Add an expirydays config option to warn about balance expiration

If the balance is about to expire, warn about it even if the amount of
the balance is still sufficient.

README.md

@@ -20,6 +20,7 @@ be available in the PATH:
   * [bash](https://www.gnu.org/software/bash/bash.html)
   * [curl-impersonate](https://github.com/lwthiker/curl-impersonate), **or**
   * [Docker](https://www.docker.com/)
+  * [gawk](https://www.gnu.org/software/gawk/gawk.html) (gawk)
   * [HTML Tidy](https://www.html-tidy.org/) (tidy)
   * [XMLStarlet](https://xmlstar.sourceforge.net/) (xmlstarlet)
   * a sendmail-compatible MTA (sendmail)
@@ -48,8 +49,12 @@ Set `warnlimit` to the dollar amount below which an warning e-mail will be
 sent when the script is run. `lowmail` must be set to `yes` for an e-mail to
 actually be sent.
 
+Set `expirydays` to the number of days before expiry of the balance after which a
+warning e-mail will be sent. This defaults to 7. `lowmail` must be set to `yes`
+for an e-mail to actually be sent.
+
 Set `lowmail` to `yes` to have the script send an e-mail whenever the balance
-goes below `warnlimit`.
+goes below `warnlimit` or the expiry date is within `expirydays`.
 
 Set `alwaysmail` to `yes` to have the script send an e-mail every time it is
 run, regardless of the limit. Leave it blank to only mail below the warning

speakout-account-info

@@ -35,6 +35,7 @@ account=
 password=
 recipient=
 warnlimit=0
+expirydays=7
 alwaysmail=
 lowmail=
 quiet=
@@ -147,9 +148,23 @@ As of $(date), the balance remaining on the cellular number $NICEPHONENUM is
 <span style='font-size: medium'>\$$BALANCE</span> which expires $EXPIRY.
 EOF
 
+if awk -F/ -v EXPIRYDAYS="$expirydays" '{exit mktime($3 " " $1 " " $2 " 00 00 00") - systime() >= EXPIRYDAYS * 24*3600}' <<< "$EXPIRY"; then
+    readonly TIMEEXCEEDED=yes
+    cat >>"$CONTENTFILE" <<EOF
+        <span style='color: pink; font-weight: bold;'>This is expiring within $expirydays days!</span>
+EOF
+else
+    readonly TIMEEXCEEDED=
+fi
+
 if [[ -n "$LIMITEXCEEDED" ]]; then
     cat >>"$CONTENTFILE" <<EOF
         <span style='color: pink; font-weight: bold;'>This is below the warning threshold of \$$warnlimit!</span>
+EOF
+fi
+
+if [[ -n "$LIMITEXCEEDED" || -n "$TIMEEXCEEDED" ]]; then
+    cat >>"$CONTENTFILE" <<EOF
         <p>
         Add more money to your account now by
         <a href="https://www.speakout7eleven.ca/userinfo/activation/topup/an/$PHONENUM/">choosing an amount here</a>.
@@ -162,7 +177,7 @@ cat >>"$CONTENTFILE" <<EOF
 </body></html>
 EOF
 
-if [[ -n "$recipient" && ( -n "$alwaysmail" || ( -n "$lowmail" && -n "$LIMITEXCEEDED" ) ) ]]; then
+if [[ -n "$recipient" && ( -n "$alwaysmail" || ( -n "$lowmail" && ( -n "$LIMITEXCEEDED" || -n "$TIMEEXCEEDED" ) ) ) ]]; then
     STAGE='sending e-mail'
     (
     echo "To: $recipient"

speakoutinforc

@@ -12,6 +12,8 @@ recipient=$USER@localhost
 # Lower limit (in dollars) below which a warning e-mail is generated; defaults to 0
 # lowmail must be set to yes for an e-mail to actually be sent.
 warnlimit=5
+# Start warning this number of days before expiry
+expirydays=7
 # Send an e-mail when the balance goes below warnlimit
 lowmail=yes
 # Set to yes to always send an e-mail, regardless of warnlimit, empty to send