Small script to open a given Youtube URL in embed mode

youtube.embed

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+#!/bin/sh
+
+# Vars {{{
+readonly PROGNAME=$(basename "${0}")
+readonly PROGDIR=$(readlink -m $(dirname "${0}"))
+readonly ARGS="${*}"
+readonly NBARGS="${#}"
+[ -z "${DEBUG}" ] && DEBUG=0
+## Export DEBUG for sub-script
+export DEBUG
+
+## Colors
+readonly PURPLE='\033[1;35m'
+readonly RED='\033[0;31m'
+readonly RESET='\033[0m'
+readonly COLOR_DEBUG="${PURPLE}"
+# }}}
+usage() {                                                       # {{{
+
+	cat <<- EOF
+usage: $PROGNAME
+
+Try to open the given Youtube URL in embed mode in Browser
+
+EXAMPLES :
+    - Try with GhostBuster song
+        ${PROGNAME} https://www.youtube.com/watch?v=_0SeGAi3II8
+
+OPTIONS :
+    -d,--debug
+        Enable debug messages.
+
+    -h,-help
+        Print this help message.
+
+    -u,-url
+        Youtube URL to use.
+
+EOF
+
+}
+# }}}
+define_vars() {                                                 # {{{
+
+	## Test if BROWSER is already defined (by parent script,…)
+	[ -z "${BROWSER}" ] && BROWSER="qutebrowser"
+
+
+	YOUTUBE_EMBED_URL_BASE="https://www.youtube.com/embed/"
+
+	## ID is empty by default
+	YOUTUBE_VIDEO_ID=""
+}
+# }}}
+debug_message() {                                               # {{{
+
+	local_debug_message="${1}"
+
+	## Print message if DEBUG is enable (=0)
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_debug_message}"
+
+	return 0
+}
+# }}}
+error_message() {                                               # {{{
+
+	local_error_message="${1}"
+	local_error_code="${2}"
+
+	## Print message if DEBUG is enable (=0)
+	[ "${DEBUG}" -eq "0" ] && printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}"
+
+	exit "${local_error_code:=66}"
+}
+# }}}
+is_youtube_url() {                                              # {{{
+
+	local_youtube_url="${1}"
+	## By default it's not a valid URL
+	return_is_youtube_url="1"
+
+	if printf -- '%s' "${local_youtube_url}" | grep --quiet --ignore-case --extended-regexp -- "youtube.com.*v="; then
+		debug_message "is_youtube_url − \
+The given argument seems to be a Youtube URL : ${local_youtube_url}."
+		return_is_youtube_url="0"
+	else
+		debug_message "is_youtube_url − \
+Verify that given URL really comes from Youtube with an ID (v=…) : ${local_youtube_url}."
+	fi
+
+	return "${return_is_youtube_url}"
+}
+# }}}
+extract_video_id() {                                            # {{{
+
+	local_youtube_url="${1}"
+	## By default ID is not valid
+	return_extract_video_id="1"
+
+	local_youtube_video_id=$(printf -- '%s' "${local_youtube_url}" | sed -e 's;.*youtube.com.*v=\(.*\);\1;' -e 's;&.*;;')
+	#local_youtube_video_id=""
+
+	## If an ID was found
+	if [ -n "${local_youtube_video_id}" ]; then
+		debug_message "extract_video_id − \
+successfully extract Youtube video ID : ${local_youtube_video_id}."
+		YOUTUBE_VIDEO_ID="${local_youtube_video_id}"
+		return_extract_video_id="0"
+	else
+		debug_message "extract_video_id − \
+Error while extracting video ID (${local_youtube_video_id}), please check the URL."
+	fi
+
+	return "${return_extract_video_id}"
+}
+# }}}
+open_in_browser() {                                             # {{{
+
+	local_url="${1}"
+
+	debug_message "open_in_browser − \
+Try to open ${RED}${local_url}${COLOR_DEBUG} in ${BROWSER}."
+
+	sh -c "${BROWSER} ${local_url}"
+}
+# }}}
+main() {                                                        # {{{
+
+	## Define all vars
+	define_vars
+
+	## Verify given argument
+	is_youtube_url "${YOUTUBE_URL}" \
+		|| exit 2
+
+	## Try to extract the video ID
+	extract_video_id "${YOUTUBE_URL}" \
+		|| exit 3
+
+	## Try to open embed version in browser
+	open_in_browser "${YOUTUBE_EMBED_URL_BASE}${YOUTUBE_VIDEO_ID}"
+
+}
+# }}}
+
+# Manage arguments                                                # {{{
+
+## If there is argument(s)
+if [ ! "${NBARGS}" -eq "0" ]; then
+
+	## If the first argument is not an option
+	if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
+	then
+		## Use this argument for Youtube URL
+		YOUTUBE_URL="${1}"
+
+		## Switch to the next argument
+		shift
+		manage_arg=$((manage_arg+1))
+	fi
+
+	manage_arg="0"
+
+	# Parse all options (start with a "-") one by one
+	while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
+
+	case "${1}" in
+		-d|--debug )           ## Enable debug mode
+			## Enable DEBUG
+			DEBUG="0"
+			;;
+		-h|--help )            ## help
+			usage
+			## Exit after help informations
+			exit 0
+			;;
+		-u|--url )             ## URL
+			## Move to the next argument
+			shift
+			## Set value to YOUTUBE_URL
+			YOUTUBE_URL="${1}"
+			;;
+		* )                    ## unknow option
+			printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
+			printf '%b\n' "---"
+			usage
+			exit 1
+			;;
+	esac
+
+	debug_message "Arguments management − \
+${RED}${1}${COLOR_DEBUG} option managed."
+
+	## Move to the next argument
+	shift
+	manage_arg=$((manage_arg+1))
+
+	done
+
+	debug_message "Arguments management − \
+${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
+else
+	usage
+	error_message "Expect at least one argument (the Youtube URL)."
+fi
+
+# }}}
+
+main
+
+exit 255