If Snap Candidate MongoDB raw database files were at SNAP_COMMON/wekan, migrate them back to SNAP_COMMON.

Thanks to xet7 !

snap-src/bin/mongodb-control

@@ -51,6 +51,59 @@ if [ ! -d "$MONGO_DATA_DIR" ]; then
     chmod 755 "$MONGO_DATA_DIR"
 fi
 
+# Handle migration from SNAP_COMMON/wekan back to SNAP_COMMON
+# This ensures data is preserved when switching from per-swimlane lists back to shared lists
+if [ ! -d "${SNAP_COMMON}/mongodb-migration-completed" ]; then
+    echo "Checking for MongoDB data migration from SNAP_COMMON/wekan to SNAP_COMMON..."
+    
+    # Check if SNAP_COMMON/wekan exists and has MongoDB data
+    if [ -d "${SNAP_COMMON}/wekan" ] && [ "$(ls -A ${SNAP_COMMON}/wekan 2>/dev/null)" ]; then
+        echo "Found MongoDB data in SNAP_COMMON/wekan, migrating to SNAP_COMMON..."
+        
+        # Create backup directory for existing SNAP_COMMON data
+        if [ "$(ls -A ${SNAP_COMMON} 2>/dev/null)" ]; then
+            echo "Backing up existing SNAP_COMMON data to SNAP_COMMON/old-mongodb-move..."
+            mkdir -p "${SNAP_COMMON}/old-mongodb-move"
+            # Move all files except Caddyfile
+            for file in "${SNAP_COMMON}"/*; do
+                if [ -f "$file" ] && [ "$(basename "$file")" != "Caddyfile" ]; then
+                    mv "$file" "${SNAP_COMMON}/old-mongodb-move/"
+                fi
+            done
+            # Move specific MongoDB directories
+            if [ -d "${SNAP_COMMON}/journal" ]; then
+                echo "Moving SNAP_COMMON/journal to old-mongodb-move..."
+                mv "${SNAP_COMMON}/journal" "${SNAP_COMMON}/old-mongodb-move/"
+            fi
+            if [ -d "${SNAP_COMMON}/diagnostic.data" ]; then
+                echo "Moving SNAP_COMMON/diagnostic.data to old-mongodb-move..."
+                mv "${SNAP_COMMON}/diagnostic.data" "${SNAP_COMMON}/old-mongodb-move/"
+            fi
+        fi
+        
+        # Move MongoDB data files from SNAP_COMMON/wekan to SNAP_COMMON
+        echo "Moving MongoDB data from SNAP_COMMON/wekan to SNAP_COMMON..."
+        mv "${SNAP_COMMON}/wekan"/* "${SNAP_COMMON}/" 2>/dev/null || true
+        
+        # Rename SNAP_COMMON/wekan to SNAP_COMMON/old-wekan
+        echo "Renaming SNAP_COMMON/wekan to SNAP_COMMON/old-wekan..."
+        mv "${SNAP_COMMON}/wekan" "${SNAP_COMMON}/old-wekan"
+        
+        # Set proper permissions
+        chmod 755 "${SNAP_COMMON}"
+        chmod 755 "${SNAP_COMMON}/old-wekan" 2>/dev/null || true
+        chmod 755 "${SNAP_COMMON}/old-mongodb-move" 2>/dev/null || true
+        
+        echo "MongoDB data migration completed successfully"
+    else
+        echo "No MongoDB data found in SNAP_COMMON/wekan, skipping migration"
+    fi
+    
+    # Mark migration as completed
+    touch "${SNAP_COMMON}/mongodb-migration-completed"
+    echo "MongoDB migration marker created"
+fi
+
 # Set MongoDB log file path
 export MONGO_LOG_FILE="${SNAP_COMMON}/mongodb.log"