116 lines
3.9 KiB
Go
116 lines
3.9 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package text
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import (
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"context"
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"fmt"
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"html"
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"strings"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/util"
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)
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// preformat contains some common logic for making a string ready for formatting, which should be used for all user-input text.
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func preformat(in string) string {
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// do some preformatting of the text
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// 1. unescape everything that might be html escaped
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s := html.UnescapeString(in)
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// 2. trim leading or trailing whitespace
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s = strings.TrimSpace(s)
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return s
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}
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// postformat contains some common logic for html sanitization of text, wrapping elements, and trimming newlines and whitespace
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func postformat(in string) string {
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// do some postformatting of the text
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// 1. sanitize html to remove potentially dangerous elements
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s := SanitizeHTML(in)
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// 2. the sanitize step tends to escape characters inside codeblocks, which is behavior we don't want, so unescape everything again
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s = html.UnescapeString(s)
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// 3. minify html to remove any trailing newlines, spaces, unnecessary elements, etc etc
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mini, err := minifyHTML(s)
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if err != nil {
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// if the minify failed, just return what we have
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return s
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}
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// return minified version of the html
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return mini
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}
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func (f *formatter) ReplaceTags(ctx context.Context, in string, tags []*gtsmodel.Tag) string {
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return util.HashtagFinderRegex.ReplaceAllStringFunc(in, func(match string) string {
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// we have a match
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matchTrimmed := strings.TrimSpace(match)
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tagAsEntered := strings.Split(matchTrimmed, "#")[1]
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// check through the tags to find what we're matching
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for _, tag := range tags {
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if strings.EqualFold(matchTrimmed, fmt.Sprintf("#%s", tag.Name)) {
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// replace the #tag with the formatted tag content
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tagContent := fmt.Sprintf(`<a href="%s" class="mention hashtag" rel="tag">#<span>%s</span></a>`, tag.URL, tagAsEntered)
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// in case the match picked up any previous space or newlines (thanks to the regex), include them as well
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if strings.HasPrefix(match, " ") {
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tagContent = " " + tagContent
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} else if strings.HasPrefix(match, "\n") {
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tagContent = "\n" + tagContent
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}
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// done
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return tagContent
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}
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}
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// the match wasn't in the list of tags for whatever reason, so just return the match as we found it so nothing changes
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return match
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})
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}
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func (f *formatter) ReplaceMentions(ctx context.Context, in string, mentions []*gtsmodel.Mention) string {
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for _, menchie := range mentions {
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// make sure we have a target account, either by getting one pinned on the mention,
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// or by pulling it from the database
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var targetAccount *gtsmodel.Account
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if menchie.OriginAccount != nil {
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// got it from the mention
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targetAccount = menchie.OriginAccount
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} else {
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a, err := f.db.GetAccountByID(ctx, menchie.TargetAccountID)
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if err == nil {
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// got it from the db
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targetAccount = a
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} else {
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// couldn't get it so we can't do replacement
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return in
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}
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}
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mentionContent := fmt.Sprintf(`<span class="h-card"><a href="%s" class="u-url mention">@<span>%s</span></a></span>`, targetAccount.URL, targetAccount.Username)
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in = strings.ReplaceAll(in, menchie.NameString, mentionContent)
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}
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return in
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}
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