package jnpf.onlinedev.util;
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import jnpf.util.FlowFormConstant;
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import jnpf.util.StringUtil;
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import jnpf.util.TableFeildsEnum;
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import org.mybatis.dynamic.sql.SortSpecification;
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import org.mybatis.dynamic.sql.SqlBuilder;
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import org.mybatis.dynamic.sql.SqlTable;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.function.Predicate;
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/**
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* 流程列表的状态别名映射与排序优先级。
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*/
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public final class WorkflowListSortUtils {
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private WorkflowListSortUtils() {
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}
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public static boolean isFlowStateField(String field) {
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return FlowFormConstant.FLOW_STATE.equalsIgnoreCase(field)
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|| TableFeildsEnum.FLOWSTATE.getField().equalsIgnoreCase(field);
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}
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public static List<SortSpecification> orderBy(String tableName, String flowStateField, String primaryKey,
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boolean enableFlow, String sidx, Predicate<String> isSortableField) {
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String[] sorts = StringUtil.isNotEmpty(sidx) ? sidx.split(",") : new String[0];
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boolean hasStateSort = enableFlow && Arrays.stream(sorts)
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.map(sort -> sort.startsWith("-") ? sort.substring(1) : sort)
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.anyMatch(WorkflowListSortUtils::isFlowStateField);
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SqlTable table = SqlTable.of(tableName);
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List<SortSpecification> result = new ArrayList<>();
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// 未指定状态排序时，保留平台原有的状态升序优先规则。
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if (enableFlow && !hasStateSort) {
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result.add(SqlBuilder.sortColumn(tableName, table.column(flowStateField)));
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}
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for (String sort : sorts) {
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boolean descending = sort.startsWith("-");
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String field = descending ? sort.substring(1) : sort;
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// 系统状态不依赖表单字段，不能被只展示字段过滤规则移除。
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if (enableFlow && isFlowStateField(field)) {
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field = flowStateField;
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} else if (!isSortableField.test(field)) {
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continue;
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}
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SortSpecification specification = SqlBuilder.sortColumn(tableName, table.column(field));
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result.add(descending ? specification.descending() : specification);
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}
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if (sorts.length == 0) {
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result.add(SqlBuilder.sortColumn(tableName, table.column(primaryKey)).descending());
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}
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return result;
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}
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}
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