mutt-wizard/bin/mw

#!/bin/sh

VERSION="2.0"

if [ "${BASH_SOURCE[0]}" = "${0}" ]; then
  prefix=${0}
else
  prefix="$BASH_SOURCE"
fi
[ ! ${prefix::1} = "/" ] && prefix="$PWD/$prefix"
prefix="${prefix%/bin/*}"
mwbin="$prefix/bin/mw"

_MW_="mutt-wizard"
_MW_generated="mutt-wizard-generated"

mwconfigdir=${XDG_CONFIG_HOME:-$HOME/.config}
# Main mutt config location
mwmuttdir="$mwconfigdir/mutt"
mwmuttrc="$mwmuttdir/muttrc"
# Directory for account settings
mwaccmuttdir="$mwmuttdir/accounts"
# Generated at every full sync
mwgenmuttaccs=$mwmuttdir/mw_gen_mutt_accounts.muttrc
# Location of mail storage
mwmaildir="${MAILDIR:-$HOME/mail}"
# Regex to confirm valid email address
mwemailre=".\+@.\+\\..\+"
mwshare="$prefix/share/$_MW_"
mwmbsyncrc="$mwconfigdir/isync/mbsyncrc"
mwgetmaildir=$mwconfigdir/getmail # POP3
mwmsmtprc="$mwconfigdir/msmtp/config"
mwsharerc="$mwshare/$_MW_.muttrc"
mwcachedir="${XDG_CACHE_HOME:-$HOME/.cache}/$_MW_"
mwmbsyncbin="$prefix/bin/mbsync -c $mwmbsyncrc"
mwgetmailbin="$prefix/bin/getmail"
msmtpbin="$prefix/bin/msmtp"

_mwtakeaddr(){
  mwaccmaildir="$mwmaildir/$mwaddr" # mail dir is $MAILDIR/email
  mwacccachedir=$mwcachedir/${mwaddr//[.@]/_} # @ cannot stay because of mutt, . could
  [ -n "$mwpass" ] || mwpass=$_MW_-$mwaddr
  [ -n "$mwidnum" ] && mwaccmuttrc="$mwaccmuttdir/$mwidnum-$mwaddr.mwonofftype.$mwtype.muttrc"
}

_mwaddrs() {
  mwaddrs="$(find "$mwaccmuttdir" -type f | grep -o "[1-9]-.*.muttrc" | sed "s/-/: /;s/\.muttrc//" | sort -n)"
}

_mwgetpass() {
  while : ; do pass rm -f "$mwpass" >/dev/null 2>&1
    pass insert "$mwpass" && break; done ;
}

_mwcheckcert() {
  for mwcrt in "/etc/ssl/certs/ca-certificates.crt" "/etc/pki/tls/certs/ca-bundle.crt" "/etc/ssl/ca-bundle.pem" \
    "/etc/pki/tls/cacert.pem" "/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem" "/etc/ssl/cert.pem" "/usr/local/share/ca-certificates/"
  do
    [ -f "$mwcrt" ] && mwsslcert="$mwcrt" && break
  done || { echo "CA Certificate not found. Please install one or link it to /etc/ssl/certs/ca-certificates.crt" && return 1 ;}
}

_mwcheckinternet() {
  # Checks for internet connection
  if type systemctl >/dev/null; then
    if ! systemctl --type service | grep net | grep active > /dev/null; then
      echo "No internet connection."
      return 1
    fi
  else
    if ! ping -q -c 1 1.1.1.1 > /dev/null; then
      echo "No internet connection (ping failed)."
      return 1
    fi
  fi
}

_mwasktype() {
  if [ -z "$mwtype" ]; then
    while : ; do
      printf "Do you want to sync your mails using the command 'mw' outside mutt? [yes/no]\\n"
      printf "'no' makes Neomutt slow for IMAP accounts, so probably you want 'yes'.\\n\t"
      read -r mwoffline
      case "$mwoffline" in
        [Yy][Ee][Ss]) mwtype="offline" && break ;;
        [Nn][Oo]) mwtype="online" && break ;;
        *) echo "Write out either yes or no completely. Try again or press ctrl-c to quit." ;;
      esac
    done
  fi
  if [ "$mwtype" == "offline" ]; then
    ! type "$prefix/bin/msmtp" >/dev/null && printf "\033[31m\`msmtp\` must be installed. You can do that afterwards.\\n\033[0m"
  else
    ! ( type mutt >/dev/null || type neomutt >/dev/null ) && printf "\033[31m\`mutt\` must be installed. You can do that afterwards.\\n\033[0m"
  fi

  return 0
}

_mwaskinfo() {
  if [ -z "$mwaddr" ]; then 
    printf "Type the \033[31memail address\033[0m\\n\t\033[36m"
    read -r mwaddr
    printf "\033[0m"
    while ! echo "$mwaddr" | grep "$mwemailre" >/dev/null; do
      printf "That is not a valid \033[31memail address\033[0m, please retype\\n\t\033[36m"
      read -r mwaddr
      printf "\033[0m"
    done
  fi
  mwdomain="$(echo "$mwaddr" | sed "s/.*@//")"
  if [ -z "$mwserverinfo" ]; then
    printf "\\nSearching for \033[32m%s\033[0m in \033[34m\`domains.csv\`\033[0m..." "$mwdomain"
    mwserverinfo="$(grep "^$mwdomain" "$mwshare/domains.csv" 2>/dev/null)"
  fi
  if [ -z "$mwserverinfo" ]; then
    printf "Your email domain is not known to $_MW_.\\nType in your settings.\\n"
    printf "Usually you find them by an internet search.\\n"
    printf "Type the IMAP/POP3 server (excluding the port number)\\n\033[36m\t"
    read -r mwurl
    printf "\033[0mIMAP port number (usually 993)\\n\033[36m\t"
    read -r mwport
    printf "\033[0mSMTP server (excluding the port number)\\n\033[36m\t"
    read -r mwsurl
    printf "\033[0mSMTP port number (usually 587 or 465)\\n\033[36m\t"
    read -r mwsport
    printf "\033[0m\\nIf you want, you can copy the line below and add it to the \`domains.csv\` file on Github, for others.\\n\\n"
    printf "%s,%s,%s,%s,%s\\n\\nBut be sure the setting works, first! ;-)\\n" "$mwdomain" "$mwurl" "$mwport" "$mwsurl" "$mwsport"
  else # found server info
    IFS=, read -r mwservice mwurl mwport mwsurl mwsport <<EOF
$mwserverinfo
EOF
    printf "\\n\033[3;33mCongrats!\033[0m Server info is known, so you don't need to look it up!\\n"
    printf "\t\033[1mIMAP server\033[0m: %s\\n\t\033[1mIMAP port\033[0m: %s\\n\t\033[1mSMTP server\033[0m: %s\\n\t\033[1mSMTP port\033[0m: %s\\n" \
      "$mwurl" "$mwport" "$mwsurl" "$mwsport"
    case "$mwservice" in
      gmail.com) printf "\033[31mGmail: \"less secure\" must be enabled before you continue.\\nDo it now, if you have not done it already:\\nhttps://support.google.com/accounts/answer/6010255\\n\033[0m" ;;
      protonmail.ch|protonmail.com|pm.me) printf "\033[31mProtonmail: Users must install and configure Protonmail Bridge for the sync to work:\\nhttps://protonmail.com/bridge/\\n\033[0m" && mwssltype="None" ;;
    esac
  fi
  if [ -z "$mwname" ]; then
    printf "Name to associate to email.\\n\t"
    read -r mwname
  fi
  if [ -z "$mwlogin" ]; then
    printf "Type your account username if different from your email address.\\n"
    printf "\033[34mFor most accounts you can probably leave this blank.\033[0m\\n\tLogin(?): \033[36m"
    read -r mwlogin
    printf "\033[0m"
    [ -z "$mwlogin" ] && mwlogin="$mwaddr"
  fi
  # if the user has a pass entry he could provide it via mwpass
  if [ -z "$mwpass" ]; then
    mwpass=$_MW_-$mwaddr
    _mwgetpass
  fi
  _mwtakeaddr
  if [ "$mwport" = "110" ] || [ "$mwport" = "995" ]; then # POP3
    [ "$mwport" = "110" ] && mwkind="pop" || mwkind="pops"
  else
    [ "$mwport" = "143" ] && mwkind="imap" || mwkind="imaps"
    [ "$mwkind" = "imap" ] && mwssltype="None" || mwssltype=${mwssltype:-${mwkind^^}}
  fi
  [ "$mwsport" = "465" ] && mwstarttlsoff="tls_starttls off"
  return 0
}

_mwsmtp() {
  mkdir -p "${mwmsmtprc%/*}"
  if [ ! -f "$mwmsmtprc" ]; then
    cat > "$mwmsmtprc" <<EOF
defaults
auth  on
tls  on
tls_trust_file  $mwsslcert
#logfile  ${XDG_LOG_HOME:-$HOME}/msmtp.log

EOF
  else
    sed -i "/account $mwaddr/,/^\(\s*$\|account\)/d" "$mwmsmtprc" &>/dev/null
  fi
  cat >> "$mwmsmtprc" <<EOF
account $mwaddr
host $mwsurl
port $mwsport
from $mwaddr
user $mwlogin
passwordeval "pass $mwpass"
$mwstarttlsoff

EOF
  case "$mwservice" in
    protonmail.ch|protonmail.com|pm.me) _mwprotonfinger || return 1 ;;
  esac
}

_mwprotonfinger() {
  printf "Getting Protonmail bridge fingerprint...\\n"
  mwfingerprint="$($msmtpbin --serverinfo --host=127.0.0.1 --port=1025 --tls --tls-certcheck=off)" || return 1
  sed -i "s/account $mwaddr/&\ntls_trust_file\ntls_fingerprint $mwfingerprint/" "$mwmsmtprc" &>/dev/null
}

_mwmbsync() {
  mkdir -p "${mwmbsyncrc%/*}"
  [ -f "$mwmbsyncrc" ] && sed -i "/IMAPStore $mwaddr-remote$/,/# End $_MW_ profile/d" "$mwmbsyncrc"
  cat >> "$mwmbsyncrc" <<EOF
IMAPStore $mwaddr-remote
Host $mwurl
Port  $mwport
User $mwlogin
PassCmd "pass $mwpass"
SSLType $mwssltype
CertificateFile $mwsslcert

MaildirStore $mwaddr-local
Subfolders Verbatim
Path $mwaccmaildir/
Inbox $mwaccmaildir/INBOX

Channel $mwaddr
Expunge Both
Master :$mwaddr-remote:
Slave :$mwaddr-local:
Patterns * !"_/*" !"[Gmail]" !"[Gmail]/All Mail"
Create Both
SyncState *
MaxMessages 0
# End $_MW_ profile

EOF
}

_mwpop() {
    mkdir -p "$mwgetmaildir"
    cat > "$mwgetmaildir/$mwaddr" <<EOF
[retriever]
type = SimplePOP3SSLRetriever
server = $mwurl
username = $mwlogin
port = $mwport
password_command = ("pass", "$mwpass")

[destination]
type = Maildir
path = $mwaccmaildir/INBOX/

[options]
read_all = true
delete = true
#message_log = ${XDG_LOG_HOME:-$HOME}/getmail.log

# vim: ft=conf

EOF
}

_mwprofiles() {
  printf "Creating profiles for \`%s\`..." "$mwaddr"
  # mutt
  [ ! -f "$mwgenmuttaccs" ] && _mwgenmuttaccs

  if [ "$mwtype" = "offline" ]; then # not online, actually outside mutt
    if [ "${mwkind::3}" = "pop" ]; then
      ! type "$prefix/bin/getmail" >/dev/null && printf "\033[31mFor POP3 \`getmail\` must be installed to use \`mw\`. You can do that afterwards.\\n\033[0m"
      _mwpop
    else
      ! type "$prefix/bin/mbsync" >/dev/null && printf "\033[31mFor IMAP \`mbsync\` must be installed to use \`mw\`. You can do that afterwards.\\n\033[0m"
      _mwmbsync
    fi
    _mwsmtp
  fi
  return 0
}

_mwtryconnect() {
  if [ ! -d "$mwaccmaildir" ]; then
    [ ! "${mwkind::3}" = "pop" ] && mwaccmaildirWasThere="NO" # mutt uses $mwacccachedir for "online" IMAP, so clean up later
    mkdir -p "$mwaccmaildir"
  fi
  if [ -z "$mwmailboxes" ]; then
    #just check server, no mail retrieval
    if [ "${mwkind::3}" = "pop" ]; then
      [ "$mwport" = "110" ] && mwp="POP3" || mwp="POP3_SSL"
      python -c "from poplib import $mwp;p=$mwp('$mwurl');print(p.getwelcome());p.quit()" | \
        grep "+OK" && mwmailboxes="INBOX"
    else
      # for online do without mbsync, i.e. don't require it for mail setup, either
      # mwmailboxes="$($mwmbsyncbin -l $mwaddr | sed 's/\//./')" >/dev/null 2>&1
      [ "$mwport" = "143" ] && mwi="IMAP4" || mwi="IMAP4_SSL"
      mwpw="$(pass $mwpass)"
      mwmailboxes="$(python -c "from imaplib import $mwi;m=$mwi('$mwurl');m.login('$mwlogin','$mwpw');b=m.list()[1];print('\n'.join(e.split(b' \"/\" ')[-1].strip(b'\"').decode() for e in b if all(x not in e for x in [b'[Gmail]/All Mail',b'Noselect',b'HasChildren'])));m.logout()")"
    fi
  fi
  if [ -n "$mwmailboxes" ]; then
    mwspoolfile=$(echo "$mwmailboxes" | grep -i -m 1 inbox | sed -ne 's/.*/+\0/p')
    [ -z "$mwspoolfile" ] && printf "\033[31mNo spoolfile.\033[0m\\n" && return 1

    printf "\033[32mMailboxes detected.\033[0m\\n"
    if [ -z "$mwserverinfo" ]; then
        printf "\033[32mPlease add the line below at https://github.com/rpuntaie/mutt-wizard/issues/1\033[0m\\n\\n"
        printf "\033[31m$mwservice,$mwurl,$mwport,$mwsurl,$mwsport\0330m\\n\\n"
    fi

    echo "$mwmailboxes" | xargs -I {} mkdir -p "$mwaccmaildir/{}/"{cur,new,tmp}
    return 0
  else
    printf "\033[31mLog-on not successful.\033[0m\\n"
    printf "It seems that either you entered the wrong password or server settings, or there are other requirements for your account out of the control of $_MW_.\\n"
    return 1
  fi
}

_mwnotmuchauto() {
  [ -z "$NOTMUCH_CONFIG" ] && NOTMUCH_CONFIG="$HOME/.notmuch-config"
  [ -f "$NOTMUCH_CONFIG" ] && return 0
  mkdir -p "${NOTMUCH_CONFIG%/*}"
  cat > "$NOTMUCH_CONFIG" <<EOF
[database]
path=$mwmaildir
[user]
name=$mwname
primary_email=$mwaddr
[new]
tags=new
ignore=
[search]
exclude_tags=deleted;spam;
[maildir]
synchronize_flags=true
[crypto]
gpg_path=$GPG"

EOF
}

_mwfinalize() { # new mwaccmuttrc
  if [ "$mwtype" = "online" ]; then
    if [ ! "${mwkind::3}" = "pop" ]; then
      mkdir -p "$mwacccachedir"
    fi
  fi
  _mwgenmwaccmuttrc || return 1
  if [ "$mwtype" = "offline" ]; then # not online
    _mwnotmuchauto
    printf "All done.\\n\033[33mYou can now run \`\033[32mmw [%s]\033[33m\` to sync your mail.\033[0m\\n" "$mwaddr"
  elif [ "${mwkind::3}" = "pop" ]; then # and online
    _mwnotmuchauto #still usable for online (in mutt) pop
  fi
  if [ "$mwtype" = "online" ]; then
    [ "$mwaccmaildirWasThere" = "NO" ] && rm -rf "$mwaccmaildir" &>/dev/null
  fi
  return 0
}

_mwdelete() {
  [ "$mwaccmaildirWasThere" = "NO" ] && rm -rf "$mwaccmaildir" &>/dev/null
  rm -f "$mwaccmuttrc" &>/dev/null
  if [ "$mwtype" = "offline" ]; then # not online
    sed -i "/${mwaccmuttrc//\//\\\/}/d" "$mwgenmuttaccs" &>/dev/null
    sed -i "/account $mwaddr/,/^\(\s*$\|account\)/d" "$mwmsmtprc" &>/dev/null
    if [ -f "$mwgetmaildir/$mwaddr" ]; then
      rm -f "$mwgetmaildir/$mwaddr" &>/dev/null
    else
      sed -i "/IMAPStore $mwaddr-remote$/,/# End $_MW_ profile/d" "$mwmbsyncrc" &>/dev/null
    fi
  else
    sed -i "/${mwaccmuttrc//\//\\\/}/d" "$mwmuttrc" &>/dev/null
    rm -rf "$mwacccachedir" &>/dev/null
  fi
}

_mwadd() {
  type gpg >/dev/null 2>&1 && GPG="gpg" || GPG="gpg2"
  [ -z "$PASSWORD_STORE_DIR" ] && PASSWORD_STORE_DIR="$HOME/.password-store"
  [ -r "$PASSWORD_STORE_DIR/.gpg-id" ] &&
    "$GPG" --list-secret-keys $(cat "$PASSWORD_STORE_DIR/.gpg-id") >/dev/null 2>&1 || {
    printf "\`pass\` must be installed and initialized to encrypt passwords.\\nBe sure it is installed and run \`pass init <yourgpgemail>\`.\\n"
    printf "If you don't have a GPG public private key pair, run \`$GPG --full-gen-key\` first.\\n"
    return 1
  }
  _mwcheckcert && _mwcheckinternet && _mwasktype && _mwaskinfo && _mwprofiles && _mwtryconnect && _mwfinalize || _mwdelete
}

_mwconfirm() {
  printf "[y/N]: Do you want to %s?\\n\t" "$@" && read -r mwinput && ! echo "$mwinput" | grep -i "^y$\|^yes$" >/dev/null \
    && printf "That doesn't seem like a yes to me.\\n\\n" && return 1
  return 0 ;
}

_mwlist() {
  _mwaddrs && [ -n "$mwaddrs" ] && echo "${mwaddrs//.mwonofftype./ }"
}

_mwpick() {
  printf "Select an accounts to %s:\\n" "$1"
  _mwlist
  [ -z "$mwpick" ] && read -r mwpick
  mwidnum="$mwpick"
  [ -z "$mwidnum" ] && return 1
  mwaddr="$(echo "$mwaddrs" | grep -i -m 1 "$mwidnum:" | sed "s/\.mwonofftype\./ /" | awk '{print $2}')"
  mwtype="$(echo "$mwaddrs" | grep -i -m 1 "$mwidnum:" | sed "s/\.mwonofftype\./ /" | awk '{print $3}')"
  _mwtakeaddr
  [ -z "$mwaddr" ] && printf "Invalid response." && return 1
  return 0 ;
}

_mwcron() {
  ! pgrep cron >/dev/null && echo "No cron manager running. Install/enable one and then select this option again." && return 1
  if crontab -l | grep "mw sync" >/dev/null; then
    if [ -z $mwcronminutes ]; then
      echo "Active mail sync cronjob detected. Do you want to remove it?"
      printf "\033[36m\t"
      [ -z $mwcronremove ] && read -r mwcronremove
      printf "\033[0m"
    else # remove to add again
      mwcronremove="yes"
    fi
    echo "$mwcronremove" | grep -i "^y\(es\)*$" >/dev/null && crontab -l | sed '/mw sync/d' | crontab - >/dev/null \
      && echo "mw cronjob removed."
    [ -z $mwcronminutes ] && return
  fi
  if [ -z $mwcronminutes ]; then
    echo "How many minutes between each mail sync?"
    printf "\033[36m\t"
    [ -z $mwcronminutes ] && read -r mwcronminutes
    printf "\033[0m"
  fi
  while ! echo "$mwcronminutes" | grep "^[1-9]\+$" >/dev/null; do
    printf "That doesn't look like a number. How many minutes between each mail sync?\\n\033[36m\t"
    read -r mwcronminutes
    printf "\033[0m"
  done
  (crontab -l; echo "*/$mwcronminutes * * * * export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus; export DISPLAY=:0; $mwbin sync") \
      | crontab - && echo "mw cronjob added. Mail will sync every $mwcronminutes minutes. Be sure you have your cron manager running."
}

_mwpurge() {
  _mwconfirm "Remove all $_MW_ data" || exit
  mwaddrs="$(find "$mwaccmuttdir" -type f | grep -o "[1-9]-.*.muttrc" | sed "s/\.muttrc//")"
  for mwaddrsentry in $mwaddrs; do
    mwtype="$(echo "$mwaddrsentry" | sed "s/\.mwonofftype\./ /" | awk '{print $2}')"
    mwaddr="$(echo "$mwaddrsentry" | sed "s/\.mwonofftype\./ /" | awk '{print $1}')"
    mwidnum="$(echo "$mwaddr" | sed "s/-/ /" | awk '{print $1}')"
    mwaddr="$(echo "$mwaddr" | sed "s/-/ /" | awk '{print $2}')"
    _mwtakeaddr
    _mwdelete
  done
  rm -rf "$mwaccmuttdir"/[1-9]-*.muttrc "$mwcachedir" "$mwgenmuttaccs"
  sed -i "/\# $_MW_generated/d" "$mwmuttrc"
  crontab -l | sed '/mw sync/d' | crontab - >/dev/null
  echo "All configs and account settings have been purged."
}

# run after mbsync to create mutt settings for $mwaddr
_mwgenmwaccmuttrc() {
  mwaccmaildir="$mwmaildir/$mwaddr"
  mwmailboxes="$(find "$mwaccmaildir/" -name cur | sed "s,$mwaccmaildir/,,g;s,/cur,,")"
  [ "${mwmailboxes/ /}" = "" ] && echo "no mailboxes" && return 1
  mwspoolfile=$(echo "$mwmailboxes" | grep -i -m 1 inbox | sed -ne 's/.*/+\0/p')
  [ "${mwspoolfile/ /}" = "" ] && return 1
  mwrecord=$(echo "$mwmailboxes" | grep -i -m 1 sent | sed -ne 's/.*/+\0/p')
  [ -z "$mwrecord" ] && mkdir -p "$mwaccmaildir/Sent/"{cur,new,tmp} && mwrecord="+Sent"
  mwpostponed=$(echo "$mwmailboxes" | grep -i -m 1 draft | sed -ne 's/.*/+\0/p')
  [ -z "$mwpostponed" ] && mkdir -p "$mwaccmaildir/Drafts/"{cur,new,tmp} && mwpostponed="+Drafts"
  mwtrash=$(echo "$mwmailboxes" | grep -i -m 1 trash | sed -ne 's/.*/+\0/p')
  [ -z "$mwtrash" ] && mkdir -p "$mwaccmaildir/Trash/"{cur,new,tmp} && mwtrash="+Trash"
  # again to reflect the change
  mwmailboxes="$(find "$mwaccmaildir/" -name cur | sed "s,$mwaccmaildir/,,g;s,/cur,,")"
  # find mwaccmuttrc ...
  mwaccmuttrc="$mwaccmuttdir/$(find "$mwaccmuttdir" -type f | grep -m 1 -o "[1-9]-$mwaddr.mwonofftype.$mwtype.muttrc")"
  if [ ! -f "$mwaccmuttrc" ]; then
    # new mwidnum = first one missing
    _mwaddrs
    for mwx in $(seq 1 9); do echo "$mwaddrs" | grep "$mwx:" >/dev/null 2>&1 || { export mwidnum="$mwx"; break ;}; done
    mwaccmuttrc="$mwaccmuttdir/$mwidnum-$mwaddr.mwonofftype.$mwtype.muttrc"
  else
    mwidnum=${mwaccmuttrc%%-*}
    mwidnum=${mwidnum##*/}
  fi
  # link mwaccmuttrc ...
  if [ "$mwtype" = "offline" ]; then
    ! grep "source $mwaccmuttrc" "$mwgenmuttaccs" &>/dev/null && echo "source $mwaccmuttrc" >> $mwgenmuttaccs
  else #online
    ! grep "source $mwaccmuttrc" "$mwmuttrc" &>/dev/null && echo "source $mwaccmuttrc # $_MW_generated" >> $mwmuttrc
  fi
  # (re-)generate mwaccmuttrc ...
  mwmuttsync=$(printf '<sync-mailbox><enter-command>source %s<enter><change-folder>!<enter>;<check-stats>' $mwaccmuttrc)
  cat > "$mwaccmuttrc" <<EOF
# vim: filetype=muttrc
# muttrc file for account $mwaddr
# generated by $_MW_

set from = "$mwaddr"

EOF
  if [ "$mwtype" = "offline" ]; then
    cat >> "$mwaccmuttrc" <<EOF

macro index gm "<shell-escape>mw $mwaddr<enter>" "sync mail $mwaddr"

set folder = "$mwaccmaildir"
folder-hook \$folder '$mwmuttsync'

set sendmail = "/usr/bin/msmtp -a \$from"

EOF
  else # online
    if [ "${mwkind::3}" = "pop" ]; then
      cat >> "$mwaccmuttrc" <<EOF

bind index gm fetch-mail

# pop
set pop_user = "$mwlogin"
set pop_pass = "\`pass $mwpass\`"
set pop_host = "$mwkind://$mwlogin@$mwurl:$mwport"

set pop_delete = yes

set folder = "$mwaccmaildir"
folder-hook \$folder '$mwmuttsync'

EOF
    else # imap
      mwssl=${mwkind/imap/no}
      cat >> "$mwaccmuttrc" <<EOF

bind index gm imap-fetch-mail

set folder = "$mwkind://$mwlogin@$mwurl:$mwport"
set header_cache = "$mwacccachedir"
set message_cachedir = \$header_cache
set imap_user = "$mwlogin"
set imap_pass = "\`pass $mwpass\`"
account-hook \$folder 'set imap_user="$mwlogin" imap_pass="\`pass $mwpass\`"'
set mbox_type = Maildir
set ssl_starttls = ${mwssl/nos/yes}
set ssl_force_tls = ${mwssl/nos/yes}

set smtp_pass = "\`pass $mwpass\`"

EOF
    fi # imap
    #smtp
    [ "$mwsport" = "25" ] && mwsmtp="smtp" || mwsmtp="smtps"
    cat >> "$mwaccmuttrc" <<EOF
set smtp_url = "$mwsmtp://$mwlogin@$mwsurl:$mwsport"

EOF
  fi #online
  mwboxes="$(echo "$mwmailboxes" | sed -e "s/^ //g;s/.*/\"=\0\"/g" | tr "\n" " ")"
  mwaccmutt="${mwaddr//[.@]/_}"
  cat >> "$mwaccmuttrc" <<EOF
set spoolfile = "$mwspoolfile"
set record = "$mwrecord"
set postponed = "$mwpostponed"
set trash = "$mwtrash"

unmailboxes *
mailboxes =$mwaccmutt ===================== $mwboxes

macro index,pager i$mwidnum '$mwmuttsync' "switch to $mwaddr"

EOF
  [ -n "$mwname" ] && cat >> "$mwaccmuttrc" <<EOF
set realname = "$mwname"
alias me $mwname <$mwaddr>

EOF
  IFS=$'\n'
  for eqbox in $mwmailboxes; do
    qbox="${eqbox/\[/}"
    b1="${qbox::1}"
    box="${qbox##*/}"
    [ "$box" = "$qbox" ] && b2="${qbox:1:1}" || b2="${box:1:1}"
    boxi="$b1$b2"
    boxi="${boxi,,}"
    cat >> $mwaccmuttrc <<EOF
macro index,pager i$boxi "<change-folder>=$eqbox<enter>" "go to $eqbox"
macro index,pager M$boxi "<save-message>=$eqbox<enter>" "move mail to $eqbox"
macro index,pager C$boxi "<copy-message>=$eqbox<enter>" "copy mail to $eqbox"

EOF
  done
  unset IFS
  return 0
}

if [ "$(uname)" = "Darwin" ]; then
  _mwnotify() { osascript -e "display notification \"$2 in $1\" with title \"You've got Mail\" subtitle \"Account: $1\"" ;}
else
  if type notify-send >/dev/null; then
    _mwnotify() { notify-send "mw" "📬 $2 new mail(s) in \`$1\` account." ;}
  else
    _mwnotify() { echo "mw: 📬 $2 new mail(s) in \`$1\` account." ;}
  fi
fi

_mwaddr() {
  mwaddr=$1
  mwaddr=${mwaddr/#\~/$HOME}
  mwaddr=${mwaddr#$mwmaildir/}
  mwaddr=${mwaddr%%/*}
  mkdir -p $mwmaildir/$mwaddr
}

_mwgenmuttaccs(){
  mkdir -p "$mwmuttdir" "$mwaccmuttdir"
  [ ! -f "$mwmuttrc" ] && echo "# vim: filetype=muttrc" > "$mwmuttrc" && echo "muttrc created."
  ! grep "source $mwsharerc" "$mwmuttrc" >/dev/null && echo "source $mwsharerc # $_MW_generated" >> "$mwmuttrc"
  ! grep "source $mwgenmuttaccs" "$mwmuttrc" >/dev/null && echo "source $mwgenmuttaccs # $_MW_generated" >> "$mwmuttrc"
  cat > "$mwgenmuttaccs" <<EOF
# vim: filetype=muttrc
# generated by $_MW_

macro index gM '<shell-escape>mw<enter>' "sync all mail"

EOF
}

_mwgatheremails() {
  unset mwemails
  _mwgenmuttaccs
  if [ -f "$mwmbsyncrc" ]; then
    for store in $(sed -ne 's/^Path\s*//p' $mwmbsyncrc); do
      _mwaddr "$store"
      mwemails+=" $mwaddr"
    done
  fi
  if [ -d "$mwgetmaildir" ]; then
    for gmrc in $mwgetmaildir/*; do
      [ "${gmrc#$mwgetmaildir}" = "/*" ] && break
      store=$(sed -ne "s/^path\s*=\s*//p" $gmrc)
      store=${store/#\~/$HOME}
      _mwaddr "$store"
      mkdir -p "$store"/{cur,new,tmp}
      mwemails+=" $mwaddr"
    done
  fi
  mwemails="${mwemails/ /}"
}

_mwsyncandnotify() {
  mwaccmaildir="$mwmaildir/$mwaddr"
  if [ -f "$mwgetmaildir/$mwaddr" ]; then
    $mwgetmailbin --rcfile=$mwaddr --getmaildir=$mwgetmaildir
  else
    $mwmbsyncbin  $mwaddr
  fi
  [ -n "$mwnono" ] && return
  mwlastrun="$mwaccmaildir/.mw.lastrun"
  mwnew=$(find "$mwaccmaildir/INBOX/new/" "$mwaccmaildir/Inbox/new/" "$mwaccmaildir/inbox/new/" -type f -newer "$mwlastrun" 2> /dev/null)
  newcount=$(echo "$mwnew" | sed '/^\s*$/d' | wc -l)
  if [ "$newcount" -gt "0" ]; then
    _mwnotify "$mwaddr" "$newcount"
    for file in $mwnew; do
      # Extract subject and sender from mail.
      from=$(awk '/^From: / && ++n ==1,/^\<.*\>:/' "$file" | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | \
        awk '{ $1=""; if (NF>=3)$NF=""; print $0 }' | sed 's/^[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//')
      subject=$(awk '/^Subject: / && ++n == 1,/^\<.*\>: / && ++i == 2' "$file" | head -n-1 | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | \
        sed 's/^Subject: //' | sed 's/^{[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//' | tr -d '\n')
      _mwnotify "📧$from:" "$subject"
    done
  fi
  touch "$mwlastrun"
}

_mwsyncemails() {
  for mwaddr in $mwemails; do
    _mwsyncandnotify
  done
  rm $XDG_CONFIG_HOME/getmail/oldmail-* &>/dev/null
  echo notmuch new ...
  notmuch new &>/dev/null
}

_mwmuttemails() {
  for mwaddr in $mwemails; do
    _mwgenmwaccmuttrc
  done
}

_mwsync() {
  unset mwemails
  mwtype="offline"

  # Run only if user logged in (prevent cron errors)
  if ! pgrep -u "$USER" >/dev/null; then
    echo "$USER not logged in; sync will not run."
    return 1
  fi
  # Run only if not already running in other instance
  if pgrep -x mbsync >/dev/null; then
    echo "mbsync is running."
    return 1
  fi
  if pgrep -x notmuch >/dev/null; then
    echo "notmuch is running."
    return 1
  fi

  _mwcheckinternet || return 1

  _mwaddr "$1"
  mwemails="$mwaddr"
  [ "$mwemails" = "" ] && _mwgatheremails && _mwsyncemails && _mwmuttemails && return 0
  _mwsyncemails

  return 0
}

trap 'echo -e "\033[0m\n"; exit' STOP INT ABRT KILL

if [ "${BASH_SOURCE[0]}" = "${0}" ]; then

if [ "$#" -gt 1 ]; then
  echo "Command or email or no parameter (=sync all). See --help."
  return 1
fi

if [ "$1" = "" ]; then
  mwnono="NO"
  _mwsync
else
  case "$1" in
    list|ls) _mwlist ;;
    add) _mwadd ;;
    pass) _mwpick "change the password of" && _mwgetpass ;;
    remove|rm) _mwpick remove && _mwconfirm "remove the \`$mwaddr\` profile" && _mwdelete ;;
    purge) _mwpurge ;;
    cron) _mwcron ;;
    sync) _mwsync ;;
    *@*) _mwsync $1 ;;
    --version|-v) echo "$_MW_ $VERSION" ;;
    --help|-h) cat <<EOF
  mw: $_MW_ $VERSION, auto-configure and sync email accounts for mutt,
  including mutt-independent sync of mail with \`isync\` or download of POP3 mail with \`getmail\`.

  Commands:
    add           Add and configure an email address (9 max.)
    list          List configured accounts
    remove        Pick an account to remove
    purge         Remove all accounts and settings
    cron          Enable or disable an autosync via cronjob
    sync          sync/download mail based on config in $mwmbsyncrc and $mwgetmaildir
    --help|-h     Print this message
    --version|-v  Prints version

  With no parameter all configured emails are synced and all account muttrc's are created.
  With a parameter containing a @, an mail is assumed and that account is synced.

  Config requirements:

  - mbsyncrc: "Path" ends in email
  - getmail: config file name = email, "path" ends in email

EOF
  esac

  exit $?
  fi
fi