118 lines
3.9 KiB
Go
118 lines
3.9 KiB
Go
/*
|
|
GoToSocial
|
|
Copyright (C) 2021 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 (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// DeriveMentionsFromStatus takes a plaintext (ie., not html-formatted) status,
|
|
// and applies a regex to it to return a deduplicated list of accounts
|
|
// mentioned in that status.
|
|
//
|
|
// It will look for fully-qualified account names in the form "@user@example.org".
|
|
// or the form "@username" for local users.
|
|
// The case of the returned mentions will be lowered, for consistency.
|
|
func DeriveMentionsFromStatus(status string) []string {
|
|
mentionedAccounts := []string{}
|
|
for _, m := range mentionFinderRegex.FindAllStringSubmatch(status, -1) {
|
|
mentionedAccounts = append(mentionedAccounts, m[1])
|
|
}
|
|
return lower(unique(mentionedAccounts))
|
|
}
|
|
|
|
// DeriveHashtagsFromStatus takes a plaintext (ie., not html-formatted) status,
|
|
// and applies a regex to it to return a deduplicated list of hashtags
|
|
// used in that status, without the leading #. The case of the returned
|
|
// tags will be lowered, for consistency.
|
|
func DeriveHashtagsFromStatus(status string) []string {
|
|
tags := []string{}
|
|
for _, m := range hashtagFinderRegex.FindAllStringSubmatch(status, -1) {
|
|
tags = append(tags, m[1])
|
|
}
|
|
return lower(unique(tags))
|
|
}
|
|
|
|
// DeriveEmojisFromStatus takes a plaintext (ie., not html-formatted) status,
|
|
// and applies a regex to it to return a deduplicated list of emojis
|
|
// used in that status, without the surround ::. The case of the returned
|
|
// emojis will be lowered, for consistency.
|
|
func DeriveEmojisFromStatus(status string) []string {
|
|
emojis := []string{}
|
|
for _, m := range emojiFinderRegex.FindAllStringSubmatch(status, -1) {
|
|
emojis = append(emojis, m[1])
|
|
}
|
|
return lower(unique(emojis))
|
|
}
|
|
|
|
// ExtractMentionParts extracts the username test_user and the domain example.org
|
|
// from a mention string like @test_user@example.org.
|
|
//
|
|
// If nothing is matched, it will return an error.
|
|
func ExtractMentionParts(mention string) (username, domain string, err error) {
|
|
matches := mentionNameRegex.FindStringSubmatch(mention)
|
|
if matches == nil || len(matches) != 3 {
|
|
err = fmt.Errorf("could't match mention %s", mention)
|
|
return
|
|
}
|
|
username = matches[1]
|
|
domain = matches[2]
|
|
return
|
|
}
|
|
|
|
// IsMention returns true if the passed string looks like @whatever@example.org
|
|
func IsMention(mention string) bool {
|
|
return mentionNameRegex.MatchString(strings.ToLower(mention))
|
|
}
|
|
|
|
// unique returns a deduplicated version of a given string slice.
|
|
func unique(s []string) []string {
|
|
keys := make(map[string]bool)
|
|
list := []string{}
|
|
for _, entry := range s {
|
|
if _, value := keys[entry]; !value {
|
|
keys[entry] = true
|
|
list = append(list, entry)
|
|
}
|
|
}
|
|
return list
|
|
}
|
|
|
|
// lower lowercases all strings in a given string slice
|
|
func lower(s []string) []string {
|
|
new := []string{}
|
|
for _, i := range s {
|
|
new = append(new, strings.ToLower(i))
|
|
}
|
|
return new
|
|
}
|
|
|
|
// HTMLFormat takes a plaintext formatted status string, and converts it into
|
|
// a nice HTML-formatted string.
|
|
//
|
|
// This includes:
|
|
// - Replacing line-breaks with <p>
|
|
// - Replacing URLs with hrefs.
|
|
// - Replacing mentions with links to that account's URL as stored in the database.
|
|
func HTMLFormat(status string) string {
|
|
// TODO: write proper HTML formatting logic for a status
|
|
return status
|
|
}
|