summaryrefslogtreecommitdiff
path: root/importer.go
blob: 94065f6bc0f543fdbf409062db6725faefba77de (plain)
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
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
//
//  rhimportd
//
//  The Radio Helsinki Rivendell Import Daemon
//
//
//  Copyright (C) 2015 Christian Pointner <equinox@helsinki.at>
//
//  This file is part of rhimportd.
//
//  rhimportd is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  any later version.
//
//  rhimportd is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with rhimportd. If not, see <http://www.gnu.org/licenses/>.
//

package rhimport

import (
	"bufio"
	"bytes"
	"fmt"
	"github.com/golang-basic/go-curl"
	"mime/multipart"
	"net/http"
	"os"
	"path"
)

var (
	bool2str = map[bool]string{false: "0", true: "1"}
)

type ImportContext struct {
	*Config
	*RdDb
	UserName             string
	Password             string
	Trusted              bool
	ShowId               uint
	ClearShowCarts       bool
	GroupName            string
	Cart                 uint
	ClearCart            bool
	Cut                  uint
	Channels             uint
	NormalizationLevel   int
	AutotrimLevel        int
	UseMetaData          bool
	SourceUri            string
	SourceFile           string
	DeleteSourceFile     bool
	DeleteSourceDir      bool
	ProgressCallBack     func(step int, step_name string, progress float64, userdata interface{})
	ProgressCallBackData interface{}
}

func NewImportContext(conf *Config, rddb *RdDb, user string) *ImportContext {
	ctx := new(ImportContext)
	ctx.Config = conf
	ctx.RdDb = rddb
	ctx.UserName = user
	ctx.Password = ""
	ctx.Trusted = false
	ctx.ShowId = 0
	ctx.ClearShowCarts = false
	ctx.GroupName = ""
	ctx.Cart = 0
	ctx.ClearCart = false
	ctx.Cut = 0
	ctx.Channels = conf.ImportParamDefaults.Channels
	ctx.NormalizationLevel = conf.ImportParamDefaults.NormalizationLevel
	ctx.AutotrimLevel = conf.ImportParamDefaults.AutotrimLevel
	ctx.UseMetaData = conf.ImportParamDefaults.UseMetaData
	ctx.SourceFile = ""
	ctx.DeleteSourceFile = false
	ctx.DeleteSourceDir = false
	ctx.ProgressCallBack = nil

	return ctx
}

func (ctx *ImportContext) SanityCheck() error {
	if ctx.UserName == "" {
		return fmt.Errorf("empty Username is not allowed")
	}
	if ctx.Password == "" && !ctx.Trusted {
		return fmt.Errorf("empty Password on untrusted control interface is not allowed")
	}
	if ctx.ShowId != 0 {
		return nil
	}
	if ctx.GroupName != "" {
		ismusic, err := ctx.checkMusicGroup()
		if err != nil {
			return err
		}
		if !ismusic {
			return fmt.Errorf("supplied GroupName is not a music pool")
		}
		return nil
	}
	if ctx.Cart == 0 {
		return fmt.Errorf("either ShowId, PoolName or CartNumber must be supplied")
	}
	if ctx.Channels != 1 && ctx.Channels != 2 {
		return fmt.Errorf("channles must be 1 or 2")
	}
	return nil
}

func (ctx *ImportContext) getPassword(cached bool) (err error) {
	req := getPasswordRequest{}
	req.username = ctx.UserName
	req.cached = cached
	req.response = make(chan getPasswordResult)
	ctx.RdDb.getPasswordChan <- req

	res := <-req.response
	if res.err != nil {
		return res.err
	}
	ctx.Password = res.password
	return nil
}

func (ctx *ImportContext) getGroupOfCart() error {
	req := getGroupOfCartRequest{}
	req.cart = ctx.Cart
	req.response = make(chan getGroupOfCartResult)
	ctx.RdDb.getGroupOfCartChan <- req

	res := <-req.response
	if res.err != nil {
		return res.err
	}
	ctx.GroupName = res.group
	return nil
}

func (ctx *ImportContext) getShowInfo() (carts []uint, err error) {
	req := getShowInfoRequest{}
	req.showid = ctx.ShowId
	req.response = make(chan getShowInfoResult)
	ctx.RdDb.getShowInfoChan <- req

	res := <-req.response
	if res.err != nil {
		err = res.err
		return
	}
	ctx.GroupName = res.group
	ctx.NormalizationLevel = res.norm_lvl
	ctx.AutotrimLevel = res.trim_lvl
	ctx.Channels = 2
	ctx.UseMetaData = true
	carts = res.carts
	return
}

func (ctx *ImportContext) checkMusicGroup() (bool, error) {
	req := checkMusicGroupRequest{}
	req.group = ctx.GroupName
	req.response = make(chan checkMusicGroupResult)
	ctx.RdDb.checkMusicGroupChan <- req

	res := <-req.response
	if res.err != nil {
		return false, res.err
	}
	return res.ismusic, nil
}

func (ctx *ImportContext) getMusicInfo() (err error) {
	req := getMusicInfoRequest{}
	req.group = ctx.GroupName
	req.response = make(chan getMusicInfoResult)
	ctx.RdDb.getMusicInfoChan <- req

	res := <-req.response
	if res.err != nil {
		return res.err
	}
	ctx.NormalizationLevel = res.norm_lvl
	ctx.AutotrimLevel = res.trim_lvl
	ctx.Channels = 2
	ctx.UseMetaData = true
	return
}

type ImportResult struct {
	ResponseCode int
	ErrorString  string
	Cart         uint
	Cut          uint
}

func (self *ImportResult) fromRDWebResult(rdres *RDWebResult) {
	self.ResponseCode = rdres.ResponseCode
	self.ErrorString = rdres.ErrorString
	if rdres.AudioConvertError != 0 {
		self.ErrorString += fmt.Sprintf(", Audio Convert Error: %d", rdres.AudioConvertError)
	}
}

func add_cart(ctx *ImportContext, res *ImportResult) (err error) {
	rhdl.Printf("importer: add_cart() called for cart: %d", ctx.Cart)

	if ctx.GroupName == "" {
		if err = ctx.getGroupOfCart(); err != nil {
			return
		}
	}

	var b bytes.Buffer
	w := multipart.NewWriter(&b)

	if err = w.WriteField("COMMAND", "12"); err != nil {
		return
	}
	if err = w.WriteField("LOGIN_NAME", ctx.UserName); err != nil {
		return
	}
	if err = w.WriteField("PASSWORD", ctx.Password); err != nil {
		return
	}
	if err = w.WriteField("GROUP_NAME", ctx.GroupName); err != nil {
		return
	}
	if err = w.WriteField("TYPE", "audio"); err != nil {
		return
	}
	if ctx.Cart != 0 {
		if err = w.WriteField("CART_NUMBER", fmt.Sprintf("%d", ctx.Cart)); err != nil {
			return
		}
	}
	w.Close()

	var resp *http.Response
	if resp, err = send_post_request(ctx.Config.RDXportEndpoint, &b, w.FormDataContentType()); err != nil {
		return
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		var rdres *RDWebResult
		if rdres, err = NewRDWebResultFromXML(resp.Body); err != nil {
			return
		}
		res.fromRDWebResult(rdres)
		res.Cart = ctx.Cart
		return
	}
	var cartadd *RDCartAdd
	if cartadd, err = NewRDCartAddFromXML(resp.Body); err != nil {
		return
	}
	res.ResponseCode = resp.StatusCode
	res.ErrorString = "OK"
	res.Cart = cartadd.Carts[0].Number
	ctx.Cart = res.Cart
	return
}

func add_cut(ctx *ImportContext, res *ImportResult) (err error) {
	rhdl.Printf("importer: add_cut() called for cart/cut: %d/%d", ctx.Cart, ctx.Cut)
	var b bytes.Buffer
	w := multipart.NewWriter(&b)

	if err = w.WriteField("COMMAND", "10"); err != nil {
		return
	}
	if err = w.WriteField("LOGIN_NAME", ctx.UserName); err != nil {
		return
	}
	if err = w.WriteField("PASSWORD", ctx.Password); err != nil {
		return
	}
	if err = w.WriteField("CART_NUMBER", fmt.Sprintf("%d", ctx.Cart)); err != nil {
		return
	}
	w.Close()

	var resp *http.Response
	if resp, err = send_post_request(ctx.Config.RDXportEndpoint, &b, w.FormDataContentType()); err != nil {
		return
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		var rdres *RDWebResult
		if rdres, err = NewRDWebResultFromXML(resp.Body); err != nil {
			return
		}
		res.fromRDWebResult(rdres)
		res.Cart = ctx.Cart
		res.Cut = ctx.Cut
		return
	}
	var cutadd *RDCutAdd
	if cutadd, err = NewRDCutAddFromXML(resp.Body); err != nil {
		return
	}
	res.ResponseCode = resp.StatusCode
	res.ErrorString = "OK"
	res.Cart = ctx.Cart
	res.Cut = cutadd.Cuts[0].Number
	ctx.Cut = cutadd.Cuts[0].Number
	return
}

func remove_cart(ctx *ImportContext, res *ImportResult) (err error) {
	rhdl.Printf("importer: remove_cart() called for cart: %d", ctx.Cart)
	var b bytes.Buffer
	w := multipart.NewWriter(&b)

	if err = w.WriteField("COMMAND", "13"); err != nil {
		return
	}
	if err = w.WriteField("LOGIN_NAME", ctx.UserName); err != nil {
		return
	}
	if err = w.WriteField("PASSWORD", ctx.Password); err != nil {
		return
	}
	if err = w.WriteField("CART_NUMBER", fmt.Sprintf("%d", ctx.Cart)); err != nil {
		return
	}
	w.Close()

	var resp *http.Response
	if resp, err = send_post_request(ctx.Config.RDXportEndpoint, &b, w.FormDataContentType()); err != nil {
		return
	}
	defer resp.Body.Close()

	var rdres *RDWebResult
	if rdres, err = NewRDWebResultFromXML(resp.Body); err != nil {
		return
	}
	res.fromRDWebResult(rdres)
	res.Cart = ctx.Cart
	return
}

func remove_cut(ctx *ImportContext, res *ImportResult) (err error) {
	rhdl.Printf("importer: remove_cut() called for cart/cut: %d/%d", ctx.Cart, ctx.Cut)
	var b bytes.Buffer
	w := multipart.NewWriter(&b)

	if err = w.WriteField("COMMAND", "11"); err != nil {
		return
	}
	if err = w.WriteField("LOGIN_NAME", ctx.UserName); err != nil {
		return
	}
	if err = w.WriteField("PASSWORD", ctx.Password); err != nil {
		return
	}
	if err = w.WriteField("CART_NUMBER", fmt.Sprintf("%d", ctx.Cart)); err != nil {
		return
	}
	if err = w.WriteField("CUT_NUMBER", fmt.Sprintf("%d", ctx.Cut)); err != nil {
		return
	}
	w.Close()

	var resp *http.Response
	if resp, err = send_post_request(ctx.Config.RDXportEndpoint, &b, w.FormDataContentType()); err != nil {
		return
	}
	defer resp.Body.Close()

	var rdres *RDWebResult
	if rdres, err = NewRDWebResultFromXML(resp.Body); err != nil {
		return
	}
	res.fromRDWebResult(rdres)
	res.Cart = ctx.Cart
	res.Cut = ctx.Cut
	return
}

func send_post_request(url string, b *bytes.Buffer, contenttype string) (resp *http.Response, err error) {
	var req *http.Request
	if req, err = http.NewRequest("POST", url, b); err != nil {
		return
	}
	if contenttype != "" {
		req.Header.Set("Content-Type", contenttype)
	}

	client := &http.Client{}
	if resp, err = client.Do(req); err != nil {
		return
	}
	return
}

func import_audio_create_request(ctx *ImportContext, easy *curl.CURL) (form *curl.Form, err error) {
	form = curl.NewForm()

	if err = form.Add("COMMAND", "2"); err != nil {
		return
	}
	if err = form.Add("LOGIN_NAME", ctx.UserName); err != nil {
		return
	}
	if err = form.Add("PASSWORD", ctx.Password); err != nil {
		return
	}
	if err = form.Add("CART_NUMBER", fmt.Sprintf("%d", ctx.Cart)); err != nil {
		return
	}
	if err = form.Add("CUT_NUMBER", fmt.Sprintf("%d", ctx.Cut)); err != nil {
		return
	}
	if err = form.Add("CHANNELS", fmt.Sprintf("%d", ctx.Channels)); err != nil {
		return
	}
	if err = form.Add("NORMALIZATION_LEVEL", fmt.Sprintf("%d", ctx.NormalizationLevel)); err != nil {
		return
	}
	if err = form.Add("AUTOTRIM_LEVEL", fmt.Sprintf("%d", ctx.AutotrimLevel)); err != nil {
		return
	}
	if err = form.Add("USE_METADATA", bool2str[ctx.UseMetaData]); err != nil {
		return
	}
	if err = form.AddFile("FILENAME", ctx.SourceFile); err != nil {
		return
	}

	return
}

func import_audio(ctx *ImportContext, res *ImportResult) (err error) {
	rhdl.Printf("importer: import_audio() called for cart/cut: %d/%d", ctx.Cart, ctx.Cut)
	easy := curl.EasyInit()

	if easy != nil {
		defer easy.Cleanup()

		easy.Setopt(curl.OPT_URL, ctx.Config.RDXportEndpoint)
		easy.Setopt(curl.OPT_POST, true)

		var form *curl.Form
		if form, err = import_audio_create_request(ctx, easy); err != nil {
			return
		}
		easy.Setopt(curl.OPT_HTTPPOST, form)
		easy.Setopt(curl.OPT_HTTPHEADER, []string{"Expect:"})

		var resbody bytes.Buffer
		easy.Setopt(curl.OPT_WRITEFUNCTION, func(ptr []byte, userdata interface{}) bool {
			b := userdata.(*bytes.Buffer)
			b.Write(ptr)
			return true
		})
		easy.Setopt(curl.OPT_WRITEDATA, &resbody)

		easy.Setopt(curl.OPT_NOPROGRESS, false)
		easy.Setopt(curl.OPT_PROGRESSFUNCTION, func(dltotal, dlnow, ultotal, ulnow float64, userdata interface{}) bool {
			ctx := userdata.(*ImportContext)
			if ctx.ProgressCallBack != nil {
				ctx.ProgressCallBack(2, "importing", ulnow/ultotal, ctx.ProgressCallBackData)
			}
			return true
		})
		easy.Setopt(curl.OPT_PROGRESSDATA, ctx)

		if err = easy.Perform(); err != nil {
			err = fmt.Errorf("importer: %s", err)
			return
		}

		var rdres *RDWebResult
		if rdres, err = NewRDWebResultFromXML(bufio.NewReader(&resbody)); err != nil {
			return
		}
		res.fromRDWebResult(rdres)
		res.Cart = ctx.Cart
		res.Cut = ctx.Cut
	} else {
		err = fmt.Errorf("Error initializing libcurl")
	}

	return
}

func add_cart_cut(ctx *ImportContext, res *ImportResult) (err error) {
	if err = add_cart(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
		return
	}
	if err = add_cut(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
		return remove_cart(ctx, &ImportResult{ResponseCode: http.StatusOK})
	}
	return
}

func remove_add_cart_cut(ctx *ImportContext, res *ImportResult) (err error) {
	if err = remove_cart(ctx, res); err != nil || (res.ResponseCode != http.StatusOK && res.ResponseCode != http.StatusNotFound) {
		return
	}
	return add_cart_cut(ctx, res)
}

func is_cart_member_of_show(ctx *ImportContext, res *ImportResult, carts []uint) (found bool) {
	if ctx.Cart == 0 {
		return true
	}
	for _, cart := range carts {
		if cart == ctx.Cart {
			return true
		}
	}
	res.ResponseCode = http.StatusBadRequest
	res.ErrorString = fmt.Sprintf("Requested cart %d is not a member of show: %d", ctx.Cart, ctx.ShowId)
	return false
}

func clear_show_carts(ctx *ImportContext, res *ImportResult, carts []uint) (err error) {
	if ctx.ClearShowCarts {
		orig_cart := ctx.Cart
		for _, cart := range carts {
			ctx.Cart = cart
			if err = remove_cart(ctx, res); err != nil || (res.ResponseCode != http.StatusOK && res.ResponseCode != http.StatusNotFound) {
				return
			}
		}
		ctx.Cart = orig_cart
	}
	return
}

func add_show_cart_cut(ctx *ImportContext, res *ImportResult, carts []uint) (err error) {
	if err = add_cart(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
		return
	}
	for _, cart := range carts {
		if cart == ctx.Cart {
			if err = add_cut(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
				return remove_cart(ctx, &ImportResult{ResponseCode: http.StatusOK})
			}
			return
		}
	}
	if err = remove_cart(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
		return
	}
	res.ResponseCode = http.StatusForbidden
	res.ErrorString = fmt.Sprintf("Show %d has no free carts left", ctx.ShowId)
	return
}

func cleanup_files(ctx *ImportContext) {
	if ctx.DeleteSourceFile {
		rhdl.Printf("importer: removing file: %s", ctx.SourceFile)
		if err := os.Remove(ctx.SourceFile); err != nil {
			rhl.Printf("importer: error removing source file: %s", err)
			return
		}
		if ctx.DeleteSourceDir {
			dir := path.Dir(ctx.SourceFile)
			rhdl.Printf("importer: also removing directory: %s", dir)
			if err := os.Remove(dir); err != nil {
				rhl.Printf("importer: error removing source directory: %s", err)
			}
		}
	}
	return
}

func ImportFile(ctx *ImportContext) (res *ImportResult, err error) {
	defer cleanup_files(ctx)

	rhdl.Printf("importer: ImportFile called with: show-id: %d, pool-name: '%s', cart/cut: %d/%d", ctx.ShowId, ctx.GroupName, ctx.Cart, ctx.Cut)

	if ctx.ProgressCallBack != nil {
		ctx.ProgressCallBack(2, "importing", 0.0, ctx.ProgressCallBackData)
	}

	if ctx.Trusted {
		if err = ctx.getPassword(true); err != nil {
			return
		}
	}

	rmCartOnErr := false
	rmCutOnErr := false
	res = &ImportResult{ResponseCode: http.StatusOK}
	if ctx.ShowId != 0 {
		var show_carts []uint
		if show_carts, err = ctx.getShowInfo(); err != nil {
			return
		}
		if !is_cart_member_of_show(ctx, res, show_carts) {
			return
		}
		if err = clear_show_carts(ctx, res, show_carts); err != nil || (res.ResponseCode != http.StatusOK && res.ResponseCode != http.StatusNotFound) {
			return
		}
		if err = add_show_cart_cut(ctx, res, show_carts); err != nil || res.ResponseCode != http.StatusOK {
			return
		}
		rmCartOnErr = true
	} else if ctx.GroupName != "" {
		if err = ctx.getMusicInfo(); err != nil {
			return
		}
		if err = remove_add_cart_cut(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
			return
		}
		rmCartOnErr = true
	} else if ctx.Cart != 0 && ctx.Cut == 0 {
		if ctx.ClearCart {
			if err = remove_add_cart_cut(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
				return
			}
			rmCartOnErr = true
		} else {
			if err = add_cut(ctx, res); err != nil {
				return
			}
			if res.ResponseCode != http.StatusOK {
				if err = add_cart_cut(ctx, res); err != nil || res.ResponseCode != http.StatusOK {
					return
				}
				rmCartOnErr = true
			} else {
				rmCutOnErr = true
			}
		}
	}

	if ctx.Cart != 0 && ctx.Cut != 0 {
		if err = import_audio(ctx, res); err != nil {
			return
		}
		if res.ResponseCode != http.StatusOK {
			rmres := ImportResult{ResponseCode: http.StatusOK}
			if rmCartOnErr {
				if err = remove_cart(ctx, &rmres); err != nil {
					return
				}
			} else if rmCutOnErr {
				if err = remove_cut(ctx, &rmres); err != nil {
					return
				}
			}
		}
	} else {
		res.ResponseCode = http.StatusBadRequest
		res.ErrorString = "The request doesn't contain enough information to be processed"
	}

	return
}