watch_upload.sh

#!/bin/bash

#
# This script watches the local folder for files with the ending in 'file_endings'
# and uploads them to a server specified in 'server'.
#


server_name=""   # include login name if necessary
target_directory=""
file_endings=( "jpg" "png" )

is_in_array ()
{
    for v in ${@:2}
    do
        if [[ $v == $1 ]]
        then
            return 1
        fi
    done
    return 0
}

upload_file ()
{
    echo "Uploading "$1
    scp $1 "${server_name}:${target_directory}"
}

clean_up ()
{
    printf "\nBye"
}

files_uploaded=()
script_name=$( echo $0 | sed 's/.\///g' )

trap clean_up EXIT

# Colors
NC='\033[0m'        # no color
RED='\033[0;31m'
GREEN='\033[0;32m'
Yellow='\033[1;33m'

printf "Press CTRL-C to stop.\n"
printf "Checking if ssh connection to $server_name is available..."

status=$(ssh -o BatchMode=yes -o ConnectTimeout=5 $server_name echo ok 2>&1)

if [[ $status == "ok" ]]
then
    printf "Ok\n"
else
    printf "\nConnection not available, did you set up a ssh key for this machine?\n"
    echo $status
    exit 1
fi

printf "${GREEN}Watching files...${NC}\n"

while :
do
    for file in $( ls )
    do
        file_name=$( basename $file )
        file_ending="${file_name##*.}"

        is_in_array $file "${files_uploaded[@]}"
        is_file_old=$?

        is_in_array $file_ending ${file_endings[@]}
        is_ending_correct=$?

        if [[ $is_file_old == 0 && $is_ending_correct == 1 ]]
        then
            upload_file $file

            if [[ $? != 0 ]]
            then
                printf "${RED}There was an error uploading ${file}!${NC}\n" >&2
            else
                files_uploaded=( ${files_uploaded[@]} $file )
                printf "${GREEN}Watching files...${NC}\n"
            fi
        fi    
    done

    sleep 1
done

exit 0