extension.js

// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
const vscode = require('vscode')

const emojis = require('./emoji')

// this method is called when your extension is activated
// your extension is activated the very first time the command is executed

/**
 * @param {vscode.ExtensionContext} context
 */
function activate(context) {
  // Use the console to output diagnostic information (console.log) and errors (console.error)
  // This line of code will only be executed once when your extension is activated
  console.log('Congratulations, your extension "emoji-log" is now active!')

  // The command has been defined in the package.json file
  // Now provide the implementation of the command with  registerCommand
  // The commandId parameter must match the command field in package.json
  let disposable = vscode.commands.registerCommand(
    'extension.emoji-log',
    function () {
      const editor = vscode.window.activeTextEditor

      if (editor) {
        const selectionIsEmpty = editor.selection.isEmpty
        editor
          .edit((edit) => {
            const emoji = emojis[Math.floor(Math.random() * emojis.length)]
            if (selectionIsEmpty) {
              edit.insert(
                editor.selection.active,
                `console.log(\'${emoji}\', )`
              )
            } else {
              edit.replace(
                editor.selection,
                `console.log(\'${emoji}\', ${editor.document.getText(
                  editor.selection
                )})`
              )
            }
          })
          .then(() => {
            const cursor = editor.selection.active
            if (selectionIsEmpty) {
              const nextCursor = cursor.with(cursor.line, cursor.character - 1)
              editor.selection = new vscode.Selection(nextCursor, nextCursor)
            } else {
              editor.selection = new vscode.Selection(
                editor.selection.start,
                editor.selection.end
              )
            }
          })
      }
    }
  )

  context.subscriptions.push(disposable)
}
exports.activate = activate

// this method is called when your extension is deactivated
function deactivate() {}

module.exports = {
  activate,
  deactivate,
}