package nginx

// LineType enumerates available line types
type LineType byte

const (
	// NONE is the default line type (invalid syntax)
	NONE LineType = iota
	// COMMENT represents a #-comment
	COMMENT
	// COLONCOMMENT represents a ;-comment
	COLONCOMMENT
	// ASSIGNMENT line
	ASSIGNMENT
	// INCLUDE  line
	INCLUDE
	// SECTION start
	SECTION
	// SECTIONEND line '}'
	SECTIONEND
)

// Line represents a meaningful line
type Line struct {
	// Type of line
	Type LineType

	// Components of the line
	Components []string

	// Lines children of the current section (nil if not a section)
	Lines []*Line
}

// Section returns the section with a given name *directly*
// inside the current line ; nil is returned if no match found
func (l *Line) Section(name string) *Line {
	for _, elem := range l.Lines {
		if elem.Type == SECTION && elem.Components[0] == name {
			return elem
		}
	}
	return nil
}

// Get returns a pointer to the assignment line the given name as key
// *directly* inside the current line ; nil is returned if no match found
func (l *Line) Get(name string) *Line {
	for _, elem := range l.Lines {
		if elem.Type == ASSIGNMENT && elem.Components[0] == name {
			return elem
		}
	}
	return nil
}