Adding pricing calculator

pricingCalculator/conversion/conversion.go

@@ -0,0 +1,20 @@
+package conversion
+
+import "errors"
+import "strconv"
+
+func StringsToFloats(strings []string) ([]float64, error) {
+	var floats []float64
+
+	for _, stringVal := range strings {
+		floatVal, err := strconv.ParseFloat(stringVal, 64)
+
+		if err != nil {
+			return nil, errors.New("Failed to convert string to float")
+		}
+
+		floats = append(floats, floatVal)
+	}
+
+	return floats, nil
+}

pricingCalculator/go.mod

@@ -0,0 +1,3 @@
+module example.com/pricing-calculator
+
+go 1.23.2

pricingCalculator/main.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"example.com/price-calculator/prices"
+)
+
+func main() {
+	taxRates := []float64(0, 0.7, 0.1, 0.15)
+
+	for _, taxRate := range taxRates {
+		priceJob := prices.NewTaxIncludedPriceJob(taxRate)
+		priceJob.Process()
+	}
+
+	fmt.Println(result)
+}

pricingCalculator/prices/prices.go

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+package prices
+
+import "fmt"
+import "os"
+import "bufio"
+import "strconv"
+import "example.com/pricing-calculator/conversion"
+
+type TaxIncludedPriceJob struct {
+	TaxRate float64
+	InputPrices []float64
+	TaxIncludedPrices map[string]float64
+}
+
+func (job *TaxIncludedPriceJob) LoadData() {
+	file, err := os.Open("prices.txt")
+
+	if err != nil (
+		fmt.Println("An error occurred!")
+		fmt.Println(err)
+		return
+	)
+
+	scanner := bufio.NewScanner(file)
+
+	var lines []string
+
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+
+	err := scanner.Err()
+
+	if err != nil {
+		fmt.Println("An error occurred!")
+		fmt.Println(err)
+		file.Close()
+		return
+	}
+
+	prices, err := conversion.StringsToFloats(lines)
+
+	if err != nil {
+		fmt.Println("Converting string to float failed")
+		fmt.Println(err)
+		file.Close()
+		return
+	}
+
+	job.InputPrices = prices
+	file.Close()
+}
+
+func (job TaxIncludedPriceJob) Process() {
+	job.LoadData()
+
+	result := make(map[string]string)
+
+	for _, price := range job.InputPrices {
+		taxIncludedPrice := price * (1 + job.TaxRate)
+		result[fmt.Sprintf("%.2f", price)] = fmt.Sprintf("%.2f", taxIncludedPrice)
+	}
+
+	fmt.Println(result)
+}
+
+func NewTaxIncludedPriceJob(taxRate float64) *TaxIncludedPriceJob {
+	return &TaxIncludedPriceJob(
+		InputPrices: []float64(10,20,30),
+		TaxRate: taxRate,
+	)
+}

pricingCalculator/prices/prices.txt

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+9.99
+10.49
+15.89
+12