_root or current_dir
-end
-
----@param sidebar avante.Sidebar
-local function get_chat_history_filename(sidebar)
-  local code_buf_name = api.nvim_buf_get_name(sidebar.code.bufnr)
-  local relative_path = fn.fnamemodify(code_buf_name, ":~:.")
-  -- Replace path separators with double underscores
-  local path_with_separators = fn.substitute(relative_path, "/", "__", "g")
-  -- Replace other non-alphanumeric characters with single underscores
-  return fn.substitute(path_with_separators, "[^A-Za-z0-9._]", "_", "g")
-end
-
--- Function to get the chat history file path
-local function get_chat_history_file(sidebar)
-  local project_root = get_project_root()
-  local filename = get_chat_history_filename(sidebar)
-  local history_dir = Path:new(project_root, ".avante_chat_history")
-  return history_dir:joinpath(filename .. ".json")
-end
-
 -- Function to get current timestamp
 local function get_timestamp()
   return os.date("%Y-%m-%d %H:%M:%S")
@@ -973,29 +947,6 @@ local function get_chat_record_prefix(timestamp, provider, model, request)
     .. "\n\n"
 end
 
--- Function to load chat history
-local function load_chat_history(sidebar)
-  local history_file = get_chat_history_file(sidebar)
-  if history_file:exists() then
-    local content = history_file:read()
-    return fn.json_decode(content)
-  end
-  return {}
-end
-
--- Function to save chat history
-local function save_chat_history(sidebar, history)
-  local history_file = get_chat_history_file(sidebar)
-  local history_dir = history_file:parent()
-
-  -- Create the directory if it doesn't exist
-  if not history_dir:exists() then
-    history_dir:mkdir({ parents = true })
-  end
-
-  history_file:write(fn.json_encode(history), "w")
-end
-
 function Sidebar:update_content_with_history(history)
   local content = ""
   for idx, entry in ipairs(history) do
@@ -1082,7 +1033,7 @@ function Sidebar:get_commands()
     end,
     clear = function(args, cb)
       local chat_history = {}
-      save_chat_history(self, chat_history)
+      History.save(self.code.bufnr, chat_history)
       self:update_content("Chat history cleared", { focus = false, scroll = false })
       vim.defer_fn(function()
         self:close()
@@ -1159,7 +1110,7 @@ function Sidebar:create_input()
     self.input:unmount()
   end
 
-  local chat_history = load_chat_history(self)
+  local chat_history = History.load(self.code.bufnr)
 
   ---@param request string
   local function handle_submit(request)
@@ -1276,7 +1227,7 @@ function Sidebar:create_input()
         request = request,
         response = full_response,
       })
-      save_chat_history(self, chat_history)
+      History.save(self.code.bufnr, chat_history)
     end
 
     Llm.stream(
@@ -1476,7 +1427,7 @@ function Sidebar:create_floating_window_for_split(opts)
 end
 
 function Sidebar:render()
-  local chat_history = load_chat_history(self)
+  local chat_history = History.load(self.code.bufnr)
 
   local sidebar_height = api.nvim_win_get_height(self.code.winid)
   local selected_code_size = self:get_selected_code_size()