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/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package util
import (
"strings"
"github.com/superseriousbusiness/gotosocial/internal/regexes"
)
// DeriveMentionNamesFromText takes a plaintext (ie., not html-formatted) text,
// and applies a regex to it to return a deduplicated list of account names
// mentioned in that text, in the format "@user@example.org" or "@username" for
// local users.
func DeriveMentionNamesFromText(text string) []string {
mentionedAccounts := []string{}
for _, m := range regexes.MentionFinder.FindAllStringSubmatch(text, -1) {
mentionedAccounts = append(mentionedAccounts, m[1])
}
return UniqueStrings(mentionedAccounts)
}
// DeriveHashtagsFromText takes a plaintext (ie., not html-formatted) text,
// and applies a regex to it to return a deduplicated list of hashtags
// used in that text, without the leading #. The case of the returned
// tags will be lowered, for consistency.
func DeriveHashtagsFromText(text string) []string {
tags := []string{}
for _, m := range regexes.HashtagFinder.FindAllStringSubmatch(text, -1) {
tags = append(tags, strings.TrimPrefix(m[1], "#"))
}
return UniqueStrings(tags)
}
// DeriveEmojisFromText takes a plaintext (ie., not html-formatted) text,
// and applies a regex to it to return a deduplicated list of emojis
// used in that text, without the surrounding `::`
func DeriveEmojisFromText(text string) []string {
emojis := []string{}
for _, m := range regexes.EmojiFinder.FindAllStringSubmatch(text, -1) {
emojis = append(emojis, m[1])
}
return UniqueStrings(emojis)
}
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