Buggy_Event_4.sh

#!/bin/sh
source env.sh

sleep $EFFECT_WAIT

echo "EVENT: Flip flop!"
$MCRCON_HOME/mcrcon -H $SERVER_IP -p $PASSWD "title @a title {\"text\":\"Flip flop!\", \"color\":\"red\"}" "title @a subtitle {\"text\":\"Zwei Teams wechseln ihre Positionen...\"}"

sleep $EFFECT_WAIT

#
# Teams zufsallig auswaehlen
#

# First, filtering live teams
declare -a liveTeams
teams=(blue gold green aqua red yellow light_purple dark_blue)
for team in "${teams[@]}"
do
    teamPlayers=$( $MCRCON_HOME/mcrcon -H $SERVER_IP -p $PASSWD "scoreboard teams list $team" )
    if [[ $teamPlayers =~ Showing ]]; then
        liveTeams+=( "$team" )
    fi
done

# Proceed only if 2 or more teams have players
if [ ${#liveTeams[@]} <= 2 ]; then
    echo "Less than 2 teams available, aborting."
    exit 255
fi

# Prepare random seed generator, and target teams variables
RANDOM=$$$(date +%s) # Seed random generator
team_a=""
team_b=""

# randomly select _different_ teams
while [ $team_a = $team_b ]
do
    team_a=${liveTeams[$RANDOM % ${#liveTeams[@]} ]}
    team_b=${liveTeams[$RANDOM % ${#liveTeams[@]} ]}
done

# Summon invisible armour stand to team A
$MCRCON_HOME/mcrcon -H $SERVER_IP -p $PASSWD "execute @p[team=$team_a] ~ ~ ~ summon ArmorStand ~ ~ ~ {Invisible:1,Invulnerable:1,Marker:1,NoGravity:1,NoAI:1,tags=[\"swap\"]}"

# Teleport team A to team B (armour stand stays at team A's position)
$MCRCON_HOME/mcrcon -H $SERVER_IP -p $PASSWD "tp @p[team=$team_a] @p[team=$team_b]"

# Now teleport team B to armour stand (at team A's former position)
$MCRCON_HOME/mcrcon -H $SERVER_IP -p $PASSWD "tp @p[team=$team_b] @p[tag=swap]"

# Remove armour stand
$MCRCON_HOME/mcrcon -H $SERVER_IP -p $PASSWD "kill @e[tag=swap]"