Merge pull request #2089 from overleaf/em-mailchimp-unsubscribe

Handle error on Mailchimp unsubscribe when deleting users

GitOrigin-RevId: 8923480e6d50de45003fd7741610f995753a412b

services/web/app/src/util/promises.js

@@ -0,0 +1,31 @@
+const { promisify } = require('util')
+
+module.exports = { promisifyAll }
+
+/**
+ * Promisify all functions in a module.
+ *
+ * This is meant to be used only when all functions in the module are async
+ * callback-style functions.
+ *
+ * It's very much tailored to our current module structure. In particular, it
+ * binds `this` to the module when calling the function in order not to break
+ * modules that call sibling functions using `this`.
+ *
+ * This will not magically fix all modules. Special cases should be promisified
+ * manually.
+ */
+function promisifyAll(module, opts = {}) {
+  const { without = [] } = opts
+  const promises = {}
+  for (const propName of Object.getOwnPropertyNames(module)) {
+    if (without.includes(propName)) {
+      continue
+    }
+    const propValue = module[propName]
+    if (typeof propValue === 'function') {
+      promises[propName] = promisify(propValue).bind(module)
+    }
+  }
+  return promises
+}