io.camunda.operate.webapp.rest.FlowNodeInstanceMetadataBuilder Maven / Gradle / Ivy

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/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH under
 * one or more contributor license agreements. See the NOTICE file distributed
 * with this work for additional information regarding copyright ownership.
 * Licensed under the Camunda License 1.0. You may not use this file
 * except in compliance with the Camunda License 1.0.
 */
package io.camunda.operate.webapp.rest;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.camunda.operate.webapp.reader.DecisionInstanceReader;
import io.camunda.operate.webapp.reader.EventReader;
import io.camunda.operate.webapp.reader.ListViewReader;
import io.camunda.operate.webapp.reader.UserTaskReader;
import io.camunda.operate.webapp.rest.dto.metadata.BusinessRuleTaskInstanceMetadataDto;
import io.camunda.operate.webapp.rest.dto.metadata.CallActivityInstanceMetadataDto;
import io.camunda.operate.webapp.rest.dto.metadata.FlowNodeInstanceMetadata;
import io.camunda.operate.webapp.rest.dto.metadata.FlowNodeInstanceMetadataDto;
import io.camunda.operate.webapp.rest.dto.metadata.ServiceTaskInstanceMetadataDto;
import io.camunda.operate.webapp.rest.dto.metadata.UserTaskInstanceMetadataDto;
import io.camunda.webapps.schema.entities.operate.EventEntity;
import io.camunda.webapps.schema.entities.operate.FlowNodeInstanceEntity;
import io.camunda.webapps.schema.entities.operate.FlowNodeType;
import java.io.IOException;
import java.io.StringReader;
import java.util.Map;
import java.util.function.Function;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@Component
public class FlowNodeInstanceMetadataBuilder {

  private static final Logger LOGGER =
      LoggerFactory.getLogger(FlowNodeInstanceMetadataBuilder.class);
  private final DecisionInstanceReader decisionInstanceReader;

  private final ListViewReader listViewReader;

  private final EventReader eventReader;

  private final UserTaskReader userTaskReader;

  private final Map>
      flowNodeTypeToFlowNodeInstanceMetadata =
          Map.of(
              FlowNodeType.USER_TASK,
              this::getUserTaskInstanceMetadataDto,
              FlowNodeType.CALL_ACTIVITY,
              this::getCallActivityInstanceMetadataDto,
              FlowNodeType.BUSINESS_RULE_TASK,
              this::getBusinessRuleTaskInstanceMetadataDto,
              FlowNodeType.SERVICE_TASK,
              this::getServiceTaskInstanceMetadataDto);

  public FlowNodeInstanceMetadataBuilder(
      final ListViewReader listViewReader,
      final DecisionInstanceReader decisionInstanceReader,
      final EventReader eventReader,
      final UserTaskReader userTaskReader) {
    this.listViewReader = listViewReader;
    this.decisionInstanceReader = decisionInstanceReader;
    this.eventReader = eventReader;
    this.userTaskReader = userTaskReader;
  }

  public FlowNodeInstanceMetadata buildFrom(final FlowNodeInstanceEntity flowNodeInstance) {
    final FlowNodeType type = flowNodeInstance.getType();
    if (type == null) {
      LOGGER.error(
          String.format(
              "FlowNodeType for FlowNodeInstance with id %s is null", flowNodeInstance.getId()));
      return null;
    }
    final var flowNodeInstanceMetadataProvider =
        flowNodeTypeToFlowNodeInstanceMetadata.getOrDefault(
            type, this::getDefaultFlowNodeInstanceMetadataDto);
    return flowNodeInstanceMetadataProvider.apply(flowNodeInstance);
  }

  private FlowNodeInstanceMetadataDto getDefaultFlowNodeInstanceMetadataDto(
      final FlowNodeInstanceEntity flowNodeInstanceEntity) {
    final var event =
        eventReader.getEventEntityByFlowNodeInstanceId(flowNodeInstanceEntity.getId());
    return new FlowNodeInstanceMetadataDto(
        flowNodeInstanceEntity.getFlowNodeId(),
        flowNodeInstanceEntity.getId(),
        flowNodeInstanceEntity.getType(),
        flowNodeInstanceEntity.getStartDate(),
        flowNodeInstanceEntity.getEndDate(),
        event);
  }

  private BusinessRuleTaskInstanceMetadataDto getBusinessRuleTaskInstanceMetadataDto(
      final FlowNodeInstanceEntity flowNodeInstance) {
    final var instanceIdAndDefinitionName =
        decisionInstanceReader.getCalledDecisionInstanceAndDefinitionByFlowNodeInstanceId(
            flowNodeInstance.getId());
    final EventEntity event =
        eventReader.getEventEntityByFlowNodeInstanceId(flowNodeInstance.getId());
    final var calledDecisionInstanceId = instanceIdAndDefinitionName.getLeft();
    final var calledDecisionDefinitionName = instanceIdAndDefinitionName.getRight();
    return new BusinessRuleTaskInstanceMetadataDto(
        flowNodeInstance.getFlowNodeId(),
        flowNodeInstance.getId(),
        flowNodeInstance.getType(),
        flowNodeInstance.getStartDate(),
        flowNodeInstance.getEndDate(),
        event,
        calledDecisionInstanceId,
        calledDecisionDefinitionName);
  }

  private UserTaskInstanceMetadataDto getUserTaskInstanceMetadataDto(
      final FlowNodeInstanceEntity flowNodeInstance) {
    final var userTask = userTaskReader.getUserTaskByFlowNodeInstanceKey(flowNodeInstance.getKey());
    final var event = eventReader.getEventEntityByFlowNodeInstanceId(flowNodeInstance.getId());
    final var result =
        new UserTaskInstanceMetadataDto(
            flowNodeInstance.getFlowNodeId(),
            flowNodeInstance.getId(),
            flowNodeInstance.getType(),
            flowNodeInstance.getStartDate(),
            flowNodeInstance.getEndDate(),
            event);
    if (userTask.isPresent()) {
      final var task = userTask.get();
      result
          .setUserTaskKey(task.getUserTaskKey())
          .setAssignee(task.getAssignee())
          .setCandidateUsers(task.getCandidateUsers())
          .setCandidateGroups(task.getCandidateGroups())
          .setAction(task.getAction())
          .setDueDate(task.getDueDate())
          .setFollowUpDate(task.getFollowUpDate())
          .setChangedAttributes(task.getChangedAttributes())
          .setTenantId(task.getTenantId())
          .setFormKey(task.getFormKey())
          .setExternalReference(task.getExternalReference());
      try {
        result.setVariables(
            new ObjectMapper().readValue(new StringReader(task.getVariables()), Map.class));
      } catch (final IOException e) {
        result.setVariables(Map.of());
      }
    }
    return result;
  }

  private CallActivityInstanceMetadataDto getCallActivityInstanceMetadataDto(
      final FlowNodeInstanceEntity flowNodeInstance) {
    final var processInstanceIdAndName =
        listViewReader.getCalledProcessInstanceIdAndNameByFlowNodeInstanceId(
            flowNodeInstance.getId());
    final EventEntity event =
        eventReader.getEventEntityByFlowNodeInstanceId(flowNodeInstance.getId());
    final var calledProcessInstanceId = processInstanceIdAndName.getLeft();
    final var calledProcessDefinitionName = processInstanceIdAndName.getRight();
    return new CallActivityInstanceMetadataDto(
        flowNodeInstance.getFlowNodeId(),
        flowNodeInstance.getId(),
        flowNodeInstance.getType(),
        flowNodeInstance.getStartDate(),
        flowNodeInstance.getEndDate(),
        event,
        calledProcessInstanceId,
        calledProcessDefinitionName);
  }

  private ServiceTaskInstanceMetadataDto getServiceTaskInstanceMetadataDto(
      final FlowNodeInstanceEntity flowNodeInstance) {
    final var event = eventReader.getEventEntityByFlowNodeInstanceId(flowNodeInstance.getId());
    return new ServiceTaskInstanceMetadataDto(
        flowNodeInstance.getFlowNodeId(),
        flowNodeInstance.getId(),
        flowNodeInstance.getType(),
        flowNodeInstance.getStartDate(),
        flowNodeInstance.getEndDate(),
        event);
  }
}