1//
  2// Copyright (c) 2019 Ted Unangst <tedu@tedunangst.com>
  3//
  4// Permission to use, copy, modify, and distribute this software for any
  5// purpose with or without fee is hereby granted, provided that the above
  6// copyright notice and this permission notice appear in all copies.
  7//
  8// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15
 16package main
 17
 18import (
 19	"bytes"
 20	"compress/gzip"
 21	"crypto/rsa"
 22	"database/sql"
 23	"fmt"
 24	"io"
 25	"log"
 26	"net/http"
 27	"net/url"
 28	"os"
 29	"regexp"
 30	"strings"
 31	"sync"
 32	"time"
 33
 34	"humungus.tedunangst.com/r/webs/image"
 35	"humungus.tedunangst.com/r/webs/junk"
 36)
 37
 38var theonetruename = `application/ld+json; profile="https://www.w3.org/ns/activitystreams"`
 39var thefakename = `application/activity+json`
 40var falsenames = []string{
 41	`application/ld+json`,
 42	`application/activity+json`,
 43}
 44var itiswhatitis = "https://www.w3.org/ns/activitystreams"
 45var thewholeworld = "https://www.w3.org/ns/activitystreams#Public"
 46
 47func friendorfoe(ct string) bool {
 48	ct = strings.ToLower(ct)
 49	for _, at := range falsenames {
 50		if strings.HasPrefix(ct, at) {
 51			return true
 52		}
 53	}
 54	return false
 55}
 56
 57func PostJunk(keyname string, key *rsa.PrivateKey, url string, j junk.Junk) error {
 58	var buf bytes.Buffer
 59	j.Write(&buf)
 60	return PostMsg(keyname, key, url, buf.Bytes())
 61}
 62
 63func PostMsg(keyname string, key *rsa.PrivateKey, url string, msg []byte) error {
 64	client := http.DefaultClient
 65	req, err := http.NewRequest("POST", url, bytes.NewReader(msg))
 66	if err != nil {
 67		return err
 68	}
 69	req.Header.Set("User-Agent", "honksnonk/5.0")
 70	req.Header.Set("Content-Type", theonetruename)
 71	zig(keyname, key, req, msg)
 72	resp, err := client.Do(req)
 73	if err != nil {
 74		return err
 75	}
 76	resp.Body.Close()
 77	switch resp.StatusCode {
 78	case 200:
 79	case 201:
 80	case 202:
 81	default:
 82		return fmt.Errorf("http post status: %d", resp.StatusCode)
 83	}
 84	log.Printf("successful post: %s %d", url, resp.StatusCode)
 85	return nil
 86}
 87
 88type gzCloser struct {
 89	r     *gzip.Reader
 90	under io.ReadCloser
 91}
 92
 93func (gz *gzCloser) Read(p []byte) (int, error) {
 94	return gz.r.Read(p)
 95}
 96
 97func (gz *gzCloser) Close() error {
 98	defer gz.under.Close()
 99	return gz.r.Close()
100}
101
102func GetJunk(url string) (junk.Junk, error) {
103	client := http.DefaultClient
104	req, err := http.NewRequest("GET", url, nil)
105	if err != nil {
106		return nil, err
107	}
108	at := thefakename
109	if strings.Contains(url, ".well-known/webfinger?resource") {
110		at = "application/jrd+json"
111	}
112	req.Header.Set("Accept", at)
113	req.Header.Set("Accept-Encoding", "gzip")
114	req.Header.Set("User-Agent", "honksnonk/5.0")
115	resp, err := client.Do(req)
116	if err != nil {
117		log.Printf("first get failed: %s", err)
118		resp, err = client.Do(req)
119		if err != nil {
120			return nil, err
121		}
122		log.Printf("retry succeeded!")
123	}
124	if resp.StatusCode != 200 {
125		resp.Body.Close()
126		return nil, fmt.Errorf("http get status: %d", resp.StatusCode)
127	}
128	if strings.EqualFold(resp.Header.Get("Content-Encoding"), "gzip") {
129		gz, err := gzip.NewReader(resp.Body)
130		if err != nil {
131			resp.Body.Close()
132			return nil, err
133		}
134		resp.Body = &gzCloser{r: gz, under: resp.Body}
135	}
136	defer resp.Body.Close()
137	j, err := junk.Read(resp.Body)
138	return j, err
139}
140
141func savedonk(url string, name, media string, localize bool) *Donk {
142	if url == "" {
143		return nil
144	}
145	var donk Donk
146	row := stmtFindFile.QueryRow(url)
147	err := row.Scan(&donk.FileID)
148	if err == nil {
149		return &donk
150	}
151	log.Printf("saving donk: %s", url)
152	if err != nil && err != sql.ErrNoRows {
153		log.Printf("error querying: %s", err)
154	}
155	xid := xfiltrate()
156	data := []byte{}
157	if localize {
158		resp, err := http.Get(url)
159		if err != nil {
160			log.Printf("error fetching %s: %s", url, err)
161			localize = false
162			goto saveit
163		}
164		defer resp.Body.Close()
165		if resp.StatusCode != 200 {
166			localize = false
167			goto saveit
168		}
169		var buf bytes.Buffer
170		io.Copy(&buf, resp.Body)
171
172		data = buf.Bytes()
173		if strings.HasPrefix(media, "image") {
174			img, err := image.Vacuum(&buf, image.Params{MaxWidth: 2048, MaxHeight: 2048})
175			if err != nil {
176				log.Printf("unable to decode image: %s", err)
177				localize = false
178				goto saveit
179			}
180			data = img.Data
181			media = "image/" + img.Format
182		}
183	}
184saveit:
185	res, err := stmtSaveFile.Exec(xid, name, url, media, localize, data)
186	if err != nil {
187		log.Printf("error saving file %s: %s", url, err)
188		return nil
189	}
190	donk.FileID, _ = res.LastInsertId()
191	return &donk
192}
193
194func needxonk(user *WhatAbout, x *Honk) bool {
195	if x.What == "eradicate" {
196		return true
197	}
198	if thoudostbitethythumb(user.ID, x.Audience, x.XID) {
199		log.Printf("not saving thumb biter? %s via %s", x.XID, x.Honker)
200		return false
201	}
202	return needxonkid(user, x.XID)
203}
204func needxonkid(user *WhatAbout, xid string) bool {
205	if strings.HasPrefix(xid, user.URL+"/h/") {
206		return false
207	}
208	row := stmtFindXonk.QueryRow(user.ID, xid)
209	var id int64
210	err := row.Scan(&id)
211	if err == nil {
212		return false
213	}
214	if err != sql.ErrNoRows {
215		log.Printf("err querying xonk: %s", err)
216	}
217	return true
218}
219
220func savexonk(user *WhatAbout, x *Honk) {
221	if x.What == "eradicate" {
222		log.Printf("eradicating %s by %s", x.XID, x.Honker)
223		xonk := getxonk(user.ID, x.XID)
224		if xonk != nil {
225			stmtZonkDonks.Exec(xonk.ID)
226			_, err := stmtZonkIt.Exec(user.ID, x.XID)
227			if err != nil {
228				log.Printf("error eradicating: %s", err)
229			}
230		}
231		return
232	}
233	log.Printf("saving xonk: %s", x.XID)
234	dt := x.Date.UTC().Format(dbtimeformat)
235	aud := strings.Join(x.Audience, " ")
236	whofore := 0
237	if strings.Contains(aud, user.URL) {
238		whofore = 1
239	}
240	res, err := stmtSaveHonk.Exec(x.UserID, x.What, x.Honker, x.XID, x.RID, dt, x.URL, aud,
241		x.Noise, x.Convoy, whofore, "html", x.Precis, x.Oonker)
242	if err != nil {
243		log.Printf("err saving xonk: %s", err)
244		return
245	}
246	x.ID, _ = res.LastInsertId()
247	for _, d := range x.Donks {
248		_, err = stmtSaveDonk.Exec(x.ID, d.FileID)
249		if err != nil {
250			log.Printf("err saving donk: %s", err)
251			return
252		}
253	}
254}
255
256type Box struct {
257	In     string
258	Out    string
259	Shared string
260}
261
262var boxofboxes = make(map[string]*Box)
263var boxlock sync.Mutex
264var boxinglock sync.Mutex
265
266func getboxes(ident string) (*Box, error) {
267	boxlock.Lock()
268	b, ok := boxofboxes[ident]
269	boxlock.Unlock()
270	if ok {
271		return b, nil
272	}
273
274	boxinglock.Lock()
275	defer boxinglock.Unlock()
276
277	boxlock.Lock()
278	b, ok = boxofboxes[ident]
279	boxlock.Unlock()
280	if ok {
281		return b, nil
282	}
283
284	var info string
285	row := stmtGetXonker.QueryRow(ident, "boxes")
286	err := row.Scan(&info)
287	if err != nil {
288		j, err := GetJunk(ident)
289		if err != nil {
290			return nil, err
291		}
292		inbox, _ := j.GetString("inbox")
293		outbox, _ := j.GetString("outbox")
294		sbox, _ := j.FindString([]string{"endpoints", "sharedInbox"})
295		b = &Box{In: inbox, Out: outbox, Shared: sbox}
296		if inbox != "" {
297			m := strings.Join([]string{inbox, outbox, sbox}, " ")
298			_, err = stmtSaveXonker.Exec(ident, m, "boxes")
299			if err != nil {
300				log.Printf("error saving boxes: %s", err)
301			}
302		}
303	} else {
304		m := strings.Split(info, " ")
305		b = &Box{In: m[0], Out: m[1], Shared: m[2]}
306	}
307
308	boxlock.Lock()
309	boxofboxes[ident] = b
310	boxlock.Unlock()
311	return b, nil
312}
313
314func gimmexonks(user *WhatAbout, outbox string) {
315	log.Printf("getting outbox: %s", outbox)
316	j, err := GetJunk(outbox)
317	if err != nil {
318		log.Printf("error getting outbox: %s", err)
319		return
320	}
321	t, _ := j.GetString("type")
322	origin := originate(outbox)
323	if t == "OrderedCollection" {
324		items, _ := j.GetArray("orderedItems")
325		if items == nil {
326			obj, ok := j.GetMap("first")
327			if ok {
328				items, _ = obj.GetArray("orderedItems")
329			} else {
330				page1, _ := j.GetString("first")
331				j, err = GetJunk(page1)
332				if err != nil {
333					log.Printf("error gettings page1: %s", err)
334					return
335				}
336				items, _ = j.GetArray("orderedItems")
337			}
338		}
339		if len(items) > 20 {
340			items = items[0:20]
341		}
342		for i, j := 0, len(items)-1; i < j; i, j = i+1, j-1 {
343			items[i], items[j] = items[j], items[i]
344		}
345		for _, item := range items {
346			obj, ok := item.(junk.Junk)
347			if !ok {
348				continue
349			}
350			xonk := xonkxonk(user, obj, origin)
351			if xonk != nil {
352				savexonk(user, xonk)
353			}
354		}
355	}
356}
357
358func peeppeep() {
359	user, _ := butwhatabout("htest")
360	honkers := gethonkers(user.ID)
361	for _, f := range honkers {
362		if f.Flavor != "peep" {
363			continue
364		}
365		log.Printf("getting updates: %s", f.XID)
366		box, err := getboxes(f.XID)
367		if err != nil {
368			log.Printf("error getting outbox: %s", err)
369			continue
370		}
371		gimmexonks(user, box.Out)
372	}
373}
374func whosthere(xid string) ([]string, string) {
375	obj, err := GetJunk(xid)
376	if err != nil {
377		log.Printf("error getting remote xonk: %s", err)
378		return nil, ""
379	}
380	convoy, _ := obj.GetString("context")
381	if convoy == "" {
382		convoy, _ = obj.GetString("conversation")
383	}
384	return newphone(nil, obj), convoy
385}
386
387func newphone(a []string, obj junk.Junk) []string {
388	for _, addr := range []string{"to", "cc", "attributedTo"} {
389		who, _ := obj.GetString(addr)
390		if who != "" {
391			a = append(a, who)
392		}
393		whos, _ := obj.GetArray(addr)
394		for _, w := range whos {
395			who, _ := w.(string)
396			if who != "" {
397				a = append(a, who)
398			}
399		}
400	}
401	return a
402}
403
404func consumeactivity(user *WhatAbout, j junk.Junk, origin string) {
405	xonk := xonkxonk(user, j, origin)
406	if xonk != nil {
407		savexonk(user, xonk)
408	}
409}
410
411func xonkxonk(user *WhatAbout, item junk.Junk, origin string) *Honk {
412	depth := 0
413	maxdepth := 4
414	currenttid := ""
415	var xonkxonkfn func(item junk.Junk, origin string) *Honk
416
417	saveoneup := func(xid string) {
418		log.Printf("getting oneup: %s", xid)
419		if depth >= maxdepth {
420			log.Printf("in too deep")
421			return
422		}
423		obj, err := GetJunk(xid)
424		if err != nil {
425			log.Printf("error getting oneup: %s", err)
426			return
427		}
428		depth++
429		xonk := xonkxonkfn(obj, originate(xid))
430		if xonk != nil {
431			savexonk(user, xonk)
432		}
433		depth--
434	}
435
436	xonkxonkfn = func(item junk.Junk, origin string) *Honk {
437		// id, _ := item.GetString( "id")
438		what, _ := item.GetString("type")
439		dt, _ := item.GetString("published")
440
441		var audience []string
442		var err error
443		var xid, rid, url, content, precis, convoy, oonker string
444		var obj junk.Junk
445		var ok bool
446		switch what {
447		case "Announce":
448			obj, ok = item.GetMap("object")
449			if ok {
450				xid, _ = obj.GetString("id")
451			} else {
452				xid, _ = item.GetString("object")
453			}
454			if !needxonkid(user, xid) {
455				return nil
456			}
457			log.Printf("getting bonk: %s", xid)
458			obj, err = GetJunk(xid)
459			if err != nil {
460				log.Printf("error regetting: %s", err)
461			}
462			origin = originate(xid)
463			what = "bonk"
464		case "Create":
465			obj, _ = item.GetMap("object")
466			what = "honk"
467		case "Delete":
468			obj, _ = item.GetMap("object")
469			xid, _ = item.GetString("object")
470			what = "eradicate"
471		case "Question":
472			fallthrough
473		case "Note":
474			fallthrough
475		case "Article":
476			fallthrough
477		case "Page":
478			obj = item
479			what = "honk"
480		default:
481			log.Printf("unknown activity: %s", what)
482			fd, _ := os.OpenFile("savedinbox.json", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
483			item.Write(fd)
484			io.WriteString(fd, "\n")
485			fd.Close()
486			return nil
487		}
488
489		var xonk Honk
490		who, _ := item.GetString("actor")
491		if obj != nil {
492			if who == "" {
493				who, _ = obj.GetString("attributedTo")
494			}
495			oonker, _ = obj.GetString("attributedTo")
496			ot, _ := obj.GetString("type")
497			url, _ = obj.GetString("url")
498			if ot == "Note" || ot == "Article" || ot == "Page" || ot == "Question" {
499				audience = newphone(audience, obj)
500				xid, _ = obj.GetString("id")
501				precis, _ = obj.GetString("summary")
502				content, _ = obj.GetString("content")
503				if !strings.HasPrefix(content, "<p>") {
504					content = "<p>" + content
505				}
506				rid, _ = obj.GetString("inReplyTo")
507				convoy, _ = obj.GetString("context")
508				if convoy == "" {
509					convoy, _ = obj.GetString("conversation")
510				}
511				if ot == "Question" {
512					what = "qonk"
513					content += "<ul>"
514					ans, _ := obj.GetArray("oneOf")
515					for _, ai := range ans {
516						a, ok := ai.(junk.Junk)
517						if !ok {
518							continue
519						}
520						as, _ := a.GetString("name")
521						content += "<li>" + as
522					}
523					ans, _ = obj.GetArray("anyOf")
524					for _, ai := range ans {
525						a, ok := ai.(junk.Junk)
526						if !ok {
527							continue
528						}
529						as, _ := a.GetString("name")
530						content += "<li>" + as
531					}
532					content += "</ul>"
533				}
534				if what == "honk" && rid != "" {
535					what = "tonk"
536				}
537			}
538			if ot == "Tombstone" {
539				xid, _ = obj.GetString("id")
540			}
541			atts, _ := obj.GetArray("attachment")
542			for i, atti := range atts {
543				att, ok := atti.(junk.Junk)
544				if !ok {
545					continue
546				}
547				at, _ := att.GetString("type")
548				mt, _ := att.GetString("mediaType")
549				u, _ := att.GetString("url")
550				name, _ := att.GetString("name")
551				localize := false
552				if i > 4 {
553					log.Printf("excessive attachment: %s", at)
554				} else if at == "Document" || at == "Image" {
555					mt = strings.ToLower(mt)
556					log.Printf("attachment: %s %s", mt, u)
557					if mt == "image/jpeg" || mt == "image/png" ||
558						mt == "text/plain" {
559						localize = true
560					}
561				} else {
562					log.Printf("unknown attachment: %s", at)
563				}
564				donk := savedonk(u, name, mt, localize)
565				if donk != nil {
566					xonk.Donks = append(xonk.Donks, donk)
567				}
568			}
569			tags, _ := obj.GetArray("tag")
570			for _, tagi := range tags {
571				tag, ok := tagi.(junk.Junk)
572				if !ok {
573					continue
574				}
575				tt, _ := tag.GetString("type")
576				name, _ := tag.GetString("name")
577				if tt == "Emoji" {
578					icon, _ := tag.GetMap("icon")
579					mt, _ := icon.GetString("mediaType")
580					if mt == "" {
581						mt = "image/png"
582					}
583					u, _ := icon.GetString("url")
584					donk := savedonk(u, name, mt, true)
585					if donk != nil {
586						xonk.Donks = append(xonk.Donks, donk)
587					}
588				}
589			}
590		}
591		if originate(xid) != origin {
592			log.Printf("original sin: %s <> %s", xid, origin)
593			item.Write(os.Stdout)
594			return nil
595		}
596		audience = append(audience, who)
597
598		audience = oneofakind(audience)
599
600		if currenttid == "" {
601			currenttid = convoy
602		}
603		if convoy == "" {
604			convoy = currenttid
605		}
606
607		if oonker == who {
608			oonker = ""
609		}
610		xonk.UserID = user.ID
611		xonk.What = what
612		xonk.Honker = who
613		xonk.XID = xid
614		xonk.RID = rid
615		xonk.Date, _ = time.Parse(time.RFC3339, dt)
616		xonk.URL = url
617		xonk.Noise = content
618		xonk.Precis = precis
619		xonk.Audience = audience
620		xonk.Convoy = convoy
621		xonk.Oonker = oonker
622
623		if needxonk(user, &xonk) {
624			if what == "tonk" {
625				if needxonkid(user, rid) {
626					saveoneup(rid)
627				}
628			}
629			return &xonk
630		}
631		return nil
632	}
633
634	return xonkxonkfn(item, origin)
635}
636
637func rubadubdub(user *WhatAbout, req junk.Junk) {
638	xid, _ := req.GetString("id")
639	actor, _ := req.GetString("actor")
640	j := junk.New()
641	j["@context"] = itiswhatitis
642	j["id"] = user.URL + "/dub/" + xid
643	j["type"] = "Accept"
644	j["actor"] = user.URL
645	j["to"] = actor
646	j["published"] = time.Now().UTC().Format(time.RFC3339)
647	j["object"] = req
648
649	var buf bytes.Buffer
650	j.Write(&buf)
651	msg := buf.Bytes()
652
653	deliverate(0, user.Name, actor, msg)
654}
655
656func itakeitallback(user *WhatAbout, xid string) {
657	j := junk.New()
658	j["@context"] = itiswhatitis
659	j["id"] = user.URL + "/unsub/" + xid
660	j["type"] = "Undo"
661	j["actor"] = user.URL
662	j["to"] = xid
663	f := junk.New()
664	f["id"] = user.URL + "/sub/" + xid
665	f["type"] = "Follow"
666	f["actor"] = user.URL
667	f["to"] = xid
668	j["object"] = f
669	j["published"] = time.Now().UTC().Format(time.RFC3339)
670
671	var buf bytes.Buffer
672	j.Write(&buf)
673	msg := buf.Bytes()
674
675	deliverate(0, user.Name, xid, msg)
676}
677
678func subsub(user *WhatAbout, xid string) {
679	j := junk.New()
680	j["@context"] = itiswhatitis
681	j["id"] = user.URL + "/sub/" + xid
682	j["type"] = "Follow"
683	j["actor"] = user.URL
684	j["to"] = xid
685	j["object"] = xid
686	j["published"] = time.Now().UTC().Format(time.RFC3339)
687
688	var buf bytes.Buffer
689	j.Write(&buf)
690	msg := buf.Bytes()
691
692	deliverate(0, user.Name, xid, msg)
693}
694
695var re_spicy = regexp.MustCompile("^(\U0001f336\ufe0f?){3}")
696
697func jonkjonk(user *WhatAbout, h *Honk) (junk.Junk, junk.Junk) {
698	dt := h.Date.Format(time.RFC3339)
699	var jo junk.Junk
700	j := junk.New()
701	j["id"] = user.URL + "/" + h.What + "/" + shortxid(h.XID)
702	j["actor"] = user.URL
703	j["published"] = dt
704	j["to"] = h.Audience[0]
705	if len(h.Audience) > 1 {
706		j["cc"] = h.Audience[1:]
707	}
708
709	switch h.What {
710	case "tonk":
711		fallthrough
712	case "honk":
713		j["type"] = "Create"
714
715		jo = junk.New()
716		jo["id"] = h.XID
717		jo["type"] = "Note"
718		jo["published"] = dt
719		jo["url"] = h.XID
720		jo["attributedTo"] = user.URL
721		if h.RID != "" {
722			jo["inReplyTo"] = h.RID
723		}
724		if h.Convoy != "" {
725			jo["context"] = h.Convoy
726			jo["conversation"] = h.Convoy
727		}
728		jo["to"] = h.Audience[0]
729		if len(h.Audience) > 1 {
730			jo["cc"] = h.Audience[1:]
731		}
732		if !h.Public {
733			jo["directMessage"] = true
734		}
735		jo["summary"] = h.Precis
736		jo["content"] = mentionize(h.Noise)
737		if strings.HasPrefix(h.Precis, "DZ:") || re_spicy.MatchString(h.Noise) {
738			jo["sensitive"] = true
739		}
740		var tags []interface{}
741		g := bunchofgrapes(h.Noise)
742		for _, m := range g {
743			t := junk.New()
744			t["type"] = "Mention"
745			t["name"] = m.who
746			t["href"] = m.where
747			tags = append(tags, t)
748		}
749		ooo := ontologies(h.Noise)
750		for _, o := range ooo {
751			t := junk.New()
752			t["type"] = "Hashtag"
753			t["name"] = o
754			tags = append(tags, t)
755		}
756		herd := herdofemus(h.Noise)
757		for _, e := range herd {
758			t := junk.New()
759			t["id"] = e.ID
760			t["type"] = "Emoji"
761			t["name"] = e.Name
762			i := junk.New()
763			i["type"] = "Image"
764			i["mediaType"] = "image/png"
765			i["url"] = e.ID
766			t["icon"] = i
767			tags = append(tags, t)
768		}
769		if len(tags) > 0 {
770			jo["tag"] = tags
771		}
772		var atts []interface{}
773		for _, d := range h.Donks {
774			if re_emus.MatchString(d.Name) {
775				continue
776			}
777			jd := junk.New()
778			jd["mediaType"] = d.Media
779			jd["name"] = d.Name
780			jd["type"] = "Document"
781			jd["url"] = d.URL
782			atts = append(atts, jd)
783		}
784		if len(atts) > 0 {
785			jo["attachment"] = atts
786		}
787		j["object"] = jo
788	case "bonk":
789		j["type"] = "Announce"
790		j["object"] = h.XID
791	case "zonk":
792		j["type"] = "Delete"
793		j["object"] = h.XID
794	}
795
796	return j, jo
797}
798
799func honkworldwide(user *WhatAbout, honk *Honk) {
800	jonk, _ := jonkjonk(user, honk)
801	jonk["@context"] = itiswhatitis
802	var buf bytes.Buffer
803	jonk.Write(&buf)
804	msg := buf.Bytes()
805
806	rcpts := make(map[string]bool)
807	for _, a := range honk.Audience {
808		if a != thewholeworld && a != user.URL && !strings.HasSuffix(a, "/followers") {
809			box, _ := getboxes(a)
810			if box != nil {
811				if honk.Public && box.Shared != "" {
812					rcpts["%"+box.Shared] = true
813				} else {
814					rcpts["%"+box.In] = true
815				}
816			} else {
817				rcpts[a] = true
818			}
819		}
820	}
821	if honk.Public {
822		for _, f := range getdubs(user.ID) {
823			box, _ := getboxes(f.XID)
824			if box != nil && box.Shared != "" {
825				rcpts["%"+box.Shared] = true
826			} else {
827				rcpts[f.XID] = true
828			}
829		}
830	}
831	for a := range rcpts {
832		go deliverate(0, user.Name, a, msg)
833	}
834}
835
836func asjonker(user *WhatAbout) junk.Junk {
837	about := obfusbreak(user.About)
838
839	j := junk.New()
840	j["@context"] = itiswhatitis
841	j["id"] = user.URL
842	j["type"] = "Person"
843	j["inbox"] = user.URL + "/inbox"
844	j["outbox"] = user.URL + "/outbox"
845	j["followers"] = user.URL + "/followers"
846	j["following"] = user.URL + "/following"
847	j["name"] = user.Display
848	j["preferredUsername"] = user.Name
849	j["summary"] = about
850	j["url"] = user.URL
851	a := junk.New()
852	a["type"] = "icon"
853	a["mediaType"] = "image/png"
854	a["url"] = fmt.Sprintf("https://%s/a?a=%s", serverName, url.QueryEscape(user.URL))
855	j["icon"] = a
856	k := junk.New()
857	k["id"] = user.URL + "#key"
858	k["owner"] = user.URL
859	k["publicKeyPem"] = user.Key
860	j["publicKey"] = k
861
862	return j
863}
864
865var handfull = make(map[string]string)
866var handlock sync.Mutex
867
868func gofish(name string) string {
869	if name[0] == '@' {
870		name = name[1:]
871	}
872	m := strings.Split(name, "@")
873	if len(m) != 2 {
874		log.Printf("bad fish name: %s", name)
875		return ""
876	}
877	handlock.Lock()
878	ref, ok := handfull[name]
879	handlock.Unlock()
880	if ok {
881		return ref
882	}
883	row := stmtGetXonker.QueryRow(name, "fishname")
884	var href string
885	err := row.Scan(&href)
886	if err == nil {
887		handlock.Lock()
888		handfull[name] = href
889		handlock.Unlock()
890		return href
891	}
892	log.Printf("fishing for %s", name)
893	j, err := GetJunk(fmt.Sprintf("https://%s/.well-known/webfinger?resource=acct:%s", m[1], name))
894	if err != nil {
895		log.Printf("failed to go fish %s: %s", name, err)
896		handlock.Lock()
897		handfull[name] = ""
898		handlock.Unlock()
899		return ""
900	}
901	links, _ := j.GetArray("links")
902	for _, li := range links {
903		l, ok := li.(junk.Junk)
904		if !ok {
905			continue
906		}
907		href, _ := l.GetString("href")
908		rel, _ := l.GetString("rel")
909		t, _ := l.GetString("type")
910		if rel == "self" && friendorfoe(t) {
911			stmtSaveXonker.Exec(name, href, "fishname")
912			handlock.Lock()
913			handfull[name] = href
914			handlock.Unlock()
915			return href
916		}
917	}
918	handlock.Lock()
919	handfull[name] = ""
920	handlock.Unlock()
921	return ""
922}
923
924func investigate(name string) string {
925	if name == "" {
926		return ""
927	}
928	if name[0] == '@' {
929		name = gofish(name)
930	}
931	if name == "" {
932		return ""
933	}
934	obj, err := GetJunk(name)
935	if err != nil {
936		log.Printf("error investigating honker: %s", err)
937		return ""
938	}
939	t, _ := obj.GetString("type")
940	id, _ := obj.GetString("id")
941	if t != "Person" {
942		log.Printf("it's not a person! %s", name)
943		return ""
944	}
945	return id
946}