398 lines
11 KiB
Go
398 lines
11 KiB
Go
package main
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import (
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"bytes"
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"math/rand"
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"regexp"
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"strconv"
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"time"
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"github.com/Azareal/Gosora/common"
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)
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var bbcodeRandom *rand.Rand
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var bbcodeInvalidNumber []byte
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var bbcodeNoNegative []byte
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var bbcodeMissingTag []byte
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var bbcodeBold *regexp.Regexp
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var bbcodeItalic *regexp.Regexp
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var bbcodeUnderline *regexp.Regexp
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var bbcodeStrikethrough *regexp.Regexp
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var bbcodeURL *regexp.Regexp
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var bbcodeURLLabel *regexp.Regexp
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var bbcodeQuotes *regexp.Regexp
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var bbcodeCode *regexp.Regexp
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func init() {
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common.Plugins.Add(&common.Plugin{UName: "bbcode", Name: "BBCode", Author: "Azareal", URL: "https://github.com/Azareal", Init: initBbcode, Deactivate: deactivateBbcode})
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}
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func initBbcode(plugin *common.Plugin) error {
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plugin.AddHook("parse_assign", bbcodeFullParse)
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bbcodeInvalidNumber = []byte("<span style='color: red;'>[Invalid Number]</span>")
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bbcodeNoNegative = []byte("<span style='color: red;'>[No Negative Numbers]</span>")
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bbcodeMissingTag = []byte("<span style='color: red;'>[Missing Tag]</span>")
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bbcodeBold = regexp.MustCompile(`(?s)\[b\](.*)\[/b\]`)
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bbcodeItalic = regexp.MustCompile(`(?s)\[i\](.*)\[/i\]`)
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bbcodeUnderline = regexp.MustCompile(`(?s)\[u\](.*)\[/u\]`)
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bbcodeStrikethrough = regexp.MustCompile(`(?s)\[s\](.*)\[/s\]`)
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urlpattern := `(http|https|ftp|mailto*)(:??)\/\/([\.a-zA-Z\/]+)`
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bbcodeURL = regexp.MustCompile(`\[url\]` + urlpattern + `\[/url\]`)
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bbcodeURLLabel = regexp.MustCompile(`(?s)\[url=` + urlpattern + `\](.*)\[/url\]`)
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bbcodeQuotes = regexp.MustCompile(`\[quote\](.*)\[/quote\]`)
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bbcodeCode = regexp.MustCompile(`\[code\](.*)\[/code\]`)
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bbcodeRandom = rand.New(rand.NewSource(time.Now().UnixNano()))
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return nil
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}
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func deactivateBbcode(plugin *common.Plugin) {
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plugin.RemoveHook("parse_assign", bbcodeFullParse)
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}
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func bbcodeRegexParse(msg string) string {
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msg = bbcodeBold.ReplaceAllString(msg, "<b>$1</b>")
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msg = bbcodeItalic.ReplaceAllString(msg, "<i>$1</i>")
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msg = bbcodeUnderline.ReplaceAllString(msg, "<u>$1</u>")
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msg = bbcodeStrikethrough.ReplaceAllString(msg, "<s>$1</s>")
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msg = bbcodeURL.ReplaceAllString(msg, "<a href=''$1$2//$3' rel='nofollow'>$1$2//$3</i>")
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msg = bbcodeURLLabel.ReplaceAllString(msg, "<a href=''$1$2//$3' rel='nofollow'>$4</i>")
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msg = bbcodeQuotes.ReplaceAllString(msg, "<blockquote>$1</blockquote>")
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//msg = bbcodeCode.ReplaceAllString(msg,"<span class='codequotes'>$1</span>")
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return msg
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}
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// Only does the simple BBCode like [u], [b], [i] and [s]
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func bbcodeSimpleParse(msg string) string {
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var hasU, hasB, hasI, hasS bool
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msgbytes := []byte(msg)
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for i := 0; (i + 2) < len(msgbytes); i++ {
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if msgbytes[i] == '[' && msgbytes[i+2] == ']' {
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if msgbytes[i+1] == 'b' && !hasB {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasB = true
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} else if msgbytes[i+1] == 'i' && !hasI {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasI = true
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} else if msgbytes[i+1] == 'u' && !hasU {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasU = true
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} else if msgbytes[i+1] == 's' && !hasS {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasS = true
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}
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i += 2
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}
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}
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// There's an unclosed tag in there x.x
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if hasI || hasU || hasB || hasS {
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closeUnder := []byte("</u>")
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closeItalic := []byte("</i>")
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closeBold := []byte("</b>")
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closeStrike := []byte("</s>")
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if hasI {
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msgbytes = append(msgbytes, closeItalic...)
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}
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if hasU {
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msgbytes = append(msgbytes, closeUnder...)
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}
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if hasB {
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msgbytes = append(msgbytes, closeBold...)
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}
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if hasS {
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msgbytes = append(msgbytes, closeStrike...)
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}
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}
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return string(msgbytes)
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}
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// Here for benchmarking purposes. Might add a plugin setting for disabling [code] as it has it's paws everywhere
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func bbcodeParseWithoutCode(msg string) string {
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var hasU, hasB, hasI, hasS bool
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var complexBbc bool
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msgbytes := []byte(msg)
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for i := 0; (i + 3) < len(msgbytes); i++ {
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if msgbytes[i] == '[' {
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if msgbytes[i+2] != ']' {
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if msgbytes[i+1] == '/' {
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if msgbytes[i+3] == ']' {
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if msgbytes[i+2] == 'b' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasB = false
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} else if msgbytes[i+2] == 'i' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasI = false
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} else if msgbytes[i+2] == 'u' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasU = false
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} else if msgbytes[i+2] == 's' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasS = false
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}
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i += 3
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} else {
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complexBbc = true
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}
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} else {
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complexBbc = true
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}
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} else {
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if msgbytes[i+1] == 'b' && !hasB {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasB = true
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} else if msgbytes[i+1] == 'i' && !hasI {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasI = true
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} else if msgbytes[i+1] == 'u' && !hasU {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasU = true
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} else if msgbytes[i+1] == 's' && !hasS {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasS = true
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}
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i += 2
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}
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}
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}
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// There's an unclosed tag in there x.x
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if hasI || hasU || hasB || hasS {
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closeUnder := []byte("</u>")
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closeItalic := []byte("</i>")
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closeBold := []byte("</b>")
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closeStrike := []byte("</s>")
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if hasI {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeItalic...)
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}
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if hasU {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeUnder...)
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}
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if hasB {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeBold...)
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}
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if hasS {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeStrike...)
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}
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}
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// Copy the new complex parser over once the rough edges have been smoothed over
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if complexBbc {
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msg = string(msgbytes)
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msg = bbcodeURL.ReplaceAllString(msg, "<a href='$1$2//$3' rel='nofollow'>$1$2//$3</i>")
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msg = bbcodeURLLabel.ReplaceAllString(msg, "<a href='$1$2//$3' rel='nofollow'>$4</i>")
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msg = bbcodeQuotes.ReplaceAllString(msg, "<blockquote>$1</blockquote>")
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return bbcodeCode.ReplaceAllString(msg, "<span class='codequotes'>$1</span>")
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}
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return string(msgbytes)
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}
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// Does every type of BBCode
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func bbcodeFullParse(msg string) string {
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var hasU, hasB, hasI, hasS, hasC bool
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var complexBbc bool
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msgbytes := []byte(msg)
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msgbytes = append(msgbytes, common.SpaceGap...)
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for i := 0; i < len(msgbytes); i++ {
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if msgbytes[i] == '[' {
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if msgbytes[i+2] != ']' {
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if msgbytes[i+1] == '/' {
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if msgbytes[i+3] == ']' {
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if !hasC {
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if msgbytes[i+2] == 'b' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasB = false
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} else if msgbytes[i+2] == 'i' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasI = false
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} else if msgbytes[i+2] == 'u' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasU = false
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} else if msgbytes[i+2] == 's' {
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msgbytes[i] = '<'
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msgbytes[i+3] = '>'
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hasS = false
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}
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i += 3
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}
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} else {
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if msgbytes[i+2] == 'c' && msgbytes[i+3] == 'o' && msgbytes[i+4] == 'd' && msgbytes[i+5] == 'e' && msgbytes[i+6] == ']' {
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hasC = false
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i += 7
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}
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complexBbc = true
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}
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} else {
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if msgbytes[i+1] == 'c' && msgbytes[i+2] == 'o' && msgbytes[i+3] == 'd' && msgbytes[i+4] == 'e' && msgbytes[i+5] == ']' {
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hasC = true
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i += 6
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}
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complexBbc = true
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}
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} else if !hasC {
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if msgbytes[i+1] == 'b' && !hasB {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasB = true
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} else if msgbytes[i+1] == 'i' && !hasI {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasI = true
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} else if msgbytes[i+1] == 'u' && !hasU {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasU = true
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} else if msgbytes[i+1] == 's' && !hasS {
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msgbytes[i] = '<'
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msgbytes[i+2] = '>'
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hasS = true
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}
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i += 2
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}
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}
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}
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// There's an unclosed tag in there somewhere x.x
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if hasI || hasU || hasB || hasS {
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closeUnder := []byte("</u>")
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closeItalic := []byte("</i>")
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closeBold := []byte("</b>")
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closeStrike := []byte("</s>")
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if hasI {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeItalic...)
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}
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if hasU {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeUnder...)
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}
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if hasB {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeBold...)
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}
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if hasS {
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msgbytes = append(bytes.TrimSpace(msgbytes), closeStrike...)
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}
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msgbytes = append(msgbytes, common.SpaceGap...)
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}
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if complexBbc {
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i := 0
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var start, lastTag int
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var outbytes []byte
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for ; i < len(msgbytes); i++ {
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if msgbytes[i] == '[' {
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if msgbytes[i+1] == 'u' {
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if msgbytes[i+2] == 'r' && msgbytes[i+3] == 'l' && msgbytes[i+4] == ']' {
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i, start, lastTag, outbytes = bbcodeParseURL(i, start, lastTag, msgbytes, outbytes)
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continue
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}
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} else if msgbytes[i+1] == 'r' {
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if bytes.Equal(msgbytes[i+2:i+6], []byte("and]")) {
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i, start, lastTag, outbytes = bbcodeParseRand(i, start, lastTag, msgbytes, outbytes)
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}
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}
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}
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}
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if lastTag != i {
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outbytes = append(outbytes, msgbytes[lastTag:]...)
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}
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if len(outbytes) != 0 {
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msg = string(outbytes[0 : len(outbytes)-10])
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} else {
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msg = string(msgbytes[0 : len(msgbytes)-10])
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}
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//msg = bbcode_url.ReplaceAllString(msg,"<a href=\"$1$2//$3\" rel=\"nofollow\">$1$2//$3</i>")
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msg = bbcodeURLLabel.ReplaceAllString(msg, "<a href='$1$2//$3' rel='nofollow'>$4</i>")
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msg = bbcodeQuotes.ReplaceAllString(msg, "<blockquote>$1</blockquote>")
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msg = bbcodeCode.ReplaceAllString(msg, "<span class='codequotes'>$1</span>")
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} else {
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msg = string(msgbytes[0 : len(msgbytes)-10])
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}
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return msg
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}
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// TODO: Strip the containing [url] so the media parser can work it's magic instead? Or do we want to allow something like [url=]label[/url] here?
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func bbcodeParseURL(i int, start int, lastTag int, msgbytes []byte, outbytes []byte) (int, int, int, []byte) {
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start = i + 5
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outbytes = append(outbytes, msgbytes[lastTag:i]...)
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i = start
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i += common.PartialURLStringLen(string(msgbytes[start:]))
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if !bytes.Equal(msgbytes[i:i+6], []byte("[/url]")) {
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outbytes = append(outbytes, common.InvalidURL...)
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return i, start, lastTag, outbytes
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}
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outbytes = append(outbytes, common.URLOpen...)
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outbytes = append(outbytes, msgbytes[start:i]...)
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outbytes = append(outbytes, common.URLOpen2...)
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outbytes = append(outbytes, msgbytes[start:i]...)
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outbytes = append(outbytes, common.URLClose...)
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i += 6
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lastTag = i
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return i, start, lastTag, outbytes
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}
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func bbcodeParseRand(i int, start int, lastTag int, msgbytes []byte, outbytes []byte) (int, int, int, []byte) {
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outbytes = append(outbytes, msgbytes[lastTag:i]...)
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start = i + 6
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i = start
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for ; ; i++ {
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if msgbytes[i] == '[' {
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if !bytes.Equal(msgbytes[i+1:i+7], []byte("/rand]")) {
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outbytes = append(outbytes, bbcodeMissingTag...)
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return i, start, lastTag, outbytes
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}
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break
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} else if (len(msgbytes) - 1) < (i + 10) {
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outbytes = append(outbytes, bbcodeMissingTag...)
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return i, start, lastTag, outbytes
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}
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}
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number, err := strconv.ParseInt(string(msgbytes[start:i]), 10, 64)
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if err != nil {
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outbytes = append(outbytes, bbcodeInvalidNumber...)
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return i, start, lastTag, outbytes
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}
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// TODO: Add support for negative numbers?
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if number < 0 {
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outbytes = append(outbytes, bbcodeNoNegative...)
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return i, start, lastTag, outbytes
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}
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var dat []byte
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if number == 0 {
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dat = []byte("0")
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} else {
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dat = []byte(strconv.FormatInt((bbcodeRandom.Int63n(number)), 10))
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}
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outbytes = append(outbytes, dat...)
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i += 7
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lastTag = i
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return i, start, lastTag, outbytes
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}
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