Load credentials from config file instead of requiring user to manually enter them

internal/config/config.go

@@ -0,0 +1,30 @@
+package config
+
+import (
+	"encoding/json"
+	"os"
+)
+
+type Config struct {
+	Matrix	MatrixConfig
+}
+
+type MatrixConfig struct {
+	HomeserverURL	string
+	UserIdentifier	string
+	Password	string
+}
+
+func ParseFromFile(path string) (config *Config, err error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	err = json.Unmarshal(data, config)
+	if err != nil {
+		return nil, err
+	}
+
+	return config, nil
+}

internal/matrix/client.go

@@ -1,9 +1,29 @@
 package matrix
 
 import (
+	"git.luj0ga.de/franconian/matrix-pretix/internal/config"
+
 	"maunium.net/go/mautrix"
 )
 
-type Client struct {
-	client	*mautrix.Client
+func NewClient(config *config.MatrixConfig) (*mautrix.Client, error) {
+	client, err := mautrix.NewClient(config.HomeserverURL, "", "")
+	if err != nil {
+		return nil, err
+	}
+
+	_, err := client.Login(&mautrix.ReqLogin{
+		Type:			mautrix.AuthTypePassword,
+		Identifier:		mautrix.UserIdentifier{
+			Type:	mautrix.IdentifierTypeUser,
+			User:	config.UserIdentifier,
+		},
+		Password:		config.Password,
+		StoreCredentials:	true,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return client, nil
 }

internal/matrix/login.go

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

main.go

@@ -1,47 +1,24 @@
 package main
 
 import (
-	"bufio"
-	"fmt"
-	"os"
+	"log"
 
+	"git.luj0ga.de/franconian/matrix-pretix/internal/config"
 	"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)
+	if len(os.Args) != 2 {
+		log.Fatal("missing config file path")
+	}
+
+	config, err := config.ParseFromFile(os.Args[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	client, err := matrix.NewClient(&config.Matrix)
+	if err != nil {
+		log.Fatal(err)
 	}
 }