Add/Show/Delete Emojis on Notes (#181)

This MR adds the ability to view, add, and delete emojis from notes and comments.

This action can be performed by default with the `Ea` (emoji add) keybinding, and the `Ed` (emoji delete) keybinding. Only emojis added by the current user are eligible for deletion. The MR also implements a popup functionality which shows the user who added emojis on hover.

Implements #179

lua/gitlab/emoji.lua

@@ -0,0 +1,140 @@
+local u = require("gitlab.utils")
+local state = require("gitlab.state")
+
+local M = {
+  ---@type EmojiMap|nil
+  emoji_map = {},
+  ---@type Emoji[]
+  emoji_list = {},
+}
+
+M.init = function()
+  local bin_path = state.settings.bin_path
+  local emoji_path = bin_path
+    .. state.settings.file_separator
+    .. "config"
+    .. state.settings.file_separator
+    .. "emojis.json"
+  local emojis = u.read_file(emoji_path)
+  if emojis == nil then
+    u.notify("Could not read emoji file at " .. emoji_path, vim.log.levels.WARN)
+  end
+
+  local data_ok, data = pcall(vim.json.decode, emojis)
+  if not data_ok then
+    u.notify("Could not parse emoji file at " .. emoji_path, vim.log.levels.WARN)
+  end
+
+  M.emoji_map = data
+  M.emoji_list = {}
+  for _, v in pairs(M.emoji_map) do
+    table.insert(M.emoji_list, v)
+  end
+end
+
+-- Define the popup window options
+M.popup_opts = {
+  relative = "cursor",
+  row = -2,
+  col = 0,
+  width = 2, -- Width set dynamically later
+  height = 1,
+  style = "minimal",
+  border = "single",
+}
+
+M.show_popup = function(char)
+  -- Close existing popup if it's open
+  if M.popup_win_id and vim.api.nvim_win_is_valid(M.popup_win_id) then
+    vim.api.nvim_win_close(M.popup_win_id, true)
+  end
+
+  -- Create a buffer for the popup window
+  local buf = vim.api.nvim_create_buf(false, true)
+
+  -- Set the content of the popup buffer to the character
+  vim.api.nvim_buf_set_lines(buf, 0, -1, false, { char })
+
+  -- Open the popup window and store its ID
+  M.popup_win_id = vim.api.nvim_open_win(buf, false, M.popup_opts)
+end
+
+M.close_popup = function()
+  if M.popup_win_id and vim.api.nvim_win_is_valid(M.popup_win_id) then
+    vim.api.nvim_win_close(M.popup_win_id, true)
+    M.popup_win_id = nil -- Reset the window ID
+  end
+end
+
+M.init_popup = function(tree, bufnr)
+  vim.api.nvim_create_autocmd({ "CursorHold" }, {
+    callback = function()
+      local node = tree:get_node()
+      if node == nil then
+        return
+      end
+
+      local note_node = require("gitlab.actions.discussions").get_note_node(tree, node)
+      local root_node = require("gitlab.actions.discussions").get_root_node(tree, node)
+      local note_id_str = tostring(note_node.is_root and root_node.root_note_id or note_node.id)
+
+      local emojis = require("gitlab.actions.discussions").emojis
+      local note_emojis = emojis[note_id_str]
+      if note_emojis == nil then
+        return
+      end
+
+      local cursor_pos = vim.api.nvim_win_get_cursor(0)
+      vim.api.nvim_command('normal! "zyiw')
+      vim.api.nvim_win_set_cursor(0, cursor_pos)
+      local word = vim.fn.getreg("z")
+
+      for k, v in pairs(M.emoji_map) do
+        if v.moji == word then
+          local names = M.get_users_who_reacted_with_emoji(k, note_emojis)
+          M.popup_opts.width = string.len(names)
+          if M.popup_opts.width > 0 then
+            M.show_popup(names)
+          end
+        end
+      end
+    end,
+    buffer = bufnr,
+  })
+
+  vim.api.nvim_create_autocmd({ "CursorMoved", "CursorMovedI" }, {
+    callback = function()
+      M.close_popup()
+    end,
+    buffer = bufnr,
+  })
+end
+
+---@param name string
+---@return string
+M.get_users_who_reacted_with_emoji = function(name, note_emojis)
+  local result = ""
+  for _, v in pairs(note_emojis) do
+    if v.name == name then
+      result = result .. v.user.name .. ", "
+    end
+  end
+  return string.len(result) > 3 and result:sub(1, -3) or result
+end
+
+M.pick_emoji = function(options, cb)
+  vim.ui.select(options, {
+    prompt = "Choose emoji",
+    format_item = function(val)
+      return string.format("%s %s", val.moji, val.name)
+    end,
+  }, function(choice)
+    if not choice then
+      return
+    end
+    local name = choice.shortname:sub(2, -2)
+    cb(name, choice)
+  end)
+end
+
+return M