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src/main/squirrel-win32.js

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+module.exports = {
+  handleEvent
+}
+
+var cp = require('child_process')
+var electron = require('electron')
+var fs = require('fs')
+var os = require('os')
+var path = require('path')
+
+var app = electron.app
+
+var handlers = require('./handlers')
+
+var EXE_NAME = path.basename(process.execPath)
+var UPDATE_EXE = path.join(process.execPath, '..', '..', 'Update.exe')
+
+function handleEvent (cmd) {
+  if (cmd === '--squirrel-install') {
+    // App was installed. Install desktop/start menu shortcuts.
+    createShortcuts(function () {
+      // Ensure user sees install splash screen so they realize that Setup.exe actually
+      // installed an application and isn't the application itself.
+      setTimeout(function () {
+        app.quit()
+      }, 3000)
+    })
+    return true
+  }
+
+  if (cmd === '--squirrel-updated') {
+    // App was updated. (Called on new version of app)
+    updateShortcuts(function () {
+      app.quit()
+    })
+    return true
+  }
+
+  if (cmd === '--squirrel-uninstall') {
+    // App was just uninstalled. Undo anything we did in the --squirrel-install and
+    // --squirrel-updated handlers
+
+    // Uninstall .torrent file and magnet link handlers
+    handlers.uninstall()
+
+    // Remove desktop/start menu shortcuts.
+    // HACK: add a callback to handlers.uninstall() so we can remove this setTimeout
+    setTimeout(function () {
+      removeShortcuts(function () {
+        app.quit()
+      })
+    }, 1000)
+
+    return true
+  }
+
+  if (cmd === '--squirrel-obsolete') {
+    // App will be updated. (Called on outgoing version of app)
+    app.quit()
+    return true
+  }
+
+  if (cmd === '--squirrel-firstrun') {
+    // App is running for the first time. Do not quit, allow startup to continue.
+    return false
+  }
+
+  return false
+}
+
+/**
+ * Spawn a command and invoke the callback when it completes with an error and
+ * the output from standard out.
+ */
+function spawn (command, args, cb) {
+  var stdout = ''
+
+  var child
+  try {
+    child = cp.spawn(command, args)
+  } catch (err) {
+    // Spawn can throw an error
+    process.nextTick(function () {
+      cb(error, stdout)
+    })
+    return
+  }
+
+  child.stdout.on('data', function (data) {
+    stdout += data
+  })
+
+  var error = null
+  child.on('error', function (processError) {
+    error = processError
+  })
+  child.on('close', function (code, signal) {
+    if (code !== 0 && !error) error = new Error('Command failed: #{signal || code}')
+    if (error) error.stdout = stdout
+    cb(error, stdout)
+  })
+}
+
+/**
+ * Spawn the Squirrel `Update.exe` command with the given arguments and invoke
+ * the callback when the command completes.
+ */
+function spawnUpdate (args, cb) {
+  spawn(UPDATE_EXE, args, cb)
+}
+
+/**
+ * Create desktop and start menu shortcuts using the Squirrel `Update.exe`
+ * command.
+ */
+function createShortcuts (cb) {
+  spawnUpdate(['--createShortcut', EXE_NAME], cb)
+}
+
+/**
+ * Update desktop and start menu shortcuts using the Squirrel `Update.exe`
+ * command.
+ */
+function updateShortcuts (cb) {
+  var homeDir = os.homedir()
+  if (homeDir) {
+    var desktopShortcutPath = path.join(homeDir, 'Desktop', 'WebTorrent.lnk')
+    // If the desktop shortcut was deleted by the user, then keep it deleted.
+    fs.access(desktopShortcutPath, function (err) {
+      var desktopShortcutExists = !err
+      createShortcuts(function () {
+        if (desktopShortcutExists) {
+          cb()
+        } else {
+          // Remove the unwanted desktop shortcut that was recreated
+          fs.unlink(desktopShortcutPath, cb)
+        }
+      })
+    })
+  } else {
+    createShortcuts(cb)
+  }
+}
+
+/**
+ * Remove desktop and start menu shortcuts using the Squirrel `Update.exe`
+ * command.
+ */
+function removeShortcuts (cb) {
+  spawnUpdate(['--removeShortcut', EXE_NAME], cb)
+}