Sendgrid CLI

cmd/sendgrid/main.go

@@ -0,0 +1,121 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/joho/godotenv"
+	"github.com/rotationalio/ensign/pkg"
+	"github.com/rotationalio/ensign/pkg/utils/sendgrid"
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	// If a dotenv file exists load it for configuration
+	godotenv.Load()
+
+	// Creates a multi-command CLI application
+	app := cli.NewApp()
+	app.Name = "sendgrid"
+	app.Version = pkg.Version()
+	app.Usage = "interact with the sendgrid API"
+	app.Flags = []cli.Flag{}
+	app.Commands = []*cli.Command{
+		{
+			Name:     "lists",
+			Usage:    "fetch marketing lists from sendgrid",
+			Category: "api",
+			Action:   fetchLists,
+			Flags: []cli.Flag{
+				&cli.StringFlag{
+					Name:    "apikey",
+					Aliases: []string{"k"},
+					Usage:   "sendgrid API key",
+				},
+			},
+		},
+		{
+			Name:     "defs",
+			Usage:    "fetch field definitions from sendgrid",
+			Category: "api",
+			Action:   fetchDefs,
+			Flags: []cli.Flag{
+				&cli.StringFlag{
+					Name:    "apikey",
+					Aliases: []string{"k"},
+					Usage:   "sendgrid API key",
+				},
+			},
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		log.Fatal(err)
+	}
+}
+
+//===========================================================================
+// SendGrid API Commands
+//===========================================================================
+
+func fetchLists(c *cli.Context) (err error) {
+	key := apiKey(c)
+	if key == "" {
+		return cli.Exit("specify sendgrid api key in command line or environment", 1)
+	}
+
+	// Fetch a page of sendgrid marketing lists
+	// Note: Default page size is 100 so we should get everything in one request
+	var rep string
+	if rep, err = sendgrid.MarketingLists(key, ""); err != nil {
+		return cli.Exit(err, 1)
+	}
+
+	// Print the response
+	printJSON(rep)
+	return nil
+}
+
+func fetchDefs(c *cli.Context) (err error) {
+	key := apiKey(c)
+	if key == "" {
+		return cli.Exit("specify sendgrid api key in command line or environment", 1)
+	}
+
+	// Fetch the field definitions
+	var rep string
+	if rep, err = sendgrid.FieldDefinitions(key); err != nil {
+		return cli.Exit(err, 1)
+	}
+
+	// Print the response
+	printJSON(rep)
+	return nil
+}
+
+//===========================================================================
+// Helpers
+//===========================================================================
+
+// Get the API key from the command line or environment
+func apiKey(c *cli.Context) string {
+	key := c.String("apikey")
+	if key == "" {
+		key = os.Getenv("SENDGRID_API_KEY")
+	}
+
+	return key
+}
+
+// Print a JSON string response to stdout and add indents for readability
+func printJSON(rep string) {
+	out := &bytes.Buffer{}
+	if err := json.Indent(out, []byte(rep), "", "  "); err != nil {
+		cli.Exit(err, 1)
+	}
+
+	fmt.Println(out.String())
+}