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gosora/plugin_bbcode.go

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package main
//import "log"
//import "fmt"
import "bytes"
//import "strings"
import "strconv"
import "regexp"
import "time"
import "math/rand"
var random *rand.Rand
var bbcode_invalid_url []byte
var bbcode_invalid_number []byte
var bbcode_missing_tag []byte
var bbcode_url_open []byte
var bbcode_url_open2 []byte
var bbcode_url_close []byte
var bbcode_space_gap []byte
var bbcode_bold *regexp.Regexp
var bbcode_italic *regexp.Regexp
var bbcode_underline *regexp.Regexp
var bbcode_strikethrough *regexp.Regexp
var bbcode_url *regexp.Regexp
var bbcode_url_label *regexp.Regexp
func init() {
plugins["bbcode"] = NewPlugin("bbcode","BBCode","Azareal","http://github.com/Azareal","","","",init_bbcode,nil,deactivate_bbcode)
}
func init_bbcode() {
//plugins["bbcode"].AddHook("parse_assign", bbcode_parse_without_code)
plugins["bbcode"].AddHook("parse_assign", bbcode_full_parse)
bbcode_invalid_url = []byte("<span style='color: red;'>[Invalid URL]</span>")
bbcode_invalid_number = []byte("<span style='color: red;'>[Invalid Number]</span>")
bbcode_missing_tag = []byte("<span style='color: red;'>[Missing Tag]</span>")
bbcode_url_open = []byte("<a href='")
bbcode_url_open2 = []byte("'>")
bbcode_url_close = []byte("</a>")
bbcode_space_gap = []byte(" ")
bbcode_bold = regexp.MustCompile(`(?s)\[b\](.*)\[/b\]`)
bbcode_italic = regexp.MustCompile(`(?s)\[i\](.*)\[/i\]`)
bbcode_underline = regexp.MustCompile(`(?s)\[u\](.*)\[/u\]`)
bbcode_strikethrough = regexp.MustCompile(`(?s)\[s\](.*)\[/s\]`)
urlpattern := `(http|https|ftp|mailto*)(:??)\/\/([\.a-zA-Z\/]+)`
bbcode_url = regexp.MustCompile(`\[url\]` + urlpattern + `\[/url\]`)
bbcode_url_label = regexp.MustCompile(`(?s)\[url=` + urlpattern + `\](.*)\[/url\]`)
random = rand.New(rand.NewSource(time.Now().UnixNano()))
}
func deactivate_bbcode() {
//plugins["bbcode"].RemoveHook("parse_assign", bbcode_parse_without_code)
plugins["bbcode"].RemoveHook("parse_assign", bbcode_full_parse)
}
func bbcode_regex_parse(data interface{}) interface{} {
msg := data.(string)
msg = bbcode_bold.ReplaceAllString(msg,"<b>$1</b>")
msg = bbcode_italic.ReplaceAllString(msg,"<i>$1</i>")
msg = bbcode_underline.ReplaceAllString(msg,"<u>$1</u>")
msg = bbcode_strikethrough.ReplaceAllString(msg,"<s>$1</s>")
msg = bbcode_url.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$1$2//$3</i>")
msg = bbcode_url_label.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$4</i>")
return msg
}
// Only does the simple BBCode like [u], [b], [i] and [s]
func bbcode_simple_parse(data interface{}) interface{} {
msg := data.(string)
msgbytes := []byte(msg)
has_u := false
has_b := false
has_i := false
has_s := false
for i := 0; (i + 2) < len(msgbytes); i++ {
if msgbytes[i] == '[' && msgbytes[i + 2] == ']' {
if msgbytes[i + 1] == 'b' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_b = true
} else if msgbytes[i + 1] == 'i' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_i = true
} else if msgbytes[i + 1] == 'u' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_u = true
} else if msgbytes[i + 1] == 's' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_s = true
}
i += 2
}
}
// There's an unclosed tag in there x.x
if has_i || has_u || has_b || has_s {
closer := []byte("</u></i></b></s>")
msgbytes = append(msgbytes, closer...)
}
return string(msgbytes)
}
// Here for benchmarking purposes. Might add a plugin setting for disabling [code] as it has it's paws everywhere
func bbcode_parse_without_code(data interface{}) interface{} {
msg := data.(string)
msgbytes := []byte(msg)
has_u := false
has_b := false
has_i := false
has_s := false
complex_bbc := false
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] = '>'
has_b = false
} else if msgbytes[i + 2] == 'i' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_i = false
} else if msgbytes[i + 2] == 'u' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_u = false
} else if msgbytes[i + 2] == 's' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_s = false
}
i += 3
} else {
complex_bbc = true
}
} else {
complex_bbc = true
}
} else {
if msgbytes[i + 1] == 'b' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_b = true
} else if msgbytes[i + 1] == 'i' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_i = true
} else if msgbytes[i + 1] == 'u' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_u = true
} else if msgbytes[i + 1] == 's' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_s = true
}
i += 2
}
}
}
// There's an unclosed tag in there x.x
if has_i || has_u || has_b || has_s {
closer := []byte("</u></i></b></s>")
msgbytes = append(msgbytes, closer...)
}
// Copy the new complex parser over once the rough edges have been smoothed over
if complex_bbc {
msg = bbcode_url.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$1$2//$3</i>")
msg = bbcode_url_label.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$4</i>")
}
return string(msgbytes)
}
// Does every type of BBCode
func bbcode_full_parse(data interface{}) interface{} {
msg := data.(string)
msgbytes := []byte(msg)
has_u := false
has_b := false
has_i := false
has_s := false
has_c := false
complex_bbc := false
msgbytes = append(msgbytes,bbcode_space_gap...)
for i := 0; i < len(msgbytes); i++ {
if msgbytes[i] == '[' {
if msgbytes[i + 2] != ']' {
if msgbytes[i + 1] == '/' {
if msgbytes[i + 3] == ']' {
if !has_c {
if msgbytes[i + 2] == 'b' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_b = false
} else if msgbytes[i + 2] == 'i' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_i = false
} else if msgbytes[i + 2] == 'u' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_u = false
} else if msgbytes[i + 2] == 's' {
msgbytes[i] = '<'
msgbytes[i + 3] = '>'
has_s = false
}
i += 3
}
} else {
if msgbytes[i+2] == 'c' && msgbytes[i+3] == 'o' && msgbytes[i+4] == 'd' && msgbytes[i+5] == 'e' && msgbytes[i+6] == ']' {
has_c = false
i += 7
}
//if msglen >= (i+6) {
// fmt.Println("boo")
// fmt.Println(msglen)
// fmt.Println(i+6)
// fmt.Println(string(msgbytes[i:i+6]))
//}
complex_bbc = true
}
} else {
if msgbytes[i+1] == 'c' && msgbytes[i+2] == 'o' && msgbytes[i+3] == 'd' && msgbytes[i+4] == 'e' && msgbytes[i+5] == ']' {
has_c = true
i += 6
}
//if msglen >= (i+5) {
// fmt.Println("boo2")
// fmt.Println(string(msgbytes[i:i+5]))
//}
complex_bbc = true
}
} else if !has_c {
if msgbytes[i + 1] == 'b' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_b = true
} else if msgbytes[i + 1] == 'i' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_i = true
} else if msgbytes[i + 1] == 'u' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_u = true
} else if msgbytes[i + 1] == 's' {
msgbytes[i] = '<'
msgbytes[i + 2] = '>'
has_s = true
}
i += 2
}
}
}
// There's an unclosed tag in there x.x
if has_i || has_u || has_b || has_s {
closer := []byte("</u></i></b></s>")
msgbytes = append(msgbytes, closer...)
}
if complex_bbc {
i := 0
var start int
var lastTag int
outbytes := make([]byte, len(msgbytes))
//fmt.Println(string(msgbytes))
for ; i < len(msgbytes); i++ {
MainLoop:
if msgbytes[i] == '[' {
OuterComplex:
if msgbytes[i + 1] == 'u' {
if msgbytes[i+2] == 'r' && msgbytes[i+3] == 'l' && msgbytes[i+4] == ']' {
outbytes = append(outbytes, msgbytes[lastTag:i]...)
start = i + 5
i = start
if msgbytes[i] == 'h' {
if msgbytes[i+1] == 't' && msgbytes[i+2] == 't' && msgbytes[i+3] == 'p' {
if bytes.Equal(msgbytes[i + 4:i + 7],[]byte("s://")) {
i += 7
} else if msgbytes[i+4] == ':' && msgbytes[i+5] == '/' && msgbytes[i+6] == '/' {
i += 6
} else {
outbytes = append(outbytes, bbcode_invalid_url...)
continue
}
}
} else if msgbytes[i] == 'f' {
if bytes.Equal(msgbytes[i+1:i+5],[]byte("tp://")) {
i += 5
}
}
for ;; i++ {
if len(msgbytes) < (i + 10) {
//fmt.Println(msglen)
//fmt.Println(i+6)
outbytes = append(outbytes, bbcode_missing_tag...)
goto OuterComplex
} else if msgbytes[i] == '[' {
if !bytes.Equal(msgbytes[i+1:i+6],[]byte("/url]")) {
//log.Print("Not the URL closing tag!")
//fmt.Println(msgbytes[i + 1:i + 6])
outbytes = append(outbytes, bbcode_missing_tag...)
goto OuterComplex
}
break
} else if msgbytes[i] != '\\' && msgbytes[i] != '_' && !(msgbytes[i] > 44 && msgbytes[i] < 58) && !(msgbytes[i] > 64 && msgbytes[i] < 91) && !(msgbytes[i] > 96 && msgbytes[i] < 123) {
outbytes = append(outbytes, bbcode_invalid_url...)
//log.Print("Weird character")
//fmt.Println(msgbytes[i])
goto MainLoop
}
}
outbytes = append(outbytes, bbcode_url_open...)
outbytes = append(outbytes, msgbytes[start:i]...)
outbytes = append(outbytes, bbcode_url_open2...)
outbytes = append(outbytes, msgbytes[start:i]...)
outbytes = append(outbytes, bbcode_url_close...)
i += 6
lastTag = i
}
} else if msgbytes[i + 1] == 'r' {
if bytes.Equal(msgbytes[i+2:i+6],[]byte("and]")) {
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, bbcode_missing_tag...)
goto OuterComplex
}
break
} else if (len(msgbytes) - 1) < (i + 10) {
outbytes = append(outbytes, bbcode_missing_tag...)
goto OuterComplex
}
}
number, err := strconv.ParseInt(string(msgbytes[start:i]),10,64)
if err != nil {
outbytes = append(outbytes, bbcode_invalid_number...)
goto MainLoop
}
dat := []byte(strconv.FormatInt((random.Int63n(number)),10))
outbytes = append(outbytes, dat...)
//log.Print("Outputted the random number")
i += 7
lastTag = i
}
}
}
}
//fmt.Println(outbytes)
//fmt.Println(string(outbytes))
if lastTag != i {
outbytes = append(outbytes, msgbytes[lastTag:len(msgbytes) - 10]...)
}
if len(outbytes) != 0 {
return string(outbytes)
}
msg = string(msgbytes)
//msg = bbcode_url.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$1$2//$3</i>")
msg = bbcode_url_label.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$4</i>")
// Convert [code] into class="codequotes"
} else {
msg = string(msgbytes)
}
return msg
}
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