-
Notifications
You must be signed in to change notification settings - Fork 0
/
gocal.go
494 lines (456 loc) · 13.7 KB
/
gocal.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
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"os/user"
"path/filepath"
"time"
"github.com/buger/goterm"
calUtil "github.com/carlso70/gocalendar/calendarutils"
"github.com/kroppt/climenu"
"golang.org/x/net/context"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/api/calendar/v3"
)
// getClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
var err error
var cacheFile string
if cacheFile, err = tokenCacheFile(); err != nil {
log.Fatalf("Unable to get path to cached credential file. %v", err)
}
var tok *oauth2.Token
if tok, err = tokenFromFile(cacheFile); err != nil {
tok = getTokenFromWeb(config)
saveToken(cacheFile, tok)
}
return config.Client(ctx, tok)
}
// getTokenFromWeb uses Config to request a Token.
// It returns the retrieved Token.
func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
var tok *oauth2.Token
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
fmt.Printf("Go to the following link in your browser then type the "+
"authorization code: \n%v\n", authURL)
var err error
var code string
if _, err = fmt.Scan(&code); err != nil {
log.Fatalf("Unable to read authorization code %v", err)
}
if tok, err = config.Exchange(oauth2.NoContext, code); err != nil {
log.Fatalf("Unable to retrieve token from web %v", err)
}
return tok
}
// tokenCacheFile generates credential file path/filename.
// It returns the generated credential path/filename.
func tokenCacheFile() (string, error) {
var err error
var usr *user.User
if usr, err = user.Current(); err != nil {
return "", err
}
tokenCacheDir := filepath.Join(usr.HomeDir, ".credentials")
os.MkdirAll(tokenCacheDir, 0700)
return filepath.Join(tokenCacheDir,
url.QueryEscape("gocalendar.json")), err
}
// tokenFromFile retrieves a Token from a given file path.
// It returns the retrieved Token and any read error encountered.
func tokenFromFile(file string) (*oauth2.Token, error) {
var err error
var f *os.File
if f, err = os.Open(file); err != nil {
return nil, err
}
t := &oauth2.Token{}
err = json.NewDecoder(f).Decode(t)
defer f.Close()
return t, err
}
// saveToken uses a file path to create a file and store the
// token in it.
func saveToken(file string, token *oauth2.Token) {
var err error
var f *os.File
fmt.Printf("Saving credential file to: %s\n", file)
if f, err = os.Create(file); err != nil {
log.Fatalf("Unable to cache oauth token: %v", err)
}
defer f.Close()
json.NewEncoder(f).Encode(token)
}
func getCalendarID(srv *calendar.Service) (string, error) {
var cl *calendar.CalendarList
var err error
if cl, err = srv.CalendarList.List().Do(); err != nil {
fmt.Println("Error while fetching available calendars.")
return "", fmt.Errorf("no valid calendars found")
}
IDs := cl.Items
if len(IDs) <= 0 || err != nil {
fmt.Println("No valid calendars found.")
return "", fmt.Errorf("no valid calendars found")
}
calID := IDs[0].Id
if len(IDs) > 1 {
idMenu := climenu.NewButtonMenu("", "Select a calendar")
for _, entry := range IDs {
id := entry.Id
idMenu.AddMenuItem(id, id)
}
esc := false
calID, esc = idMenu.Run()
if esc {
return "", fmt.Errorf("calendar select cancelled")
}
}
return calID, nil
}
func listSeek(srv *calendar.Service, calID string,
action func(srv *calendar.Service, calID string, sel *calendar.Event)) {
var pTok, iniTok string
query := climenu.GetText("Enter search query", "")
var esc error
for esc == nil {
apiCall := srv.Events.List(calID).MaxResults(8).PageToken(pTok).
SingleEvents(true)
events, _ := apiCall.Q(query).Do()
resultMenu := climenu.NewButtonMenu("", "Choose a result")
if len(events.Items) == 0 && pTok == iniTok {
fmt.Println("Failed to find events.")
return
}
for _, foundEvent := range events.Items {
if foundEvent.Summary != "" {
resultMenu.AddMenuItem(foundEvent.Summary, foundEvent.Id)
} else if foundEvent.Description != "" {
resultMenu.AddMenuItem(foundEvent.Description, foundEvent.Id)
} else {
resultMenu.AddMenuItem("id: "+foundEvent.Id, foundEvent.Id)
}
}
if pTok != events.NextPageToken && events.NextPageToken != iniTok {
resultMenu.AddMenuItem("Next page", "nextPage")
} else if events.NextPageToken != pTok && events.NextPageToken == iniTok {
resultMenu.AddMenuItem("Reset page", "nextPage")
}
option, esc := resultMenu.Run()
if esc {
break
}
switch option {
case "nextPage":
pTok = events.NextPageToken
case "cancel":
return
case "":
log.Fatalf("Error selecting option: %v\n", esc)
default:
var sel *calendar.Event
for i, item := range events.Items {
if item.Id == option {
sel = events.Items[i]
break
}
}
action(srv, calID, sel)
return
}
}
}
func getDateTime(timeZone string) (*calendar.EventDateTime, error) {
data := calUtil.NewYmdhmsl()
for data.Year == "" {
data.Year = climenu.GetText("Year", "")
}
data.Month = climenu.GetText("Month", "")
if data.Month != "" {
data.Day = climenu.GetText("Day", "")
}
data.Hour = climenu.GetText("Hour", "all-day")
if data.Hour != "all-day" {
data.Minute = climenu.GetText("Minute", "")
if data.Minute != "" {
data.Second = climenu.GetText("Second", "")
if data.Second != "" {
data.Nsec = climenu.GetText("Nanosecond", "")
}
}
} else {
data.Hour = ""
}
data.Loc = timeZone
res, err := calUtil.ConvertYmdhmsl(data)
return res, err
}
func add(srv *calendar.Service, calID string) {
var err error
calEvent := &calendar.Event{}
calEvent.Summary = climenu.GetText("Enter event summary", "")
calEvent.Location = climenu.GetText("Enter event location", "")
calEvent.Description = climenu.GetText("Enter event description", "")
var cal *calendar.Calendar
if cal, err = srv.Calendars.Get(calID).Do(); err != nil {
log.Fatalf("error while fetching calendar: %v\n", err)
}
timeZone := climenu.GetText("Enter event time zone", cal.TimeZone)
fmt.Printf("%s\n", goterm.Color(goterm.Bold("Enter event start details"),
goterm.GREEN))
if calEvent.Start, err = getDateTime(timeZone); err != nil {
fmt.Println("An error ocurred. Event creation cancelled.")
}
fmt.Printf("%s\n", goterm.Color(goterm.Bold("Enter event end details"),
goterm.GREEN))
if calEvent.End, err = getDateTime(timeZone); err != nil {
fmt.Println("An error ocurred. Event creation cancelled.")
}
if calEvent, err = srv.Events.Insert(calID, calEvent).Do(); err != nil {
fmt.Printf("Unable to create event: %v\n", err)
return
}
fmt.Printf("Event created. Link to event: %s\n", calEvent.HtmlLink)
return
}
func remove(srv *calendar.Service, calID string) {
action := func(srv *calendar.Service, calID string, sel *calendar.Event) {
confirmMenu := climenu.NewButtonMenu("Summary: "+sel.Summary, "Confirm deletion")
confirmMenu.AddMenuItem("Delete", "delete")
confirmMenu.AddMenuItem("Cancel", "cancel")
confirmation, esc := confirmMenu.Run()
if esc {
return
}
switch confirmation {
case "delete":
if err := srv.Events.Delete(calID, sel.Id).Do(); err != nil {
log.Printf("Unable to delete event. %v\n", err)
return
}
fmt.Printf("Event deleted: %s\n", sel.Summary)
return
default:
return
}
}
listSeek(srv, calID, action)
}
func edit(srv *calendar.Service, calID string) {
var err error
action := func(srv *calendar.Service, calID string, sel *calendar.Event) {
editMenu := climenu.NewCheckboxMenu("", "Choose options to edit", "OK", "Cancel")
idList := []string{
"summary",
"loc",
"desc",
"start",
"end",
"zone",
"visibility",
"status",
}
editMenu.AddMenuItem("Summary | "+sel.Summary, idList[0])
editMenu.AddMenuItem("Location | "+sel.Location, idList[1])
editMenu.AddMenuItem("Description | "+sel.Description, idList[2])
if sel.Start.DateTime == "" {
editMenu.AddMenuItem("Start date | "+sel.Start.Date, idList[3])
} else {
editMenu.AddMenuItem("Start time | "+sel.Start.DateTime, idList[3])
}
if sel.End.DateTime == "" {
editMenu.AddMenuItem("End date | "+sel.End.Date, idList[4])
} else {
editMenu.AddMenuItem("End time | "+sel.End.DateTime, idList[4])
}
editMenu.AddMenuItem("Time zone | "+sel.Start.TimeZone, idList[5])
editMenu.AddMenuItem("Visibility | "+sel.Visibility, idList[6])
editMenu.AddMenuItem("Status | "+sel.Status, idList[7])
choices, _ := editMenu.Run()
for _, choice := range choices {
fmt.Println(choice)
switch choice {
case "summary":
sel.Summary = climenu.GetText("Enter new Summary", "")
case "loc":
sel.Location = climenu.GetText("Enter new Location", "")
case "desc":
sel.Description = climenu.GetText("Enter new Description", "")
case "start":
if sel.Start, err = getDateTime(sel.Start.TimeZone); err != nil {
fmt.Println("An error ocurred. Event edit cancelled.")
}
case "end":
if sel.End, err = getDateTime(sel.End.TimeZone); err != nil {
fmt.Println("An error ocurred. Event edit cancelled.")
}
case "zone":
var cal *calendar.Calendar
if cal, err = srv.Calendars.Get(calID).Do(); err != nil {
log.Fatalf("error while fetching calendar: %v\n", err)
}
timeZone := climenu.GetText("Enter new event time zone", cal.TimeZone)
sel.Start.TimeZone = timeZone
sel.End.TimeZone = timeZone
case "visibility":
m := climenu.NewButtonMenu("Current: "+sel.Visibility, "Choose option")
m.AddMenuItem("Default", "default")
m.AddMenuItem("Public (viewable to all readers)", "public")
m.AddMenuItem("Private (viewable to attendees)", "private")
m.AddMenuItem("Cancel", "")
var choice string
var esc bool
choice, esc = m.Run()
if esc || choice == "" {
fmt.Println("No change made.")
return
}
sel.Visibility = choice
case "status":
m := climenu.NewButtonMenu("Current: "+sel.Status, "Choose option")
m.AddMenuItem("Confirmed", "confirmed")
m.AddMenuItem("Tentative (tentatively confirmed)", "tentative")
m.AddMenuItem("Cancelled (i.e. deleted)", "cancelled")
m.AddMenuItem("Cancel", "")
var choice string
var esc bool
choice, esc = m.Run()
if esc || choice == "" {
fmt.Println("No change made.")
return
}
sel.Status = choice
default:
fmt.Println("No changes made.")
return
}
}
var event *calendar.Event
if event, err = srv.Events.Update(calID, sel.Id, sel).Do(); err != nil {
log.Printf("Unable to update event. %s\n", err)
return
}
fmt.Printf("Event updated. Link to event: %s\n", event.HtmlLink)
return
}
listSeek(srv, calID, action)
}
func view(srv *calendar.Service, calID string) {
action := func(srv *calendar.Service, calID string, sel *calendar.Event) {
if sel.Summary != "" {
fmt.Printf("Summary | %s\n", sel.Summary)
}
if sel.Location != "" {
fmt.Printf("Location | %s\n", sel.Location)
}
if sel.Description != "" {
fmt.Printf("Description | %s\n", sel.Description)
}
if sel.Start != nil {
var start string
// If the DateTime is an empty string the Event is an all-day Event.
// So only Date is available.
if sel.Start.DateTime != "" {
start = sel.Start.DateTime
} else {
start = sel.Start.Date
}
fmt.Printf("Start | %s\n", start)
}
if sel.End != nil {
var end string
// If the DateTime is an empty string the Event is an all-day Event.
// So only Date is available.
if sel.End.DateTime != "" {
end = sel.End.DateTime
} else {
end = sel.End.Date
}
fmt.Printf("End | %s\n", end)
}
if sel.Visibility != "" {
fmt.Printf("Visibility | %s\n", sel.Visibility)
}
if sel.Status != "" {
fmt.Printf("Status | %s\n", sel.Status)
}
fmt.Printf("Link to event: %s\n", sel.HtmlLink)
return
}
listSeek(srv, calID, action)
}
func main() {
ctx := context.Background()
var err error
var secretPath = os.Getenv("GOPATH") +
"/src/github.com/carlso70/gocalendar/client_secret.json"
var b []byte
if b, err = ioutil.ReadFile(secretPath); err != nil {
log.Fatalf("Unable to read client secret file: %v", err)
}
var config *oauth2.Config
config, err = google.ConfigFromJSON(b, calendar.CalendarScope)
if err != nil {
log.Fatalf("Unable to parse client secret file to config: %v", err)
}
client := getClient(ctx, config)
var srv *calendar.Service
if srv, err = calendar.New(client); err != nil {
log.Fatalf("Unable to retrieve calendar Client %v", err)
}
var calID string
if calID, err = getCalendarID(srv); err != nil {
return
}
t := time.Now().Format(time.RFC3339)
events, err := srv.Events.List(calID).ShowDeleted(false).
SingleEvents(true).TimeMin(t).MaxResults(10).OrderBy("startTime").Do()
if err != nil {
log.Fatalf("Unable to retrieve next ten of the user's events. %v", err)
}
if len(events.Items) > 0 {
fmt.Println("Upcoming events:")
for _, i := range events.Items {
var when string
// If the DateTime is an empty string the Event is an all-day Event.
// So only Date is available.
if i.Start.DateTime != "" {
when = i.Start.DateTime
} else {
when = i.Start.Date
}
fmt.Printf("%s (%s)\n", i.Summary, when)
}
fmt.Println()
} else {
fmt.Printf("No upcoming events found.\n")
}
for {
cmdMenu := climenu.NewButtonMenu("", "Select a command")
cmdMenu.AddMenuItem("Add new calendar entry", "add")
cmdMenu.AddMenuItem("Remove an existing calendar entry", "remove")
cmdMenu.AddMenuItem("Edit an existing calendar entry", "edit")
cmdMenu.AddMenuItem("View an existing calendar entry", "view")
cmdMenu.AddMenuItem("Exit", "exit")
id, _ := cmdMenu.Run()
switch id {
case "add":
add(srv, calID)
case "remove":
remove(srv, calID)
case "edit":
edit(srv, calID)
case "view":
view(srv, calID)
default:
os.Exit(0)
}
}
}