bundles/check-mail-received: move check source to icinga2 itself

bundles/icinga2/files/check_imap_for_mail_from

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+
+from imaplib import IMAP4_SSL
+from subprocess import check_output
+from sys import argv, exit
+from time import time
+
+if len(argv) < 5:
+    print('Usage: {} <imap host> <username> <password> <message sender>'.format(argv[0]))
+    exit(3)
+
+NOW = time()
+
+try:
+    imap = IMAP4_SSL(argv[1])
+    imap.login(argv[2], argv[3])
+
+    imap.select('Inbox')
+
+    _, data = imap.search(None, 'ALL')
+
+    something_found = False
+
+    for item in data:
+        for index in item.split():
+            received_in_this_mail = None
+            from_in_this_mail = False
+
+            try:
+                message = imap.fetch(index, '(RFC822)')
+
+                message_text = bytearray()
+                for part in message[1][0]:
+                    message_text.extend(part)
+                message_text = message_text.decode().splitlines()
+
+                for line in message_text:
+                    lline = line.strip().lower()
+
+                    if lline.startswith('from:') and argv[4].lower() in line:
+                        from_in_this_mail = True
+
+                    if lline.startswith('date:'):
+                        date = line.strip()[5:].strip()
+                        unixtime = int(check_output([
+                            'date',
+                            '--date={}'.format(date),
+                            '+%s',
+                        ]).decode().strip())
+
+                        if unixtime > (NOW-(60*60*25)):
+                            received_in_this_mail = date
+
+                    if received_in_this_mail and from_in_this_mail:
+                        print('Found message from "{}" sent at "{}"'.format(argv[4], received_in_this_mail))
+                        received_in_this_mail = None
+                        from_in_this_mail = False
+                        something_found = True
+            except:
+                pass
+
+    if  something_found:
+        # there should be output above
+        exit(0)
+
+    print('No Mails found')
+    exit(2)
+except Exception as e:
+    print(repr(e))
+    exit(3)