6 files changed, 248 insertions, 0 deletions
diff --git a/lua/simple-denote/api.lua b/lua/simple-denote/api.lua
new file mode 100644
index 0000000..f835b7b
--- /dev/null
+++ b/lua/simple-denote/api.lua
@@ -0,0 +1,57 @@
+local M = {}
+
+local internal = require("simple-denote.internal")
+local util = require("simple-denote.util")
+
+---@param options table
+---@param name string|nil
+---@param tags table|nil
+function M.note(options, name, tags)
+  if not name then
+    vim.ui.input({ prompt = "Note title: " }, function(input)
+      name = input
+    end)
+  end
+  if not tags then
+    vim.ui.input({ prompt = "Tags: " }, function(input)
+      if input ~= "" and input then
+        tags = util.splitspace(input)
+      end
+    end)
+  end
+  internal.note(options, name, tags)
+end
+
+---@param options table
+---@param filename string|nil
+---@param new_title string|nil
+function M.retitle(options, filename, new_title)
+  if not filename then
+    filename = vim.fn.expand("%")
+  end
+  if not new_title then
+    vim.ui.input({ prompt = "New title: " }, function(input)
+      new_title = input
+    end)
+  end
+  internal.retitle(options, filename, new_title)
+end
+
+---@param options table
+---@param filename string|nil
+---@param new_tags table|nil
+function M.retag(options, filename, new_tags)
+  if not filename then
+    filename = vim.fn.expand("%")
+  end
+  if not new_tags then
+    vim.ui.input({ prompt = "New tags: " }, function(input)
+      if input ~= "" and input then
+        new_tags = util.splitspace(input)
+      end
+    end)
+  end
+  internal.retag(options, filename, new_tags)
+end
+
+return M
diff --git a/lua/simple-denote/cmd.lua b/lua/simple-denote/cmd.lua
new file mode 100644
index 0000000..177db88
--- /dev/null
+++ b/lua/simple-denote/cmd.lua
@@ -0,0 +1,26 @@
+local M = {
+  commands = { "note", "retitle", "retag" },
+}
+
+local api = require("simple-denote.api")
+
+function M.load_cmd(options)
+  vim.api.nvim_create_user_command("Denote", function(opts)
+    if opts.fargs[1] == "note" then
+      api.note(options)
+    elseif opts.fargs[1] == "retitle" then
+      api.retitle(options)
+    elseif opts.fargs[1] == "retag" then
+      api.retag(options)
+    else
+      error("Unsupported operation " .. opts.fargs[1])
+    end
+  end, {
+    nargs = 1,
+    complete = function()
+      return M.commands
+    end,
+  })
+end
+
+return M
diff --git a/lua/simple-denote/config.lua b/lua/simple-denote/config.lua
new file mode 100644
index 0000000..e41c0a9
--- /dev/null
+++ b/lua/simple-denote/config.lua
@@ -0,0 +1,12 @@
+local M = {}
+
+M.defaults = {
+  ext = "md",
+  dir = "~/notes/",
+  add_heading = true,
+  retitle_heading = true,
+}
+
+M.options = M.defaults
+
+return M
diff --git a/lua/simple-denote/init.lua b/lua/simple-denote/init.lua
new file mode 100644
index 0000000..0d8654d
--- /dev/null
+++ b/lua/simple-denote/init.lua
@@ -0,0 +1,15 @@
+local M = {}
+
+local cmd = require("simple-denote.cmd")
+local config = require("simple-denote.config")
+
+---@param options? table user configuration
+function M.setup(options)
+  config.options = vim.tbl_deep_extend("force", config.defaults, options or {})
+  if config.options.dir:sub(-1) ~= "/" then
+    config.options.dir = config.options.dir .. "/"
+  end
+  cmd.load_cmd(config.options)
+end
+
+return M
diff --git a/lua/simple-denote/internal.lua b/lua/simple-denote/internal.lua
new file mode 100644
index 0000000..d3c3987
--- /dev/null
+++ b/lua/simple-denote/internal.lua
@@ -0,0 +1,106 @@
+local M = {}
+
+---@param options table
+---@param name string
+---@param tags table|nil
+--- Opens your note
+function M.note(options, name, tags)
+  local path = options.dir
+  local file = ""
+  local date = os.date("%Y%m%dT%H%M%S")
+  local tags_str = ""
+  local og_name = name
+  name = name:gsub("^%s*(.-)%s*$", "%1")
+  name = name:gsub("[^%w%s]","")
+  name = name:gsub("%s","-")
+  if tags then
+    for i, tag in pairs(tags) do
+      tag = tag:gsub("[^%w%s]","")
+      tags_str = tags_str .. tag
+      if i < #tags then
+        tags_str = tags_str .. "_"
+      end
+    end
+  end
+  file = date .. "--" .. name:lower()
+  if tags_str ~= "" then
+    file = file .. "__" .. tags_str:lower()
+  end
+  path = path .. file .. "." .. options.ext
+  vim.cmd("e " .. path)
+  if options.add_heading then
+    prefix = ""
+    if options.ext == "md" then
+      prefix = "# "
+    elseif options.ext == "org" or options.ext == "norg" then
+      prefix = "* "
+    end
+    vim.api.nvim_buf_set_lines(0, 0, 1, false, {prefix .. og_name})
+    vim.cmd("norm! o")
+  end
+  vim.cmd("startinsert")
+end
+
+---@param options table
+---@param filename string
+---@param new_title string
+--- Retitles the filename and changes the first heading of the note
+function M.retitle(options, filename, new_title)
+  local new_filename = filename:match("^(.*%d%d%d%d%d%d%d%dT%d%d%d%d%d%d).*")
+  local tags = filename:match(".*(__.*)%..*")
+  if new_filename == nil then
+    error("This file doesn't look like it has a Denote-style name")
+  end
+  new_title = new_title:gsub("^%s*(.-)%s*$", "%1") -- Trim whitespace
+
+  -- Replace first line with new heading
+  if options.retitle_heading and new_title ~= "" then
+    local first_char = vim.api.nvim_buf_get_lines(0, 0, 1, false)[1]:sub(1, 1)
+    if (first_char == "#" and options.ext == "md") or 
+       (first_char == "*" and (options.ext == "org" or options.ext == "norg")) then
+      vim.api.nvim_buf_set_lines(0, 0, 1, false, {first_char .. " " .. new_title})
+    end
+  end
+  new_title = new_title:lower()
+  new_title = new_title:gsub("[^%w%s]","")
+  new_title = new_title:gsub("%s","-")
+  if new_title ~= "" then
+    new_title = "--" .. new_title
+  end
+  new_filename = new_filename .. new_title .. (tags or "") .. "." .. options.ext
+  if filename ~= new_filename then
+    vim.cmd('saveas ' .. new_filename)
+    vim.cmd('silent !rm ' .. filename)
+  end
+end
+
+---@param options table
+---@param filename string
+---@param new_tags table
+---Replaces the tags in filename with the tags in new_tags
+function M.retag(options, filename, new_tags)
+  local tags_str = ""
+  local new_filename = filename:match("^(.*)__.*$")
+  if new_filename == nil then
+    new_filename = filename:match("^(.*)%..*$")
+  end
+  if new_tags then
+    for i, tag in pairs(new_tags) do
+      tag = tag:gsub("[^%w%s]","")
+      tags_str = tags_str .. tag
+      if i < #new_tags then
+        tags_str = tags_str .. "_"
+      end
+    end
+  end
+  if tags_str ~= "" then
+    new_filename = new_filename .. "__" .. tags_str:lower()
+  end
+  new_filename = new_filename .. "." .. options.ext
+  if filename ~= new_filename then
+    vim.cmd('saveas ' .. new_filename)
+    vim.cmd('silent !rm ' .. filename)
+  end
+end
+
+return M
diff --git a/lua/simple-denote/util.lua b/lua/simple-denote/util.lua
new file mode 100644
index 0000000..643e2e7
--- /dev/null
+++ b/lua/simple-denote/util.lua
@@ -0,0 +1,32 @@
+local M = {}
+
+
+function M.splitspace(str)
+  local chunks = {}
+  for substring in str:gmatch("%S+") do
+    table.insert(chunks, #chunks, substring)
+  end
+  return chunks
+end
+
+function M.splitstring(str, delim)
+  local items = {}
+  local fulldelim = nil
+  if delim == "." or delim == "-" then
+    fulldelim = "%" .. delim
+  else
+    fulldelim = delim
+  end
+  str = str .. delim
+  for w in str:gmatch("(.-)" .. fulldelim) do
+    items[#items + 1] = w
+  end
+  return items
+end
+
+--- Escape a string to use as a lua pattern
+function M.escape(str)
+    return str:gsub("(%W)", "%%%1")
+end
+
+return M