Send Minecraft chat to Discord via webhook. For vanilla Minecraft server.

chat-to-discord.sh

DISCORD_WEBHOOK_URL="WEBHOOK URL HERE"

# send a message to Discord via webhook
call_webhook() {
    curl -X POST \
        -H "Content-Type: application/json" \
        -d "{\"content\": \"$1\"}" \
        "$DISCORD_WEBHOOK_URL"
}

process_new_line() {
    local line="$1"
    local chat_regex="^\[[0-9]{2}:[0-9]{2}:[0-9]{2}\] \[Server thread/INFO\]: <([^>]+)> (.+)$"
    local joined_regex="^\[[0-9]{2}:[0-9]{2}:[0-9]{2}\] \[Server thread/INFO\]: (.+) joined the game$"
    local left_regex="^\[[0-9]{2}:[0-9]{2}:[0-9]{2}\] \[Server thread/INFO\]: (.+) left the game$"

    if [[ "$line" =~ $chat_regex ]]; then
        local username="${BASH_REMATCH[1]}"
        local message="${BASH_REMATCH[2]}"

        echo "Message from $username: $message"
        call_webhook "**$username** : $message"
    elif [[ "$line" =~ $joined_regex ]]; then
        local username="${BASH_REMATCH[1]}"

        echo "$usename joined the game"
        call_webhook "$username が参加しました"
    elif [[ "$line" =~ $left_regex ]]; then
        local username="${BASH_REMATCH[1]}"

        echo "$usename left the game"
        call_webhook "$username が退出しました"
    else
        echo "Ignoring: $line"
    fi
}

tail -f ./logs/latest.log | while read -r new_line; do
    process_new_line "$new_line"
done