function getExpressionQuery()

in src/hooks/useExpressionsProcessor.ts [399:466]
65 lines of code
20 McCabe index (conditional complexity)

  function getExpressionQuery(partMetrics?: string[]) {
    const conditions: { [key: string]: unknown } = {
      duration: appStore.durationTime,
    };
    const variables: string[] = [`$duration: Duration!`];
    const fragmentList = instances.map((d: any, index: number) => {
      let serviceName;
      let destServiceName;
      let endpointName;
      let serviceInstanceName;
      let destServiceInstanceName;
      let destEndpointName;
      let normal = false;
      let destNormal;
      if (d.sourceObj && d.targetObj) {
        // instances = Calls
        serviceName = d.sourceObj.serviceName || d.sourceObj.name;
        destServiceName = d.targetObj.serviceName || d.targetObj.name;
        normal = d.sourceObj.normal || d.sourceObj.isReal || false;
        destNormal = d.targetObj.normal || d.targetObj.isReal || false;
        if (EntityType[4].value === dashboardStore.entity) {
          serviceInstanceName = d.sourceObj.name;
          destServiceInstanceName = d.targetObj.name;
        }
        if (EntityType[2].value === dashboardStore.entity) {
          endpointName = d.sourceObj.name;
          destEndpointName = d.targetObj.name;
        }
      } else {
        // instances = Nodes
        serviceName = d.serviceName || d.name;
        normal = d.normal || d.isReal || false;
        if (EntityType[3].value === dashboardStore.entity) {
          serviceInstanceName = d.name;
        }
        if (EntityType[4].value === dashboardStore.entity) {
          serviceInstanceName = d.name;
        }
        if (EntityType[2].value === dashboardStore.entity) {
          endpointName = d.name;
        }
      }
      const entity = {
        serviceName,
        normal,
        serviceInstanceName,
        endpointName,
        destServiceName,
        destNormal: destServiceName ? destNormal : undefined,
        destServiceInstanceName,
        destEndpointName,
      };
      variables.push(`$entity${index}: Entity!`);
      conditions[`entity${index}`] = entity;
      const f = (partMetrics || metrics).map((name: string, idx: number) => {
        if (index === 0) {
          variables.push(`$expression${idx}: String!`);
          conditions[`expression${idx}`] = name;
        }
        return `expression${index}${idx}: execExpression(expression: $expression${idx}, entity: $entity${index}, duration: $duration)${RespFields.execExpression}`;
      });
      return f;
    });
    const fragment = fragmentList.flat(1).join(" ");
    const queryStr = `query queryData(${variables}) {${fragment}}`;

    return { queryStr, conditions };
  }