gosora/plugin_bbcode.go
Azareal d0ffc4be78 Refactored a few bits and pieces.
Added Riot as a dependency, I'm still deciding over whether to use this or Bleve.
Tweaked the topic view for Cosora.
Fixed a crash bug in the group creator.
Moved a few things from permissions.go into the ForumPermsStore, more to come here!
Added more tests.
Refactored the MySQL Query Generator.
Refactored the BBCode Parser.
Moved the presets into the Phrase System.
2017-11-05 01:04:57 +00:00

423 lines
12 KiB
Go

package main
import (
//"log"
//"fmt"
"bytes"
//"strings"
"math/rand"
"regexp"
"strconv"
"time"
)
var random *rand.Rand
var bbcodeInvalidNumber []byte
var bbcodeNoNegative []byte
var bbcodeMissingTag []byte
var bbcodeBold *regexp.Regexp
var bbcodeItalic *regexp.Regexp
var bbcodeUnderline *regexp.Regexp
var bbcodeStrikethrough *regexp.Regexp
var bbcodeURL *regexp.Regexp
var bbcodeURLLabel *regexp.Regexp
var bbcodeQuotes *regexp.Regexp
var bbcodeCode *regexp.Regexp
func init() {
plugins["bbcode"] = NewPlugin("bbcode", "BBCode", "Azareal", "http://github.com/Azareal", "", "", "", initBbcode, nil, deactivateBbcode, nil, nil)
}
func initBbcode() error {
//plugins["bbcode"].AddHook("parse_assign", bbcode_parse_without_code)
plugins["bbcode"].AddHook("parse_assign", bbcodeFullParse)
bbcodeInvalidNumber = []byte("<span style='color: red;'>[Invalid Number]</span>")
bbcodeNoNegative = []byte("<span style='color: red;'>[No Negative Numbers]</span>")
bbcodeMissingTag = []byte("<span style='color: red;'>[Missing Tag]</span>")
bbcodeBold = regexp.MustCompile(`(?s)\[b\](.*)\[/b\]`)
bbcodeItalic = regexp.MustCompile(`(?s)\[i\](.*)\[/i\]`)
bbcodeUnderline = regexp.MustCompile(`(?s)\[u\](.*)\[/u\]`)
bbcodeStrikethrough = regexp.MustCompile(`(?s)\[s\](.*)\[/s\]`)
urlpattern := `(http|https|ftp|mailto*)(:??)\/\/([\.a-zA-Z\/]+)`
bbcodeURL = regexp.MustCompile(`\[url\]` + urlpattern + `\[/url\]`)
bbcodeURLLabel = regexp.MustCompile(`(?s)\[url=` + urlpattern + `\](.*)\[/url\]`)
bbcodeQuotes = regexp.MustCompile(`\[quote\](.*)\[/quote\]`)
bbcodeCode = regexp.MustCompile(`\[code\](.*)\[/code\]`)
random = rand.New(rand.NewSource(time.Now().UnixNano()))
return nil
}
func deactivateBbcode() {
//plugins["bbcode"].RemoveHook("parse_assign", bbcode_parse_without_code)
plugins["bbcode"].RemoveHook("parse_assign", bbcodeFullParse)
}
func bbcodeRegexParse(msg string) string {
msg = bbcodeBold.ReplaceAllString(msg, "<b>$1</b>")
msg = bbcodeItalic.ReplaceAllString(msg, "<i>$1</i>")
msg = bbcodeUnderline.ReplaceAllString(msg, "<u>$1</u>")
msg = bbcodeStrikethrough.ReplaceAllString(msg, "<s>$1</s>")
msg = bbcodeURL.ReplaceAllString(msg, "<a href=''$1$2//$3' rel='nofollow'>$1$2//$3</i>")
msg = bbcodeURLLabel.ReplaceAllString(msg, "<a href=''$1$2//$3' rel='nofollow'>$4</i>")
msg = bbcodeQuotes.ReplaceAllString(msg, "<span class='postQuote'>$1</span>")
//msg = bbcodeCode.ReplaceAllString(msg,"<span class='codequotes'>$1</span>")
return msg
}
// Only does the simple BBCode like [u], [b], [i] and [s]
func bbcodeSimpleParse(msg string) string {
var hasU, hasB, hasI, hasS bool
msgbytes := []byte(msg)
for i := 0; (i + 2) < len(msgbytes); i++ {
if msgbytes[i] == '[' && msgbytes[i+2] == ']' {
if msgbytes[i+1] == 'b' && !hasB {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasB = true
} else if msgbytes[i+1] == 'i' && !hasI {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasI = true
} else if msgbytes[i+1] == 'u' && !hasU {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasU = true
} else if msgbytes[i+1] == 's' && !hasS {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasS = true
}
i += 2
}
}
// There's an unclosed tag in there x.x
if hasI || hasU || hasB || hasS {
closeUnder := []byte("</u>")
closeItalic := []byte("</i>")
closeBold := []byte("</b>")
closeStrike := []byte("</s>")
if hasI {
msgbytes = append(msgbytes, closeItalic...)
}
if hasU {
msgbytes = append(msgbytes, closeUnder...)
}
if hasB {
msgbytes = append(msgbytes, closeBold...)
}
if hasS {
msgbytes = append(msgbytes, closeStrike...)
}
}
return string(msgbytes)
}
// Here for benchmarking purposes. Might add a plugin setting for disabling [code] as it has it's paws everywhere
func bbcodeParseWithoutCode(msg string) string {
var hasU, hasB, hasI, hasS bool
var complexBbc bool
msgbytes := []byte(msg)
for i := 0; (i + 3) < len(msgbytes); i++ {
if msgbytes[i] == '[' {
if msgbytes[i+2] != ']' {
if msgbytes[i+1] == '/' {
if msgbytes[i+3] == ']' {
if msgbytes[i+2] == 'b' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasB = false
} else if msgbytes[i+2] == 'i' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasI = false
} else if msgbytes[i+2] == 'u' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasU = false
} else if msgbytes[i+2] == 's' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasS = false
}
i += 3
} else {
complexBbc = true
}
} else {
complexBbc = true
}
} else {
if msgbytes[i+1] == 'b' && !hasB {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasB = true
} else if msgbytes[i+1] == 'i' && !hasI {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasI = true
} else if msgbytes[i+1] == 'u' && !hasU {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasU = true
} else if msgbytes[i+1] == 's' && !hasS {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasS = true
}
i += 2
}
}
}
// There's an unclosed tag in there x.x
if hasI || hasU || hasB || hasS {
closeUnder := []byte("</u>")
closeItalic := []byte("</i>")
closeBold := []byte("</b>")
closeStrike := []byte("</s>")
if hasI {
msgbytes = append(bytes.TrimSpace(msgbytes), closeItalic...)
}
if hasU {
msgbytes = append(bytes.TrimSpace(msgbytes), closeUnder...)
}
if hasB {
msgbytes = append(bytes.TrimSpace(msgbytes), closeBold...)
}
if hasS {
msgbytes = append(bytes.TrimSpace(msgbytes), closeStrike...)
}
}
// Copy the new complex parser over once the rough edges have been smoothed over
if complexBbc {
msg = string(msgbytes)
msg = bbcodeURL.ReplaceAllString(msg, "<a href='$1$2//$3' rel='nofollow'>$1$2//$3</i>")
msg = bbcodeURLLabel.ReplaceAllString(msg, "<a href='$1$2//$3' rel='nofollow'>$4</i>")
msg = bbcodeQuotes.ReplaceAllString(msg, "<span class='postQuote'>$1</span>")
return bbcodeCode.ReplaceAllString(msg, "<span class='codequotes'>$1</span>")
}
return string(msgbytes)
}
// Does every type of BBCode
func bbcodeFullParse(msg string) string {
var hasU, hasB, hasI, hasS, hasC bool
var complexBbc bool
msgbytes := []byte(msg)
msgbytes = append(msgbytes, spaceGap...)
//log.Print("BBCode Simple Pre:","`"+string(msgbytes)+"`")
//log.Print("----")
for i := 0; i < len(msgbytes); i++ {
if msgbytes[i] == '[' {
if msgbytes[i+2] != ']' {
if msgbytes[i+1] == '/' {
if msgbytes[i+3] == ']' {
if !hasC {
if msgbytes[i+2] == 'b' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasB = false
} else if msgbytes[i+2] == 'i' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasI = false
} else if msgbytes[i+2] == 'u' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasU = false
} else if msgbytes[i+2] == 's' {
msgbytes[i] = '<'
msgbytes[i+3] = '>'
hasS = false
}
i += 3
}
} else {
if msgbytes[i+2] == 'c' && msgbytes[i+3] == 'o' && msgbytes[i+4] == 'd' && msgbytes[i+5] == 'e' && msgbytes[i+6] == ']' {
hasC = false
i += 7
}
//if msglen >= (i+6) {
// log.Print("boo")
// log.Print(msglen)
// log.Print(i+6)
// log.Print(string(msgbytes[i:i+6]))
//}
complexBbc = true
}
} else {
if msgbytes[i+1] == 'c' && msgbytes[i+2] == 'o' && msgbytes[i+3] == 'd' && msgbytes[i+4] == 'e' && msgbytes[i+5] == ']' {
hasC = true
i += 6
}
//if msglen >= (i+5) {
// log.Print("boo2: ", string(msgbytes[i:i+5]))
//}
complexBbc = true
}
} else if !hasC {
if msgbytes[i+1] == 'b' && !hasB {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasB = true
} else if msgbytes[i+1] == 'i' && !hasI {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasI = true
} else if msgbytes[i+1] == 'u' && !hasU {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasU = true
} else if msgbytes[i+1] == 's' && !hasS {
msgbytes[i] = '<'
msgbytes[i+2] = '>'
hasS = true
}
i += 2
}
}
}
// There's an unclosed tag in there somewhere x.x
if hasI || hasU || hasB || hasS {
closeUnder := []byte("</u>")
closeItalic := []byte("</i>")
closeBold := []byte("</b>")
closeStrike := []byte("</s>")
if hasI {
msgbytes = append(bytes.TrimSpace(msgbytes), closeItalic...)
}
if hasU {
msgbytes = append(bytes.TrimSpace(msgbytes), closeUnder...)
}
if hasB {
msgbytes = append(bytes.TrimSpace(msgbytes), closeBold...)
}
if hasS {
msgbytes = append(bytes.TrimSpace(msgbytes), closeStrike...)
}
msgbytes = append(msgbytes, spaceGap...)
}
if complexBbc {
i := 0
var start, lastTag int
var outbytes []byte
//log.Print("BBCode Pre:","`"+string(msgbytes)+"`")
//log.Print("----")
for ; i < len(msgbytes); i++ {
if msgbytes[i] == '[' {
if msgbytes[i+1] == 'u' {
if msgbytes[i+2] == 'r' && msgbytes[i+3] == 'l' && msgbytes[i+4] == ']' {
i, start, lastTag, outbytes = bbcodeParseURL(i, start, lastTag, msgbytes, outbytes)
continue
}
} else if msgbytes[i+1] == 'r' {
if bytes.Equal(msgbytes[i+2:i+6], []byte("and]")) {
i, start, lastTag, outbytes = bbcodeParseRand(i, start, lastTag, msgbytes, outbytes)
}
}
}
}
//log.Print("Outbytes:",`"`+string(outbytes)+`"`)
if lastTag != i {
outbytes = append(outbytes, msgbytes[lastTag:]...)
}
if len(outbytes) != 0 {
//log.Print("BBCode Post:",`"`+string(outbytes[0:len(outbytes) - 10])+`"`)
msg = string(outbytes[0 : len(outbytes)-10])
} else {
msg = string(msgbytes[0 : len(msgbytes)-10])
}
//log.Print("----")
//msg = bbcode_url.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$1$2//$3</i>")
msg = bbcodeURLLabel.ReplaceAllString(msg, "<a href='$1$2//$3' rel='nofollow'>$4</i>")
msg = bbcodeQuotes.ReplaceAllString(msg, "<span class='postQuote'>$1</span>")
msg = bbcodeCode.ReplaceAllString(msg, "<span class='codequotes'>$1</span>")
} else {
msg = string(msgbytes[0 : len(msgbytes)-10])
}
return msg
}
func bbcodeParseURL(i int, start int, lastTag int, msgbytes []byte, outbytes []byte) (int, int, int, []byte) {
start = i + 5
outbytes = append(outbytes, msgbytes[lastTag:i]...)
i = start
i += partialURLBytesLen(msgbytes[start:])
//log.Print("Partial Bytes: ", string(msgbytes[start:]))
//log.Print("-----")
if !bytes.Equal(msgbytes[i:i+6], []byte("[/url]")) {
//log.Print("Invalid Bytes: ", string(msgbytes[i:i+6]))
//log.Print("-----")
outbytes = append(outbytes, invalidURL...)
return i, start, lastTag, outbytes
}
outbytes = append(outbytes, urlOpen...)
outbytes = append(outbytes, msgbytes[start:i]...)
outbytes = append(outbytes, urlOpen2...)
outbytes = append(outbytes, msgbytes[start:i]...)
outbytes = append(outbytes, urlClose...)
i += 6
lastTag = i
return i, start, lastTag, outbytes
}
func bbcodeParseRand(i int, start int, lastTag int, msgbytes []byte, outbytes []byte) (int, int, int, []byte) {
outbytes = append(outbytes, msgbytes[lastTag:i]...)
start = i + 6
i = start
for ; ; i++ {
if msgbytes[i] == '[' {
if !bytes.Equal(msgbytes[i+1:i+7], []byte("/rand]")) {
outbytes = append(outbytes, bbcodeMissingTag...)
return i, start, lastTag, outbytes
}
break
} else if (len(msgbytes) - 1) < (i + 10) {
outbytes = append(outbytes, bbcodeMissingTag...)
return i, start, lastTag, outbytes
}
}
number, err := strconv.ParseInt(string(msgbytes[start:i]), 10, 64)
if err != nil {
outbytes = append(outbytes, bbcodeInvalidNumber...)
return i, start, lastTag, outbytes
}
// TODO: Add support for negative numbers?
if number < 0 {
outbytes = append(outbytes, bbcodeNoNegative...)
return i, start, lastTag, outbytes
}
var dat []byte
if number == 0 {
dat = []byte("0")
} else {
dat = []byte(strconv.FormatInt((random.Int63n(number)), 10))
}
outbytes = append(outbytes, dat...)
//log.Print("Outputted the random number")
i += 7
lastTag = i
return i, start, lastTag, outbytes
}