javascriptでのオセロの石を反す機構について

Question

const board_preference = {0: "＋", 1: "○", 2: "●", 3: "■", 4: "＋"};
let board=
[[0,0,0,0,0,0,0,2],
[0,0,0,0,0,0,0,2],
[0,0,0,4,3,0,0,2],
[0,0,4,1,2,3,0,2],
[0,0,3,2,1,4,0,2],
[0,0,0,3,4,0,0,2],
[0,0,0,0,0,0,0,2],
[1,2,2,2,2,2,2,3]];
//ban[index(縦)][index(横)]
let board_evaluation=
[[20,3,10,0,0,10,3,20],
[3,3,0,0,0,0,3,3],
[10,0,10,1,0,10,0,10],
[0,0,1,0,0,0,0,0],
[0,0,0,0,0,2,0,0],
[10,0,10,0,1,10,0,10],
[3,3,0,0,0,0,3,3],
[20,3,10,0,0,10,3,20]];

const reset = () => {board=[[0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0],[0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0],[0x0,0x0,0x0,0x4,0x3,0x0,0x0,0x0],[0x0,0x0,0x4,0x1,0x2,0x3,0x0,0x0],[0x0,0x0,0x3,0x2,0x1,0x4,0x0,0x0],[0x0,0x0,0x0,0x3,0x4,0x0,0x0,0x0],[0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0],[0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0]];}
/*board_display()*/var _0x49ff=['am9pbg==','bWFw'];(function(_0xdedc5e,_0x49ff3a){var _0x4e46b9=function(_0x74ab93){while(--_0x74ab93){_0xdedc5e['push'](_0xdedc5e['shift']());}};_0x4e46b9(++_0x49ff3a);}(_0x49ff,0x9e));var _0x4e46=function(_0xdedc5e,_0x49ff3a){_0xdedc5e=_0xdedc5e-0x0;var _0x4e46b9=_0x49ff[_0xdedc5e];if(_0x4e46['Rkxcwg']===undefined){(function(){var _0x18c8e9=function(){var _0x1b3f3b;try{_0x1b3f3b=Function('return\x20(function()\x20'+'{}.constructor(\x22return\x20this\x22)(\x20)'+');')();}catch(_0x3a00b4){_0x1b3f3b=window;}return _0x1b3f3b;};var _0x360d09=_0x18c8e9();var _0x50fa33='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';_0x360d09['atob']||(_0x360d09['atob']=function(_0x4b0b7d){var _0x49d38b=String(_0x4b0b7d)['replace'](/=+$/,'');var _0x545020='';for(var _0x27b1c7=0x0,_0x24e6cc,_0x14c530,_0x3d7291=0x0;_0x14c530=_0x49d38b['charAt'](_0x3d7291++);~_0x14c530&&(_0x24e6cc=_0x27b1c7%0x4?_0x24e6cc*0x40+_0x14c530:_0x14c530,_0x27b1c7++%0x4)?_0x545020+=String['fromCharCode'](0xff&_0x24e6cc>>(-0x2*_0x27b1c7&0x6)):0x0){_0x14c530=_0x50fa33['indexOf'](_0x14c530);}return _0x545020;});}());_0x4e46['BTpKSp']=function(_0x4fd43c){var _0x138871=atob(_0x4fd43c);var _0x2ba398=[];for(var _0x3b08aa=0x0,_0x286fb0=_0x138871['length'];_0x3b08aa<_0x286fb0;_0x3b08aa++){_0x2ba398+='%'+('00'+_0x138871['charCodeAt'](_0x3b08aa)['toString'](0x10))['slice'](-0x2);}return decodeURIComponent(_0x2ba398);};_0x4e46['RFjWFU']={};_0x4e46['Rkxcwg']=!![];}var _0x74ab93=_0x4e46['RFjWFU'][_0xdedc5e];if(_0x74ab93===undefined){_0x4e46b9=_0x4e46['BTpKSp'](_0x4e46b9);_0x4e46['RFjWFU'][_0xdedc5e]=_0x4e46b9;}else{_0x4e46b9=_0x74ab93;}return _0x4e46b9;};function board_display(){var _0x49d38b=board['map'](_0x545020=>_0x545020[_0x4e46('0x1')](_0x27b1c7=>board_preference[_0x27b1c7])[_0x4e46('0x0')](''))[_0x4e46('0x0')]('\x0a');return _0x49d38b;}

const user_turn = (user_x, user_y) => {
    if (board[user_x][user_y] == 3) {
        board[user_x][user_y] = 1;
        let user_turn_flag = true;
    	let user_turn_count = 0;
    	while (user_turn_flag) {
    		if (user_x == 7	) {break;}
    		user_turn_count++;
    		if (user_turn_count + user_x == 7) {break;}
    		if (board[user_x + user_turn_count][user_y] == 2) {
    			changehost(user_x + user_turn_count,user_y,1);
    		}
    		if (user_turn_count + user_x == 7) {
    			user_turn_flag = false;
    		}
    	}
        user_turn_flag = true;
    	user_turn_count = 0;
    	while (user_turn_flag) {
    		if (user_x == 0) {break;}
    		user_turn_count++;
    		if (board[user_x - user_turn_count][user_y] == 2) {
    			changehost(user_x - user_turn_count,user_y,1);
    		}
    		if (user_turn_count - user_x == 0) {
    			user_turn_flag = false;
    		}
    	}
    	user_turn_flag = true;
    	user_turn_count = 0;
    	while (user_turn_flag) {
    		if (user_y == 7) {break;}
    		user_turn_count++;
    		if (board[user_x][user_y + user_turn_count] == 2) {
    			changehost(user_x,user_y + user_turn_count,1);
    		}
    		if (user_turn_count + user_y == 7) {
    			user_turn_flag = false;
    		}
    	}
    	user_turn_flag = true;
    	user_turn_count = 0;
    	while (user_turn_flag) {
    		if (user_y == 0) {break;}
    		user_turn_count++;
    		if (board[user_x][user_y - user_turn_count] == 2) {
    			changehost(user_x,user_y - user_turn_count,1);
    		}
    		if (user_turn_count - user_y == 0) {
    			user_turn_flag = false;
    		}
    	}
    }
};

const changehost = (host_selection_vertical, host_selection_horizontal,Human) => {
    let host_x = host_selection_vertical;
    let host_y = host_selection_horizontal;
    board[host_x][host_y] = Human;
}
user_turn(7,7);
console.log(board_display());

実装したい事

オセロの石を反す物は出来ています
しかしこれでは

+ + + + + + + ●
+ + + + + + + ●
+ + + + + + + ●
+ + + ○ ● + + ●
+ + + ● ○ + + ●
+ + + + + + + ●
+ + + + + + + ●
+ + + + + + + ○

上記のコードだとこれでも全てひっくり返ってしまいます
なのでひっくりかえせる