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|
// Creating a job to import Monzo transactions into YNAB.
//
// This is going to run N times per 24 hours.
package main
import (
"fmt"
"log"
"net/http"
"os"
"os/exec"
)
var (
clientId = os.Getenv("client_id")
clientSecret = os.Getenv("client_secret")
accessToken = nil
refreshToken = nil
)
const (
state = "xyz123"
redirectUri = "http://localhost:8080/authorize"
)
func getAccessCode(string authCode) {
form := map[string]string{
"grant_type": "authorization_code",
"client_id": client_id,
"client_secret": client_secret,
"redirect_uri": redirectUri,
"code": authCode,
}
json := map[string]string{
"access_token": "access_token",
"client_id": "client_id",
"expires_in": 21600,
"refresh_token": "refresh_token",
"token_type": "Bearer",
"user_id": "user_id",
}
// TODO: Handle retry with backoff logic here.
resp, error := http.Post("https://api.monzo.com/oauth2/token", form.Form(), json.Json())
if err != nil {
log.Fatal("Could not exchange authorization code for an access token.")
}
resp.Body()
}
func handleRedirect(w http.ResponseWriter, r *http.Request) {
// assert that `r.state` is the same as `state`.
params := r.URL.Query()
reqState := params["state"][0]
reqCode := params["code"][0]
if reqState != state {
log.Fatal(fmt.Sprintf("Value for state returned by Monzo does not equal our state. %s != %s", reqState, state))
}
go getAccessCode(reqCode)
fmt.Printf("Received the authorization code from Monzo: %s", reqCode)
fmt.Fprintf(w, fmt.Sprintf("Authorization code: %s", reqCode))
}
func authorizeClient() {
url :=
fmt.Sprintf("https://auth.monzo.com/?client_id=%s&redirect_uri=%s&response_type=code&state=%s",
clientId, redirectUri, state)
exec.Command("google-chrome", url).Start()
}
func main() {
authorizeClient()
http.HandleFunc("/authorize", handleRedirect)
go log.Fatal(http.ListenAndServe(":8080", nil))
}
|
