#!/bin/bash

# doc chk_nonexistent_ids {
#
# DESCRIPTION
#   chk_nonexistent_ids - Checks if all trackids in DB_FILE points to an existing file. If not, deletes.
#
# USAGE
#   chk_nonexistent_ids </path/to/target/dir> </path/to/db/file/>
#
# }

chk_nonexistent_ids() {
    local TARGET="${1}"
    local DB_FILE="${2}"

    local ERR=false
    local rowList=($(awk 'BEGIN{RS="\n";FS="\t";OFS="="}{if($1!="LAST_UPDATE" || $1!="LAST_DEPLOY"){print $2,$3,$4}}' "${DB_FILE}"))

    local COUNT=1
    for row in ${rowList[@]}; do
        local IMAGEID="$(cut -d"=" -f1 <<< ${row})"
        local TRACKID="$(cut -d"=" -f2 <<< ${row})"
        local FILE="$(cut -d"=" -f3 <<< ${row})"
         
        echo "[ ${COUNT} / ${#rowList[@]} ] Checking path of ${TRACKID}"

        if [[ ! -f "${TARGET}/${FILE}" ]] && [[ ${FILE} != "null" ]]; then
            gawk -i inplace -v imageid=${IMAGEID} -v trackid=${TRACKID} 'BEGIN{FS="\t";OFS="\t"}{if($2==imageid && $3==trackid){$4="null"}{print $0}}' ${DB_FILE}
            local $?=1
        fi
        [[ $? -eq 0 ]] || { echo "[>>>>>>] Error reported"; echo "${TRACKID} of ${IMAGEID} points to non-existent file"}; local ERR=true; }
        local COUNT=$(( ${COUNT} + 1 ))
    done
    [[ "${ERR}" == "true" ]] && return 1 || return 0

}