htwkalender/services/data-manager/service/functions/roomMapping.go

package functions

import (
	"regexp"
	"strings"
)

func MapRoom(room string) string {
	// remove dots from room string
	room = strings.ReplaceAll(room, ".", "")

	// Regular expression pattern to match room identifiers
	// The pattern looks for strings that start with two uppercase letters, optionally followed by an underscore,
	// followed by 1 to 3 digits, and ending with "-[A-Z]"
	re := regexp.MustCompile(`\b[A-ZÄÖÜ]{2}([_]+[A-ZÄÖÜ])?[0-9]{1,4}[a-zäöü]?-[A-ZÄÖÜ]\b`)

	// Use the ReplaceAllStringFunc to process each match
	result := re.ReplaceAllStringFunc(room, func(match string) string {
		// Remove the last two characters (i.e., "-<letter>")
		return match[:len(match)-2]
	})

	return result
}