.dotfiles/zsh/scripts

#--------------------------------
# filename:     /zsh/scripts
#--------------------------------

# Search for string in all files in pwd
function f() {
    grep -rnw ./ -e "$1"
}

# mkdir and cd
function mkcd() {
    mkdir -p "$@" && cd "$_" || exit;
}

# "Fake" sha256sum
if [[ ! -x $(which sha256sum) ]]; then
    function sha256sum() {
        shasum -a256 "$1"
    }
fi

# Tar.gz with GZIP or PIGZ
function targz() {
    if [ -z "$1" ]; then
        echo "usage: targz filename.tar.gz directory"
        return
    fi
    if [[ ! -x $(which pigz) ]]; then
        tar -czf "$1" "$2"
	echo "gzip"
    else
        tar -c "$2" | pigz > "$1"
	echo "pigz"
    fi
}

# Export manpage as PDF
function manp() {
    man -t $1 | pstopdf -o $TMPDIR/$1.pdf && open $TMPDIR/$1.pdf && sleep 1 && rm $TMPDIR/$1.pdf 
}

# pushover notification
function pushover() {
    curl -s \
    --form-string "token=$pushover_token" \
    --form-string "user=$pushover_user" \
    --form-string "title=$HOST" \
    --form-string "message=$1" \
    https://api.pushover.net/1/messages.json
}

# png to jpg 85
function png2web() {
        findpath=$1
        : "${findpath:="."}"
        find "$findpath" -name '*.png' | while read -r f ; do
            dir=$(dirname "$f");
            file=$(basename "$f");
            name="${file%.*}";
		magick convert "$f" pnm:- | cjpeg -progressive -quality 85 > "$dir/$name.jpg" </dev/null
	rm -f "$f";
    done
}

function jpeg1024() {
        magick "$1" -resize '1024x1024\>' -background black -flatten TGA:- | cjpeg -targo -quality 75 -optimize -progressive -outfile "$1".jpg
}

# Make PDFs look like scanned
# src: https://gist.github.com/andyrbell/25c8632e15d17c83a54602f6acde2724?permalink_comment_id=3295405#gistcomment-3295405
function pdf-like-scanned () {
        OUT=$(basename "$1" .pdf)
        convert -density 150 "$1" -rotate "$([ $((RANDOM % 2)) -eq 1 ] && echo -)0.$(($RANDOM % 4 + 5))" \
                -attenuate 0.4 +noise Multiplicative -attenuate 0.03 +noise Multiplicative -sharpen 0x1.0 \
                -colorspace Gray "$OUT"_scanned.pdf
}

# Extract files
# src: https://github.com/mawalu/dotfiles/blob/master/zsh/.zsh/functions.zsh#L21
function extract () {
    if [ -f "$1" ] ; then
        case $1 in
            *.tar.bz2) tar xjf "$1" ;;
            *.tar.gz) tar xzf "$1" ;;
            *.bz2) bunzip2 "$1" ;;
            *.rar) unrar x "$1" ;;
            *.gz) gunzip "$1" ;;
            *.tar) tar xf "$1" ;;
            *.tbz2) tar xjf "$1" ;;
            *.tbz) tar xjf "$1" ;;
            *.tgz) tar xzf "$1" ;;
            *.zip) unzip "$1" ;;
            *.Z) uncompress "$1" ;;
            *.7z) 7z x "$1" ;;
            *) echo "'$1' cannot be extracted via extract()" ;;
        esac
    else
        echo "'$1' is not a valid file"
    fi  
}

# Download provided url to $HOME/Downloads
function dl() {
    if [ -z "$1" ]; then
        echo "usage: dl url (directory)"
        return
    fi
    if [[ -x $(which aria2) ]]; then
        aria2c --dir="$HOME/Downloads" --continue=true --max-connection-per-server=5 "$1"
    else
        (cd "$HOME/Downloads" && curl -O "$1")
    fi
}

# Monitor IP/Host and report with Pushover
pnotify-online() {
    local ip_address="$1"
	echo "Monitoring $ip_address …"

    while true; do
        if ping -c 1 -W 1 "$ip_address" >/dev/null; then
			echo "$1 is online now."
            pushover "$1 is online now."
            break
        fi
    done
}

pnotify-offline() {
    local ip_address="$1"
    echo "Monitoring $ip_address …"
    
    while true; do
        if ! ping -c 1 -W 1 "$ip_address" >/dev/null; then
			echo "$1 is offline now."
            pushover "$1 is offline now."
            break
        fi
    done
}