#! /bin/bash
# KiwiSDR.com receiver list extractor for dyatlov map maker
# Copyright 2017 Pierre Ynard
# Licensed under GPLv3+
#
# This script fetches the KiwiSDR.com receiver list, parses it, and
# updates a javascript file with the extracted data, to be sourced by
# the dyatlov map maker. It can run interactively, or in an automated
# way.
#
# The target directory for the javascript data files can be passed
# as an optional first argument to the script; by default, the
# script directory will be used. If setting up automated updates, it
# is strongly recommended for security reasons to use a separate,
# unprivileged target directory.

# Input and output configuration
SOURCE_URL='http://rx.linkfanel.net/kiwisdr_com.js'

JS_FILENAME='kiwisdr_com.js'
extra_js=(new-888-data.js static_rx.js)

# Target data files
prev_js="${JS_FILENAME}"
new_js="${JS_FILENAME}.tmp"

# Check dependencies, probe available features and switch color output
if ! which wget >/dev/null 2>&1; then
    echo 'Cannot find `wget`, aborting. This script requires `wget`, please install it.' >&2
    exit 1
fi

# Cleaning this up may be more robust
rm -f "$new_js"

wget \
    -nv \
    -e robots=off \
    --user-agent="Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0" \
    -O "$new_js" -- "$SOURCE_URL"

# Update data and include the extra servers
head -n -2 "$new_js" | sed '/^\]/d' | sed '/^;/d' | sed 's/ ":" / : /g' >"$prev_js"

for ITEM in ${extra_js[@]}; do
    \cat $ITEM | sed '/^\//d' | sed '/^\[/d'| sed '/^\]/d' | sed '/^;/d' | sed '/^$/d' | sed '/^var/d' | sed 's/ ":" / : /g' >>"$prev_js"
done

echo -e "]\n;" >>"$prev_js"


[ -f "$new_js" ] && rm "$new_js"