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// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import Constants from 'utils/constants.jsx';
const TYPE_POST = 'post';
const TYPE_COMMENT = 'comment';
class MessageHistoryStoreClass {
constructor() {
this.messageHistory = [];
this.index = [];
this.index[TYPE_POST] = 0;
this.index[TYPE_COMMENT] = 0;
}
getMessageInHistory(type) {
if (this.index[type] >= this.messageHistory.length) {
return '';
} else if (this.index[type] < 0) {
return null;
}
return this.messageHistory[this.index[type]];
}
getHistoryLength() {
if (this.messageHistory === null) {
return 0;
}
return this.messageHistory.length;
}
storeMessageInHistory(message) {
this.messageHistory.push(message);
this.resetAllHistoryIndex();
if (this.messageHistory.length > Constants.MAX_PREV_MSGS) {
this.messageHistory = this.messageHistory.slice(1, Constants.MAX_PREV_MSGS + 1);
}
}
storeMessageInHistoryByIndex(index, message) {
this.messageHistory[index] = message;
}
resetAllHistoryIndex() {
this.index[TYPE_POST] = this.messageHistory.length;
this.index[TYPE_COMMENT] = this.messageHistory.length;
}
resetHistoryIndex(type) {
this.index[type] = this.messageHistory.length;
}
nextMessageInHistory(keyCode, messageText, type) {
if (messageText !== '' && messageText !== this.getMessageInHistory(type)) {
return null;
}
if (keyCode === Constants.KeyCodes.UP) {
this.index[type]--;
} else if (keyCode === Constants.KeyCodes.DOWN) {
this.index[type]++;
}
if (this.index[type] < 0) {
this.index[type] = 0;
return null;
} else if (this.index[type] >= this.getHistoryLength()) {
this.index[type] = this.getHistoryLength();
}
return this.getMessageInHistory(type);
}
}
var MessageHistoryStore = new MessageHistoryStoreClass();
export default MessageHistoryStore;
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