How I am using bemenu with [ID] at line ends

In this script I am utilizing the psql to get list items from the PostgreSQL database. List items are then listed as:

• Some choice [1]
• Some choice [2]
• Some choice [3]

and then I am using

string_cut_id() {
    sed -n 's/\(.*\)\[\(.*\)\]$/\2/p'
}

to cut the ID from [ID] at line ends. By using the ID I am then taking other information from the database. This may be useful for other users.

#!/bin/bash

# Because Bemenu is installed by using Guix, I have to remove $LD_LIBRARY_PATH
unset LD_LIBRARY_PATH

export BEMENU_BACKEND=curses

fuzzy_program="bemenu -i"

if test $TERM = "dumb" && test $DISPLAY; then
    BEMENU_BACKEND=x11;
    # BEMENU_SCALE=1.4;
    fuzzy_program='bemenu -i -b -l 10 -nb yellow -nb black --fn "DejaVu Mono 20"'
fi

#  

rcd_sql() {
    psql -AXtqc "$1"
}

string_cut_id() {
    sed -n 's/\(.*\)\[\(.*\)\]$/\2/p'
}

fuzzy_id() {
    $fuzzy_program | string_cut_id
}

rcd_accounts_list() {
    rcd_sql "SELECT accounts_name || ' [' || accounts_id || ']' FROM accounts ORDER BY accounts_name"
}

rcd_account() {
    id=$(rcd_accounts_list | fuzzy_id)
    echo $id
}

hyperdocument_affiliate_list() {
    rcd_sql "SELECT hlinks_name || ' [' || hlinks_id || ']' FROM hlinks WHERE hlinks_parent = 35720"
}

hyperdocument_affiliate() {
    id=$(hyperdocument_affiliate_list | fuzzy_id)
    rcd_sql "SELECT hlinks_name || ' 
' || hlinks_link FROM hlinks WHERE hlinks_id = `echo -n $id`"
}

hyperdocument_set_list() {
    rcd_sql "SELECT hlinks_name || ' [' || hlinks_id || ']' FROM hlinks WHERE hlinks_hlinktypes = 5 ORDER BY hlinks_name"
}

hyperdocument_set() {
    id=$(hyperdocument_set_list | fuzzy_id)
    echo $id
}

arg=$1

case $arg in
    'account') rcd_account       ;;
    'set') hyperdocument_set ;;
    'affiliate' ) hyperdocument_affiliate ;;
    *) echo "No recognized parameter"
       exit 0 ;;
esac