ygg-api-download-updater

updater.sh

#!/bin/bash
set -euo pipefail

# =============================================================================
# SYNOPSIS
# Updates a custom Prowlarr definition from a remote source, creates backups,
# restarts the container if needed, and sends Gotify notifications.
# =============================================================================

# LANGUAGE: Message language (en or fr)
LANGUAGE="en"

# LOCAL_FILE: Path to the local Prowlarr custom definition file
LOCAL_FILE="/mnt/user/appdata/prowlarr/Definitions/Custom/ygg-api-download.yml"

# BACKUP_DIR: Directory where timestamped backups are stored
BACKUP_DIR="/mnt/user/appdata/prowlarr/Definitions/Custom/backups"

# TEMP_FILE: Temporary file used for the downloaded remote definition
TEMP_FILE="/tmp/ygg-api-download.yml.tmp"

# REMOTE_URL: Remote URL of the definition file to download
REMOTE_URL="https://gist.githubusercontent.com/Clemv95/8bfded23ef23ec78f6678896f42a2b60/raw/ygg-api-download.yml"

# DOCKER_CONTAINER: Name of the Prowlarr Docker container to restart
DOCKER_CONTAINER="Prowlarr"

# GOTIFY_URL: Base Gotify message endpoint URL
GOTIFY_URL="https://your.gotify.server/message"

# GOTIFY_TOKEN: Gotify application token for authentication
GOTIFY_TOKEN="YOUR_APP_TOKEN"

# ======================
# Translation helper
# ======================
t() {
    case "$LANGUAGE:$1" in
        fr:LOCAL_MISSING)  echo "Fichier local introuvable — mise à jour annulée." ;;
        fr:DOWNLOAD_FAIL)  echo "Échec du téléchargement du fichier distant." ;;
        fr:NO_UPDATE)      echo "Aucune mise à jour nécessaire — fichiers identiques." ;;
        fr:BACKUP_CREATED) echo "Sauvegarde créée :" ;;
        fr:UPDATE_DONE)    echo "Mise à jour appliquée." ;;
        fr:RESTARTING)     echo "Redémarrage de Prowlarr..." ;;
        fr:RESTART_OK)     echo "Prowlarr redémarré avec succès." ;;
        fr:RESTART_FAIL)   echo "Échec du redémarrage du conteneur Prowlarr." ;;
        fr:CONTAINER_MISS) echo "Conteneur Prowlarr introuvable." ;;
        fr:DOWNLOAD_OK)    echo "Fichier distant téléchargé." ;;
        fr:BACKUP_CLEAN)   echo "Anciennes sauvegardes supprimées." ;;
        en:LOCAL_MISSING)  echo "Local file does not exist — update aborted." ;;
        en:DOWNLOAD_FAIL)  echo "Failed to download remote file." ;;
        en:NO_UPDATE)      echo "No update needed — files match." ;;
        en:BACKUP_CREATED) echo "Backup created:" ;;
        en:UPDATE_DONE)    echo "Update applied." ;;
        en:RESTARTING)     echo "Restarting Prowlarr..." ;;
        en:RESTART_OK)     echo "Prowlarr restarted successfully." ;;
        en:RESTART_FAIL)   echo "Failed to restart Prowlarr container." ;;
        en:CONTAINER_MISS) echo "Prowlarr container not found." ;;
        en:DOWNLOAD_OK)    echo "Remote file downloaded." ;;
        en:BACKUP_CLEAN)   echo "Old backups removed." ;;
        *) echo "$1" ;;
    esac
}

# Cleanup temporary file on exit
cleanup() { rm -f "$TEMP_FILE"; }
trap cleanup EXIT

# Log messages to stdout
log() { echo "[YGG-UPDATE] $1"; }

# Send Gotify notification
notify() {
    curl -s --fail -X POST "$GOTIFY_URL?token=$GOTIFY_TOKEN" \
        -F "title=$1" -F "message=$2" -F "priority=${3:-5}" >/dev/null || true
}

# Abort if local file does not exist
if [ ! -f "$LOCAL_FILE" ]; then
    msg=$(t LOCAL_MISSING)
    log "$msg"
    notify "YGG Update Error" "$msg" 8
    exit 1
fi

# Download remote definition
if ! curl -sSL --fail \
     --proto '=https' --tlsv1.2 \
     --connect-timeout 10 --max-time 30 \
     --retry 3 --retry-delay 5 \
     "$REMOTE_URL" -o "$TEMP_FILE"; then
    msg=$(t DOWNLOAD_FAIL)
    log "$msg"
    notify "YGG Update Error" "$msg" 9
    exit 1
fi

log "$(t DOWNLOAD_OK)"

# Exit if files are identical
if cmp -s "$TEMP_FILE" "$LOCAL_FILE"; then
    log "$(t NO_UPDATE)"
    exit 0
fi

# Create backup directory if needed
mkdir -p "$BACKUP_DIR"

# timestamp: Current date/time for backup naming
timestamp=$(date +"%Y-%m-%d_%H-%M-%S")

# backup_file: Full path of the backup file
backup_file="$BACKUP_DIR/ygg-api-download.yml.$timestamp.bak"

cp "$LOCAL_FILE" "$backup_file"
log "$(t BACKUP_CREATED) $backup_file"

# Remove old backups, keeping only the 3 newest
mapfile -t old_backups < <(ls -1t "$BACKUP_DIR"/*.bak 2>/dev/null | tail -n +4)
for f in "${old_backups[@]}"; do rm -f "$f"; done
[ "${#old_backups[@]}" -gt 0 ] && log "$(t BACKUP_CLEAN)"

# Replace local file with updated version
mv "$TEMP_FILE" "$LOCAL_FILE"
log "$(t UPDATE_DONE)"
notify "YGG API Updated" "$(t UPDATE_DONE)" 5

# Restart Prowlarr container
if docker ps --format '{{.Names}}' | grep -qx "$DOCKER_CONTAINER"; then
    log "$(t RESTARTING)"
    if docker restart "$DOCKER_CONTAINER" >/dev/null 2>&1; then
        log "$(t RESTART_OK)"
        notify "Prowlarr" "$(t RESTART_OK)" 4
    else
        msg=$(t RESTART_FAIL)
        log "$msg"
        notify "Prowlarr Error" "$msg" 10
        exit 1
    fi
else
    msg=$(t CONTAINER_MISS)
    log "$msg"
    notify "Prowlarr Error" "$msg" 10
    exit 1
fi

exit 0