97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
package gomatrix
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import (
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"fmt"
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"regexp"
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"strings"
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"golang.org/x/net/html"
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)
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var HTMLReplyFallbackRegex = regexp.MustCompile(`^<mx-reply>[\s\S]+?</mx-reply>`)
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func TrimReplyFallbackHTML(html string) string {
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return HTMLReplyFallbackRegex.ReplaceAllString(html, "")
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}
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func TrimReplyFallbackText(text string) string {
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if !strings.HasPrefix(text, "> ") || !strings.Contains(text, "\n") {
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return text
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}
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lines := strings.Split(text, "\n")
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for len(lines) > 0 && strings.HasPrefix(lines[0], "> ") {
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lines = lines[1:]
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}
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return strings.TrimSpace(strings.Join(lines, "\n"))
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}
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func (content *Content) RemoveReplyFallback() {
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if len(content.GetReplyTo()) > 0 {
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if content.Format == FormatHTML {
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content.FormattedBody = TrimReplyFallbackHTML(content.FormattedBody)
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}
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content.Body = TrimReplyFallbackText(content.Body)
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}
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}
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func (content *Content) GetReplyTo() string {
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if content.RelatesTo != nil {
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return content.RelatesTo.InReplyTo.EventID
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}
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return ""
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}
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const ReplyFormat = `<mx-reply><blockquote>
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<a href="https://matrix.to/#/%s/%s">In reply to</a>
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<a href="https://matrix.to/#/%s">%s</a>
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%s
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</blockquote></mx-reply>
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`
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func (evt *Event) GenerateReplyFallbackHTML() string {
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body := evt.Content.FormattedBody
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if len(body) == 0 {
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body = html.EscapeString(evt.Content.Body)
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}
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senderDisplayName := evt.Sender
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return fmt.Sprintf(ReplyFormat, evt.RoomID, evt.ID, evt.Sender, senderDisplayName, body)
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}
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func (evt *Event) GenerateReplyFallbackText() string {
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body := evt.Content.Body
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lines := strings.Split(strings.TrimSpace(body), "\n")
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firstLine, lines := lines[0], lines[1:]
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senderDisplayName := evt.Sender
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var fallbackText strings.Builder
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fmt.Fprintf(&fallbackText, "> <%s> %s", senderDisplayName, firstLine)
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for _, line := range lines {
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fmt.Fprintf(&fallbackText, "\n> %s", line)
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}
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fallbackText.WriteString("\n\n")
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return fallbackText.String()
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}
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func (content *Content) SetReply(inReplyTo *Event) {
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if content.RelatesTo == nil {
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content.RelatesTo = &RelatesTo{}
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}
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content.RelatesTo.InReplyTo = InReplyTo{
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EventID: inReplyTo.ID,
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RoomID: inReplyTo.RoomID,
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}
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if content.MsgType == MsgText || content.MsgType == MsgNotice {
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if len(content.FormattedBody) == 0 || content.Format != FormatHTML {
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content.FormattedBody = html.EscapeString(content.Body)
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content.Format = FormatHTML
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}
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content.FormattedBody = inReplyTo.GenerateReplyFallbackHTML() + content.FormattedBody
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content.Body = inReplyTo.GenerateReplyFallbackText() + content.Body
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}
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}
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