From 3f2e142d2c9b1e46faee988111abaffea946ce6a Mon Sep 17 00:00:00 2001
From: Mark Powers <mark@marks.kitchen>
Date: Sun, 20 Sep 2020 02:09:44 +0000
Subject: Add imap to email_helper, add reminders in daily-update

---
 email_helper.py | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

(limited to 'email_helper.py')

diff --git a/email_helper.py b/email_helper.py
index d3edfb8..84440ea 100644
--- a/email_helper.py
+++ b/email_helper.py
@@ -1,6 +1,9 @@
 import smtplib
+import imaplib
+import email
 from email.mime.text import MIMEText
 from email.utils import formatdate
+from email.header import decode_header
 
 from config import config
 
@@ -26,3 +29,71 @@ def send(frm, name, to, subject, body, subtype="plain"):
         print("error")
         print(e)
 
+def get_subject(msg):
+    subject = decode_header(msg["Subject"])[0][0]
+    if isinstance(subject, bytes):
+        subject = subject.decode()
+    return subject
+
+def get_body(msg):
+    if msg.is_multipart():
+        body = ""
+        for part in msg.walk():
+            try:
+                # get the email body
+                body += part.get_payload(decode=True).decode()
+            except:
+                pass
+    else:
+        body = msg.get_payload(decode=True).decode()
+    return body
+
+def get_from(msg):
+    return msg.get("From")
+
+def get_content_type(msg):
+    return msg.get_content_type()
+
+def set_unseen(imap, idx):
+    imap.store(idx, '-FLAGS', '\\SEEN')
+
+def get_what(msg, what):
+    if what == "subject":
+        return get_subject(msg)
+    elif what == "body":
+        return get_body(msg)
+    elif what == "from":
+        return get_from(msg)
+    elif what == "content_type":
+        return get_content_type
+
+def parse(imap, index, check_what, criteria, return_what):
+    res, msg = imap.fetch(index, "(RFC822)")
+    for response in msg:
+        if isinstance(response, tuple):
+            msg = email.message_from_bytes(response[1])
+            if criteria in get_what(msg, check_what):
+                return get_what(msg, return_what)
+
+def filter_unread(check_what, criteria, return_what):
+    """ check if the field 'check_what' contains the given criteria, and if so return a list
+    of the field 'return_what'
+    """
+    imap = imaplib.IMAP4_SSL(config["email"]["server"])
+    imap.login(config["email"]["user"], config["email"]["pass"])
+    status, messages = imap.select("INBOX")
+    
+    status, response = imap.search(None, '(UNSEEN)')
+    unread_msg_nums = response[0].split()
+
+    ret = [] 
+    for i in unread_msg_nums:
+        parse_return = parse(imap, i, check_what, criteria, return_what)
+        if parse_return is not None:
+            ret.append(parse_return)
+        set_unseen(imap, i)
+    imap.close()
+    imap.logout()
+
+    return ret
+
-- 
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