702 lines
16 KiB
Go
702 lines
16 KiB
Go
//
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// Copyright (c) 2019 Ted Unangst <tedu@tedunangst.com>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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package main
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import (
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"crypto/rand"
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"crypto/sha512"
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"fmt"
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"html/template"
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"io"
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"net/http"
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"net/url"
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"os"
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"regexp"
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"strings"
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"time"
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"golang.org/x/net/html"
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"humungus.tedunangst.com/r/webs/cache"
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"humungus.tedunangst.com/r/webs/htfilter"
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"humungus.tedunangst.com/r/webs/httpsig"
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"humungus.tedunangst.com/r/webs/mz"
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"humungus.tedunangst.com/r/webs/templates"
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)
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var allowedclasses = make(map[string]bool)
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func init() {
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allowedclasses["kw"] = true
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allowedclasses["bi"] = true
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allowedclasses["st"] = true
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allowedclasses["nm"] = true
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allowedclasses["tp"] = true
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allowedclasses["op"] = true
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allowedclasses["cm"] = true
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allowedclasses["al"] = true
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allowedclasses["dl"] = true
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}
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var relingo = make(map[string]string)
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func loadLingo() {
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for _, l := range []string{"honked", "bonked", "honked back", "qonked", "evented"} {
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v := l
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k := "lingo-" + strings.ReplaceAll(l, " ", "")
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getconfig(k, &v)
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relingo[l] = v
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}
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}
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func reverbolate(userid int64, honks []*Honk) {
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var user *WhatAbout
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somenumberedusers.Get(userid, &user)
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for _, h := range honks {
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h.What += "ed"
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if h.What == "tonked" {
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h.What = "honked back"
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h.Style += " subtle"
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}
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if !h.Public {
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h.Style += " limited"
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}
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if h.Whofore == 1 {
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h.Style += " atme"
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}
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translate(h)
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local := false
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if h.Whofore == 2 || h.Whofore == 3 {
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local = true
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}
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if local && h.What != "bonked" {
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h.Noise = re_memes.ReplaceAllString(h.Noise, "")
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}
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h.Username, h.Handle = handles(h.Honker)
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if !local {
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short := shortname(userid, h.Honker)
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if short != "" {
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h.Username = short
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} else {
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h.Username = h.Handle
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if len(h.Username) > 20 {
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h.Username = h.Username[:20] + ".."
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}
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}
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}
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if user != nil {
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hset := []string{}
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if h.Honker != user.URL {
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hset = append(hset, "@"+h.Handle)
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}
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if user.Options.MentionAll {
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for _, a := range h.Audience {
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if a == h.Honker || a == user.URL {
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continue
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}
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_, hand := handles(a)
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if hand != "" {
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hand = "@" + hand
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hset = append(hset, hand)
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}
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}
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}
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h.Handles = strings.Join(hset, " ")
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}
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if h.URL == "" {
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h.URL = h.XID
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}
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if h.Oonker != "" {
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_, h.Oondle = handles(h.Oonker)
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}
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h.Precis = demoji(h.Precis)
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h.Noise = demoji(h.Noise)
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h.Open = "open"
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for _, m := range h.Mentions {
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if m.Where != h.Honker && !m.IsPresent(h.Noise) {
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h.Noise = "(" + m.Who + ")" + h.Noise
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}
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}
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zap := make(map[string]bool)
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{
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var htf htfilter.Filter
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htf.Imager = replaceimgsand(zap, false)
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htf.SpanClasses = allowedclasses
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htf.BaseURL, _ = url.Parse(h.XID)
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emuxifier := func(e string) string {
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for _, d := range h.Donks {
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if d.Name == e {
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zap[d.XID] = true
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if d.Local {
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return fmt.Sprintf(`<img class="emu" title="%s" src="/d/%s">`, d.Name, d.XID)
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}
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}
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}
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if local && h.What != "bonked" {
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var emu Emu
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emucache.Get(e, &emu)
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if emu.ID != "" {
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return fmt.Sprintf(`<img class="emu" title="%s" src="%s">`, emu.Name, emu.ID)
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}
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}
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return e
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}
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htf.FilterText = func(w io.Writer, data string) {
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data = htfilter.EscapeText(data)
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data = re_emus.ReplaceAllStringFunc(data, emuxifier)
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io.WriteString(w, data)
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}
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p, _ := htf.String(h.Precis)
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n, _ := htf.String(h.Noise)
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h.Precis = string(p)
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h.Noise = string(n)
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}
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j := 0
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for i := 0; i < len(h.Donks); i++ {
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if !zap[h.Donks[i].XID] {
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h.Donks[j] = h.Donks[i]
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j++
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}
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}
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h.Donks = h.Donks[:j]
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}
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unsee(honks, userid)
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for _, h := range honks {
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renderflags(h)
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h.HTPrecis = template.HTML(h.Precis)
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h.HTML = template.HTML(h.Noise)
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if redo := relingo[h.What]; redo != "" {
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h.What = redo
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}
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}
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}
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func replaceimgsand(zap map[string]bool, absolute bool) func(node *html.Node) string {
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return func(node *html.Node) string {
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src := htfilter.GetAttr(node, "src")
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alt := htfilter.GetAttr(node, "alt")
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//title := GetAttr(node, "title")
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if htfilter.HasClass(node, "Emoji") && alt != "" {
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return alt
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}
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d := finddonk(src)
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if d != nil {
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zap[d.XID] = true
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base := ""
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if absolute {
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base = "https://" + serverName
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}
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return string(templates.Sprintf(`<img alt="%s" title="%s" src="%s/d/%s">`, alt, alt, base, d.XID))
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}
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return string(templates.Sprintf(`<img alt="%s" src="<a href="%s">%s</a>">`, alt, src, src))
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}
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}
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func translatechonk(ch *Chonk) {
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noise := ch.Noise
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if ch.Format == "markdown" {
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noise = markitzero(noise)
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}
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var htf htfilter.Filter
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htf.SpanClasses = allowedclasses
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htf.BaseURL, _ = url.Parse(ch.XID)
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ch.HTML, _ = htf.String(noise)
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}
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func filterchonk(ch *Chonk) {
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translatechonk(ch)
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noise := string(ch.HTML)
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local := originate(ch.XID) == serverName
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zap := make(map[string]bool)
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emuxifier := func(e string) string {
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for _, d := range ch.Donks {
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if d.Name == e {
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zap[d.XID] = true
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if d.Local {
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return fmt.Sprintf(`<img class="emu" title="%s" src="/d/%s">`, d.Name, d.XID)
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}
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}
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}
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if local {
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var emu Emu
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emucache.Get(e, &emu)
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if emu.ID != "" {
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return fmt.Sprintf(`<img class="emu" title="%s" src="%s">`, emu.Name, emu.ID)
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}
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}
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return e
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}
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noise = re_emus.ReplaceAllStringFunc(noise, emuxifier)
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j := 0
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for i := 0; i < len(ch.Donks); i++ {
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if !zap[ch.Donks[i].XID] {
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ch.Donks[j] = ch.Donks[i]
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j++
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}
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}
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ch.Donks = ch.Donks[:j]
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if strings.HasPrefix(noise, "<p>") {
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noise = noise[3:]
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}
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ch.HTML = template.HTML(noise)
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if short := shortname(ch.UserID, ch.Who); short != "" {
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ch.Handle = short
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} else {
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ch.Handle, _ = handles(ch.Who)
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}
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}
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func inlineimgsfor(honk *Honk) func(node *html.Node) string {
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return func(node *html.Node) string {
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src := htfilter.GetAttr(node, "src")
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alt := htfilter.GetAttr(node, "alt")
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d := savedonk(src, "image", alt, "image", true)
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if d != nil {
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honk.Donks = append(honk.Donks, d)
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}
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dlog.Printf("inline img with src: %s", src)
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return ""
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}
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}
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func imaginate(honk *Honk) {
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var htf htfilter.Filter
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htf.Imager = inlineimgsfor(honk)
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htf.BaseURL, _ = url.Parse(honk.XID)
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htf.String(honk.Noise)
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}
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var re_dangerous = regexp.MustCompile("^[a-zA-Z]{2}:")
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func precipitate(honk *Honk) {
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noise := honk.Noise
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if re_dangerous.MatchString(noise) {
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idx := strings.Index(noise, "\n")
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if idx == -1 {
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honk.Precis = noise
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noise = ""
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} else {
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honk.Precis = noise[:idx]
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noise = noise[idx+1:]
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}
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}
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honk.Precis = markitzero(strings.TrimSpace(honk.Precis))
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honk.Noise = noise
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}
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func translate(honk *Honk) {
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if honk.Format == "html" {
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return
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}
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noise := honk.Noise
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var marker mz.Marker
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marker.HashLinker = ontoreplacer
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marker.AtLinker = attoreplacer
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noise = strings.TrimSpace(noise)
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noise = marker.Mark(noise)
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honk.Noise = noise
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honk.Onts = oneofakind(marker.HashTags)
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honk.Mentions = bunchofgrapes(marker.Mentions)
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}
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func redoimages(honk *Honk) {
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zap := make(map[string]bool)
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{
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var htf htfilter.Filter
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htf.Imager = replaceimgsand(zap, true)
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htf.SpanClasses = allowedclasses
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p, _ := htf.String(honk.Precis)
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n, _ := htf.String(honk.Noise)
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honk.Precis = string(p)
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honk.Noise = string(n)
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}
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j := 0
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for i := 0; i < len(honk.Donks); i++ {
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if !zap[honk.Donks[i].XID] {
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honk.Donks[j] = honk.Donks[i]
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j++
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}
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}
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honk.Donks = honk.Donks[:j]
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honk.Noise = re_memes.ReplaceAllString(honk.Noise, "")
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honk.Noise = strings.Replace(honk.Noise, "<a href=", "<a class=\"mention u-url\" href=", -1)
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}
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func xcelerate(b []byte) string {
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letters := "BCDFGHJKLMNPQRSTVWXYZbcdfghjklmnpqrstvwxyz1234567891234567891234"
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for i, c := range b {
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b[i] = letters[c&63]
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}
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s := string(b)
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return s
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}
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func shortxid(xid string) string {
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h := sha512.New512_256()
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io.WriteString(h, xid)
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return xcelerate(h.Sum(nil)[:20])
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}
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func xfiltrate() string {
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var b [18]byte
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rand.Read(b[:])
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return xcelerate(b[:])
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}
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func grapevine(mentions []Mention) []string {
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var s []string
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for _, m := range mentions {
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s = append(s, m.Where)
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}
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return s
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}
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func bunchofgrapes(m []string) []Mention {
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var mentions []Mention
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for i := range m {
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where := gofish(m[i])
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if where != "" {
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mentions = append(mentions, Mention{Who: m[i], Where: where})
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}
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}
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return mentions
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}
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type Emu struct {
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ID string
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Name string
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Type string
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}
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var re_emus = regexp.MustCompile(`:[[:alnum:]_-]+:`)
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var emucache = cache.New(cache.Options{Filler: func(ename string) (Emu, bool) {
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fname := ename[1 : len(ename)-1]
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exts := []string{".png", ".gif"}
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for _, ext := range exts {
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_, err := os.Stat(dataDir + "/emus/" + fname + ext)
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if err != nil {
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continue
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}
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url := fmt.Sprintf("https://%s/emu/%s%s", serverName, fname, ext)
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return Emu{ID: url, Name: ename, Type: "image/" + ext[1:]}, true
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}
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return Emu{Name: ename, ID: "", Type: "image/png"}, true
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}, Duration: 10 * time.Second})
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func herdofemus(noise string) []Emu {
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m := re_emus.FindAllString(noise, -1)
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m = oneofakind(m)
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var emus []Emu
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for _, e := range m {
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var emu Emu
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emucache.Get(e, &emu)
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if emu.ID == "" {
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continue
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}
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emus = append(emus, emu)
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}
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return emus
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}
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var re_memes = regexp.MustCompile("meme: ?([^\n]+)")
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var re_avatar = regexp.MustCompile("avatar: ?([^\n]+)")
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var re_banner = regexp.MustCompile("banner: ?([^\n]+)")
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func memetize(honk *Honk) {
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repl := func(x string) string {
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name := x[5:]
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if name[0] == ' ' {
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name = name[1:]
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}
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fd, err := os.Open(dataDir + "/memes/" + name)
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if err != nil {
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ilog.Printf("no meme for %s", name)
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return x
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}
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var peek [512]byte
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n, _ := fd.Read(peek[:])
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ct := http.DetectContentType(peek[:n])
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fd.Close()
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url := fmt.Sprintf("https://%s/meme/%s", serverName, name)
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fileid, err := savefile(name, name, url, ct, false, nil)
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if err != nil {
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elog.Printf("error saving meme: %s", err)
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return x
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}
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d := &Donk{
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FileID: fileid,
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Name: name,
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Media: ct,
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URL: url,
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Local: false,
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}
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honk.Donks = append(honk.Donks, d)
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return ""
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}
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honk.Noise = re_memes.ReplaceAllStringFunc(honk.Noise, repl)
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}
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var re_quickmention = regexp.MustCompile("(^|[ \n])@[[:alnum:]]+([ \n.,']|$)")
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func quickrename(s string, userid int64) string {
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nonstop := true
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for nonstop {
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nonstop = false
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s = re_quickmention.ReplaceAllStringFunc(s, func(m string) string {
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prefix := ""
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if m[0] == ' ' || m[0] == '\n' {
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prefix = m[:1]
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m = m[1:]
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}
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prefix += "@"
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m = m[1:]
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tail := ""
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if last := m[len(m)-1]; last == ' ' || last == '\n' ||
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last == '.' || last == ',' || last == '\'' {
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tail = m[len(m)-1:]
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m = m[:len(m)-1]
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}
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xid := fullname(m, userid)
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if xid != "" {
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_, name := handles(xid)
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if name != "" {
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nonstop = true
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m = name
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}
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}
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return prefix + m + tail
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})
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}
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return s
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}
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var shortnames = cache.New(cache.Options{Filler: func(userid int64) (map[string]string, bool) {
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honkers := gethonkers(userid)
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m := make(map[string]string)
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for _, h := range honkers {
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m[h.XID] = h.Name
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}
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return m, true
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}, Invalidator: &honkerinvalidator})
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func shortname(userid int64, xid string) string {
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var m map[string]string
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ok := shortnames.Get(userid, &m)
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if ok {
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return m[xid]
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}
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return ""
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}
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var fullnames = cache.New(cache.Options{Filler: func(userid int64) (map[string]string, bool) {
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honkers := gethonkers(userid)
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m := make(map[string]string)
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for _, h := range honkers {
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m[h.Name] = h.XID
|
|
}
|
|
return m, true
|
|
}, Invalidator: &honkerinvalidator})
|
|
|
|
func fullname(name string, userid int64) string {
|
|
var m map[string]string
|
|
ok := fullnames.Get(userid, &m)
|
|
if ok {
|
|
return m[name]
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func attoreplacer(m string) string {
|
|
fill := `<span class="h-card"><a class="u-url mention" href="%s">%s</a></span>`
|
|
where := gofish(m)
|
|
if where == "" {
|
|
return m
|
|
}
|
|
who := m[0 : 1+strings.IndexByte(m[1:], '@')]
|
|
return fmt.Sprintf(fill, html.EscapeString(where), html.EscapeString(who))
|
|
}
|
|
|
|
func ontoreplacer(h string) string {
|
|
return fmt.Sprintf(`<a href="https://%s/o/%s">%s</a>`, serverName,
|
|
strings.ToLower(h[1:]), h)
|
|
}
|
|
|
|
var re_unurl = regexp.MustCompile("https://([^/]+).*/([^/]+)")
|
|
var re_urlhost = regexp.MustCompile("https://([^/ #)]+)")
|
|
|
|
func originate(u string) string {
|
|
m := re_urlhost.FindStringSubmatch(u)
|
|
if len(m) > 1 {
|
|
return m[1]
|
|
}
|
|
return ""
|
|
}
|
|
|
|
var allhandles = cache.New(cache.Options{Filler: func(xid string) (string, bool) {
|
|
handle := getxonker(xid, "handle")
|
|
if handle == "" {
|
|
dlog.Printf("need to get a handle: %s", xid)
|
|
info, err := investigate(xid)
|
|
if err != nil {
|
|
m := re_unurl.FindStringSubmatch(xid)
|
|
if len(m) > 2 {
|
|
handle = m[2]
|
|
} else {
|
|
handle = xid
|
|
}
|
|
} else {
|
|
handle = info.Name
|
|
}
|
|
}
|
|
return handle, true
|
|
}})
|
|
|
|
// handle, handle@host
|
|
func handles(xid string) (string, string) {
|
|
if xid == "" || xid == thewholeworld || strings.HasSuffix(xid, "/followers") {
|
|
return "", ""
|
|
}
|
|
var handle string
|
|
allhandles.Get(xid, &handle)
|
|
if handle == xid {
|
|
return xid, xid
|
|
}
|
|
return handle, handle + "@" + originate(xid)
|
|
}
|
|
|
|
func butnottooloud(aud []string) {
|
|
for i, a := range aud {
|
|
if strings.HasSuffix(a, "/followers") {
|
|
aud[i] = ""
|
|
}
|
|
}
|
|
}
|
|
|
|
func loudandproud(aud []string) bool {
|
|
for _, a := range aud {
|
|
if a == thewholeworld {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func firstclass(honk *Honk) bool {
|
|
return honk.Audience[0] == thewholeworld
|
|
}
|
|
|
|
func oneofakind(a []string) []string {
|
|
seen := make(map[string]bool)
|
|
seen[""] = true
|
|
j := 0
|
|
for _, s := range a {
|
|
if !seen[s] {
|
|
seen[s] = true
|
|
a[j] = s
|
|
j++
|
|
}
|
|
}
|
|
return a[:j]
|
|
}
|
|
|
|
var ziggies = cache.New(cache.Options{Filler: func(userid int64) (*KeyInfo, bool) {
|
|
var user *WhatAbout
|
|
ok := somenumberedusers.Get(userid, &user)
|
|
if !ok {
|
|
return nil, false
|
|
}
|
|
ki := new(KeyInfo)
|
|
ki.keyname = user.URL + "#key"
|
|
ki.seckey = user.SecKey
|
|
return ki, true
|
|
}})
|
|
|
|
func ziggy(userid int64) *KeyInfo {
|
|
var ki *KeyInfo
|
|
ziggies.Get(userid, &ki)
|
|
return ki
|
|
}
|
|
|
|
var zaggies = cache.New(cache.Options{Filler: func(keyname string) (httpsig.PublicKey, bool) {
|
|
data := getxonker(keyname, "pubkey")
|
|
if data == "" {
|
|
dlog.Printf("hitting the webs for missing pubkey: %s", keyname)
|
|
j, err := GetJunk(readyLuserOne, keyname)
|
|
if err != nil {
|
|
ilog.Printf("error getting %s pubkey: %s", keyname, err)
|
|
when := time.Now().UTC().Format(dbtimeformat)
|
|
stmtSaveXonker.Exec(keyname, "failed", "pubkey", when)
|
|
return httpsig.PublicKey{}, true
|
|
}
|
|
allinjest(originate(keyname), j)
|
|
data = getxonker(keyname, "pubkey")
|
|
if data == "" {
|
|
ilog.Printf("key not found after ingesting")
|
|
when := time.Now().UTC().Format(dbtimeformat)
|
|
stmtSaveXonker.Exec(keyname, "failed", "pubkey", when)
|
|
return httpsig.PublicKey{}, true
|
|
}
|
|
}
|
|
if data == "failed" {
|
|
ilog.Printf("lookup previously failed key %s", keyname)
|
|
return httpsig.PublicKey{}, true
|
|
}
|
|
_, key, err := httpsig.DecodeKey(data)
|
|
if err != nil {
|
|
ilog.Printf("error decoding %s pubkey: %s", keyname, err)
|
|
return key, true
|
|
}
|
|
return key, true
|
|
}, Limit: 512})
|
|
|
|
func zaggy(keyname string) (httpsig.PublicKey, error) {
|
|
var key httpsig.PublicKey
|
|
zaggies.Get(keyname, &key)
|
|
return key, nil
|
|
}
|
|
|
|
func savingthrow(keyname string) {
|
|
when := time.Now().Add(-30 * time.Minute).UTC().Format(dbtimeformat)
|
|
stmtDeleteXonker.Exec(keyname, "pubkey", when)
|
|
zaggies.Clear(keyname)
|
|
}
|
|
|
|
func keymatch(keyname string, actor string) string {
|
|
hash := strings.IndexByte(keyname, '#')
|
|
if hash == -1 {
|
|
hash = len(keyname)
|
|
}
|
|
owner := keyname[0:hash]
|
|
if owner == actor {
|
|
return originate(actor)
|
|
}
|
|
return ""
|
|
}
|