wrapper.sh

#!/bin/sh

if [ "x$DEBUG" != "x" ]
then
    set -x
fi

# The directory to store the two state files - /config is a docker standard
CACHEFILE=/tmp/MAM.ip
COOKIEFILE=/config/MAM.cookies

# HELPER: Ensure mam_id exists in the cookie file
ensure_mam_id() {
    if [ "x$mam_id" == "x" ]; then
        echo "Error: mam_id environment variable is missing."
        exit 1
    fi

    # Check if mam_id is missing from the file
    grep mam_id "${COOKIEFILE}" > /dev/null 2>/dev/null
    if [ $? -ne 0 ]; then
        # Append the mam_id manually so curl can use it next time
        # Expiry set to year 2038 to prevent issues
        printf ".myanonamouse.net\tTRUE\t/\tFALSE\t2147483647\tmam_id\t%s\n" "${mam_id}" >> "${COOKIEFILE}"
    fi
}

if [ "x$interval" == "x" ]
then
    echo Running with default interval of 1 minute
    SLEEPTIME=60
else
    if [ "$interval" -lt "1" ]
    then
        echo Cannot set interval to less than 1 minute
        echo "  => Running with default interval of 60 seconds"
        SLEEPTIME=60
    else
        echo Running with an interval of $interval minute\(s\)
        SLEEPTIME=`expr $interval \* 60`
    fi
fi

# 1. PREPARE SESSION
# Ensure file exists and has ID before we start
touch ${COOKIEFILE}
ensure_mam_id

# 2. VALIDATE SESSION
# We use the file for both input (-b) and output (-c)
curl -s -b ${COOKIEFILE} -c ${COOKIEFILE} https://t.myanonamouse.net/json/dynamicSeedbox.php > /tmp/MAM.output

# CRITICAL FIX: Restore mam_id if curl wiped it
ensure_mam_id

grep '"Success":true' /tmp/MAM.output > /dev/null 2>/dev/null
if [ $? -ne 0 ]
then
    echo "Login failed. Response: `cat /tmp/MAM.output`"
    echo "Please check your mam_id."
    exit 1
else
    echo "Session is valid."
fi

OLDIP=`cat $CACHEFILE 2>/dev/null`

while [ $PPID -ne 1 ]
do
    OLDIP=`cat $CACHEFILE 2>/dev/null`

    NEWIP=`curl -s ip4.me/api/ | md5sum - | awk '{print $1}'`
    if [ "x$DEBUG" != "x" ]
    then
        echo Current IP:  `curl -s ip4.me/api/`
    fi
    
    # Check to see if the IP address has changed
    if [ "${OLDIP}" != "${NEWIP}" ]
    then
        echo New IP detected
        curl -s -b $COOKIEFILE -c $COOKIEFILE https://t.myanonamouse.net/json/dynamicSeedbox.php > /tmp/MAM.output

        # CRITICAL FIX: Restore mam_id if curl wiped it
        ensure_mam_id

        grep -E 'No Session Cookie|Invalid session' /tmp/MAM.output > /dev/null 2>/dev/null
        if [ $? -eq 0 ]
        then
            echo response: `cat /tmp/MAM.output`
            echo Current cookie file is invalid.
            # We don't exit here anymore, we just loop and let ensure_mam_id fix it next time
        fi
    
        # If that command worked, update the CACHEFILE
        grep '"Success":true' /tmp/MAM.output > /dev/null 2>/dev/null
        if [ $? -eq 0 ]
        then
            echo Response:  \"`cat /tmp/MAM.output`\"
            echo $NEWIP > $CACHEFILE
            OLDPID=$NEWIP
        else
            grep 'Last change too recent' /tmp/MAM.output > /dev/null 2>/dev/null
            if [ $? -eq 0 ]
            then
                echo Last update too recent - sleeping
            else
                echo response: `cat /tmp/MAM.output`
                echo Invalid response
            fi
        fi
    else
        echo "No IP change detected: `date`"
    fi
    sleep $SLEEPTIME

    # Empty the IP file if it has not been rotated for more than 30 days
    find $CACHEFILE -mtime +30 -delete
done