refactor weather parser

internal/adapter/parser/weather/common_elements.go

@@ -0,0 +1,96 @@
+package weather
+
+import (
+	"caatsm/internal/domain/weather"
+	"fmt"
+	"strconv"
+)
+
+func parseWindAndVisibility(tokens []string) (int, *weather.Wind, *weather.Visibility) {
+	pos := 0
+	var wind *weather.Wind
+	var visibility *weather.Visibility
+
+	if pos < len(tokens) {
+		if parsed := parseWind(tokens[pos]); parsed != nil {
+			wind = parsed
+			pos++
+
+			if pos < len(tokens) {
+				if match := variableWindPattern.FindStringSubmatch(tokens[pos]); match != nil {
+					from, _ := strconv.Atoi(match[1])
+					to, _ := strconv.Atoi(match[2])
+					wind.Variable = true
+					wind.VariableFrom = from
+					wind.VariableTo = to
+					pos++
+				}
+			}
+		}
+	}
+
+	if pos < len(tokens) {
+		if parsed := parseVisibility(tokens[pos]); parsed != nil {
+			visibility = parsed
+			pos++
+		}
+	}
+
+	return pos, wind, visibility
+}
+
+func parsePhenomena(tokens []string) (int, []weather.Phenomenon) {
+	pos := 0
+	var phenomena []weather.Phenomenon
+
+	for pos < len(tokens) {
+		if match := phenomenonPattern.FindStringSubmatch(tokens[pos]); match != nil {
+			phenomena = append(phenomena, weather.Phenomenon{
+				Intensity:  match[1],
+				Descriptor: match[2],
+				Weather:    match[3],
+			})
+			pos++
+			continue
+		}
+		break
+	}
+
+	return pos, phenomena
+}
+
+func parseClouds(tokens []string) (int, []weather.Cloud) {
+	pos := 0
+	var clouds []weather.Cloud
+
+	if pos < len(tokens) {
+		if skyClearPattern.MatchString(tokens[pos]) {
+			return 1, clouds
+		}
+	}
+
+	for pos < len(tokens) {
+		if match := cloudPattern.FindStringSubmatch(tokens[pos]); match != nil {
+			alt, _ := strconv.Atoi(match[2])
+			clouds = append(clouds, weather.Cloud{
+				Type:     match[1],
+				Altitude: alt * 100,
+				Modifier: match[3],
+			})
+			pos++
+			continue
+		}
+		break
+	}
+
+	return pos, clouds
+}
+
+func appendPeriodWarnings(warnings *[]string, tokens []string) {
+	if warnings == nil {
+		return
+	}
+	for _, token := range tokens {
+		*warnings = append(*warnings, fmt.Sprintf("unrecognized token in period: %s", token))
+	}
+}