vk_msg_rst

function vkRestoreMessages() {
    var box = null;
    var mids = [];
    var proc_offset = 0;
    var cur_offset = 0;
    var abort = false;
    var restored = [];
   var MSG_DEL_REQ_DELAY = 350;
   var MSG_SCAN_REQ_DELAY = 350;
   var deleted_cnt  = 0;
   var restored_cnt = 0;
   var cant_restore_cnt = 0;
   var deleted = [];
   window.dead_messages = [];

   var SCAN_STEP = 1000;
   var fast_messages_get = function(out, offset, count, onDone) {
        var code_body='';
        var code_r=[];
        var steps=Math.ceil(count/100);
        for (var i=0; i<steps;i++){
            var obj={count:count>100?100:count, offset:offset,out:out,preview_length:0};
            code_body+='var x'+i+'=API.messages.get('+JSON.stringify(obj)+');\n';
            code_r.push('x'+i);
            count-=100;
            offset+=100;
        }
        code_body+='\nreturn ['+code_r.join(',')+'];';
        dApi.call('execute',{v:'5.53', code:code_body},function(r){
            var res=[];
         var count = 0;
            var m=r.response;
            for (var i=0;i<m.length;i++){
                count = m[i].count || count;
            if (m[i].items && m[i].items.length>0)
                    res = res.concat(m[i].items)
            }
            onDone({response:{count: count, items: res}});
        });
    }
   var get_dead_message = function(ids, callback){
            dApi.call('messages.getById', {
                message_ids : ids,
            preview_length:0,
            v:'5.53'
            },{
            ok:function (r) {
               if (r.response && r.response.items && r.response.items.length > 0) {
                  for (var i = 0; i< r.response.items.length; i++)
                  if (r.response.items[i].deleted == 1) //ignore msg in spam
                     dead_messages.push(r.response.items[i]);
                  console.log(r.response.items);
               }
               setTimeout(callback, MSG_DEL_REQ_DELAY);
            },
            error: function(){
               setTimeout(callback, MSG_DEL_REQ_DELAY);
               //restored.push(ids_part.join(',') + ' - fail');
            }
         });
   }
    var restore = function () {
        if (abort)
            return;
        var proc_count = deleted.length;
        var ids_part = deleted.slice(proc_offset, proc_offset + 1);

        ge('vk_scan_msg').innerHTML = vkProgressBar(proc_offset, proc_count, 310, IDL('msgrestore') + ' %')+'<br><br>'+
                                    'restored: <b>' + restored_cnt +'</b><br/>'+
                                    'failed: <b>' + cant_restore_cnt +'</b><br/>'+
                                    'dead_messages: <b>' + dead_messages.length + '</b> <button onclick="save_dead()">save loaded</button><br/>'+
                                    'cur msg id:' + ids_part;
        if (ids_part.length == 0) {
            alert('restored: ' + restored_cnt +'\n'+
               'failed: ' + cant_restore_cnt
               /*restored.join(', ')*/);
            //box.hide();
            vkMsg(IDL('RestoreMessagesDone'), 3000);
        } else
            dApi.call('messages.restore', {
                message_id : ids_part.join(','),
            v:'5.53'
            },{
            ok:function (r) {
               if (r.response == '1') {
                  restored_cnt++;
                  //restored.push(ids_part.join(',') + ' - ok');
               } else {
                  cant_restore_cnt++;
                  //restored.push(ids_part.join(',') + ' - fail');
               }
               proc_offset += 1;
               if (r.response == '1')
                  setTimeout(restore, MSG_DEL_REQ_DELAY);
               else
                  setTimeout(get_dead_message.pbind(ids_part.join(','), restore),MSG_DEL_REQ_DELAY);
            },
            error: function(){
               cant_restore_cnt++;
               proc_offset += 1;
               //setTimeout(restore, MSG_DEL_REQ_DELAY);
               setTimeout(get_dead_message.pbind(ids_part.join(','), restore),MSG_DEL_REQ_DELAY);
               //restored.push(ids_part.join(',') + ' - fail');
            }
         });
    };
   var is_out = 0;

    var scan = function () {
        if (cur_offset == 0)
            ge('vk_scan_msg').innerHTML = vkProgressBar(cur_offset, 2, 310, IDL('msgreq') + ' %');

      fast_messages_get(is_out ? 1 : 0, cur_offset, SCAN_STEP, function(r){
            if (abort)
                return;
            var ms = r.response.items;
         var ms_count = r.response.count;
            var msg_count = ms_count;
            ge('vk_scan_msg').innerHTML = vkProgressBar(cur_offset, msg_count, 310, IDL('msgreq') + ' % ('+(is_out == 1 ? 'outgoing' : 'incoming')+')');
            for (var i = 0; i < ms.length; i++)
                mids.push(ms[i].id);
            if (cur_offset < msg_count /*&& cur_offset < 3000*/) {
                cur_offset += SCAN_STEP;
                setTimeout(scan, MSG_SCAN_REQ_DELAY);
            } else if (is_out == 0){
            is_out = 1;
            cur_offset = 0;
            setTimeout(scan, MSG_SCAN_REQ_DELAY);
         } else {
            var int_sort = function(a,b){
               a = parseInt(a);
               b = parseInt(b);
               return a > b ? 1 : (a < b ? -1 : 0);
            }

            //mids.sort(int_sort);
            //var maxmid = Math.max.apply(this, mids); // RangeError: Maximum call stack size exceeded
            var maxmid = 0;
            console.log('find max in array',mids.length, mids);
            for (var i = 0;i < mids.length; i++)
               maxmid = Math.max(maxmid, mids[i]);
            console.log('max:',maxmid);
            for (var i = 0; i < maxmid; i++) {
               if (mids.indexOf(i) == -1)
                  deleted.push(i);
            }
            console.log('deleted collected. sorting...');
            deleted.sort(int_sort).reverse();
            console.log('max:', maxmid);
            console.log('mids:', mids.reverse());
            console.log('deleted:', deleted);
                restore();
         }
        });
    };
    var run = function () {
        box = new MessageBox({
                title : IDL('ScanMessages'),
                closeButton : true,
                width : "350px"
            });
        box.removeButtons();
        box.addButton(IDL('Cancel'), function (r) {
            abort = true;
            box.hide();
        }, 'no');
        var html = '<div id="vk_scan_msg"></div>';
        box.content(html).show();
        scan();
    }
    vkAlertBox(IDL('ScanMessages'), IDL('msgscanconfirm'), run, true);
}

function save_dead(){
   vkLdr.show();
   FileSaverConnect(function() {
      var blob = new Blob([JSON.stringify(dead_messages,'','  ')], {type: "text/plain;charset=utf-8"});
      vkLdr.hide();
      saveAs(blob, 'dead_messages_'+vk.id+' '+(new Date())+'.json');
   });
}

vkRestoreMessages();