Initial commit: perc v0.0.0 - percentage calculatorv0.0.0

Amp-Thread-ID: https://ampcode.com/threads/T-e4f4a959-8cc6-4ac0-b6fb-2779867e8b2a
Co-authored-by: Amp <amp@ampcode.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/cmd/perc/main.go b/cmd/perc/main.go
new file mode 100644
index 0000000..a5764b5
--- /dev/null
+++ b/cmd/perc/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"codeberg.org/snonux/perc/internal"
+	"codeberg.org/snonux/perc/internal/calculator"
+)
+
+func main() {
+	output, err := runCommand(os.Args)
+	if err != nil {
+		fmt.Println("Error:", err)
+		os.Exit(1)
+	}
+	fmt.Println(output)
+}
+
+func runCommand(args []string) (string, error) {
+	if len(args) < 2 {
+		printUsage()
+		return "", fmt.Errorf("no input provided")
+	}
+
+	if args[1] == "version" {
+		return internal.Version, nil
+	}
+
+	input := strings.Join(args[1:], " ")
+	result, err := calculator.Parse(input)
+	if err != nil {
+		return "", err
+	}
+
+	return result, nil
+}
+
+func printUsage() {
+	fmt.Println("Usage: perc <calculation>")
+	fmt.Println("       perc version")
+	fmt.Println("\nExamples:")
+	fmt.Println("  perc 20% of 150")
+	fmt.Println("  perc what is 20% of 150")
+	fmt.Println("  perc 30 is what % of 150")
+	fmt.Println("  perc 30 is 20% of what")
+}