Added mu4e to emacs

.emacs.d/config.org

@@ -374,5 +374,6 @@ Load other files:
 (jm/load-config-if-exists "~/.emacs.d/org.org") ; Org-mode
 (jm/load-config-if-exists "~/.emacs.d/dired.org") ; Dired Config
 (jm/load-config-if-exists "~/.emacs.d/lsp.org") ; Language Server Protocol
-(jm/load-config-if-exists "~/.emacs.d/erc.org") ; Emacs IRC Client Config
+(jm/load-config-if-exists "~/.emacs.d/erc.org") ; IRC Client Config
+(jm/load-config-if-exists "~/.emacs.d/email.org") ; Mu4e Config
 #+end_src

.emacs.d/email.org

@@ -0,0 +1,113 @@
+* Custom Functions
+
+#+begin_src emacs-lisp
+(defconst jm/email-filters-path "~/Nextcloud/filters.json")
+
+(defun jm/any-string-match-p (needles haystack)
+  (when (listp needles)
+    (let (result)
+      (dolist (needle needles result)
+        (setq result (or result (s-matches-p needle haystack)))))))
+
+(defun jm/load-email-filters (msg)
+  (let ((filters (append (json-read-file jm/email-filters-path) nil))
+        (trash-flag (member
+                     (car (mu4e-string-to-flags "T"))
+                     (mu4e-message-field msg :flags)))
+        folder)
+    (if trash-flag
+        "/Trash"
+      (dolist (filter filters)
+        (let ((subject (mu4e-message-field msg :subject))
+              (filter-folder (cdr (assoc-string "folder" filter)))
+              (subject-filters (append (cdr (assoc-string "subject" filter)) nil))
+              (to-filters (append (cdr (assoc-string "to-contact" filter)) nil))
+              (from-filters (append (cdr (assoc-string "from-contact" filter)) nil))
+              (bcc-filters (append (cdr (assoc-string "bcc-contact" filter)) nil)))
+          (when (or (jm/any-string-match-p subject-filters subject)
+                    (mu4e-message-contact-field-matches msg :to to-filters)
+                    (mu4e-message-contact-field-matches msg :from from-filters)
+                    (mu4e-message-contact-field-matches msg :bcc bcc-filters))
+            (setq folder filter-folder))))
+      (if folder folder "/Archive"))))
+#+end_src
+
+* Mu4e
+
+This section contains the ~mu4e~ emacs specific configuration.
+
+#+begin_src emacs-lisp
+
+(use-package mu4e
+  :ensure nil
+  :bind ("C-x m" . mu4e)
+  :config
+  (add-hook 'mu4e-compose-mode-hook (lambda () (use-hard-newlines -1)))
+
+  (setq mu4e-mu-binary (executable-find "mu")
+        mu4e-change-filenames-when-moving t ; Avoids syncing issues.
+        mu4e-search-results-limit 2000 ; Extend header view max message count.
+        mu4e-compose-format-flowed t) ; Disable hard line wrapping
+
+  ;; Fix message citation style for gmail.
+  (setq message-cite-style message-cite-style-gmail
+        message-citation-line-format "On %a, %b %d, %Y at %H:%M %p %f wrote:"
+        message-citation-line-function 'message-insert-formatted-citation-line)
+
+  ;; Refresh mail every X seconds. Set to 5 minutes currently
+  (setq mu4e-update-interval (* 5 60)
+        mu4e-get-mail-command "mbsync -a"
+        mu4e-maildir "~/.mail")
+
+  ;; Config mu4e folders
+  (setq mu4e-drafts-folder "/Drafts"
+        mu4e-sent-folder "/Sent"
+        mu4e-trash-folder "/Trash"
+        mu4e-refile-folder #'jm/load-email-filters)
+
+  ;; Config mu4e bookmarks
+  (setq mu4e-bookmarks
+        '((:name "Filtered unread messages" :query "flag:unread AND (maildir:/Archive OR maildir:/INBOX) AND NOT flag:trashed" :key ?u)
+          (:name "All unread messages" :query "flag:unread" :key ?U)
+          (:name "Today's messages" :query "date:today..now" :key ?t)
+          (:name "Last 7 days" :query "date:7d..now" :hide-unread t :key ?w)
+          (:name "Flagged messages" :query "flag:flagged" :key ?f)))
+
+  (setq mu4e-maildir-shortcuts
+        ;; Proton folders
+        '((:maildir "/INBOX" :key ?i)
+          (:maildir "/Archive" :key ?a)
+          (:maildir "/Drafts" :key ?d)
+          (:maildir "/Sent" :key ?s)
+          (:maildir "/Spam" :key ?S)
+          (:maildir "/Trash" :key ?t)
+
+          ;; My folders
+          (:maildir "/Folders/Finance" :key ?f)
+          (:maildir "/Folders/Packages" :key ?p)
+          (:maildir "/Folders/Work" :key ?w)
+          (:maildir "/Folders/Club" :key ?c)
+          (:maildir "/Folders/UCSC" :key ?u)
+          (:maildir "/Folders/Newsletters" :key ?n))))
+#+end_src
+
+Adding some configuration to correct ~mu4e~'s default values.
+#+begin_src emacs-lisp
+(setq user-full-name "Jaden Provost Maxwell-Comfort")
+(setq user-mail-address "jadenprovost@proton.me")
+#+end_src
+
+* SMTP
+
+In order to send mail with ~mu4e~, you must also configure an SMTP client.  Based on the ~mu4e~ wiki, I was able to shamelessly steal some of the config for the gmail configuration found [[https://www.djcbsoftware.nl/code/mu/mu4e/Gmail-configuration.html][here]].
+
+#+begin_src emacs-lisp
+(use-package smtpmail
+  :after mu4e
+  :config
+  (setq smtpmail-stream-type 'starttls
+        smtpmail-smtp-server "127.0.0.1"
+        smtpmail-smtp-service 1025))
+
+(setq send-mail-function 'smtpmail-send-it)
+#+end_src

.mbsyncrc

@@ -0,0 +1,24 @@
+IMAPAccount protonmail
+Host 127.0.0.1
+User jadenprovost@proton.me
+PassCmd "rbw get 'protonmail-bridge'"
+Port 1143
+TLSType STARTTLS
+AuthMechs LOGIN
+CertificateFile ~/.config/protonmail/bridge-v3/cert.pem
+
+IMAPStore protonmail-remote
+Account protonmail
+
+MaildirStore protonmail-local
+Path ~/.mail/
+Inbox ~/.mail/INBOX
+SubFolders Verbatim
+
+Channel protonmail
+Far :protonmail-remote:
+Near :protonmail-local:
+Patterns * "!All Mail"
+Create Both
+Expunge Both
+SyncState *