Shell convenience script for ShareXen

sharexen.sh

#!/bin/sh

# Shell convenience script for ShareXen
# Source: https://github.com/Xenthys/ShareXen

# GNU/Linux dependencies: jq curl maim xclip notify-send
# - jq: parse ShareXen API JSON results
# - curl: query the ShareXen API itself
# - maim: take screenshots
# - xclip: copy URL to clipboard
# - notify-send: notify once uploaded

# OSX dependencies: jq curl screencapture pbcopy terminal-notifier
# - jq: parse ShareXen API JSON results
# - curl: query the ShareXen API itself
# - screencapture: take screenshots
# - pbcopy: copy URL to clipboard
# - terminal-notifier: notify once uploaded

######################
# USER CONFIGURATION #
######################

ADDRESS='https://your.domain/sharexen.php'
TOKEN='change-me'

#[ Settings below are optional ]#
#[  and can be empty or unset  ]#

# Save generated URLs
LOGFILE="$HOME/.sharexen.log"

# Locally store screenshots
FOLDER="$HOME/Pictures/ShareXen"

#############################
# END OF USER CONFIGURATION #
#############################


is_mac()
{
	uname | grep -q "Darwin"
}

notify()
{
	if is_mac
	then
		if command_exists "terminal-notifier"
		then
			note=$(echo $1 | sed 's/\\n/ /g')
			terminal-notifier -title "ShareXen" -message "$note"
		fi
	else
		if command_exists "notify-send"
		then
			notify-send "ShareXen" "$1"
		fi
	fi
}

log()
{
	MSG="[$(date '+%Y-%m-%d %T')] $1"

	if [ -z "${1##Error:*}" ]
	then
		notify "$1"
		echo >&2 "$MSG"
	else
		echo "$MSG"
	fi

	[ -z "$LOGFILE" ] || echo "$MSG" >> "$LOGFILE" 2>/dev/null
}

command_exists()
{
	command -v "$1" >/dev/null 2>&1
}

ensure_command_exists()
{
	for cmd in "$@"
	do
		if ! command_exists "$cmd"
		then
			log "Error: $cmd is required but not installed. Aborting."
			exit 1
		fi
	done
}

ensure_command_exists "jq" "curl"

capture()
{
	if is_mac
	then
		ensure_command_exists "screencapture"
		screencapture -io "$1"
	else
		ensure_command_exists "maim"
		maim -us "$1"
	fi
}

clipboard()
{
	result="$(echo "$1" | tr -d "\r\n")"

	if is_mac
	then
		if ! command_exists "pbcopy"
		then
			return 1
		fi
		echo "$result" | pbcopy
	else
		if ! command_exists "xclip"
		then
			return 1
		fi
		echo "$result" | xclip -i -sel c -f | xclip -i -sel p
	fi
}

if [ -z "$UPLOAD_FILE" ]
then
	NAME="sharexen_${USER}_$(date +%s%N).png"
	cd "/tmp" && capture "$NAME" || exit 2
else
	[ -f "$UPLOAD_FILE" ] && NAME="$UPLOAD_FILE" || exit -1
fi

PRMS="-sL -F endpoint=upload"

[ $# -gt 0 ] && PRMS="$PRMS -F filename=$1"

if ! RES=$(curl $PRMS -F "image=@$NAME" -F "token=$TOKEN" "$ADDRESS")
then
	log "Error: upload failed (curl). Please check your token and script address."
	exit 3
fi

STATUS=$(echo "$RES" | jq -r ".status")

if [ "$STATUS" = "success" ]
then
	URL=$(echo "$RES" | jq -r ".url")
	DEL=$(echo "$RES" | jq -r ".deletion_url")

	MSG="Image uploaded"
	
	if clipboard "$URL"
	then
		MSG="$MSG and URL copied to clipboard"
	else
		MSG="$MSG successfully"
	fi
	
	notify "$MSG.\nLink: $URL"
	log "Uploaded $URL successfully. Deletion URL: $DEL"

	[ -z "$UPLOAD_FILE" ] || exit 0

	if [ -z "$FOLDER" ]
	then
		rm "$NAME" 2>/dev/null
	else
		mkdir -p "$FOLDER" && cd "$FOLDER" || exit 4
		mv "/tmp/$NAME" "$(echo "$RES" | jq -r ".filename")" || exit 5
	fi
else
	ERR=$(echo "$RES" | jq -r ".error")
	log "Error: upload failed ($ERR)."
	exit 6
fi