Avoid keeping invalid files

birdnet-pi/rootfs/etc/cont-finish.d/savestreamdata.sh

@@ -1,6 +1,16 @@
 #!/usr/bin/with-contenv bashio
 # shellcheck shell=bash
 
+# Maximum file size in bytes (50MB)
+MAX_SIZE=$((50 * 1024 * 1024))
+
+# Function to check if a file is a valid WAV
+is_valid_wav() {
+    local file="$1"
+    # Check if the file contains a valid WAV header
+    file "$file" | grep -qE 'WAVE audio'
+}
+
 if [ -d "$HOME"/BirdSongs/StreamData ]; then
     bashio::log.fatal "Container stopping, saving temporary files."
 
@@ -18,16 +28,22 @@ if [ -d "$HOME"/BirdSongs/StreamData ]; then
     # Wait for both services to stop
     wait
 
-    # Check if there are files in StreamData and move them to /data/StreamData
+    # Create the destination directory
     mkdir -p /data/StreamData
-    if [ "$(ls -A "$HOME"/BirdSongs/StreamData)" ]; then
-        if mv -v "$HOME"/BirdSongs/StreamData/* /data/StreamData/; then
-            bashio::log.info "Files successfully moved to /data/StreamData."
+
+    # Move only valid WAV files under 50MB
+    shopt -s nullglob  # Prevent errors if no files match
+    for file in "$HOME"/BirdSongs/StreamData/*.wav; do
+        if [ -f "$file" ] && [ "$(stat --format="%s" "$file")" -lt "$MAX_SIZE" ] && is_valid_wav "$file"; then
+            if mv -v "$file" /data/StreamData/; then
+                bashio::log.info "Moved valid WAV file: $(basename "$file")"
+            else
+                bashio::log.error "Failed to move: $(basename "$file")"
+            fi
         else
-            bashio::log.error "Failed to move files to /data/StreamData."
-            exit 1
+            bashio::log.warning "Skipping invalid or large file: $(basename "$file")"
         fi
-    fi
+    done
 
     bashio::log.info "... files safe, allowing container to stop."
 else