public class ReallocateTasksCntrl {

    // fetch tasks record from database
    @AuraEnabled
    public static List<taskWrapperCls> fetchTasks(){
        List<taskWrapperCls> taskList = new List<taskWrapperCls>();
        for(Task t:[select Id,Subject,Status,owner.Name,OwnerId,ActivityDate,description,What.Name,What.Id,Priority from Task where Status!='Completed']){
            String firstChr = t.Subject.substring(0,1).toUpperCase();
            taskList.add(new taskWrapperCls(false,t,firstChr));
        }
        return taskList;
    }
    // filter task records
    @AuraEnabled
    public static List<taskWrapperCls> filterTask(string searchKey){
        system.debug('Search Key = '+searchKey);
        List<taskWrapperCls> filteredList = new List<taskWrapperCls>();
        String SString ='Completed';
        String statusValue = '\''+ SString + '\'';
        String queryCol = 'Select Id,Subject,Status,owner.Name,OwnerId,ActivityDate,description,What.Name,What.Id,Priority from Task';
        String sQueryWhere1 = ' where Status !='+statusValue;
        String sQueryWhere2 = ' and ActivityDate ='+searchKey;

        String finalQuery;
        if(searchKey == 'all'){
            finalQuery = queryCol + sQueryWhere1;
        }
        else{
            finalQuery =  queryCol + sQueryWhere1 + sQueryWhere2;
        }
        //like \''+ '%' + String.escapeSingleQuotes(searchKey).replace('*','%')  + '%\''
        system.debug('Query String = '+finalQuery);
        List<Task> taskList = Database.query(finalQuery);
        system.debug('tasks: '+taskList);
        for(Task tsk: taskList){
            String firstChr = tsk.Subject.substring(0,1).toUpperCase();
            filteredList.add(new taskWrapperCls(false,tsk,firstChr));
        }
        system.debug('filtered Records: '+filteredList);
        return filteredList;
    }
    // fetch users from database
    @AuraEnabled
    public static List<userWrapperCls> fetchUsers(){
        List<userWrapperCls> userList = new List<userWrapperCls>();
        for(User u:[select id,Name,email,Phone from user ]){
            String firstChr = u.Name.substring(0,1).toUpperCase();
            userList.add(new userWrapperCls(u,firstChr));
        }
        system.debug('user List: '+userList);
        return userList;
    }

    @AuraEnabled
    public static void TaskTransfer(List<string> tasksRec, string userId){
        system.debug('taskRecs : '+tasksRec);
        system.debug('userId : '+userId);
        List<Task> taskForUpdate = new List<Task>();
        for(Task t:[select id,ownerId from Task where Id IN: tasksRec]){
            t.OwnerId = userId;
            taskForUpdate.add(t);
        }

        if(taskForUpdate.size()>0){
            update taskForUpdate;
        }
    }
    public class taskWrapperCls{
        @AuraEnabled
        public Boolean isSelected;
        @AuraEnabled
        public Task taskRec;
        @AuraEnabled
        public String firstChar;
        public taskWrapperCls(Boolean isSelected, Task taskRec,String firstChar){
            this.isSelected = isSelected;
            this.taskRec = taskRec;
            this.firstChar = firstChar;
        }
    }
    public class userWrapperCls{

        @AuraEnabled
        public User userRec;
        @AuraEnabled
        public String firstChar;

        public userWrapperCls(User userRec,String firstChar){
            this.userRec = userRec;
            this.firstChar = firstChar;
        }
    }
}