112 lines
2.3 KiB
Bash
Executable File
112 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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set -eu
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forecast=~/".cache/jelly-conky/forecast.json"
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get_time () {
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local idx="$1"
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time=$(jq ".list[$idx].dt_txt" "$forecast")
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time="${time##* }"
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time="${time%%\"}"
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echo "$time"
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}
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find_position () {
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local day="$1"
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local pos=0
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local idx=0
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local time=""
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[[ $day == 0 ]] && echo "$idx" && return
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while true; do
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time=$(get_time "$idx")
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[[ $time == "00:00:00" ]] && ((pos++))
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[[ $time == "null" ]] && break
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[[ $pos == "$day" ]] && break
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((idx++))
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done
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echo "$idx"
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}
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# Currently, the free accounts on openweathermap.org only get a 5 day forecast
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# with data records for every 3 hours instead of the average value for the day,
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# so we have to compute the average temp_min, temp_max, etc manually.
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get_avg_property () {
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local res=0
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local prop="$1"
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local day="$2"
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local idx
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idx=$(find_position "$day")
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local prop_num=0
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local time=0
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local it=0
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while true; do
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[[ $time == "null" ]] && break
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it=$(jq ".list[$idx]$prop" "$forecast")
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it="$res+$it"
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res=$(bc -l <<< "$it")
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(( prop_num++ ))
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(( idx++ ))
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time=$(get_time "$idx")
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# The records for every 3 hours are dumped in an array with no
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# indication to which day they belong.
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# The first record of each day (except today) is calculated at time
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# '00:00:00', so we use that to know when a new day starts.
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[[ $time == "00:00:00" ]] && break
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done
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res="$(bc -l <<< "$res/$prop_num")"
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[[ $res == "null" ]] && echo $res && return
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LC_NUMERIC=C printf %.0f $res
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}
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# Certain values cannot be averaged (e.g., the weather description).
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# In that case we just use the value from the first record for that day.
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get_first_property () {
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local res=0
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local prop="$1"
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local day="$2"
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local idx
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idx=$(find_position "$day")
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res=$(jq ".list[$idx]$prop" "$forecast")
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[[ $res == "null" ]] && echo $res && return
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LC_NUMERIC=C printf %.0f $res
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}
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main () {
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type="$1"
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prop="$2"
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day="$3"
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if [[ $type == "avg" ]] ; then
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echo "$(get_avg_property "$2" "$3")"
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elif [[ $type == "first" ]] ; then
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echo "$(get_first_property "$2" "$3")"
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fi
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}
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[[ -r $forecast ]] && main "$@"
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