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pseudo-channel/multi-channel-bash-scripts/manual.sh

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#!/bin/bash
# Credits: irodimus
# file: manual.sh
#----
# Simple script to change to specific channel given - triggering start / stop.
#----
#----
# To Use:
# Run script by including the channel you'd like to run as an argument: ex. ./manual.sh 2, ./manual.sh 9
#
# Configure something (a tv remote or alexa) to trigger this script. Make sure you move this script just
# outside of the pseudo-channel directories:
# -------------------
# -channels/
# --pseudo-channel_1/
# ---startstop.sh
# --pseudo-channel_2/
# ---startstop.sh
# --pseudo-channel_3/
# ---startstop.sh
# --manual.sh <--- on the same level as the 3 channels.
#----
# Make sure that each channel dir ends with a "_" + an incrementing number as seen above.
#----BEGIN EDITABLE VARS----
SCRIPT_TO_EXECUTE='startstop.sh'
OUTPUT_PREV_CHANNEL_PATH=.
OUTPUT_PREV_CHANNEL_FILE=".prevplaying"
CHANNEL_DIR_INCREMENT_SYMBOL="_"
#----END EDITABLE VARS-------
FIRST_RUN=false
# Scan the dir to see how many channels there are, store them in an arr.
CHANNEL_DIR_ARR=( $(find . -maxdepth 1 -type d -name '*'"$CHANNEL_DIR_INCREMENT_SYMBOL"'[[:digit:]]*' -printf "%P\n" | sort -t"$CHANNEL_DIR_INCREMENT_SYMBOL" -n) )
# If the previous channel txt file doesn't exist already create it (first run?)
if [ ! -e "$OUTPUT_PREV_CHANNEL_PATH/$OUTPUT_PREV_CHANNEL_FILE" ]; then
#FIRST_RUN_NUM=$((${#CHANNEL_DIR_ARR[@]}))
echo 1 > "$OUTPUT_PREV_CHANNEL_PATH/$OUTPUT_PREV_CHANNEL_FILE"
echo "First run: $FIRST_RUN_NUM"
FIRST_RUN=true
fi
# If this script see's there are multiple channels,
# then read file, get prevchannel and nextchannel, and trigger next channel:
if [ "${#CHANNEL_DIR_ARR[@]}" -gt 1 ]; then
NEXT_CHANNEL=$1
NEXT_CHANNEL_DIR=( $(find . -maxdepth 1 -type d -name '*'"$CHANNEL_DIR_INCREMENT_SYMBOL""$NEXT_CHANNEL" -printf "%P\n") )
PREV_CHANNEL_FOUND=false
echo "+++++ There are ${#CHANNEL_DIR_ARR[@]} channels detected."
PREV_CHANNEL=$(<$OUTPUT_PREV_CHANNEL_PATH/$OUTPUT_PREV_CHANNEL_FILE)
PREV_CHANNEL_DIR=( $(find . -maxdepth 1 -type d -name '*'"$CHANNEL_DIR_INCREMENT_SYMBOL""$PREV_CHANNEL" -printf "%P\n") )
echo "+++++ It looks like the previous channel was: $PREV_CHANNEL"
echo "+++++ The next channel is: $NEXT_CHANNEL"
# Write next channel to previous channel file to reference later
echo "$NEXT_CHANNEL" > "$OUTPUT_PREV_CHANNEL_PATH/$OUTPUT_PREV_CHANNEL_FILE"
# Finally let's trigger the startstop script in both the previous channel and the next channel dirs.
# This will stop the previous channels playback & trigger the next channels playback
if [ "$FIRST_RUN" = false ]; then
cd "$OUTPUT_PREV_CHANNEL_PATH"/"$PREV_CHANNEL_DIR" && ./"$SCRIPT_TO_EXECUTE"
cd ../"$NEXT_CHANNEL_DIR" && ./"$SCRIPT_TO_EXECUTE"
else
cd "$OUTPUT_PREV_CHANNEL_PATH"/"$NEXT_CHANNEL_DIR" && ./"$SCRIPT_TO_EXECUTE"
fi
sleep 1
fi
exit 0