Day4 WIP

day4/day4.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"../helper"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	args := os.Args[1:]
+	input, err := helper.GetFile(args[0])
+	if err != nil {
+		fmt.Println(err)
+	}
+	reqFields := []string{"byr:", "iyr:", "eyr:", "hgt:", "hcl:", "ecl:", "pid:"}
+	documents := strings.Split(input, "\n\n")
+	count := 0
+	countPart2 := 0
+	for _, document := range documents {
+		if isValid(document, reqFields) {
+			count++
+			if isValidPart2(document) {
+				countPart2++
+			}
+		}
+	}
+	fmt.Println(count)
+	fmt.Println(countPart2)
+}
+
+func isValid(document string, reqFields []string) bool {
+	for _, reqField := range reqFields {
+		match, err := regexp.MatchString(reqField, document)
+		if err != nil {
+			fmt.Println(err)
+		}
+		if !match {
+			return false
+		}
+	}
+	return true
+}
+
+func isValidPart2(document string) bool {
+	fields := strings.Fields(document)
+	for i := 0; i < len(fields); i++ {
+		field := fields[i]
+		pair := strings.Split(field, ":")
+		switch pair[0] {
+		case "byr":
+			if !checkYear(pair[1], 2002, 1920) {
+				return false
+			}
+		case "iyr":
+			if !checkYear(pair[1], 2020, 2010) {
+				return false
+			}
+		case "eyr":
+			if !checkYear(pair[1], 2030, 2020) {
+				return false
+			}
+		case "hgt":
+			r, _ := regexp.Compile("(cm|in)")
+			switch r.FindString(pair[1]) {
+			case "cm":
+				if !checkYear(pair[1][:len(pair[1])-2], 193, 150) {
+					return false
+				}
+			case "in":
+				if !checkYear(pair[1][:len(pair[1])-2], 76, 59) {
+					return false
+				}
+			default:
+				return false
+			}
+		case "hcl":
+			if match, _ := regexp.MatchString("^#[a-f0-9]{6}", pair[1]); !match{
+				return false
+			}
+		case "ecl":
+			if match, _ := regexp.MatchString(pair[1], "amb blue brn gry grn hzl oth"); !match{
+				return false
+			}
+		case "pid":
+			if match, _ := regexp.MatchString("[0-9]{8}", pair[1]); !match{
+				return false
+			}
+		}
+	}
+	return true
+}
+
+func checkYear(year string, max int, min int) bool {
+	number, err := strconv.Atoi(year)
+	return err == nil && number >= min && number <= max
+}

day4/day4Test.txt

@@ -0,0 +1,13 @@
+ecl:gry pid:860033327 eyr:2020 hcl:#fffffd
+byr:1937 iyr:2017 cid:147 hgt:183cm
+
+iyr:2013 ecl:amb cid:350 eyr:2023 pid:028048884
+hcl:#cfa07d byr:1929
+
+hcl:#ae17e1 iyr:2013
+eyr:2024
+ecl:brn pid:760753108 byr:1931
+hgt:179cm
+
+hcl:#cfa07d eyr:2025 pid:166559648
+iyr:2011 ecl:brn hgt:59in

day4/invalidPassport.txt

@@ -0,0 +1,13 @@
+eyr:1972 cid:100
+hcl:#18171d ecl:amb hgt:170 pid:186cm iyr:2018 byr:1926
+
+iyr:2019
+hcl:#602927 eyr:1967 hgt:170cm
+ecl:grn pid:012533040 byr:1946
+
+hcl:dab227 iyr:2012
+ecl:brn hgt:182cm pid:021572410 eyr:2020 byr:1992 cid:277
+
+hgt:59cm ecl:zzz
+eyr:2038 hcl:74454a iyr:2023
+pid:3556412378 byr:2007

day4/validPassport.txt

@@ -0,0 +1,12 @@
+pid:087499704 hgt:74in ecl:grn iyr:2012 eyr:2030 byr:1980
+hcl:#623a2f
+
+eyr:2029 ecl:blu cid:129 byr:1989
+iyr:2014 pid:896056539 hcl:#a97842 hgt:165cm
+
+hcl:#888785
+hgt:164cm byr:2001 iyr:2015 cid:88
+pid:545766238 ecl:hzl
+eyr:2022
+
+iyr:2010 hgt:158cm hcl:#b6652a ecl:blu byr:1944 eyr:2021 pid:093154719

helper/readFile.go

@@ -15,6 +15,14 @@ func GetInput(filename string) ([]string, error) {
 	return lines, err
 }
 
+func GetFile(filename string) (string, error) {
+	content, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return "", err
+	}
+	return string(content), err
+}
+
 func MapToNumber(strings []string) ([]int, error) {
 	var numbers []int
 	for _, line := range strings {