Implement login prompt

.gitignore

@@ -0,0 +1 @@
+matrix-pretix

go.mod

@@ -1,3 +1,14 @@
 module git.luj0ga.de/franconian/matrix-pretix
 
 go 1.18
+
+require (
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
+	maunium.net/go/mautrix v0.11.0
+)
+
+require (
+	golang.org/x/crypto v0.0.0-20220513210258-46612604a0f9 // indirect
+	golang.org/x/net v0.0.0-20220513224357-95641704303c // indirect
+	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
+)

go.sum

@@ -0,0 +1,14 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
+golang.org/x/crypto v0.0.0-20220513210258-46612604a0f9 h1:NUzdAbFtCJSXU20AOXgeqaUwg8Ypg4MPYmL+d+rsB5c=
+golang.org/x/crypto v0.0.0-20220513210258-46612604a0f9/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/net v0.0.0-20220513224357-95641704303c h1:nF9mHSvoKBLkQNQhJZNsc66z2UzAMUbLGjC95CF3pU0=
+golang.org/x/net v0.0.0-20220513224357-95641704303c/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
+golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+maunium.net/go/mautrix v0.11.0 h1:B1FBHcvE4Mud+AC+zgNQQOw0JxSVrt40watCejhVA7w=
+maunium.net/go/mautrix v0.11.0/go.mod h1:K29EcHwsNg6r7fMfwvi0GHQ9o5wSjqB9+Q8RjCIQEjA=

internal/matrix/client.go

@@ -0,0 +1,9 @@
+package matrix
+
+import (
+	"maunium.net/go/mautrix"
+)
+
+type Client struct {
+	client	*mautrix.Client
+}

internal/matrix/login.go

@@ -0,0 +1,8 @@
+package matrix
+
+import "fmt"
+
+func Login(identifier, password string) error {
+	fmt.Println(identifier, password)
+	return nil
+}

internal/util/prompt.go

@@ -0,0 +1,49 @@
+package util
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+	"syscall"
+
+	"golang.org/x/term"
+)
+
+type Prompter struct {
+	scanner	*bufio.Scanner
+}
+
+func NewPrompter(scanner *bufio.Scanner) *Prompter {
+	return &Prompter{scanner}
+}
+
+func (p Prompter) Prompt(prompt string) (string, error) {
+	printPrompt(prompt)
+
+	if p.scanner.Scan() {
+		return strings.TrimSpace(p.scanner.Text()), nil
+	}
+
+	if err := p.scanner.Err(); err != nil {
+		return "", err
+	}
+
+	return "", fmt.Errorf("%s must not be empty", prompt)
+}
+
+func PromptForPassword(prompt string) (string, error) {
+	printPrompt(prompt)
+
+	password, err := term.ReadPassword(int(syscall.Stdin))
+	fmt.Fprintln(os.Stderr)
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(string(password)), nil
+}
+
+func printPrompt(prompt string) {
+	fmt.Fprint(os.Stderr, prompt, ": ")
+}

main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+
+	"git.luj0ga.de/franconian/matrix-pretix/internal/matrix"
+	"git.luj0ga.de/franconian/matrix-pretix/internal/util"
+)
+
+func login() {
+	prompter := util.NewPrompter(bufio.NewScanner(os.Stdin))
+
+	identifier, err := prompter.Prompt("user id")
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+	password, err := util.PromptForPassword("password")
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+	err = matrix.Login(identifier, password)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func run() {
+}
+
+func main() {
+	switch {
+	case len(os.Args) == 2 && os.Args[1] == "login":
+		login()
+	case len(os.Args) == 1:
+		run()
+	default:
+		fmt.Fprintf(os.Stderr, "usage: %s [ \"\" | \"login\" ]\n", os.Args[0])
+		os.Exit(1)
+	}
+}