/
graph.go
316 lines (301 loc) · 8.78 KB
/
graph.go
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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
// Copyright 2022, 2023 Tamás Gulácsi. All rights reserved.
//
// SPDX-License-Identifier: Apache-2.0
package o365
import (
"context"
"encoding/json"
"fmt"
"io"
"log/slog"
"net/textproto"
"strconv"
"strings"
"sync/atomic"
"time"
"github.com/tgulacsi/imapclient/graph"
"github.com/tgulacsi/imapclient/v2"
"github.com/hashicorp/go-azure-sdk/sdk/odata"
)
type graphMailClient struct {
graph.GraphMailClient `json:"-"`
userID string
folders map[string]graph.Folder
u2s map[uint32]string
s2u map[string]uint32
logger *slog.Logger
seq uint32
}
func NewGraphMailClient(ctx context.Context, clientID, clientSecret, tenantID, userID string) (*graphMailClient, error) {
gmc, err := graph.NewGraphMailClient(ctx, tenantID, clientID, clientSecret)
if err != nil {
return nil, err
}
logger := slog.Default()
if strings.IndexByte(userID, '@') >= 0 {
users, err := gmc.Users(ctx)
if err != nil {
return nil, err
}
var found bool
for _, u := range users {
logger.Debug("users", "name", u.DisplayName, "mail", u.Mail)
if u.Mail != nil && string(*u.Mail) == userID {
userID, found = *u.ID(), true
break
}
}
if !found {
return nil, fmt.Errorf("no user found with %q mail address", userID)
}
}
logger.Debug("NewGraphMailClient", "userID", userID)
return &graphMailClient{
GraphMailClient: gmc, userID: userID,
logger: logger,
}, nil
}
var _ imapclient.Client = (*graphMailClient)(nil)
func (g *graphMailClient) init(ctx context.Context, mbox string) error {
if g.u2s == nil {
g.u2s = make(map[uint32]string)
g.s2u = make(map[string]uint32)
}
if g.folders == nil {
g.folders = make(map[string]graph.Folder)
if folders, err := g.GraphMailClient.ListMailFolders(ctx, g.userID, odata.Query{}); err != nil && len(folders) == 0 {
return err
} else {
for _, f := range folders {
g.folders[strings.ToLower(f.DisplayName)] = f
g.folders["{"+f.ID+"}"] = f
}
}
}
if mbox == "" {
return nil
}
if i := strings.IndexByte(mbox, '/'); i >= 0 {
mbox = mbox[:i]
}
mbox = strings.ToLower(mbox)
fID, err := g.m2s(mbox)
if err != nil {
return err
}
folders, err := g.GraphMailClient.ListChildFolders(ctx, g.userID, fID, true, odata.Query{})
if err != nil {
g.logger.Error("ListChildFolders", "userID", g.userID, "folder", fID, "folders", folders, "error", err)
if len(folders) == 0 {
return err
}
}
for _, f := range folders {
g.folders["{"+f.ID+"}"] = f
}
var path []string
for _, f := range folders {
var prefix string
path = path[:0]
if f.ParentFolderID != "" {
for p := g.folders["{"+f.ParentFolderID+"}"]; p.ParentFolderID != ""; p = g.folders["{"+p.ParentFolderID+"}"] {
path = append(path, strings.ToLower(p.DisplayName))
}
if len(path) != 0 {
// reverse
for i, j := 0, len(path)-1; i < j; i, j = i+1, j-1 {
path[i], path[j] = path[j], path[i]
}
prefix = strings.Join(path, "/") + "/"
}
}
g.folders[prefix+strings.ToLower(f.DisplayName)] = f
}
if err != nil {
g.logger.Error("MailFolders.Get", "userID", g.userID, "folder", fID, "error", err)
return fmt.Errorf("MailFolders.Get(%q): %w", g.userID, err)
}
// https://www.c-sharpcorner.com/article/read-email-from-mailbox-folders-using-microsoft-graph-api/
return nil
}
func (g *graphMailClient) SetLogger(lgr *slog.Logger) { g.logger = lgr }
func (g *graphMailClient) SetLogMask(imapclient.LogMask) imapclient.LogMask { return false }
func (g *graphMailClient) Close(ctx context.Context, commit bool) error { return ErrNotSupported }
func (g *graphMailClient) Mailboxes(ctx context.Context, root string) ([]string, error) {
if err := g.init(ctx, root); err != nil {
return nil, err
}
folders := make([]string, 0, len(g.folders))
for k := range g.folders {
if !(len(k) > 2 && k[0] == '{' && k[len(k)-1] == '}') {
folders = append(folders, k)
}
}
return folders, nil
}
func (g *graphMailClient) FetchArgs(ctx context.Context, what string, msgIDs ...uint32) (map[uint32]map[string][]string, error) {
m := make(map[uint32]map[string][]string, len(msgIDs))
var wantMIME bool
for _, f := range strings.Fields(what) {
wantMIME = wantMIME || f == "RFC822.HEADER" || f == "RFC822.SIZE" || f == "RFC822.BODY"
}
var firstErr error
for _, mID := range msgIDs {
s := g.u2s[mID]
if wantMIME {
var buf strings.Builder
size, err := g.GraphMailClient.GetMIMEMessage(ctx, &buf, g.userID, s)
if err != nil {
return m, fmt.Errorf("GetMIMEMessage(%q): %w", s, err)
}
s := buf.String()
i := strings.Index(s, "\r\n\r\n")
m[mID] = map[string][]string{
"RFC822.HEADER": []string{s[:i+4]},
"RFC822.BODY": []string{s[i+4:]},
"RFC822.SIZE": []string{strconv.FormatInt(size, 10)},
}
} else {
hdrs, err := g.GraphMailClient.GetMessageHeaders(ctx, g.userID, s, odata.Query{})
if err != nil {
g.logger.Error("GetMessageHeaders", "msgID", s, "error", err)
if firstErr == nil {
firstErr = err
}
continue
}
m[mID] = hdrs
if strings.Contains(what, "RFC822.SIZE") {
m[mID]["RFC822.SIZE"] = []string{"0"}
}
if strings.Contains(what, "RFC822.HEADER") {
var buf strings.Builder
for k, vv := range hdrs {
k = textproto.CanonicalMIMEHeaderKey(k)
for _, v := range vv {
buf.WriteString(k)
buf.WriteString(":\t")
buf.WriteString(v)
buf.WriteString("\r\n")
}
}
buf.WriteString("\r\n")
m[mID]["RFC822.HEADER"] = []string{buf.String()}
}
}
}
if len(m) == 0 {
return nil, firstErr
}
return m, nil
}
func (g *graphMailClient) Peek(ctx context.Context, w io.Writer, msgID uint32, what string) (int64, error) {
return 0, ErrNotImplemented
}
func (g *graphMailClient) Delete(ctx context.Context, msgID uint32) error {
if err := g.init(ctx, ""); err != nil {
return err
}
mID, err := g.m2s("deleted items")
if err != nil {
return err
}
_, err = g.GraphMailClient.MoveMessage(ctx, g.userID, g.u2s[msgID], mID)
return err
}
func (g *graphMailClient) Select(ctx context.Context, mbox string) error {
return nil
}
func (g *graphMailClient) Watch(ctx context.Context) ([]uint32, error) {
return nil, ErrNotSupported
}
func (g *graphMailClient) WriteTo(ctx context.Context, mbox string, msg []byte, date time.Time) error {
return ErrNotImplemented
}
func (g *graphMailClient) Connect(ctx context.Context) error {
return g.init(ctx, "")
}
func (g *graphMailClient) Move(ctx context.Context, msgID uint32, mbox string) error {
if err := g.init(ctx, mbox); err != nil {
return err
}
mID, err := g.m2s(mbox)
if err != nil {
return nil
}
_, err = g.GraphMailClient.MoveMessage(ctx, g.userID, g.u2s[msgID], mID)
return err
}
func (g *graphMailClient) Mark(ctx context.Context, msgID uint32, seen bool) error {
var buf strings.Builder
buf.WriteString(`{"isRead":`)
if seen {
buf.WriteString(`true}`)
} else {
buf.WriteString(`false}`)
}
_, err := g.GraphMailClient.UpdateMessage(ctx, g.userID, g.u2s[msgID], json.RawMessage(buf.String()))
return err
}
func (g *graphMailClient) m2s(mbox string) (string, error) {
mbox = strings.ToLower(mbox)
if mf, ok := g.folders[mbox]; ok {
return mf.ID, nil
}
if mf, ok := g.folders["{"+mbox+"}"]; ok {
return mf.ID, nil
}
for k, mf := range g.folders {
if len(k) > 2 && k[0] == '{' && k[len(k)-1] == '}' {
continue
}
if nm := mf.DisplayName; strings.EqualFold(nm, mbox) || (mbox == "inbox" && nm == "beérkezett üzenetek") {
return mf.ID, nil
}
}
folders := make([]string, 0, len(g.folders))
for k := range g.folders {
if !(len(k) > 2 && k[0] == '{' && k[len(k)-1] == '}') {
folders = append(folders, k)
}
}
return "", fmt.Errorf("mbox %q not found (have: %+v)", mbox, folders)
}
func (g *graphMailClient) List(ctx context.Context, mbox, pattern string, all bool) ([]uint32, error) {
if err := g.init(ctx, mbox); err != nil {
g.logger.Error("init", "mbox", mbox, "error", err)
return nil, err
}
mID, err := g.m2s(mbox)
if err != nil {
g.logger.Error("m2s", "mbox", mbox, "error", err)
return nil, err
}
query := odata.Query{Filter: "isRead eq false"}
if pattern != "" {
query.Filter += " and contains(subject, " + strings.ReplaceAll(strconv.Quote(pattern), `"`, "'") + ")"
}
msgs, err := g.GraphMailClient.ListMessages(ctx, g.userID, mID, query)
if err != nil {
g.logger.Error("folder", "id", mID, "name", mbox, "query", query, "error", err)
return nil, err
}
g.logger.Debug("folder", "id", mID, "name", mbox, "query", query, "msgs", len(msgs))
if len(msgs) == 0 {
return nil, nil
}
ids := make([]uint32, 0, len(msgs))
for _, m := range msgs {
s := m.ID
u, ok := g.s2u[s]
if !ok {
u = atomic.AddUint32(&g.seq, 1)
g.u2s[u] = s
}
ids = append(ids, u)
}
return ids, nil
}
func (g *graphMailClient) ReadTo(ctx context.Context, w io.Writer, msgID uint32) (int64, error) {
return g.GraphMailClient.GetMIMEMessage(ctx, w, g.userID, g.u2s[msgID])
}