outsource interaction part to separate file; better name scheming; update default status values; small improvements

status-interaction.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+CURDIR=$(dirname "$(readlink -f "$0")")
+source "$CURDIR"/shared-functions.so
+
+# MAIL QUEUE ACTIONS
+function send_mailqueue {   # send queued mails
+  msmtp-listqueue.sh
+  read -p "Send these queued mails? [Y/n]: " YN
+  if [[ $YN =~ ^(Y|y|)$ ]]; then
+    msmtp-runqueue.sh
+  else
+    echo "Not sending emails"
+  fi
+}
+function list_mailqueue {   # list emails in queue only
+  msmtp-listqueue.sh
+}
+
+# CHANGE ONLINE STATUS
+function switch_conn {
+  echo "Current connection status: $var_conn"
+  read -p "Switch connection status? [Y/n]: " YN
+  if [[ $YN =~ ^(Y|y|)$ ]]; then
+    if [ "$var_conn" == "off" ]; then
+      var_conn="on"
+      echo "Connection status switched to \"on\""
+    else
+      var_conn="off"
+      echo "Connection status switched to \"off\""
+    fi
+  else
+    echo "Connection status not changed."
+  fi
+}
+
+# OPTION SCREEN
+function exec {
+  ACTIONS=("send mails in queue" "list mails in queue" "switch connection status [$var_conn]" "quit")
+  PS3="Select action: "
+  
+  select action in "${ACTIONS[@]}"
+  do
+    echo  # empty line after selection
+    case $REPLY in  # $REPLY takes the numbers which is nice
+      1) # Show queue; ask for confirmation; if yes, send emails
+      send_mailqueue
+      break ;;
+      2) # Show queue
+      list_mailqueue
+      break ;;
+      3) # Switch online status
+      switch_conn
+      break ;;
+      4|"q") # exit silently, one can also press "q" instead of the number
+      exit 0
+      break ;;
+    esac
+  done
+}
+
+while :; do             # endless loop
+  exec                  # interaction screen
+  wtmp; source "$TMP"   # write changes back and load them
+  echo                  # empty line
+done