Add "process-mail" CLI command (resolves #8)

Author: Pharb

main.go

@@ -1,7 +1,89 @@
 package main
 
-import "fmt"
+import (
+"fmt"
+"github.com/TNG/gpg-validation-server/mail"
+"github.com/codegangsta/cli"
+"io"
+"log"
+"os"
+)
+
+const errorExitCode = 1
+
+func appAction(c *cli.Context) error {
+fmt.Println("Args", c.Args())
+fmt.Println("host", c.String("host"))
+// TODO #11 Start the servers
+return nil
+}
+
+func processMailAction(c *cli.Context) error {
+var err error
+var input io.Reader
+
+file := c.String("file")
+
+if file == "" {
+input = os.Stdin
+} else {
+
+input, err = os.Open(file)
+if err != nil {
+return err
+}
+}
+
+entity, _ := mail.ParseMail(input)
+log.Println(entity)
+
+return nil
+}
+
+func cliErrorHandler(action func(*cli.Context) error) func(*cli.Context) cli.ExitCoder {
+return func(c *cli.Context) cli.ExitCoder {
+if err := action(c); err != nil {
+return cli.NewExitError(fmt.Sprint("Error: ", err), errorExitCode)
+}
+return nil
+}
+}
+
+func runApp(args []string) {
+app := cli.NewApp()
+app.Name = "GPG Validation Service"
+app.Usage = "Run a server that manages email verification and signs verified keys with the servers GPG key."
+
+app.Commands = []cli.Command{
+{
+Name: "process-mail",
+Usage: "process an incoming email",
+Action: cliErrorHandler(processMailAction),
+Flags: []cli.Flag{
+cli.StringFlag{
+Name: "file",
+Value: "",
+Usage: "`FILE_PATH` of the mail file, omit to read from stdin ",
+},
+},
+},
+}
+
+app.Action = cliErrorHandler(appAction)
+app.Flags = []cli.Flag{
+cli.StringFlag{
+Name: "host",
+Value: "localhost",
+Usage: "`HOST` of the mail server",
+},
+}
+
+err := app.Run(args)
+if err != nil {
+cli.OsExiter(errorExitCode)
+}
+}
 
 func main() {
-fmt.Println("gpg-validation-server")
+runApp(os.Args)
 }

main_test.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+"github.com/codegangsta/cli"
+"testing"
+)
+
+const okExitCode = 0
+
+func getMockOsExiter(t *testing.T, expectedExitCode int) func(int) {
+return func(code int) {
+if code != expectedExitCode {
+t.Fatalf("Unexpected exit code: expected %d, got %d", expectedExitCode, code)
+}
+}
+}
+
+func testMainWithArguments(t *testing.T, expectedExitCode int, args ...string) {
+cli.OsExiter = getMockOsExiter(t, expectedExitCode)
+
+appArgs := append([]string{"name-of-binary"}, args...)
+runApp(appArgs)
+}
+
+func TestRunMain(t *testing.T) {
+testMainWithArguments(t, okExitCode)
+}
+
+func TestProcessMailDefault(t *testing.T) {
+testMainWithArguments(t, okExitCode, "process-mail")
+}
+
+func TestProcessMailFile(t *testing.T) {
+testMainWithArguments(t, okExitCode, "process-mail", "--file", "./test-mails/plaintext.eml")
+}
+
+func TestProcessFileError(t *testing.T) {
+testMainWithArguments(t, errorExitCode, "process-mail", "--file", "./invalid")
+}

test-mails/plaintext.eml

@@ -0,0 +1,11 @@
+Date: Fri, 13 May 2016 13:00:00 -0700
+From: Tests <server@server.local>
+To: TNG/gpg-validation-server <gpg-validation-server@noreply.github.com>
+Cc:
+Subject: What a subject
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=UTF-8
+Content-Transfer-Encoding: 7bit
+
+This is some nice plain text!

test.sh

@@ -3,7 +3,7 @@
 set -e
 echo "" > coverage.txt
 
-for d in $(find ./* -maxdepth 10 -type d); do
+for d in . $(find ./* -maxdepth 10 -type d); do
  if ls $d/*.go &> /dev/null; then
  go test -v -coverprofile=profile.out -covermode=atomic $d
  if [ -f profile.out ]; then