Implement most rove commands

Need to finish up /commands

	Need to pretify output of others

cmd/rove/main.go

@@ -1,7 +1,164 @@
 package main
 
-import "flag"
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+
+	"github.com/mdiluz/rove/pkg/rove"
+)
+
+var USAGE = ""
+
+// Command usage
+func Usage() {
+	fmt.Printf("Usage: %s [OPTIONS]... COMMAND\n", os.Args[0])
+	fmt.Println("\nCommands:")
+	fmt.Println("\tstatus  \tprints the server status")
+	fmt.Println("\tregister\tregisters an account and stores it (use with -name)")
+	fmt.Println("\tspawn   \tspawns a rover for the current account")
+	fmt.Println("\tcommands\tissues commands to the rover")
+	fmt.Println("\tradar   \tgathers radar data for the current rover")
+	fmt.Println("\nOptions:")
+	flag.PrintDefaults()
+}
+
+var home = os.Getenv("HOME")
+var filepath = path.Join(home, ".local/share/rove.json")
+
+var host = flag.String("host", "api.rove-game.com", "path to game host server")
+var dataPath = flag.String("data", filepath, "data file for storage")
+
+// Data is used to store internal data
+type Data struct {
+	Account string `json:"account,omitempty"`
+	Host    string `json:"host,omitempty"`
+}
+
+var name = flag.String("name", "", "used with status command for the account name")
+
+func verifyId(d Data) {
+	if len(d.Account) == 0 {
+		fmt.Fprintf(os.Stderr, "No account ID set, must register first or set \"account\" value in %s\n", *dataPath)
+		os.Exit(1)
+	}
+}
 
 func main() {
+	flag.Usage = Usage
 	flag.Parse()
+
+	// Verify we have a single command line arg
+	args := flag.Args()
+	if len(args) != 1 {
+		Usage()
+		os.Exit(1)
+	}
+
+	// Load in the persistent file
+	var data = Data{}
+	_, err := os.Stat(*dataPath)
+	if !os.IsNotExist(err) {
+		// Read and unmarshal the json
+		if b, err := ioutil.ReadFile(*dataPath); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to read file %s error: %s\n", *dataPath, err)
+			os.Exit(1)
+		} else if len(b) == 0 {
+			fmt.Fprintf(os.Stderr, "file %s was empty, assumin fresh data\n", *dataPath)
+
+		} else if err := json.Unmarshal(b, &data); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to unmarshal file %s error: %s\n", *dataPath, err)
+			os.Exit(1)
+		}
+	}
+
+	var server = rove.Server(*host)
+
+	command := args[0]
+	switch command {
+	case "status":
+		if response, err := server.Status(); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+
+		} else {
+			fmt.Printf("Ready: %t\n", response.Ready)
+			fmt.Printf("Version: %s\n", response.Version)
+		}
+	case "register":
+		d := rove.RegisterData{
+			Name: *name,
+		}
+		if response, err := server.Register(d); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+
+		} else if !response.Success {
+			fmt.Fprintf(os.Stderr, "Server returned failure: %s\n", response.Error)
+			os.Exit(1)
+
+		} else {
+			fmt.Printf("Registered account with id: %s\n", response.Id)
+			data.Account = response.Id
+		}
+	case "spawn":
+		verifyId(data)
+		d := rove.SpawnData{Id: data.Account}
+		if response, err := server.Spawn(d); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+
+		} else if !response.Success {
+			fmt.Fprintf(os.Stderr, "Server returned failure: %s\n", response.Error)
+			os.Exit(1)
+
+		} else {
+			fmt.Printf("Spawned at position %+v\n", response.Position)
+		}
+	case "commands":
+		verifyId(data)
+		d := rove.CommandsData{Id: data.Account}
+		// TODO: Send real commands in
+		if response, err := server.Commands(d); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+
+		} else if !response.Success {
+			fmt.Fprintf(os.Stderr, "Server returned failure: %s\n", response.Error)
+			os.Exit(1)
+
+		} else {
+			// TODO: Pretify the response
+			fmt.Printf("%+v\n", response)
+		}
+	case "radar":
+		verifyId(data)
+		d := rove.RadarData{Id: data.Account}
+		if response, err := server.Radar(d); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+
+		} else if !response.Success {
+			fmt.Fprintf(os.Stderr, "Server returned failure: %s\n", response.Error)
+			os.Exit(1)
+
+		} else {
+			// TODO: Pretify the response
+			fmt.Printf("%+v\n", response)
+		}
+	}
+
+	// Save out the persistent file
+	if b, err := json.MarshalIndent(data, "", "\t"); err != nil {
+		fmt.Fprintf(os.Stderr, "failed to marshal data error: %s\n", err)
+		os.Exit(1)
+	} else {
+		if err := ioutil.WriteFile(*dataPath, b, os.ModePerm); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to save file %s error: %s\n", *dataPath, err)
+			os.Exit(1)
+		}
+	}
 }