mirror of
https://github.com/rjNemo/rentease.git
synced 2026-06-06 02:36:49 +00:00
131 lines
3.3 KiB
Go
131 lines
3.3 KiB
Go
package calendar
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import (
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"context"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"os"
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"strings"
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"time"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/google"
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"google.golang.org/api/calendar/v3"
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"google.golang.org/api/option"
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)
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const tokFile = "token.json"
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type Service struct {
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calIds map[string]string
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*calendar.Service
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}
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func NewService(ctx context.Context, credJson string, opts ...Option) (*Service, error) {
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b := []byte(credJson)
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config, err := google.ConfigFromJSON(b, calendar.CalendarReadonlyScope)
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if err != nil {
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log.Fatalf("Unable to parse client secret file to config: %v", err)
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}
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client := getClient(ctx, config)
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srv, err := calendar.NewService(ctx, option.WithHTTPClient(client))
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if err != nil {
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log.Fatalf("Unable to retrieve Calendar client: %v", err)
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}
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s := &Service{
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Service: srv,
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calIds: make(map[string]string),
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}
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for _, opt := range opts {
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err := opt(s)
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if err != nil {
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return nil, err
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}
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}
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return &Service{Service: srv}, nil
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}
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// TODO: implement create event, list events in a period, delete event
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func (s *Service) Create(from, to time.Time) (*calendar.Event, error) {
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l := s.CalendarList.List()
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r, e := l.Do()
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log.Println(e)
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for _, c := range r.Items {
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log.Printf("%+v: %s", c.Summary, c.Id)
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}
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return nil, nil
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}
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func (s *Service) List(from, to time.Time) (*calendar.Events, error) { return nil, nil }
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func (s *Service) Delete(id int) error { return nil }
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// Retrieve a token, saves the token, then returns the generated client.
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func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
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// The file token.json stores the user's access and refresh tokens, and is
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// created automatically when the authorization flow completes for the first
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// time.
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// tok, err := tokenFromFile(tokFile)
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tok, err := tokenFromEnv()
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if err != nil {
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tok = getTokenFromWeb(config)
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saveToken(tokFile, tok)
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}
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return config.Client(ctx, tok)
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}
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// Request a token from the web, then returns the retrieved token.
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func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
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authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
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fmt.Printf("Click on the following link to open in your browser \n%v\n", authURL)
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// TODO: write a callback endpoint that will parse the auth code from the URL
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var authCode string
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fmt.Print("Type the authorization code: \n> ")
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if _, err := fmt.Scan(&authCode); err != nil {
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log.Fatalf("Unable to read authorization code: %v", err)
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}
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tok, err := config.Exchange(context.TODO(), authCode)
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if err != nil {
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log.Fatalf("Unable to retrieve token from web: %v", err)
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}
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return tok
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}
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// Retrieves a token from a local file.
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func tokenFromFile(file string) (*oauth2.Token, error) {
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f, err := os.Open(file)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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tok := &oauth2.Token{}
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err = json.NewDecoder(f).Decode(tok)
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return tok, err
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}
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func tokenFromEnv() (*oauth2.Token, error) {
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t := os.Getenv("CALENDAR_TOKEN")
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f := strings.NewReader(t)
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tok := &oauth2.Token{}
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err := json.NewDecoder(f).Decode(tok)
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return tok, err
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}
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// Saves a token to a file path.
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func saveToken(path string, token *oauth2.Token) {
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fmt.Printf("Saving credential file to: %s\n", path)
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f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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log.Fatalf("Unable to cache oauth token: %v", err)
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}
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defer f.Close()
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_ = json.NewEncoder(f).Encode(token)
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}
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