Integrate the xml processing with the rest of the project

processor/processor.go

@@ -457,8 +457,10 @@ STRING FUNCTIONS:
   format(s, ...)          - Formats string using Lua string.format
   trim(s)                 - Removes leading/trailing whitespace
   strsplit(inputstr, sep) - Splits string by separator (default: whitespace)
-  fromCSV(csv, delimiter, hasHeaders) - Parses CSV text into rows of fields (delimiter defaults to ",", hasHeaders defaults to false)
-  toCSV(rows, delimiter)  - Converts table of rows to CSV text format (delimiter defaults to ",")
+  fromCSV(csv, options)   - Parses CSV text into rows of fields
+    options: {delimiter=",", hasheader=false, hascomments=false}
+  toCSV(rows, options)    - Converts table of rows to CSV text format
+    options: {delimiter=",", hasheader=false}
   num(str)                - Converts string to number (returns 0 if invalid)
   str(num)                - Converts number to string
   is_number(str)          - Returns true if string is numeric
@@ -467,6 +469,31 @@ TABLE FUNCTIONS:
   dump(table, depth) - Prints table structure recursively
   isArray(t)         - Returns true if table is a sequential array
 
+XML HELPER FUNCTIONS:
+  findElements(root, tagName)           - Find all elements with specific tag name
+  visitElements(root, callback)         - Visit all elements recursively
+    callback(element, depth, path)
+  filterElements(root, predicate)       - Find elements matching condition
+    predicate(element) returns true/false
+  getNumAttr(element, attrName)         - Get numeric attribute value
+  setNumAttr(element, attrName, value)  - Set numeric attribute value
+  modifyNumAttr(element, attrName, func)- Modify numeric attribute with function
+    func(currentValue) returns newValue
+  hasAttr(element, attrName)            - Check if attribute exists
+  getAttr(element, attrName)            - Get attribute value as string
+  setAttr(element, attrName, value)     - Set attribute value
+  getText(element)                      - Get element text content
+  setText(element, text)                - Set element text content
+
+JSON HELPER FUNCTIONS:
+  visitJSON(data, callback)             - Visit all values in JSON structure
+    callback(value, key, parent)
+  findInJSON(data, predicate)           - Find values matching condition
+    predicate(value, key, parent) returns true/false
+  modifyJSONNumbers(data, predicate, modifier) - Modify numeric values
+    predicate(value, key, parent) returns true/false
+    modifier(currentValue) returns newValue
+
 HTTP FUNCTIONS:
   fetch(url, options) - Makes HTTP request, returns response table
     options: {method="GET", headers={}, body=""}
@@ -480,12 +507,31 @@ UTILITY FUNCTIONS:
   print(...)          - Prints arguments to Go logger
 
 EXAMPLES:
+  -- Math
   round(3.14159, 2)      -> 3.14
+  min(5, 3)              -> 3
+  
+  -- String
   strsplit("a,b,c", ",") -> {"a", "b", "c"}
   upper("hello")         -> "HELLO"
-  min(5, 3)              -> 3
   num("123")             -> 123
-  is_number("abc")       -> false
-  fetch("https://api.example.com/data")
-  re("(\\w+)@(\\w+)", "user@domain.com") -> {"user@domain.com", "user", "domain.com"}`
+  
+  -- XML (where root is XML element with _tag, _attr, _children fields)
+  local items = findElements(root, "Item")
+  for _, item in ipairs(items) do
+    modifyNumAttr(item, "Weight", function(w) return w * 2 end)
+  end
+  
+  -- JSON (where data is parsed JSON object)
+  visitJSON(data, function(value, key, parent)
+    if type(value) == "number" and key == "price" then
+      parent[key] = value * 1.5
+    end
+  end)
+  
+  -- HTTP
+  local response = fetch("https://api.example.com/data")
+  if response.ok then
+    print(response.body)
+  end`
 }