From 734fb891c2969502593735cb866f22b72e8d214a Mon Sep 17 00:00:00 2001
From: David Arnold <david.arnold@iohk.io>
Date: Mon, 4 Sep 2023 20:38:12 +0200
Subject: [PATCH] chore: monkey patching {imap,pop}lib is no more necessary
 since 4 years

see: https://github.com/python/cpython/commit/13a7ee8d62dafe7d2291708312fa2a86e171c7fa
---
 .../doctype/email_domain/email_domain.py      |  7 ++-
 frappe/email/receive.py                       | 56 ++-----------------
 2 files changed, 10 insertions(+), 53 deletions(-)

diff --git a/frappe/email/doctype/email_domain/email_domain.py b/frappe/email/doctype/email_domain/email_domain.py
index 69a8701dbe..5b9f38615a 100644
--- a/frappe/email/doctype/email_domain/email_domain.py
+++ b/frappe/email/doctype/email_domain/email_domain.py
@@ -1,12 +1,13 @@
 # Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and contributors
 # License: MIT. See LICENSE
 
+import imaplib
+import poplib
 import smtplib
 from functools import wraps
 
 import frappe
 from frappe import _
-from frappe.email.receive import Timed_IMAP4, Timed_IMAP4_SSL, Timed_POP3, Timed_POP3_SSL
 from frappe.email.utils import get_port
 from frappe.model.document import Document
 from frappe.utils import cint
@@ -101,9 +102,9 @@ class EmailDomain(Document):
 		self.incoming_port = get_port(self)
 
 		if self.use_imap:
-			conn_method = Timed_IMAP4_SSL if self.use_ssl else Timed_IMAP4
+			conn_method = imaplib.IMAP4_SSL if self.use_ssl else imaplib.IMAP4
 		else:
-			conn_method = Timed_POP3_SSL if self.use_ssl else Timed_POP3
+			conn_method = poplib.POP3_SSL if self.use_ssl else poplib.POP3
 
 		self.use_starttls = cint(self.use_imap and self.use_starttls and not self.use_ssl)
 		incoming_conn = conn_method(self.email_server, port=self.incoming_port)
diff --git a/frappe/email/receive.py b/frappe/email/receive.py
index 6af6c3cebe..39a5537ebf 100644
--- a/frappe/email/receive.py
+++ b/frappe/email/receive.py
@@ -49,10 +49,6 @@ class EmailSizeExceededError(frappe.ValidationError):
 	pass
 
 
-class EmailTimeoutError(frappe.ValidationError):
-	pass
-
-
 class LoginLimitExceeded(frappe.ValidationError):
 	pass
 
@@ -75,11 +71,11 @@ class EmailServer:
 		"""Connect to IMAP"""
 		try:
 			if cint(self.settings.use_ssl):
-				self.imap = Timed_IMAP4_SSL(
+				self.imap = imaplib.IMAP4_SSL(
 					self.settings.host, self.settings.incoming_port, timeout=frappe.conf.get("pop_timeout")
 				)
 			else:
-				self.imap = Timed_IMAP4(
+				self.imap = imaplib.IMAP4(
 					self.settings.host, self.settings.incoming_port, timeout=frappe.conf.get("pop_timeout")
 				)
 
@@ -109,11 +105,11 @@ class EmailServer:
 		# this method return pop connection
 		try:
 			if cint(self.settings.use_ssl):
-				self.pop = Timed_POP3_SSL(
+				self.pop = poplib.POP3_SSL(
 					self.settings.host, self.settings.incoming_port, timeout=frappe.conf.get("pop_timeout")
 				)
 			else:
-				self.pop = Timed_POP3(
+				self.pop = poplib.POP3(
 					self.settings.host, self.settings.incoming_port, timeout=frappe.conf.get("pop_timeout")
 				)
 
@@ -170,7 +166,7 @@ class EmailServer:
 		for i, uid in enumerate(email_list[:100]):
 			try:
 				self.retrieve_message(uid, i + 1)
-			except (EmailTimeoutError, LoginLimitExceeded):
+			except (_socket.timeout, LoginLimitExceeded):
 				# get whatever messages were retrieved
 				break
 
@@ -263,7 +259,7 @@ class EmailServer:
 			else:
 				msg = self.pop.retr(msg_num)
 				self.latest_messages.append(b"\n".join(msg[1]))
-		except EmailTimeoutError:
+		except _socket.timeout:
 			# propagate this error to break the loop
 			raise
 
@@ -900,43 +896,3 @@ class InboundMail(Email):
 			"has_attachment": 1 if self.attachments else 0,
 			"seen": self.seen_status or 0,
 		}
-
-
-class TimerMixin:
-	def __init__(self, *args, **kwargs):
-		self.timeout = kwargs.pop("timeout", 0.0)
-		self.elapsed_time = 0.0
-		self._super.__init__(self, *args, **kwargs)
-		if self.timeout:
-			# set per operation timeout to one-fifth of total pop timeout
-			self.sock.settimeout(self.timeout / 5.0)
-
-	def _getline(self, *args, **kwargs):
-		start_time = time.monotonic()
-		ret = self._super._getline(self, *args, **kwargs)
-
-		self.elapsed_time += time.monotonic() - start_time
-		if self.timeout and self.elapsed_time > self.timeout:
-			raise EmailTimeoutError
-
-		return ret
-
-	def quit(self, *args, **kwargs):
-		self.elapsed_time = 0.0
-		return self._super.quit(self, *args, **kwargs)
-
-
-class Timed_POP3(TimerMixin, poplib.POP3):
-	_super = poplib.POP3
-
-
-class Timed_POP3_SSL(TimerMixin, poplib.POP3_SSL):
-	_super = poplib.POP3_SSL
-
-
-class Timed_IMAP4(TimerMixin, imaplib.IMAP4):
-	_super = imaplib.IMAP4
-
-
-class Timed_IMAP4_SSL(TimerMixin, imaplib.IMAP4_SSL):
-	_super = imaplib.IMAP4_SSL