// SiYuan - Build Your Eternal Digital Garden
// Copyright (c) 2020-present, b3log.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 <https://www.gnu.org/licenses/>.

package util

import "regexp"

var emojiRegex = regexp.MustCompile(`/([0-9#][\x{20E3}])|` +
	`[\x{00ae}\x{00a9}\x{203C}\x{2047}\x{2048}\x{2049}\x{3030}\x{303D}\x{2139}\x{2122}\x{3297}\x{3299}]|` +
	`[\x{2190}-\x{21FF}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{2300}-\x{23FF}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{2460}-\x{24FF}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{25A0}-\x{25FF}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{2600}-\x{27BF}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{2900}-\x{297F}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{2B00}-\x{2BF0}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{1F000}-\x{1F6FF}]|[\x{FE00}-\x{FEFF}]|` +
	`[\x{1F600}-\x{1F64F}]|` +
	`[\x{1F680}-\x{1F6FF}]|` +
	`[\x{1F900}-\x{1F9FF}]|` +
	`[\x{1F1E0}-\x{1F1FF}]|` +
	`[\x{1D100}-\x{1D1FF}]|` +
	`[\x{2600}-\x{26FF}]|` +
	`[\x{2700}-\x{27BF}]|` +
	`[\x{10000}-\x{E01EF}]`)

func RemoveEmoji(text string) string {
	return emojiRegex.ReplaceAllString(text, "")
}
