feat: add Google Photo support (#1853)

* feat: add Google Photo support

* fix: fetch all pages

* chore(google_photo): add meta info

Co-authored-by: Noah Hsu <i@nn.ci>

drivers/google_photo/util.go

@@ -0,0 +1,105 @@
+package google_photo
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/alist-org/alist/v3/drivers/base"
+	"github.com/go-resty/resty/v2"
+)
+
+// do others that not defined in Driver interface
+
+func (d *GooglePhoto) refreshToken() error {
+	url := "https://www.googleapis.com/oauth2/v4/token"
+	var resp base.TokenResp
+	var e TokenError
+	_, err := base.RestyClient.R().SetResult(&resp).SetError(&e).
+		SetFormData(map[string]string{
+			"client_id":     d.ClientID,
+			"client_secret": d.ClientSecret,
+			"refresh_token": d.RefreshToken,
+			"grant_type":    "refresh_token",
+		}).Post(url)
+	if err != nil {
+		return err
+	}
+	if e.Error != "" {
+		return fmt.Errorf(e.Error)
+	}
+	d.AccessToken = resp.AccessToken
+	return nil
+}
+
+func (d *GooglePhoto) request(url string, method string, callback base.ReqCallback, resp interface{}, headers map[string]string) ([]byte, error) {
+	req := base.RestyClient.R()
+	req.SetHeader("Authorization", "Bearer "+d.AccessToken)
+	if headers != nil {
+		req.SetHeaders(headers)
+	}
+
+	if callback != nil {
+		callback(req)
+	}
+	if resp != nil {
+		req.SetResult(resp)
+	}
+	var e Error
+	req.SetError(&e)
+	res, err := req.Execute(method, url)
+	if err != nil {
+		return nil, err
+	}
+	if e.Error.Code != 0 {
+		if e.Error.Code == 401 {
+			err = d.refreshToken()
+			if err != nil {
+				return nil, err
+			}
+			return d.request(url, method, callback, resp, headers)
+		}
+		return nil, fmt.Errorf("%s: %v", e.Error.Message, e.Error.Errors)
+	}
+	return res.Body(), nil
+}
+
+func (d *GooglePhoto) getFiles() ([]MediaItem, error) {
+	pageToken := "first"
+	res := make([]MediaItem, 0)
+	for pageToken != "" {
+		if pageToken == "first" {
+			pageToken = ""
+		}
+		var resp Files
+		query := map[string]string{
+			"fields":    "mediaItems(id,baseUrl,mimeType,mediaMetadata,filename),nextPageToken",
+			"pageSize":  "100",
+			"pageToken": pageToken,
+		}
+		_, err := d.request("https://photoslibrary.googleapis.com/v1/mediaItems", http.MethodGet, func(req *resty.Request) {
+			req.SetQueryParams(query)
+		}, &resp, nil)
+		if err != nil {
+			return nil, err
+		}
+		pageToken = resp.NextPageToken
+		res = append(res, resp.MediaItems...)
+	}
+	return res, nil
+}
+
+func (d *GooglePhoto) getFile(id string) (MediaItem, error) {
+	var resp MediaItem
+
+	query := map[string]string{
+		"fields": "baseUrl,mimeType",
+	}
+	_, err := d.request(fmt.Sprintf("https://photoslibrary.googleapis.com/v1/mediaItems/%s", id), http.MethodGet, func(req *resty.Request) {
+		req.SetQueryParams(query)
+	}, &resp, nil)
+	if err != nil {
+		return resp, err
+	}
+
+	return resp, nil
+}