get current location's current weather

weather.sh

#! /bin/bash
#set -x

VERSION="1.6.1"

JQ_BIN=jq

LAST_TIME_FILE='/tmp/wea_last_time'
LAST_WEATHER='/tmp/wea_last_weather'

MAX_TIME_GAP=2000

function error()
{
    now=`date +"%Y/%m/%d %H:%M:%S"`
    echo "${now} [ERROR] --> $1" >> /tmp/weather_log
}

function info()
{
    now=`date +"%Y/%m/%d %H:%M:%S"`
    echo "${now} [INFO] --> $1" >> /tmp/weather_log
}

function queryWeather()
{
    local data=`https_proxy= curl -s "https://www.tianqiapi.com/api/?version=v6&appid=76961778&appsecret=K1Evb4rc"`
    local moon=`http_proxy= curl -s 'http://zh.wttr.in?format=%m&period=60'`

    echo "" >> /tmp/weather_log
    echo "" >> /tmp/weather_log
    info "$data"
    info "$moon"

    if [ -z "$data" ] #-o -z "$moon" -o ${#moon} -ge "10" ]
    then
        echo -n ""
    else
        extractWeather "$data" "$moon"
    fi
}

function extractWeather()
{
    local data=$1
    local moon=$2
    local city=`echo -n $data | $JQ_BIN -cMr '.city'`

    if [ -z "$city" ]
    then
        error "extract city error. $data"
        echo "$data" > /tmp/weather_data_log
        exit -1
    fi
    info "[city]        $city"

    local wea=`echo -n $data | $JQ_BIN -cMr '.wea'`
    local wea_img=''
    case `echo -n $data | $JQ_BIN -cMr '.wea_img'` in
        lei) wea_img='⚡️';;
        qing) wea_img='☀️  ';;
        shachen) wea_img='😷 ';;
        wu) wea_img='🌫 ';;
        xue) wea_img='❄️ ';;
        yu) wea_img='🌧 ';;
        yujiaxue) wea_img='🌨 ';;
        yun) wea_img='⛅️ ';;
        zhenyu) wea_img='🌧 ';;
        yin) wea_img='☁️ ';;
        bingbao) wea_img='🧊 ';;
        *) wea_img='';;
    esac

    if [ -z "$wea" ]
    then
        error "extract weather error. $data"
        exit -1
    fi
    info "[weather]     $wea_img $wea"

    local air_pm25=`echo -n $data | $JQ_BIN -cMr '.air_pm25'`
    local air_level=`echo -n $data | $JQ_BIN -cMr '.air_level'`

    if [ -z "$air_pm25" -o -z "$air_level" ]
    then
        error "extract air error. $data"
        exit -1
    fi
    info "[air]         $air_pm25 $air_level"

    local humidity=`echo -n $data | $JQ_BIN -cMr '.humidity'`

    if [ -z "$humidity" ]
    then
        error "extract humidity error. $data"
        exit -1
    fi
    info "[humidity]    $humidity"

    local tem=`echo -n $data | $JQ_BIN -cMr '.tem'`

    if [ -z "$tem" ]
    then
        error "extract temperature error. $data"
        exit -1
    fi
    info "[temperature] $tem"

    local pressure=`echo -n $data | $JQ_BIN -cMr '.pressure'`

    if [ -z "$pressure" ]
    then
        error "extract pressure error. $data"
        exit -1
    fi
    info "[pressure]    $pressure"

    local visibility=`echo -n $data | $JQ_BIN -cMr '.visibility'`

    if [ -z "$visibility" ]
    then
        error "extract visibility error. $data"
        exit -1
    fi
    info "[visibility]  $visibility"

    local win_speed=`echo -n $data | $JQ_BIN -cMr '.win_speed'`
    local win_meter=`echo -n $data | $JQ_BIN -cMr '.win_meter'`
    local win=`echo -n $data | $JQ_BIN -cMr '.win'`
    local win_arrow=''
    case $win in
        东南风) win_arrow='↖';;
        南风) win_arrow='↑';;
        西南风) win_arrow='↗';;
        东风) win_arrow='←';;
        西风) win_arrow='→';;
        东北风) win_arrow='↙';;
        北风) win_arrow='↓';;
        西北风) win_arrow='↘';;
        *) win_arrow='';;
    esac

    if [ -z "$win_speed" -o -z "$win" ]
    then
        error "extract wind error. $data"
        exit -1
    fi
    info "[wind]        $win_arrow $win_speed $win_meter"

    echo -n "$city: $wea_img$wea ${tem}℃ $humidity $win_arrow $win_speed [$air_pm25]$air_level $moon $visibility"
}

function queryAndUpdateCache()
{
    weather=`queryWeather`

    if [ -z "$weather" ]
    then
        rm -rf "$LAST_TIME_FILE"
        rm -rf "$LAST_WEATHER"
        echo -n "request error"
    else
        echo -n "$weather" > "$LAST_WEATHER"
        echo -n "$currentTime" > "$LAST_TIME_FILE"
    fi
}

if [ ! -f $LAST_TIME_FILE ]
then
    echo -n "0" > "$LAST_TIME_FILE"
fi

lastTime=`cat $LAST_TIME_FILE 2>/dev/null`
currentTime=`date +%s`
gap=$[currentTime-lastTime]

case $1 in
    --update-time)
        lastTimeStr=`date -r $lastTime +"%Y/%m/%d %H:%M:%S"`
        echo "Last Time: $lastTimeStr"
        nextTimeStr=`date -r $[lastTime+MAX_TIME_GAP] +"%Y/%m/%d %H:%M:%S"`
        echo "Next Time: $nextTimeStr"
        leftSeconds=$[MAX_TIME_GAP-gap]
        echo "Left Seconds: ${leftSeconds}s"
        exit 0
        ;;
    -f|--force)
        queryAndUpdateCache
        ;;
    -h|--help)
        echo "Weather.sh - print current location's current weather."
        echo "Usage: weather.sh"
        echo "   or: weather.sh -f"
        echo ""
        echo "Arguments:"
        echo "  --update-time        show updating time of the cache"
        echo "  -f  or  --force      force update weather and print (do not use cache)"
        echo "  -h  or  --help       Print Help (this message) and exit"
        echo "  -v  or  --version    Print version information and exit"
        echo ""
        exit 0
        ;;
    -v|--version)
        echo "Weather.sh v$VERSION"
        exit 0
        ;;
    *)
        ;;
esac

if [ $gap -ge $MAX_TIME_GAP ]
then
    queryAndUpdateCache
fi

cat "$LAST_WEATHER" 2>/dev/null