This is a collection of dotfiles and scripts for my bspwm setup
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#!/bin/sh
file="/tmp/polybar-btc-module"
# Enable mathematics in POSIX shell
calc() { awk "BEGIN { printf(\"%.2f\", $*) }"; }
data() {
[ -z "$1" ] && return 1
url="$1"
curl --location --request GET --silent "$url"
}
output() {
[ -z "$1" ] && return 1
# Get symbol and color
difference="$1"
possitive=$(calc "$difference >= 0" | cut -c 1)
if [ "$possitive" -eq 1 ]; then
symbol=""
color="$COLOR2"
else
symbol=""
color="$COLOR1"
fi
# Result
echo "%{F$color}$symbol $difference%%{F$COLOR15}"
}
# Get dates
date_last_week_start="$(date --date 'last week' +%s000)"
date_last_week_end=$(calc "$date_last_week_start + (1000 * 60 * 60)") # +1h
date_last_week_end=${date_last_week_end%.00} # cut off ".00" at the end
# API URLs
url="https://api.coincap.io/v2/assets/bitcoin"
url_last_week="${url}/history?interval=h1&start=${date_last_week_start}&end=${date_last_week_end}"
# Current price
data="$(data "$url")"
data_first_character="$(echo "$data" | cut -c 1)"
if [ "$data_first_character" != "{" ]; then cat "$file"; exit; fi
price="$(echo "$data" | jq --compact-output --raw-output '.data.priceUsd')"
price=$(calc "$price")
# Get yesterdays difference
difference_yesterday="$(echo "$data" | jq --compact-output --raw-output '.data.changePercent24Hr')"
difference_yesterday="$(calc "$difference_yesterday")"
# Get last weeks difference
data_last_week="$(data "$url_last_week")"
data_last_week_first_character="$(echo "$data_last_week" | cut -c 1)"
if [ "$data_last_week_first_character" != "{" ]; then cat "$file"; exit; fi
price_last_week="$(echo "$data_last_week" | jq --compact-output --raw-output '.data[0].priceUsd')"
difference_last_week=$(calc "$price / $price_last_week * 100 - 100")
# Create output formatting
difference_yesterday_output="d $(output "$difference_yesterday")"
difference_last_week_output="w $(output "$difference_last_week")"
echo "\$$price $difference_yesterday_output $difference_last_week_output" > "$file"
echo "\$$price $difference_yesterday_output $difference_last_week_output"