raindrop_v1.go

// Package raindrops provides all the tools for the raindrops exercism task.
package raindrops

import (
	"strconv"
	"strings"
)

// Contains check if string exists in slice
func Contains(text string, slice []string) bool {
	for _, a := range slice {
		if a == text {
			return true
		}
	}
	return false
}

// GetNumberFactors gets a integer as input and returns a slice of all the factors of that number.
func GetNumberFactors(number int) []int {
	var factors []int
	for i := 1; i <= number; i++ {
		if number%i == 0 {
			factors = append(factors, i)
		}
	}
	return factors
}

// Convert gets an integer number and returns the right string output as requested in the task.
func Convert(number int) string {

	factors := GetNumberFactors(number)
	var speark []string

	for _, number := range factors {
		if number%3 == 0 {
			if !Contains("Pling", speark) {
				speark = append(speark, "Pling")
			}

		} else if number%5 == 0 {
			if !Contains("Plang", speark) {
				speark = append(speark, "Plang")
			}
		} else if number%7 == 0 {
			if !Contains("Plong", speark) {
				speark = append(speark, "Plong")
			}
		}
	}

	if len(speark) > 0 {
		return strings.Join(speark, "")
	}
	return strconv.Itoa(number)
}