#!/bin/bash

FILE_TRASH="/dev/null"
DB_PATH="./data/"

# errors :
# 1 file do not exist
# 2 entry do not exist
#
# ok :
# 0 entry exist
function check_in_db {

    db_name="${1}"
    search_id="${2}"

    [ -f "${DB_PATH}${db_name}.db" ] || return 1
    cat "${DB_PATH}${db_name}.db" | \
      grep -E "^${search_id}" > "${FILE_TRASH}" || return 2
    return 0
}

function add_in_db {

    db_name="${1}"
    shift 1
    
    local IFS=";"
    echo "$*" >> ${DB_PATH}${db_name}.db
    return 0

}

function delete_in_db {

    db_name="${1}"
    id="${2}"

    [ "$(uname)" == "Darwin" ] \
        && sed "/^${id}/d" "${DB_PATH}${db_name}.db" -i '' \
        || sed "/^${id}/d" "${DB_PATH}${db_name}.db" -i
    
    return 0

}

# errors :
# 0 file do not exist
#
# ok :
# [1-500] entry count
function count_in_db {

    db_name="${1}"
    id="${2}"

    [ -f "${DB_PATH}${db_name}.db" ] || return 0
    count=$(cat "${DB_PATH}${db_name}.db" | grep "${id}" | wc -l | sed -e 's/ //g')

    return "${count}"

}