refactor weather parser

internal/adapter/parser/weather/lexer.go

@@ -14,92 +14,3 @@ func Tokenize(raw string) []string {
 	tokens := strings.Fields(raw)
 	return tokens
 }
-
-// Section represents a special section in the report (RMK, TEMPO, BECMG, FM)
-type Section struct {
-	Type      string   // "RMK", "TEMPO", "BECMG", "FM"
-	StartIdx  int      // Starting token index
-	EndIdx    int      // Ending token index (exclusive)
-	Tokens    []string // Tokens in this section
-}
-
-// FindSpecialSections identifies special sections in the tokenized report
-func FindSpecialSections(tokens []string) []Section {
-	var sections []Section
-	var currentSection *Section
-
-	for i, token := range tokens {
-		upperToken := strings.ToUpper(token)
-
-		switch {
-		case strings.HasPrefix(upperToken, "RMK"):
-			if currentSection != nil {
-				currentSection.EndIdx = i
-				sections = append(sections, *currentSection)
-			}
-			currentSection = &Section{
-				Type:     "RMK",
-				StartIdx: i,
-				Tokens:   []string{token},
-			}
-
-		case strings.HasPrefix(upperToken, "TEMPO"):
-			if currentSection != nil && currentSection.Type != "RMK" {
-				currentSection.EndIdx = i
-				sections = append(sections, *currentSection)
-			}
-			currentSection = &Section{
-				Type:     "TEMPO",
-				StartIdx: i,
-				Tokens:   []string{token},
-			}
-
-		case strings.HasPrefix(upperToken, "BECMG"):
-			if currentSection != nil && currentSection.Type != "RMK" {
-				currentSection.EndIdx = i
-				sections = append(sections, *currentSection)
-			}
-			currentSection = &Section{
-				Type:     "BECMG",
-				StartIdx: i,
-				Tokens:   []string{token},
-			}
-
-		case strings.HasPrefix(upperToken, "FM"):
-			if currentSection != nil && currentSection.Type != "RMK" {
-				currentSection.EndIdx = i
-				sections = append(sections, *currentSection)
-			}
-			currentSection = &Section{
-				Type:     "FM",
-				StartIdx: i,
-				Tokens:   []string{token},
-			}
-
-		default:
-			if currentSection != nil {
-				currentSection.Tokens = append(currentSection.Tokens, token)
-			}
-		}
-	}
-
-	// Close the last section
-	if currentSection != nil {
-		currentSection.EndIdx = len(tokens)
-		sections = append(sections, *currentSection)
-	}
-
-	return sections
-}
-
-// ExtractSectionTokens extracts tokens for a specific section type
-func ExtractSectionTokens(tokens []string, sectionType string) []string {
-	sections := FindSpecialSections(tokens)
-	for _, section := range sections {
-		if section.Type == sectionType {
-			return section.Tokens
-		}
-	}
-	return nil
-}
-