Funkce na posílání emailu na reset hesla

config.py.example

@@ -6,3 +6,5 @@ SECRET_KEY = "FIXME"
 
 SESSION_COOKIE_PATH = '/'
 SESSION_COOKIE_NAME = 'mo_session'
+
+MAIL_FROM = "mo-submit@matfyz.cz"  # FIXME
\ No newline at end of file

mo/util.py

 # Různé
 
-import mo.db as db
 from typing import Any, Optional
+import email.message
+import email.headerregistry
+import datetime
+import subprocess
+import textwrap
+
+import mo.db as db
+import config
 
 current_log_user: Optional[db.User] = None
 
@@ -14,3 +21,44 @@ def log(type: db.LogType, what: int, details: Any):
         details=details,
     )
     db.get_session().add(entry)
+
+
+def send_password_reset_email(user: db.User, link: str):
+    if not hasattr(config, 'MAIL_FROM'):
+        raise RuntimeError('V configu chybí pole MAIL_FROM.')
+
+    msg = email.message.EmailMessage()
+    msg['From'] = email.headerregistry.Address(
+        display_name='MO Submit', addr_spec=config.MAIL_FROM
+    )
+    msg['To'] = [
+        email.headerregistry.Address(
+            display_name='{} {}'.format(user.first_name, user.last_name),
+            addr_spec=user.email,
+        )
+    ]
+    msg['Subject'] = f'MO Submit – obnova hesla'
+    msg['Date'] = datetime.datetime.now()
+
+    body = textwrap.dedent('''
+        Pro obnovení hesla pro váš účet na MO Submit klikněte sem: {}
+
+        Váš MO Submit
+    '''.format(link))
+
+    msg.set_content(body, cte='quoted-printable')
+
+    sm = subprocess.Popen(
+        [
+            '/usr/sbin/sendmail',
+            '-oi',
+            '-f',
+            config.MAIL_FROM,
+            user.email,
+        ],
+        stdin=subprocess.PIPE,
+    )
+    sm.communicate(msg.as_bytes())
+
+    if sm.returncode != 0:
+        raise RuntimeError('Sendmail failed with return code {}'.format(sm.returncode))

mo/web/main.py

@@ -4,6 +4,7 @@ import wtforms
 import wtforms.validators as validators
 from sqlalchemy.orm import joinedload
 
+import mo.util
 import mo.db as db
 import mo.rights
 import mo.users
@@ -37,7 +38,12 @@ def login():
         token = mo.users.ask_reset_password(user)
         link = url_for('reset', token=token)
         db.get_session().commit()
-        # FIXME: Poslat e-mail
+
+        try:
+            mo.util.send_password_reset_email(user, link)
+        except RuntimeError as e:
+            app.logger.error('Login: problém při posílání emailu: {}'.format(e))
+
         app.logger.info('Link: %s', link)
         return render_template('reset.html')
     elif not form.passwd.data or not mo.users.check_password(user, form.passwd.data):

[Martin Mareš]

Prosím nevyráběj neukončené řádky ;)

[Martin Mareš]

Tohle asi nemusí být f-string.

[Martin Mareš]

Tohle už můžeš zrušit.