Refactored main.go to make the entry point clearer

main.go

@@ -17,6 +17,28 @@ import (
 )
 
 func main() {
+	readerFactory, writerFactory, solverFactory, ok := parse_arguments()
+
+	if !ok {
+		return
+	}
+
+	defer utils.Timer("TOTAL", 1)()
+	reader := readerFactory.Get()
+
+	maze, err := parser.Parse(reader)
+	utils.Check(err, "Couldn't read maze")
+
+	solver := solverFactory.Get()
+	solved := solver.Solve(maze)
+
+	writer := writerFactory.Get(solved)
+
+	err = writer.Write()
+	utils.Check(err, "Couldn't write solved maze")
+}
+
+func parse_arguments() (*reader.ReaderFactory, *writer.WriterFactory, *solver.SolverFactory, bool) {
 	argparser := argparse.NewParser("maze-solver", "Solves the given maze (insane, right? who would've guessed?)")
 
 	var verboseLevel *int = argparser.FlagCounter("v", "verbose", &argparse.Options{
@@ -124,7 +146,7 @@ func main() {
 
 	if err := argparser.Parse(os.Args); err != nil {
 		fmt.Println(argparser.Usage(err))
-		return
+		return nil, nil, nil, false
 	}
 	utils.VERBOSE_LEVEL = *verboseLevel
 
@@ -137,18 +159,5 @@ func main() {
 	writerFactory.PathColor = color.RGBA{255, 255, 255, 255}
 	writerFactory.SolutionGradient = colorgrad.Warm()
 
-	defer utils.Timer("TOTAL", 1)()
-
-	reader := readerFactory.Get()
-
-	maze, err := parser.Parse(reader)
-	utils.Check(err, "Couldn't read maze")
-
-	solver := solverFactory.Get()
-	solved := solver.Solve(maze)
-
-	writer := writerFactory.Get(solved)
-
-	err = writer.Write()
-	utils.Check(err, "Couldn't write solved maze")
+	return &readerFactory, &writerFactory, &solverFactory, true
 }