P15GEN2\59518
2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa
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package foundation.state;
 
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Set;
 
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
 
import foundation.action.ActionContext;
import foundation.action.SingletonActionProvider;
import foundation.action.StateContext;
import foundation.action.WorkFlowRuntime;
import foundation.action.WorkStepKey;
import foundation.dao.DataPackage;
import foundation.dao.DataReader;
import foundation.dao.DataSource;
import foundation.dao.DataWriter;
import foundation.dao.Domain;
import foundation.dao.PackageItem;
import foundation.dao.bizlogic.DataStates;
import foundation.dao.bizlogic.IStateProvider;
import foundation.data.entity.Entity;
import foundation.data.object.DataObject;
import foundation.data.object.EntitySaver;
import foundation.state.approve.ApprovalResult;
import foundation.state.approve.ApproveOperate;
import foundation.state.approve.ApproveRuntime;
import foundation.state.approve.StepLocation;
import foundation.state.approve.WorkingInstance;
import foundation.token.IOnlineUser;
import foundation.util.CaseInsensitiveSet;
import foundation.util.Util;
import foundation.variant.provider.DataEvent;
 
 
public class StateCenter extends SingletonActionProvider implements IStateProvider {
    
    protected static Logger logger = LogManager.getLogger(StateCenter.class);
    protected static String StateName_Back = "审批退回";
    protected static String StateName_Cancel = "申请人撤回";
    private static StateCenter instance;
    private Set<String> targetOperators;
 
    private StateCenter() {
        targetOperators = new CaseInsensitiveSet();    
    }
 
    public static synchronized StateCenter getInstance() {
        if (instance == null) {
            instance = new StateCenter();
        }
 
        return instance;
    }
    
    public void exec(ActionContext context, String methodName) throws Exception {
        Method method = getMethod(methodName);
        
        if (method == null) {
            doExec(context, methodName);
            return;
        }
        
        try {
            method.invoke(this, context);
        }
        catch (InvocationTargetException e) {
            e.printStackTrace();
            Throwable throwable = e.getTargetException();
 
            if (throwable == null) {
                throw e;
            }
            else {
                throw (Exception) throwable;
            }
        }        
    }
    
    @Override
    protected void publishMethod() {
        //1.1 【状态】-- 提交 状态进入到 To 位置
        addMethod("commit");
        
        //1.2 【状态】-- 状态回退到 From 位置
        addMethod("stateBack");
        
        //1.3 【状态】-- 状态进入到End位置
        addMethod("stateEnd");
        
        //2.1 【审批】-- 审批同意(下一步)
        addMethod("approve");
        
        //2.2 【审批】-- 审批同意(跳过所有审批直接成功)
        addMethod("goEnd");
        
        //2.3 【审批】-- 审批不同意,回退上一步
        addMethod("goBack");
        
        //2.4 【审批】-- 审批不同意(一票否决)
        addMethod("goHome");
        
        //2.5 【审批】-- 申请人撤回
        addMethod("pullBack");
        
        //2.6 【审批】-- 变更 状态进入到 To 位置
        addMethod("toChange");
        
        //2.7 【审批】-- 关闭 状态进入到 To 位置
        addMethod("toClose");
        
        //3.1 获取状态机信息(页面审批-通过DataName)
        addMethod("getMachine");
        
        //3.2 获取状态机信息(状态机设计器-通过状态机ID)
        addMethod("getOneMachine");
        
        //3.3 保存状态机图数据
        addMethod("saveOneMachine");
        
        //3.4 获取审批步骤
        addMethod("getApproveSteps");
        
        //4. 获取状态机操作列表
        addMethod("getPoints");
        
        //5. 获取状态机操作列表(通过审批流ID)
        addMethod("getPointsByApprove");
    }
    
    public void doExec(ActionContext context, String operator) throws Exception {
        runState(context, operator, null, null, null);
    }
    
    public void commit(ActionContext context) throws Exception {
        runState(context, "commit", null, DataEvent.Commit, null);
    }
 
    public void toChange(ActionContext context) throws Exception {
        runState(context, "toChange", null, DataEvent.toChange, null);
    }
 
    public void toClose(ActionContext context) throws Exception {
        runState(context, "toClose", null, DataEvent.toClose, null);
    }
    
    public void stateBack(ActionContext context) throws Exception {
        runState(context, "stateBack", null, DataEvent.StateBack, StateName_Back);
    }
    
    public void stateEnd(ActionContext context) throws Exception {
        runState(context, "stateEnd", null, DataEvent.StateEnd, StateName_Back);
    }
    public void approve(ActionContext context) throws Exception {
        runApprove(context, ApproveOperate.Approve);
    }
    
    public void goEnd(ActionContext context) throws Exception {
        runApprove(context, ApproveOperate.GoEnd);
    }
    
    public void goBack(ActionContext context) throws Exception {
        runApprove(context, ApproveOperate.GoBack);
    }
    
    public void goHome(ActionContext context) throws Exception {
        runApprove(context, ApproveOperate.GoHome);
    }
    
    public void pullBack(ActionContext context) throws Exception {
        runApprove(context, ApproveOperate.PullBack);
    }
    
    public void runState(ActionContext context, String operator, ReferObject referObject, DataEvent dataEvent, String stateName) throws Exception {
        StateOperate operate = StateOperate.parse(operator);
        State state = null; 
        
        try {
            DataReader dataReader = context.getDataReader(); 
            DataWriter dataWriter = context.getDataWriter();
            
            //1. 获取直接状态对象的 State Point
            DataPackage dataPackage = dataReader.getDataPackage();
            StatePoint statePoint = getStatePoint(dataPackage, operator, dataWriter);
            
            if (statePoint == null) {
                context.terminateTask();
                return;
            }
            
            //2. 改变直接状态对象的状态
            state = doRunState(SenderType.Original, dataPackage, statePoint, operate, dataEvent, stateName);
            context.setStateCode(dataPackage.getName(), state.getCode());
            
            //3. 如果有Host,处理对象的状态
            DataPackage host = dataPackage.getHost();
            
            StatePoint hostPoint = null;
            if (host != null) {
                hostPoint = getStatePoint(host, operator, dataWriter);
                
                if (hostPoint == null) {
                    context.terminateTask();
                    return;
                }
                
                state = doRunState(SenderType.Host, host, hostPoint, operate, dataEvent, null);
                context.setStateCode(host.getName(), state.getCode());
            }
            
            //4. 处理Refer对象状态
            StatePoint referPoint = null;
            if (referObject == null) {
                referObject = new ReferObject(dataReader);
            }
 
            if (!referObject.isEmpty()) {
                DataPackage refer = DataPackage.getInstance(referObject.getDataName());
                refer.setMasterId(referObject.getId());
                refer.loadMasterFromDB();
                
                referPoint = getStatePoint(refer, operator, dataWriter);
                
                if (referPoint == null) {
                    context.terminateTask();
                    return;
                }
                
                state = doRunState(SenderType.Refer, refer, referPoint, operate, dataEvent, null);
                context.setStateCode(refer.getName(), state.getCode());
            }
            
            //5. 如果直接直接状态对象配置了审批,启动审批流
            if ((StateOperate.Commit == operate || StateOperate.toChange == operate || StateOperate.toClose == operate)  && statePoint.isFireAppproveFlow()) {
                String dataName = dataPackage.getName();
                String masterId = dataPackage.getMasterId();
                IOnlineUser user = dataReader.getUser();
                
                DetailState detailState = WorkingInstance.start(dataName, masterId, statePoint, hostPoint, referPoint, referObject, user, context);
                doRunDetailState(dataPackage, detailState);
            }
            
            //6. 返回直接状态对象的状态
            String result = state.getName();
            dataWriter.reportOneMessage("runState", "执行成功,当前状态为[" + result + "]");
        }
        catch (Exception e) {
            context.terminateTask();
            e.printStackTrace();
        }
    }
    
 
    public void runApprove(ActionContext context, ApproveOperate operator) throws Exception {
        try {
            DataReader dataReader = context.getDataReader(); 
            DataWriter dataWriter = context.getDataWriter();
            
            //1. 获取当前审批流程
            DataPackage dataPackage = dataReader.getDataPackage();
            String dataName = dataPackage.getName();
            StateMachine machine = MachineBucket.getMachineByDataName(dataName);
            
            Domain domain = dataReader.getDomain();
            String masterId = domain.getId();
            Entity masterEntity = dataPackage.getMasterEntity();
            WorkingInstance flowInstance = WorkingInstance.getInstance(machine, masterId);
            
            if (flowInstance.isEmpty()) {
                logger.error("approval not exists, document id is {}", masterId);
                StateMessage message = StateMessage.getInstance(dataName, "approveFinished", "审批已结束,无法完成当前操作");
                dataWriter.reportOneError("approve", message.getContent(dataPackage));
                return;
            }
 
            //2. 获取 State Point
            String masterPointId = flowInstance.getMasterPointId();
            StatePoint statePoint = StateMachine.getGlobalPoint(masterPointId);
            if (statePoint == null) {
                context.terminateTask();
                logger.error("approve error, state point not exists: {}", masterPointId);
                return;
            }
            
            //3. 检查当前用户是否合法
            flowInstance.gotoActiveStep();
            
            IOnlineUser onlineUser = dataReader.getUser();
            String creatorId = masterEntity.getString("creator_id");
            
            if (!flowInstance.validateCurrentUser(operator, onlineUser, creatorId)) {
                logger.error("approval user not valid, document:{} , user:{}", masterId, onlineUser.getName());
                StateMessage message = StateMessage.getInstance(dataName, "IllegalUser", "用户没有权限审批当前节点,无法审批");
                dataWriter.reportOneError("approve", message.getContent(dataPackage));
                return;
            }
            
            StepLocation position = null;
            ApprovalResult approvalResult = new ApprovalResult();
            ReferObject referObject = new ReferObject(flowInstance.getMaster());
            String remark = dataReader.getString("remark");
            
            //4.1 审批通过
            if (ApproveOperate.Approve == operator) {
                approvalResult = flowInstance.runStep(statePoint, onlineUser, operator, remark);
                position = approvalResult.getStepLoscation();
                
                if (StepLocation.AtSuccess == position) {
                    flowInstance.close();
                    logger.info("审批动作", StateOperate.StateEnd);
                    approveRunState(context, statePoint, flowInstance, StateOperate.StateEnd, referObject, null);
                }
            }
            //4.2 审批通过(进入到状态Final)
            else if (ApproveOperate.GoEnd == operator) {
                approvalResult = flowInstance.runStep(statePoint, onlineUser, operator, remark);
                flowInstance.close();
                
                approveRunState(context, statePoint, flowInstance, StateOperate.StateEnd, referObject, null);
            }
            //4.3 审批不通过(回退一步)
            else if (ApproveOperate.GoBack == operator) {
                approvalResult = flowInstance.runStep(statePoint, onlineUser, operator, remark);
                position = approvalResult.getStepLoscation();
                
                if (StepLocation.AtHome == position) {
                    flowInstance.close();
                    approveRunState(context, statePoint, flowInstance, StateOperate.StateFrom, referObject, StateName_Back);
                }
            }
            //4.4 审批不通过(回退到状态Home)
            else if (ApproveOperate.GoHome == operator) {
                approvalResult = flowInstance.runStep(statePoint, onlineUser, operator, remark);
                flowInstance.close();
                
                approveRunState(context, statePoint, flowInstance, StateOperate.StateFrom, referObject, StateName_Back);
            }
            //4.5 申请人主动撤销(回退到状态Home)
            else if (ApproveOperate.PullBack == operator) {
                approvalResult = flowInstance.runStep(statePoint, onlineUser, operator, remark);
                flowInstance.close();
                
                approveRunState(context, statePoint, flowInstance, StateOperate.StateFrom, referObject, StateName_Cancel);
            }
            
            DetailState detailState = approvalResult.getDetailState();
            doRunDetailState(dataPackage, detailState);
        }
        catch (Exception e) {
            context.terminateTask();
            e.printStackTrace();
        }         
     }
    
    public void approveRunState(ActionContext context, StatePoint statePoint, WorkingInstance flowInstance, StateOperate operate, ReferObject referObject, String stateName) throws Exception {
        try {
            DataReader dataReader = context.getDataReader(); 
            
            if (referObject == null) {
                referObject = new ReferObject(dataReader);
            }
            
            DataPackage dataPackage = dataReader.getDataPackage();
            State state = doRunState(SenderType.Original, dataPackage, statePoint, operate, null, stateName);
            context.setStateCode(dataPackage.getName(), state.getCode());
            context.setStateCode(dataPackage.getName(), operate.name());
            
            //1. 如果有Host,处理对象的状态
            DataPackage host = dataPackage.getHost();
            
            if (host != null) {
                String hostPointId = flowInstance.getHostPointId();
                statePoint = StateMachine.getGlobalPoint(hostPointId);
                if (statePoint == null) {
                    context.terminateTask();
                    logger.error("approve error, state point not exists: {}", hostPointId);
                    return;
                }
                
                state = doRunState(SenderType.Host, host, statePoint, operate, null, null);
                context.setStateCode(host.getName(), state.getCode());
            }
            
            //2. 处理Refer对象状态    
            if (referObject != null && !referObject.isEmpty()) {
                String referPointId = flowInstance.getReferPointId();
                statePoint = StateMachine.getGlobalPoint(referPointId);
                if (statePoint == null) {
                    context.terminateTask();
                    logger.error("approve error, state point not exists: {}", referPointId);
                    return;
                }
                
                DataPackage refer = DataPackage.getInstance(referObject.getDataName());
                refer.setMasterId(referObject.getId());
                refer.loadMasterFromDB();
                
                state = doRunState(SenderType.Refer, refer, statePoint, operate, null, stateName);
                context.setStateCode(refer.getName(), state.getCode());
            }
        }
        catch (Exception e) {
            context.terminateTask();
            e.printStackTrace();
        }        
    }
    
    private StatePoint getStatePoint(DataPackage dataPackage, String operator, DataWriter dataWriter) {
        //1. 获取单据头
        String dataName = dataPackage.getName();
        Entity master = dataPackage.getMasterEntity(DataSource.DB, DataSource.Request, DataSource.File);
        
        if (master == null) {
            if (dataWriter != null) {
                StateMessage message = StateMessage.getInstance(dataName, "documentNotExists", "单据数据不存在,状态机无法工作");
                dataWriter.reportOneError("runState", message.getContent(dataPackage));
            }
            return null;
        }
        
        //2. 获取状态机
        StateMachine machine = MachineBucket.getMachineByDataName(dataName);
        
        if (machine == null) {
            if (dataWriter != null) {
                StateMessage message = StateMessage.getInstance(dataName, "MachineNotExists", "状态机不存在(" + dataName + ")");
                dataWriter.reportOneError("runState", message.getContent(dataPackage));    
            }
            return null;
        }
        
        //3. 通过状态操作获取Point
        StateField stateField = machine.getStateField();
        String fromStateCode = master.getString(stateField.getCode());
        String fromStateName = master.getString(stateField.getName());
        
        String key = StatePoint.createKey(fromStateCode, operator);
        StatePoint point = machine.getPoint(key);
        
        if (point != null) {
            return point;
        }
        
        //4. 通过审批流操作获取Point
        ApproveOperate approveOperate = ApproveOperate.parse(operator);
        
        if (ApproveOperate.Unknown == approveOperate) {
            return null;
        }
        
        point = machine.getPointByToState(fromStateCode);
        
        if (point == null) {
            if (dataWriter != null) {
                logger.error("invalid operator {}.{} on state {}", operator, fromStateCode);
                StateMessage message = StateMessage.getInstance(dataName, "PointNotExists", "状态(" + fromStateName + ")不支持当前操作");
                dataWriter.reportOneError("runState", message.getContent(dataPackage));    
            }
            return null;
        }
        
        return point;
    }
    
    private State doRunState(SenderType senderType, DataPackage dataPackage, StatePoint point, StateOperate operate, DataEvent dataEvent, String stateName) throws Exception {
        StateMachine machine = point.getMachine();
        StateField stateField = machine.getStateField();
        
        State result = null;
        
        //1. 如果是提交操作
        if (StateOperate.Commit == operate || StateOperate.toChange == operate || StateOperate.toClose == operate) {
            result = point.getToState();
        }
        //2. 如果是回退操作
        else if (StateOperate.StateEnd == operate) {
            result = point.getEndState();
        }
        //3. 如果是回退操作
        else if (StateOperate.StateFrom == operate) {
            result = State.stateCopy(point.getFromState());
            
            if (SenderType.Original == senderType && (!Util.isEmpty(stateName))) {
                result.setName(stateName);
            }
        }
        
        if (result != null) {
            updateDocumentState(stateField, result, dataPackage, dataEvent);
        }
        
        return result;
    }
    
    private void doRunDetailState(DataPackage dataPackage, DetailState step) throws Exception {
        if (step == null) {
            return ;
        }
        DataObject masterObject = dataPackage.getMasterDataObject();
        EntitySaver saver;
        
        //1. 设置状态
        if (dataPackage.getMasterEntity() == null) {
            saver = masterObject.createEntitySaver(dataPackage.getMasterId());
        }
        else{
            saver = masterObject.createEntitySaver(dataPackage.getMasterEntity());
        }
        saver.set("state_step_code", step.getCode());
        saver.set("state_step_name", step.getName());
        
        //2. 更新数据库
        saver.update();
    }
 
    private void updateDocumentState(StateField stateField, State toState, DataPackage dataPackage, DataEvent dataEvent) throws Exception {
        DataObject masterObject = dataPackage.getMasterDataObject();
        EntitySaver saver;
        
        //1. 设置状态
        if (dataPackage.getMasterEntity() == null) {
            saver = masterObject.createEntitySaver(dataPackage.getMasterId());
        }
        else{
            saver = masterObject.createEntitySaver(dataPackage.getMasterEntity());
        }
        saver.set(stateField.getCode(), toState.getCode());
        saver.set(stateField.getName(), toState.getName());
        
        //2. 更新数据库
        saver.update(dataEvent);
    }
    
    public void getApproveSteps(ActionContext context) throws Exception {
        DataReader dataReader = context.getDataReader();
        Domain domain = dataReader.getDomain();
        DataPackage dataPackage = domain.getDataPackage();
        DataWriter dataWriter = context.getDataWriter();
        
        //1.
        String dataName = domain.getDataName();
        StateMachine machine = MachineBucket.getMachineByDataName(dataName);
        
        if (machine == null) {
            StateMessage message = StateMessage.getInstance(dataName, "MachineNotExists", "状态机不存在(" + dataName + ")");
            dataWriter.reportOneError("runState", message.getContent(dataPackage));    
            return;
        }
        
        //2. 获取Point
        String fromStateCode = dataReader.getString("from_state");
        String operator = dataReader.getString("operator");
                
        String key = StatePoint.createKey(fromStateCode, operator);
        StatePoint point = machine.getPoint(key);
        
        if (point == null) {
            StateMessage message = StateMessage.getInstance(dataName, "PointNotExists", "状态(" + fromStateCode + ")不支持当前操作");
            dataWriter.reportOneError("runState", message.getContent(dataPackage));    
            return;
        }
        
        //3. 获取步骤
        IOnlineUser user = dataReader.getUser();
        ApproveRuntime steps = point.getSteps(user, context);
        
        //4. 返回
        dataWriter.addValue(steps);
    }
    
    public void getMachine(ActionContext context) throws Exception {
        DataReader dataReader = context.getDataReader();
        Domain domain = dataReader.getDomain();
        DataWriter dataWriter = context.getDataWriter();
        
        String dataName = domain.getDataName();
        StateMachine machine = MachineBucket.getMachineByDataName(dataName);
        
        dataWriter.addValue("machine", machine);
    }
    
    public void getOneMachine(ActionContext context) throws Exception {
        DataReader dataReader = context.getDataReader();
        Domain domain = dataReader.getDomain();
        DataWriter dataWriter = context.getDataWriter();
        
        String id = domain.getId();
        StateMachine machine = MachineBucket.getMachineById(id);
        
        dataWriter.addValue("machine", machine);
    }
    
    public void getPoints(ActionContext context) throws Exception {
        DataWriter dataWriter = context.getDataWriter();
        
        MachineBucket bucket = MachineBucket.getInstance();
        StatePoints statePointList = new StatePoints();
         
        for (StateMachine machine : bucket) {
            statePointList.addAll(machine.getStatePoints());
        }
        
        dataWriter.addValue(statePointList);
    }
 
    public void getPointsByApprove(ActionContext context) throws Exception {
        DataReader dataReader = context.getDataReader();
        DataWriter dataWriter = context.getDataWriter();
        
        String approveId = dataReader.getString("approve_id");
        StatePoints bucket = StateMachineLoader.loadPointsByApproveId(approveId);
        
        dataWriter.addValue(bucket);
    }
 
    @Override
    public DataStates queryToStates(WorkFlowRuntime workflow, DataPackage dataPackage, String operator, DataWriter dataWriter) {
        DataStates result = new DataStates();
        
        Operate operate = new Operate(operator);
        
        //1. 获取直接状态对象的 State
        String dataName = dataPackage.getName();
        StateContext stateContext = workflow.getStateContext();
        stateContext.setState(dataName, operate.getStateOperate().name());
                
        StatePoint statePoint = getStatePoint(dataPackage, operator, null);
        
        if (statePoint != null) {
            String stateCode = getTargetStateCode(statePoint, operate.getInitialOperator());
            result.setState(dataName, stateCode);
        }
        
        //2. 获取 Host 对象状态
        DataPackage host = dataPackage.getHost();
        
        if (host == null) {
            return result;
        }
        
        statePoint = getStatePoint(host, operator, null);
        
        if (statePoint != null) {
            String stateCode = getTargetStateCode(statePoint, operator);
            result.setState(host.getName(), stateCode);
        }
        
        return result;
    }
    
    private String getTargetStateCode(StatePoint statePoint, String operator) {
        StateOperate stateOperate = StateOperate.parse(operator);
        
        if (StateOperate.Commit == stateOperate || StateOperate.toChange == stateOperate || StateOperate.toClose == stateOperate) {
            return statePoint.getToCode();
        }
        else if (StateOperate.StateEnd == stateOperate) {
            return statePoint.getEndCode();
        }
        else if (StateOperate.StateFrom == stateOperate) {
            return statePoint.getFromCode();
        }
        
        ApproveOperate approveOperate = ApproveOperate.parse(operator);
 
        if (ApproveOperate.Approve == approveOperate) {
            return statePoint.getEndCode();
        }
        else if (ApproveOperate.GoEnd == approveOperate) {
            return statePoint.getEndCode();
        }
        else if (ApproveOperate.GoHome == approveOperate) {
            return statePoint.getFromCode();
        }
        else if (ApproveOperate.PullBack == approveOperate) {
            return statePoint.getFromCode();
        }
        else if (ApproveOperate.GoBack == approveOperate) {
            return statePoint.getFromCode();
        }
        
        return null;
    }
 
    @Override
    public boolean isInFreedom(DataPackage dataPackage) throws Exception {
        dataPackage.loadMasterFromDB();
        
        PackageItem master = dataPackage.getMaster();
        Entity entity = dataPackage.getMasterEntity(DataSource.DB);
        
        if (entity == null) {
            return true;
        }
        
        //1. 得到当前状态
        String dataName = master.getName();
        StateField stateField = MachineBucket.getStateField(dataName);
        
        String stateCode = entity.getString(stateField.getCode());
        
        //2. 检查是否处于自由态
        boolean inFreedom = MachineBucket.isInFreedom(dataName, stateCode);
        return inFreedom;
    }
    
    public String getName() {
        return StateCenter.class.getSimpleName();
    }
 
    public void loadOneTargetOperator(String target, String operator) {
        String key = WorkStepKey.getObjectKey(target, operator);
        targetOperators.add(key);
    }
 
    public Set<String> getTargetOperators() {
        return targetOperators;
    }
 
}