shell_functions

#!/usr/bin/env bash

# -------------------------------------------------------------------------------------
# Shell stuff
# -------------------------------------------------------------------------------------

# Always list directory contents upon 'cd'
function cd() { 
	builtin cd "$@"; ll; 
}

# Create a new directory and enter it
function mkd() {
	mkdir -p "$@" && cd "$_";
}

# Moves a file to the MacOS trash
function trash () { 
	command mv "$@" ~/.Trash ; 
}

# Opens any file in MacOS Quicklook Preview
function ql () { 
	qlmanage -p "$*" >& /dev/null; 
}

# Change working directory to the top-most Finder window location
function cdf() { # short for `cdfinder`
	cd "$(osascript -e 'tell app "Finder" to POSIX path of (insertion location as alias)')";
}

# Shell switch [bash|zsh]
# Must be in /etc/shells
function shellswitch () {
	chsh -s $(brew --prefix)/bin/$1
}

# Find shorthand
function f() {
	find . -name "$1" 2>&1 | grep -v 'Permission denied'
}

# Quickly find files that contain a string in a directory
function qfind () {
	find . -exec grep -l -s $1 {} \;
	return 0
}

# Copy with progress
function cp_p () {
	rsync -WavP --human-readable --progress $1 $2
}

# List all files, long format, colorized, permissions in octal
function la() {
	ls -l  "$@" | awk '
	{
      k=0;
      for (i=0;i<=8;i++)
        k+=((substr($1,i+2,1)~/[rwx]/) *2^(8-i));
      if (k)
        printf("%0o ",k);
      printf(" %9s  %3s %2s %5s  %6s  %s %s %s\n", $3, $6, $7, $8, $5, $9,$10, $11);
    }'
}

# Extract archives - use: extract <file>
# Based on http://dotfiles.org/~pseup/.bashrc
function extract() {
	if [ -f "$1" ] ; then
		local filename=$(basename "$1")
		local foldername="${filename%%.*}"
		local fullpath=`perl -e 'use Cwd "abs_path";print abs_path(shift)' "$1"`
		local didfolderexist=false
		if [ -d "$foldername" ]; then
			didfolderexist=true
			read -p "$foldername already exists, do you want to overwrite it? (y/n) " -n 1
			echo
			if [[ $REPLY =~ ^[Nn]$ ]]; then
				return
			fi
		fi
		mkdir -p "$foldername" && cd "$foldername"
		case $1 in
			*.tar.bz2) tar xjf "$fullpath" ;;
			*.tar.gz) tar xzf "$fullpath" ;;
			*.tar.xz) tar Jxvf "$fullpath" ;;
			*.tar.Z) tar xzf "$fullpath" ;;
			*.tar) tar xf "$fullpath" ;;
			*.taz) tar xzf "$fullpath" ;;
			*.tb2) tar xjf "$fullpath" ;;
			*.tbz) tar xjf "$fullpath" ;;
			*.tbz2) tar xjf "$fullpath" ;;
			*.tgz) tar xzf "$fullpath" ;;
			*.txz) tar Jxvf "$fullpath" ;;
			*.zip) unzip "$fullpath" ;;
			*) echo "'$1' cannot be extracted via extract()" && cd .. && ! $didfolderexist && rm -r "$foldername" ;;
		esac
	else
		echo "'$1' is not a valid file"
	fi
}

# get gzipped size
function gz() {
	echo "orig size    (bytes): "
	cat "$1" | wc -c
	echo "gzipped size (bytes): "
	gzip -c "$1" | wc -c
}

# visual studio code. a la `subl`
#code () { VSCODE_CWD="$PWD" open -n -b "com.microsoft.VSCodeInsiders" --args $*; }

# -------------------------------------------------------------------------------------
# Network stuff
# -------------------------------------------------------------------------------------
 
# Start an HTTP server from a directory, optionally specifying the port
function server() {
	local port="${1:-8000}"
	open "http://localhost:${port}/"
	# Set the default Content-Type to `text/plain` instead of `application/octet-stream`
	# And serve everything as UTF-8 (although not technically correct, this doesn’t break anything for binary files)
	python -c $'import SimpleHTTPServer;\nmap = SimpleHTTPServer.SimpleHTTPRequestHandler.extensions_map;\nmap[""] = "text/plain";\nfor key, value in map.items():\n\tmap[key] = value + ";charset=UTF-8";\nSimpleHTTPServer.test();' "$port"
}

# whois a domain or a URL
function whois() {
	local domain=$(echo "$1" | awk -F/ '{print $3}') # get domain from URL
	if [ -z $domain ] ; then
		domain=$1
	fi
	echo "Getting whois record for: $domain …"
	
	# avoid recursion
	# this is the best whois server
	# strip extra fluff
	/usr/bin/whois -h whois.internic.net $domain | sed '/NOTICE:/q'
}

function localip() {
	function _localip() { echo "📶  "$(ipconfig getifaddr "$1"); }
	export -f _localip
	local purple="\x1B\[35m" reset="\x1B\[m"
	networksetup -listallhardwareports | \
		sed -r "s/Hardware Port: (.*)/${purple}\1${reset}/g" | \
		sed -r "s/Device: (en.*)$/_localip \1/e" | \
		sed -r "s/Ethernet Address:/📘 /g" | \
		sed -r "s/(VLAN Configurations)|==*//g"
}

# -------------------------------------------------------------------------------------
# Camera and media stuff
# -------------------------------------------------------------------------------------
 
# who is using the laptop's iSight camera?
function camerausedby () {
	echo "Checking to see who is using the iSight camera… 📷"
	usedby=$(lsof | grep -w "AppleCamera\|USBVDC\|iSight" | awk '{printf $2"\n"}' | xargs ps)
	echo -e "Recent camera uses:\n$usedby"
}

# Animated gifs from any video
# From: Alex Sexton http://gist.github.com/SlexAxton/4989674
function gifify () {
	if [[ -n "$1" ]]; then
	if [[ $2 == '--good' ]]; then
		ffmpeg -i "$1" -r 10 -vcodec png out-static-%05d.png
		time convert -verbose +dither -layers Optimize -resize 900x900\> out-static*.png  GIF:- | gifsicle --colors 128 --delay=5 --loop --optimize=3 --multifile - > "$1.gif"
		rm out-static*.png
	else
		ffmpeg -i "$1" -s 600x400 -pix_fmt rgb24 -r 10 -f gif - | gifsicle --optimize=3 --delay=3 > "$1.gif"
	fi
	else
		echo "proper usage: gifify <input_movie.mov>. You DO need to include extension."
	fi
}

# Turn that video into webm.
# brew reinstall ffmpeg --with-libvpx
function webmify () {
	ffmpeg -i "$1" -vcodec libvpx -acodec libvorbis -isync -copyts -aq 80 -threads 3 -qmax 30 -y "$2" "$1.webm"
}

# -------------------------------------------------------------------------------------
# Git stuff
# -------------------------------------------------------------------------------------

# List git branches on the local machine sorted by recent updates, adding a star to remote tracking branches
function git_list_branches() {
  RED="\e[91m";
  for branch in $(git branch | sed s/^..//); do
    time_ago=$(git log -1 --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $branch --);
    # Add a red star to mark branches that are tracking something upstream
    tracks_upstream=$(if [ "$(git rev-parse $branch@{upstream} 2>/dev/null)" ]; then printf "$RED★"; fi);
    printf "%-53s - %s %s\n" $time_ago $branch $tracks_upstream;
  done | sort;
}