implentented token and added comments

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bufio"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -10,60 +11,100 @@ import (
 	"os"
 )
 
+type app struct {
+	ClientId     string `json:"client_id"`
+	ClientSecret string `json:"client_secret"`
+}
+
+type user struct {
+	Username    string `json:"username"`
+	Instance    string `json:"instance"`
+	AccessToken string `json:"access_token"`
+}
+
 var BASE_URL = "https://awoo.fai.st"
-var BASE_API_URL = "https://awoo.fai.st/api/v1"
+var DEFAULT_REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob"
 
 func main() {
-	client_id, client_secret, err := get_app_credentials()
+	// Get the `client_id` and the `client_secret` values
+	app, err := getAppCredentials(BASE_URL)
 	if err != nil {
 		log.Fatal(err)
 	}
-	fmt.Println(client_id, client_secret)
+	fmt.Println(getTokenUrl(BASE_URL, app))
+
+	// Read the token
+	fmt.Print("Enter token: ")
+	reader := bufio.NewReader(os.Stdin)
+	token, err := reader.ReadString('\n')
+	if err != nil {
+		log.Fatal(err)
+	}
+	token = token[:len(token)-1]
+	fmt.Println(token)
 }
 
-func get_app_credentials() (string, string, error) {
+func getTokenUrl(instance string, app *app) string {
+	return fmt.Sprintf("%s/oauth/authorize?response_type=code&client_id=%s&redirect_uri=%s", BASE_URL, app.ClientId, DEFAULT_REDIRECT_URI)
+}
+
+func getAppCredentials(instance string) (*app, error) {
+	// We try to read the file `credentials.json` to read
+	// the application's credentials
+	// If it doesn't exist, we generate a new application
 	contents, err := os.ReadFile("credentials.json")
 	if err != nil {
-		return create_app()
+		return createApp(instance)
 	}
-	var json_data map[string]string
-	err = json.Unmarshal(contents, &json_data)
-	if err != nil {
-		return "", "", err
-	}
-	client_id := json_data["client_id"]
-	client_secret := json_data["client_secret"]
 
-	return client_id, client_secret, nil
+	// The file's contents are unmarshalled into a map
+	var credentials app
+	err = json.Unmarshal(contents, &credentials)
+	if err != nil {
+		return nil, err
+	}
+
+	return &credentials, nil
 }
 
-func create_app() (string, string, error) {
+func createApp(instance string) (*app, error) {
+	// Define the values to the request for creating the app
 	data := url.Values{
 		"client_name":   {"grames"},
-		"redirect_uris": {"urn:ietf:wg:oauth:2.0:oob"},
+		"redirect_uris": {DEFAULT_REDIRECT_URI},
 	}
 
-	resp, err := http.PostForm(BASE_API_URL+"/apps", data)
-
+	// Send request to create app
+	resp, err := http.PostForm(instance+"/api/v1/apps", data)
 	if err != nil {
-		return "", "", err
+		return nil, err
 	}
 	defer resp.Body.Close()
+
+	// Read the body's JSON response into `contents` as []byte
 	contents, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return "", "", err
+		return nil, err
 	}
-	err = os.WriteFile("credentials.json", contents, 0644)
-	if err != nil {
-		return "", "", err
-	}
-	var json_data map[string]string
-	err = json.Unmarshal(contents, &json_data)
-	if err != nil {
-		return "", "", err
-	}
-	client_id := json_data["client_id"]
-	client_secret := json_data["client_secret"]
 
-	return client_id, client_secret, nil
+	// Unmarshal the JSON data into an app struct
+	var credentials app
+	err = json.Unmarshal(contents, &credentials)
+	if err != nil {
+		return nil, err
+	}
+
+	// Marshal the app into JSON data
+	b, err := json.MarshalIndent(credentials, "", "  ")
+	if err != nil {
+		return nil, err
+	}
+
+	// Write the JSON data into the file `credentials.json`
+	err = os.WriteFile("credentials.json", b, 0644)
+	if err != nil {
+		return nil, err
+	}
+
+	return &credentials, nil
 }