85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
package main
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import (
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"bytes"
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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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calendar "google.golang.org/api/calendar/v3"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/google"
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)
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type CalClient struct {
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rawClientSecret []byte
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rawToken []byte
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ctx context.Context
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cfg *oauth2.Config
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tkn *oauth2.Token
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client *http.Client
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}
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func CreateClient(secret, tkn []byte) *CalClient {
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var err error
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c := CalClient{
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rawClientSecret: []byte(secret),
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rawToken: []byte(tkn),
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}
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c.ctx = context.Background()
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c.cfg, err = google.ConfigFromJSON(c.rawClientSecret, calendar.CalendarScope)
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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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// Try to create the client with the passed token
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c.client, err = c.GetClient()
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if err != nil {
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log.Fatalf("unable to create client: %v", err)
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}
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return &c
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}
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func (c *CalClient) GetClient() (*http.Client, error) {
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err := c.tokenFromRaw()
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if err != nil {
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err = c.tokenFromWeb()
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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 c.cfg.Client(c.ctx, c.tkn), nil
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}
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func (c *CalClient) tokenFromRaw() error {
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c.tkn = &oauth2.Token{}
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tmpToken := bytes.NewBuffer(c.rawToken)
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err := json.NewDecoder(tmpToken).Decode(c.tkn)
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return err
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}
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func (c *CalClient) tokenFromWeb() error {
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var err error
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authURL := c.cfg.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
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fmt.Printf("Go to the following link in your browser then type the authorization code:\n%v\n", authURL)
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var code string
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if _, err := fmt.Scan(&code); err != nil {
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log.Fatalf("Unable to read authorization code %v", err)
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}
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c.tkn, err = c.cfg.Exchange(oauth2.NoContext, code)
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return err
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}
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func (c *CalClient) TokenToRaw() {
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var tmpToken bytes.Buffer
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t := c.tkn
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json.NewEncoder(&tmpToken).Encode(t)
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c.rawToken = tmpToken.Bytes()
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}
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