From 6a88d734bdb4660945923c3f4a38c14e45847c2c Mon Sep 17 00:00:00 2001
From: kongjun <kongjun18@outlook.com>
Date: Tue, 29 Apr 2025 03:49:28 +0000
Subject: feat: store passwords in a local scope instead of as a buffer
 variable

---
 README.md               |  5 -----
 lua/encrypt/helpers.lua | 19 ++++++++++++-------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/README.md b/README.md
index ece988b..c140814 100644
--- a/README.md
+++ b/README.md
@@ -35,8 +35,3 @@ tail -n +2 encrypted.txt \
 ```
 
 Or use the provided [decrypt.sh](decrypt.sh)
-
-## TODO
-
-- [ ] Store the password in a local scope in the plugin instead of as a buffer
-      variable.
diff --git a/lua/encrypt/helpers.lua b/lua/encrypt/helpers.lua
index 37a96b3..ff8baef 100644
--- a/lua/encrypt/helpers.lua
+++ b/lua/encrypt/helpers.lua
@@ -1,13 +1,18 @@
----@return string
-local function getPassword()
-  local password = vim.b["password"]
-  if password == nil then
-    password = vim.fn.inputsecret("Enter password: ")
-    vim.b["password"] = password
+---@return function string
+local getPasswordFactory = function()
+  local bufferPasswordMap = {}
+
+  return function()
+    local key = string.format("%s", vim.fn.bufnr())
+    if bufferPasswordMap[key] == nil then
+      password = vim.fn.inputsecret("Enter password: ")
+      bufferPasswordMap[key] = password
+    end
+    return bufferPasswordMap[key]
   end
-  return password
 end
 
+local getPassword = getPasswordFactory()
 local ENCRYPTED_PREFIX = "# <<<encrypted>>>"
 
 return { getPassword = getPassword, ENCRYPTED_PREFIX = ENCRYPTED_PREFIX }
-- 
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