#!/bin/bash

cd "$(dirname "$0")" # Go to the script's directory

# Detect if this is the first item and write a comma if it is.
# Normally, I would track this using a variable, like so:
#
# COMMA_IF_NOT_FIRST_FLAG=false
# COMMA_IF_NOT_FIRST() {
#     $COMMA_IF_NOT_FIRST || echo ","
#     COMMA_IF_NOT_FIRST_FLAG=true
# }
#
# Since this function executes in a subshell, that approach will not work.
# Instead, we peek inside mo and see what is being processed. If the variable
# name in moParse() changes, this will need to get updated as well. An
# alternate variable that is usable is context, but that is in moLoop() and is
# two levels levels deep instead of just one.
COMMA_IF_NOT_FIRST() {
    [[ "${moCurrent#*.}" != "0" ]] && echo ","
}

# Create an array that will be embedded into the JSON. If you are manipulating
# JSON, might I suggest you look at using jq? It's really good at processing
# JSON.
items=(
    '{"position":"one","url":"1"}'
    '{"position":"two","url":"2"}'
    '{"position":"three","url":"3"}'
)
. ../mo
cat <<EOF | mo
{
    {{#items}}
    {{COMMA_IF_NOT_FIRST}}
    {{.}}
    {{/items}}
}
EOF