Models.h

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#pragma once
 
#include "Common.h"
 
enum SortType
{
    ASCENDING = 1,
    DESCENDING = 2,
    NONE = 3
};
 
enum FilterOperator
{
    EQUAL = 1,
    GT = 2,
    GE = 3,
    LT = 4,
    LE = 5,
    CONTAINS = 6,
    STARTSWITH = 7,
    ENDSWITH = 8
};
 
class FilterValue
{
public:
    wstring fieldName;
    FilterOperator comparisonOp;
    wstring value;
};
 
class PagerRequest
{
public:
 
    int pageSize;
    __int64 startRowIndex;
    wstring sortBy;
    SortType sortDirection;
    vector<FilterValue> filters;
};
 
class Pager
{
public:
    virtual BOOL GetPage(const PagerRequest& request,
                         const vector<wstring>& columnNames,
                         vector<vector<wstring>>& rows,
                         __int64& totalRowCount) = 0;
 
    virtual ~Pager() {}  // Virtual destructor for proper cleanup
};