upload_to_talk.sh

#!/bin/bash

# ==============================================================================
# REQUIRED INPUT VARIABLES (set these)
# ==============================================================================

# The file path on your local Home Automation system (e.g., from the camera)
IMAGE_PATH="$1"

# The name or token of your Nextcloud Talk conversation
# For a group chat: This is usually the name of the chat room.
# For a 1:1 chat: This is the username of the other party.
YOUR_TALK_CHAT_ID="$2" 

# The optional follow-up message. Leave empty ("") to use the default fallback message.
FOLLOW_UP_MESSAGE="$3" 
# If empty, the message will be set to: "New file has been shared: [filename]"

# ==============================================================================
# NEXTCLOUD AUTH & PATH CONFIGURATION (set these)
# ==============================================================================
NEXTCLOUD="https://nextcloud"
USER="User"
PASSWORD="Password"

# The destination FOLDER inside your Nextcloud Files (e.g., 'Snapshots')
REMOTE_FOLDER="/sharing"

# ==============================================================================
# LOGGING CONFIGURATION
# ==============================================================================
# Define the path to your log file
LOG_FILE="/var/log/nextcloud_talk_notification.log"

# Define the logging function to replace echo
log() {
    # Prepend the current timestamp and append the message to the log file
    echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"
}
# Note: 'tee -a' prints to the screen (stdout) AND appends to the log file.
# If you want to ONLY log to the file (silent execution), use:
# echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "$LOG_FILE"

# ==============================================================================
# SCRIPT LOGIC (Automated Path Generation)
# ==============================================================================

# 1. Extract the filename from the local path (e.g., "lastDetection.png")
FILENAME=$(basename "$IMAGE_PATH")

# 2. Construct the full remote path
# Example: /Unifi-EVA/lastDetection.png
REMOTE_PATH="$REMOTE_FOLDER/$FILENAME"

# 3. SET FALLBACK MESSAGE
# Check if the user-defined message is empty. If so, set the generic message.
if [[ -z "$FOLLOW_UP_MESSAGE" ]]; then
    FOLLOW_UP_MESSAGE="New file has been shared: $FILENAME"
fi

log "--- Nextcloud Talk Image Notification ---"
log "Image Source: $IMAGE_PATH"
log "Image Filename: $FILENAME"
log "Nextcloud Destination: $REMOTE_PATH"
log "Talk Target: $YOUR_TALK_CHAT_ID"

# ==============================================================================
# SCRIPT EXECUTION
# ==============================================================================

# 1. DELETE the old remote file (WebDAV)
log "1. Attempting to delete old remote file at $REMOTE_PATH..."
delete_response=$(curl -s -X DELETE -u "$USER:$PASSWORD" \
      "$NEXTCLOUD/remote.php/dav/files/$USER$REMOTE_PATH" -w "%{http_code}")


if [[ "$delete_response" -eq 204 || "$delete_response" -eq 404 ]]; then
    log "    -> Delete successful or file not found (HTTP $delete_response). Proceeding with upload."
elif [[ "$delete_response" -eq 404 ]]; then
    # This is the check for "Does the file exist?"
    log "    -> Old file does not exist (HTTP 404). Proceeding with upload."
else
    log "    -> WARNING: Delete returned unexpected HTTP $delete_response."
fi

# 2. UPLOAD the Image (WebDAV)
log "2. Uploading image to $REMOTE_PATH..."
upload_response=$(curl -s -X PUT -u "$USER:$PASSWORD" \
     "$NEXTCLOUD/remote.php/dav/files/$USER$REMOTE_PATH" \
     -T "$IMAGE_PATH" -w "%{http_code}")

if [[ "$upload_response" -ge 200 && "$upload_response" -le 204 ]]; then
    log "   -> Upload successful (HTTP $upload_response)"
else
    log "   -> ERROR: Upload failed with HTTP $upload_response. Aborting."
    exit 1
fi

# 3. WAIT for Preview Generation (CRITICAL STEP for thumbnail)
log "3. Waiting 3 seconds for Nextcloud thumbnail generation..."
sleep 3

# 4. SHARE the file to the Talk Chat (Files Sharing API)
log "4. Sharing image to chat via Files Sharing API..."
share_response=$(curl -s -X POST -u "$USER:$PASSWORD" \
     -H "Content-Type: application/json" \
     -H "Accept: application/json" \
     -H "OCS-APIRequest: true" \
     -d "{\"shareWith\":\"$YOUR_TALK_CHAT_ID\",\"shareType\":10,\"path\":\"$REMOTE_PATH\"}" \
     "$NEXTCLOUD/ocs/v2.php/apps/files_sharing/api/v1/shares" -w "%{http_code}"\
     -o /dev/null)

if [[ "$share_response" -ne 200 ]]; then
    log "   -> ERROR: Share failed with HTTP $share_response. Image may not be visible."
fi

# 5. SEND FOLLOW-UP MESSAGE
# This message (either user-defined or the fallback) is necessary to force a client refresh.
log "5. Sending follow-up message: \"$FOLLOW_UP_MESSAGE\""
curl -s -X POST -u "$USER:$PASSWORD" \
     -H "Content-Type: application/json" \
     -H "OCS-APIRequest: true" \
     -d "{\"message\":\"$FOLLOW_UP_MESSAGE\"}" \
     "$NEXTCLOUD/ocs/v2.php/apps/spreed/api/v1/chat/$YOUR_TALK_CHAT_ID" \
     -o /dev/null

log "--- Script Finished ---"