Integrate the xml processing with the rest of the project

processor/xml.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	logger "git.site.quack-lab.dev/dave/cylogger"
+	lua "github.com/yuin/gopher-lua"
 )
 
 var xmlLogger = logger.Default.WithPrefix("processor/xml")
@@ -445,3 +446,149 @@ func formatNumeric(f float64) string {
 	}
 	return strconv.FormatFloat(f, 'f', -1, 64)
 }
+
+// ProcessXML applies Lua processing to XML content with surgical editing
+func ProcessXML(content string, command utils.ModifyCommand, filename string) ([]utils.ReplaceCommand, error) {
+	processXMLLogger := xmlLogger.WithPrefix("ProcessXML").WithField("commandName", command.Name).WithField("file", filename)
+	processXMLLogger.Debug("Starting XML processing for file")
+
+	// Parse XML with position tracking
+	originalElem, err := parseXMLWithPositions(content)
+	if err != nil {
+		processXMLLogger.Error("Failed to parse XML: %v", err)
+		return nil, fmt.Errorf("failed to parse XML: %v", err)
+	}
+	processXMLLogger.Debug("Successfully parsed XML content")
+
+	// Create Lua state
+	L, err := NewLuaState()
+	if err != nil {
+		processXMLLogger.Error("Error creating Lua state: %v", err)
+		return nil, fmt.Errorf("error creating Lua state: %v", err)
+	}
+	defer L.Close()
+
+	// Set filename global
+	L.SetGlobal("file", lua.LString(filename))
+
+	// Create modifiable copy
+	modifiedElem := deepCopyXMLElement(originalElem)
+
+	// Convert to Lua table and set as global
+	luaTable := xmlElementToLuaTable(L, modifiedElem)
+	L.SetGlobal("root", luaTable)
+	processXMLLogger.Debug("Set XML data as Lua global 'root'")
+
+	// Build and execute Lua script
+	luaExpr := BuildJSONLuaScript(command.Lua) // Reuse JSON script builder
+	processXMLLogger.Debug("Built Lua script from expression: %q", command.Lua)
+
+	if err := L.DoString(luaExpr); err != nil {
+		processXMLLogger.Error("Lua script execution failed: %v\nScript: %s", err, luaExpr)
+		return nil, fmt.Errorf("lua script execution failed: %v", err)
+	}
+	processXMLLogger.Debug("Lua script executed successfully")
+
+	// Check if modification flag is set
+	modifiedVal := L.GetGlobal("modified")
+	if modifiedVal.Type() != lua.LTBool || !lua.LVAsBool(modifiedVal) {
+		processXMLLogger.Debug("Skipping - no modifications indicated by Lua script")
+		return nil, nil
+	}
+
+	// Get the modified data back from Lua
+	modifiedTable := L.GetGlobal("root")
+	if modifiedTable.Type() != lua.LTTable {
+		processXMLLogger.Error("Expected 'root' to be a table after Lua processing")
+		return nil, fmt.Errorf("expected 'root' to be a table after Lua processing")
+	}
+
+	// Apply Lua modifications back to XMLElement
+	luaTableToXMLElement(L, modifiedTable.(*lua.LTable), modifiedElem)
+
+	// Find changes between original and modified
+	changes := findXMLChanges(originalElem, modifiedElem, "")
+	processXMLLogger.Debug("Found %d changes", len(changes))
+
+	if len(changes) == 0 {
+		return nil, nil
+	}
+
+	// Generate surgical replace commands
+	commands := applyXMLChanges(changes)
+	processXMLLogger.Debug("Generated %d replace commands", len(commands))
+
+	return commands, nil
+}
+
+// xmlElementToLuaTable converts an XMLElement to a Lua table
+func xmlElementToLuaTable(L *lua.LState, elem *XMLElement) *lua.LTable {
+	table := L.CreateTable(0, 4)
+	table.RawSetString("_tag", lua.LString(elem.Tag))
+
+	if len(elem.Attributes) > 0 {
+		attrs := L.CreateTable(0, len(elem.Attributes))
+		for name, attr := range elem.Attributes {
+			attrs.RawSetString(name, lua.LString(attr.Value))
+		}
+		table.RawSetString("_attr", attrs)
+	}
+
+	if elem.Text != "" {
+		table.RawSetString("_text", lua.LString(elem.Text))
+	}
+
+	if len(elem.Children) > 0 {
+		children := L.CreateTable(len(elem.Children), 0)
+		for i, child := range elem.Children {
+			children.RawSetInt(i+1, xmlElementToLuaTable(L, child))
+		}
+		table.RawSetString("_children", children)
+	}
+
+	return table
+}
+
+// luaTableToXMLElement applies Lua table modifications back to XMLElement
+func luaTableToXMLElement(L *lua.LState, table *lua.LTable, elem *XMLElement) {
+	// Update text
+	if textVal := table.RawGetString("_text"); textVal.Type() == lua.LTString {
+		elem.Text = string(textVal.(lua.LString))
+	}
+
+	// Update attributes
+	if attrVal := table.RawGetString("_attr"); attrVal.Type() == lua.LTTable {
+		attrTable := attrVal.(*lua.LTable)
+		// Clear and rebuild attributes
+		elem.Attributes = make(map[string]XMLAttribute)
+		attrTable.ForEach(func(key lua.LValue, value lua.LValue) {
+			if key.Type() == lua.LTString && value.Type() == lua.LTString {
+				attrName := string(key.(lua.LString))
+				attrValue := string(value.(lua.LString))
+				elem.Attributes[attrName] = XMLAttribute{Value: attrValue}
+			}
+		})
+	}
+
+	// Update children
+	if childrenVal := table.RawGetString("_children"); childrenVal.Type() == lua.LTTable {
+		childrenTable := childrenVal.(*lua.LTable)
+		newChildren := []*XMLElement{}
+		
+		// Iterate over array indices
+		for i := 1; ; i++ {
+			childVal := childrenTable.RawGetInt(i)
+			if childVal.Type() == lua.LTNil {
+				break
+			}
+			if childVal.Type() == lua.LTTable {
+				if i-1 < len(elem.Children) {
+					// Update existing child
+					luaTableToXMLElement(L, childVal.(*lua.LTable), elem.Children[i-1])
+					newChildren = append(newChildren, elem.Children[i-1])
+				}
+			}
+		}
+		elem.Children = newChildren
+	}
+}