File size: 4,460 Bytes
7107f0b
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
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

const (
	FETCH_ALL = "all"
	FETCH_ALBUMS = "albums"
	FETCH_ROOT = "root"
	FETCH_SHARE_ALBUMS = "share_albums"
)

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)
	req.SetHeader("Accept-Encoding", "gzip")
	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(id string) ([]MediaItem, error) {
	switch id {
	case FETCH_ALL:
		return d.getAllMedias()
	case FETCH_ALBUMS:
		return d.getAlbums()
	case FETCH_SHARE_ALBUMS:
		return d.getShareAlbums()
	case FETCH_ROOT:
		return d.getFakeRoot()
	default:
		return d.getMedias(id)
	}
}

func (d *GooglePhoto) getFakeRoot() ([]MediaItem, error) {
	return []MediaItem{
		{
			Id: FETCH_ALL,
			Title: "全部媒体",
		},
		{
			Id: FETCH_ALBUMS,
			Title: "全部影集",
		},
		{
			Id: FETCH_SHARE_ALBUMS,
			Title: "共享影集",
		},
	}, nil
}

func (d *GooglePhoto) getAlbums() ([]MediaItem, error) {
	return d.fetchItems(
		"https://photoslibrary.googleapis.com/v1/albums",
		map[string]string{
			"fields":    "albums(id,title,coverPhotoBaseUrl),nextPageToken",
			"pageSize":  "50",
			"pageToken": "first",
		},
		http.MethodGet)
}

func (d *GooglePhoto) getShareAlbums() ([]MediaItem, error) {
	return d.fetchItems(
		"https://photoslibrary.googleapis.com/v1/sharedAlbums",
		map[string]string{
			"fields":    "sharedAlbums(id,title,coverPhotoBaseUrl),nextPageToken",
			"pageSize":  "50",
			"pageToken": "first",
		},
		http.MethodGet)
}

func (d *GooglePhoto) getMedias(albumId string) ([]MediaItem, error) {
	return d.fetchItems(
		"https://photoslibrary.googleapis.com/v1/mediaItems:search",
		map[string]string{
			"fields":    "mediaItems(id,baseUrl,mimeType,mediaMetadata,filename),nextPageToken",
			"pageSize":  "100",
			"albumId": albumId,
			"pageToken": "first",
		}, http.MethodPost)
}

func (d *GooglePhoto) getAllMedias() ([]MediaItem, error) {
	return d.fetchItems(
		"https://photoslibrary.googleapis.com/v1/mediaItems",
		map[string]string{
			"fields":    "mediaItems(id,baseUrl,mimeType,mediaMetadata,filename),nextPageToken",
			"pageSize":  "100",
			"pageToken": "first",
		},
		http.MethodGet)
}

func (d *GooglePhoto) getMedia(id string) (MediaItem, error) {
	var resp MediaItem

	query := map[string]string{
		"fields": "mediaMetadata,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
}

func (d *GooglePhoto) fetchItems(url string, query map[string]string, method string) ([]MediaItem, error){
	res := make([]MediaItem, 0)
	for query["pageToken"] != "" {
		if query["pageToken"] == "first" {
			query["pageToken"] = ""
		}
		var resp Items

		_, err := d.request(url, method, func(req *resty.Request) {
			req.SetQueryParams(query)
		}, &resp, nil)
		if err != nil {
			return nil, err
		}
		query["pageToken"] = resp.NextPageToken
		res = append(res, resp.MediaItems...)
		res = append(res, resp.Albums...)
		res = append(res, resp.SharedAlbums...)
	}
	return res, nil
}