add registration function

.golangci.yaml

@@ -18,5 +18,6 @@ linters-settings:
 
 linters:
   enable-all: true
-  # disable:
+  disable:
+  #- json
   fast: false

main.go

@@ -1,7 +1,114 @@
 package main
 
-import "fmt"
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
 
 func main() {
-	fmt.Println("Hello, Enbas!")
+	register()
+}
+
+const (
+	applicationName = "Enbas"
+	redirectUris    = "urn:ietf:wg:oauth:2.0:oob"
+)
+
+type AccountConfig struct {
+	CurrentAccount string             `json:"currentAccount"`
+	Accounts       map[string]Account `json:"accounts"`
+}
+
+type Account struct {
+	Instance     string `json:"instance"`
+	ClientID     string `json:"clientId"`
+	ClientSecret string `json:"clientSecret"`
+	AccessToken  string `json:"accessToken"`
+}
+
+type RegisterRequest struct {
+	ClientName   string `json:"client_name"`
+	RedirectUris string `json:"redirect_uris"`
+	Scopes       string `json:"scopes"`
+	Website      string `json:"website"`
+}
+
+type RegisterResponse struct {
+	ClientID     string `json:"client_id"`
+	ClientSecret string `json:"client_secret"`
+	ID           string `json:"id"`
+	Name         string `json:"name"`
+	RedirectUri  string `json:"redirect_uri"`
+	VapidKey     string `json:"vapid_key"`
+	Website      string `json:"website"`
+}
+
+func register() Account {
+	// ask user for instance, if not start with http(s), prepend with https.
+	fmt.Print("Please enter the instance URL: ")
+
+	instance := ""
+	if _, err := fmt.Scanln(&instance); err != nil {
+		panic(err)
+	}
+
+	request := RegisterRequest{
+		ClientName:   applicationName,
+		RedirectUris: redirectUris,
+		Scopes:       "read",
+		Website:      "",
+	}
+
+	data, err := json.Marshal(request)
+	if err != nil {
+		panic(err)
+	}
+
+	httpRequestBody := bytes.NewBuffer(data)
+
+	path := "/api/v1/apps"
+	url := instance + path
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	httpRequest, err := http.NewRequestWithContext(ctx, http.MethodPost, url, httpRequestBody)
+	if err != nil {
+		panic(err)
+	}
+
+	httpRequest.Header.Add("Content-Type", "application/json")
+	httpRequest.Header.Set("User-Agent", "Enbas/0.0.0")
+
+	httpClient := http.Client{}
+
+	httpResponse, err := httpClient.Do(httpRequest)
+	if err != nil {
+		panic(err)
+	}
+
+	defer httpResponse.Body.Close()
+
+	var registerResponse RegisterResponse
+
+	if err := json.NewDecoder(httpResponse.Body).Decode(&registerResponse); err != nil {
+		panic(err)
+	}
+
+	fmt.Println(registerResponse)
+
+	fmt.Println("Please sign into your instance with your browser and enter the access token\nAccess token: ")
+
+	account := Account{
+		Instance:     instance,
+		ClientID:     registerResponse.ClientID,
+		ClientSecret: registerResponse.ClientSecret,
+		AccessToken:  "",
+	}
+
+	return account
 }