Add support for RUSH_HOURS and SLEEP_HOURS to the PDF download loop.

1 files changed, 105 insertions, 2 deletions

diff --git a/bin/impressive-display b/bin/impressive-display
index 3cff9ac..3a786e4 100755
--- a/bin/impressive-display
+++ b/bin/impressive-display
@@ -72,12 +72,23 @@ HTTP_PROXY_URL=""
 # interval of PDF continuous downloads
 DOWNLOAD_INTERVAL="600"
 
+# During rush hours check PDF file on remote URL more often
+RUSH_HOURS="07-11"
+RUSH_HOURS_DOWNLOAD_INTERVAL="180"
+
+# Disable PDF downloads at night time completely...
+SLEEP_HOURS="22-06"
+SLEEP_HOURS_DOWNLOAD_INTERVAL="0"
+
 # show each slide for 20 seconds by default
 SLIDE_DURATION="20"
 
 # option for impressive fading...
 IMPRESSIVE_OPTIONS="--transition None"
 
+# write some debugging output to stdout when downloading a remote PDF
+DEBUG_DOWNLOADS=""
+
 if [ -r $HOME/.impressive-display-secrets ] && [ ! -d $HOME/.impressive-display-secrets ]; then
 	. $HOME/.impressive-display-secrets
 fi
@@ -159,6 +170,11 @@ if [ -n "$HTTP_PROXY_URL" ]; then
 	export ftp_proxy="$HTTP_PROXY_URL"
 fi
 
+rush_hours_start=`echo $RUSH_HOURS | grep -E '^[0-9]{2}-[0-9]{2}$' | sed  -n -r -e 's/^([0-9]{2})-([0-9]{2})$/\1/p'`
+rush_hours_end=`echo $RUSH_HOURS | grep -E '^[0-9]{2}-[0-9]{2}$' | sed  -n -r -e 's/^([0-9]{2})-([0-9]{2})$/\2/p'`
+sleep_hours_start=`echo $SLEEP_HOURS | grep -E '^[0-9]{2}-[0-9]{2}$' | sed  -n -r -e 's/^([0-9]{2})-([0-9]{2})$/\1/p'`
+sleep_hours_end=`echo $SLEEP_HOURS | grep -E '^[0-9]{2}-[0-9]{2}$' | sed  -n -r -e 's/^([0-9]{2})-([0-9]{2})$/\2/p'`
+
 function cleanup {
 
 	if [ -r "$impressive_lock" ]; then
@@ -243,6 +259,64 @@ function local_pdffile {
 
 }
 
+function is_rush_hour {
+
+	if [ -n "$rush_hours_start" ] && [ -n "$rush_hours_end" ]; then
+
+		current_hour=`date +%H`
+		if [ $rush_hours_end -gt $rush_hours_start ]; then
+
+			if [ $rush_hours_start -le $current_hour  ] && [ $current_hour -lt $rush_hours_end ]; then
+				echo "true"
+				return 0
+			fi
+
+		else
+
+			if [ $rush_hours_end -le $current_hour  ] && [ $current_hour -lt $rush_hours_start ]; then
+				:
+			else
+				echo "true"
+				return 0
+			fi
+
+		fi
+
+	fi
+	echo "false"
+	return -1
+
+}
+
+function is_sleep_hour {
+
+	if [ -n "$sleep_hours_start" ] && [ -n "$sleep_hours_end" ]; then
+
+		current_hour=`date +%H`
+		if [ $sleep_hours_end -gt $sleep_hours_start ]; then
+
+			if [ $sleep_hours_start -le $current_hour  ] && [ $current_hour -lt $sleep_hours_end ]; then
+				echo "true"
+				return 0
+			fi
+
+		else
+
+			if [ $sleep_hours_end -le $current_hour  ] && [ $current_hour -lt $sleep_hours_start ]; then
+				:
+			else
+				echo "true"
+				return 0
+			fi
+
+		fi
+
+	fi
+	echo "false"
+	return -1
+
+}
+
 function download_pdffile {
 
 	if [ -r "$pdffile_downloaded" ]; then
@@ -279,10 +353,39 @@ function download_loop {
 
 	if [ "x$DOWNLOAD_INTERVAL" != "x0" ]; then
 		(
+			#set -x
 			while [ -e "$session_lock" ]; do
-				sleep $DOWNLOAD_INTERVAL
-				download_pdffile
+
+				if [ -n "$DEBUG_DOWNLOADS" ]; then
+					echo "DEBUG: rush hour: `is_rush_hour` (interval: $RUSH_HOURS_DOWNLOAD_INTERVAL), sleep hour: `is_sleep_hour` (interval: $SLEEP_HOURS_DOWNLOAD_INTERVAL). Normal interval: $DOWNLOAD_INTERVAL."
+				fi
+
+				if is_rush_hour 1>/dev/null && [ "x$RUSH_HOURS_DOWNLOAD_INTERVAL" != "x0" ]; then
+					sleep $RUSH_HOURS_DOWNLOAD_INTERVAL
+					if [ -n "$DEBUG_DOWNLOADS" ]; then
+						echo "RUSH HOUR download, URL: $PDF_URL"
+					fi
+					download_pdffile
+				elif is_sleep_hour 1>/dev/null  && [ "x$SLEEP_HOURS_DOWNLOAD_INTERVAL" != "x0" ]; then
+					sleep $SLEEP_HOURS_DOWNLOAD_INTERVAL
+					if [ -n "$DEBUG_DOWNLOADS" ]; then
+						echo "SLEEP HOUR download, URL: $PDF_URL"
+					fi
+					download_pdffile
+				elif (! is_rush_hour 1>/dev/null ) && (! is_sleep_hour 1>/dev/null) && [ "x$DOWNLOAD_INTERVAL" != "x0" ]; then
+					sleep $DOWNLOAD_INTERVAL
+					if [ -n "$DEBUG_DOWNLOADS" ]; then
+						echo "NORMAL HOUR download, URL: $PDF_URL"
+					fi
+					download_pdffile
+				else
+					if [ -n "$DEBUG_DOWNLOADS" ]; then
+						echo "DEBUG: Not doing any download."
+					fi
+					sleep 60
+				fi
 			done
+			#set +x
 		) &
 	fi