package main
import (
"html/template"
"regexp"
"strings"
"github.com/FChannel0/FChannel-Server/activitypub"
"github.com/FChannel0/FChannel-Server/config"
"github.com/FChannel0/FChannel-Server/db"
"github.com/FChannel0/FChannel-Server/util"
"github.com/FChannel0/FChannel-Server/webfinger"
_ "github.com/lib/pq"
)
func MediaProxy(url string) string {
re := regexp.MustCompile("(.+)?" + config.Domain + "(.+)?")
if re.MatchString(url) {
return url
}
re = regexp.MustCompile("(.+)?\\.onion(.+)?")
if re.MatchString(url) {
return url
}
MediaHashs[util.HashMedia(url)] = url
return "/api/media?hash=" + util.HashMedia(url)
}
func ParseAttachment(obj activitypub.ObjectBase, catalog bool) template.HTML {
// TODO: convert all of these to Sprintf statements, or use strings.Builder or something, anything but this really
// string concatenation is highly inefficient _especially_ when being used like this
if len(obj.Attachment) < 1 {
return ""
}
var media string
if regexp.MustCompile(`image\/`).MatchString(obj.Attachment[0].MediaType) {
media = "![]()
, should also escape &, ", and '
nContent := strings.ReplaceAll(content, `<`, "<")
nContent, err := ParseLinkComments(board, op, nContent, thread)
if err != nil {
return "", err
}
nContent = ParseCommentQuotes(nContent)
nContent = strings.ReplaceAll(nContent, `/\<`, ">")
return template.HTML(nContent), nil
}
func ParseLinkComments(board activitypub.Actor, op string, content string, thread activitypub.ObjectBase) (string, error) {
re := regexp.MustCompile(`(>>(https?://[A-Za-z0-9_.:\-~]+\/[A-Za-z0-9_.\-~]+\/)(f[A-Za-z0-9_.\-~]+-)?([A-Za-z0-9_.\-~]+)?#?([A-Za-z0-9_.\-~]+)?)`)
match := re.FindAllStringSubmatch(content, -1)
//add url to each matched reply
for i, _ := range match {
link := strings.Replace(match[i][0], ">>", "", 1)
isOP := ""
domain := match[i][2]
if link == op {
isOP = " (OP)"
}
parsedLink := ConvertHashLink(domain, link)
//formate the hover title text
var quoteTitle string
// if the quoted content is local get it
// else get it from the database
if thread.Id == link {
quoteTitle = ParseLinkTitle(board.Outbox, op, thread.Content)
} else {
for _, e := range thread.Replies.OrderedItems {
if e.Id == parsedLink {
quoteTitle = ParseLinkTitle(board.Outbox, op, e.Content)
break
}
}
if quoteTitle == "" {
obj, err := activitypub.GetObjectFromDBFromID(parsedLink)
if err != nil {
return "", err
}
if len(obj.OrderedItems) > 0 {
quoteTitle = ParseLinkTitle(board.Outbox, op, obj.OrderedItems[0].Content)
} else {
quoteTitle = ParseLinkTitle(board.Outbox, op, parsedLink)
}
}
}
if replyID, isReply, err := db.IsReplyToOP(op, parsedLink); err == nil || !isReply {
id := util.ShortURL(board.Outbox, replyID)
content = strings.Replace(content, match[i][0], ">>"+id+""+isOP+"", -1)
} else {
//this is a cross post
parsedOP, err := db.GetReplyOP(parsedLink)
if err == nil {
link = parsedOP + "#" + util.ShortURL(parsedOP, parsedLink)
}
actor, err := webfinger.FingerActor(parsedLink)
if err == nil && actor.Id != "" {
content = strings.Replace(content, match[i][0], ">>"+util.ShortURL(board.Outbox, parsedLink)+isOP+" →", -1)
}
}
}
return content, nil
}
func ParseLinkTitle(actorName string, op string, content string) string {
re := regexp.MustCompile(`(>>(https?://[A-Za-z0-9_.:\-~]+\/[A-Za-z0-9_.\-~]+\/)\w+(#.+)?)`)
match := re.FindAllStringSubmatch(content, -1)
for i, _ := range match {
link := strings.Replace(match[i][0], ">>", "", 1)
isOP := ""
domain := match[i][2]
if link == op {
isOP = " (OP)"
}
link = ConvertHashLink(domain, link)
content = strings.Replace(content, match[i][0], ">>"+util.ShortURL(actorName, link)+isOP, 1)
}
// TODO: this drops more than we need to
content = strings.ReplaceAll(content, "'", "")
content = strings.ReplaceAll(content, "\"", "")
content = strings.ReplaceAll(content, ">", `/\<`)
return content
}
func ParseCommentQuotes(content string) string {
// replace quotes
re := regexp.MustCompile(`((\r\n|\r|\n|^)>(.+)?[^\r\n])`)
match := re.FindAllStringSubmatch(content, -1)
for i, _ := range match {
quote := strings.Replace(match[i][0], ">", ">", 1)
line := re.ReplaceAllString(match[i][0], ""+quote+"")
content = strings.Replace(content, match[i][0], line, 1)
}
//replace isolated greater than symboles
re = regexp.MustCompile(`(\r\n|\n|\r)>`)
return re.ReplaceAllString(content, "\r\n>")
}
func ConvertHashLink(domain string, link string) string {
re := regexp.MustCompile(`(#.+)`)
parsedLink := re.FindString(link)
if parsedLink != "" {
parsedLink = domain + "" + strings.Replace(parsedLink, "#", "", 1)
parsedLink = strings.Replace(parsedLink, "\r", "", -1)
} else {
parsedLink = link
}
return parsedLink
}