Helper to monitor network stats (speedtest_cli) via TheDash.com

app.rb

#!/usr/bin/env ruby
DESTINATION         = "#{Dir.home}/Dropbox/Public/TheDash"
SPEEDTEST_CLI_EXEC  = 'speedtest_cli'
SPEEDTEST_CLI_FLAGS = '--simple'
# You can add --server ID to use always the same server (for full list see speedtest_cli --help)
# Ex:
# 2487) TVA - Comercial Cabo TV São Paulo (Sao Paulo, Brazil) [19.00 km]
# 3068) TIM Brasil (Sao Paulo, Brazil) [19.00 km]
# 3971) America Net (Barueri, Brazil) [36.96 km]
# 4003) T-Systems Brasil (Barueri, Brazil) [36.96 km]
# 3298) Louvetel Comunicação Comercial Ltda. (Louveira, Brazil) [75.67 km]

def extract_data( data )
    regex = '(?<value>[[:digit:].]+) (?<unit>[[:alpha:]\/]+)'
    {
        ping:      /^Ping: #{regex}$/.match( data ),
        upload:    /^Upload: #{regex}$/.match( data ),
        download:  /^Download: #{regex}$/.match( data )
    }
end

def data_to_json( data )
    value = data[:value].to_f.round( 1 )
    unit  = data[:unit]
    unit = 'Mbps' if unit == 'Mbits/s'
    "{\"value\":#{value},\"formatted\":\"#{value} #{unit}\"}\n"
end

def data_to_csv( *data )
	values = data.map {|i| i[:value].to_f.round( 1 ) }
	time   = Time.now.strftime( '%m/%d %H:%M' )
	"#{time},#{values.join( ',' )}\n"
end

def write_to_file( contents, filename, mode = 'w' )
    File.open( "#{DESTINATION}/#{filename}", mode ) do |f|
        f.write contents
    end
end

speedtest_bin = %x{which #{SPEEDTEST_CLI_EXEC}}.chomp
fail( "#{Time.now} - #{SPEEDTEST_CLI_EXEC} not found" ) if $?.exitstatus != 0

output = %x{#{speedtest_bin} #{SPEEDTEST_CLI_FLAGS}}
fail( "#{Time.now} - #{SPEEDTEST_CLI_EXEC} error: #{output}" ) if $?.exitstatus != 0

# parse data
data = extract_data( output )
# json
ping_json     = data_to_json( data[:ping] )
download_json = data_to_json( data[:download] )
upload_json   = data_to_json( data[:upload] )
# csv
ping_csv   = data_to_csv( data[:ping] )
speeds_csv = data_to_csv( data[:download], data[:upload] )

# write json
write_to_file( ping_json,     'ping.json' )
write_to_file( download_json, 'download.json' )
write_to_file( upload_json,   'upload.json' )
# write csv
write_to_file( ping_csv,   'ping.csv',   'a' )
write_to_file( speeds_csv, 'speeds.csv', 'a' )

__END__
1. Install speedtest_cli (brew or https://github.com/sivel/speedtest-cli)
2. Configure app.rb header
3. Create this plist at: ~/Library/LaunchAgents/org.trovilho.speedtest_the_dash.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
	<dict>
		<key>Label</key>
		<string>org.trovilho.speedtest_the_dash</string>
		<key>ProgramArguments</key>
		<array>
			<string>/PATH/TO/BIN/speedtest_the_dash/app.rb</string>
		</array>
		<key>StartInterval</key>
		<integer>900</integer>
	</dict>
</plist>
4. Load with: launchctl load org.trovilho.speedtest_the_dash.plist
5. Configure The Dash: https://www.thedash.com/