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#!/bin/sh
# Usage:
# price <currency-base currency> <name of currency> <icon> <signal>
# price bat-btc "Basic Attention Token" 🦁 24
# This will give the price of BAT denominated in BTC and will update on
# signal 24.
# When the name of the currency is multi-word, put it in quotes.
[ -z "$1" ] && exit 1
url="${CRYPTOURL:-rate.sx}"
target="${1%%-*}"
denom="${1##*-}"
name="${2:-$1}"
icon="${3:-💰}"
case "$denom" in
"$target"|usd) denom="usd"; symb="$" ;;
gbp) symb="£" ;;
eur) symb="€" ;;
btc) symb="" ;;
esac
interval="@14d" # History contained in chart preceded by '@' (7d = 7 days)
dir="${XDG_CACHE_HOME:-$HOME/.cache}/crypto-prices"
pricefile="$dir/$target-$denom"
chartfile="$dir/$target-$denom-chart"
filestat="$(stat -c %x "$pricefile" 2>/dev/null)"
[ -d "$dir" ] || mkdir -p "$dir"
updateprice() { curl -sf -m 1 --fail-early $denom.$url/{1$target,$target$interval} --output "$pricefile" --output "$chartfile" ||
rm -f "$pricefile" "$chartfile" ;}
[ "${filestat%% *}" != "$(date '+%Y-%m-%d')" ] &&
updateme="1"
case $BLOCK_BUTTON in
1) setsid "$TERMINAL" -e less -Srf "$chartfile" ;;
2) notify-send -u low "$icon Updating..." "Updating $name price..." ; updateme="1" ; showupdate="1" ;;
3) uptime="$(date -d "$filestat" '+%D at %T' | sed "s|$(date '+%D')|Today|")"
notify-send "$icon $name module" "\- <b>Exact price: \$$(cat "$pricefile")</b>
- Left click for chart of changes.
- Middle click to update.
- Shows 🔃 if updating prices.
- <b>Last updated:
$uptime</b>" ;;
6) setsid -f "$TERMINAL" -e "$EDITOR" "$0" ;;
esac
[ -n "$updateme" ] &&
updateprice "$target" &&
[ -n "$showupdate" ] &&
notify-send "$icon Update complete." "$name price is now
\$$(cat "$pricefile")"
[ -f "$pricefile" ] && printf "%s%s%0.2f" "$icon" "$symb" "$(cat "$pricefile")"
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