const handleComposite = function()

in parsers/LU/JS/packages/lu/src/parser/lufile/parseFileContents.js [1512:1566]
51 lines of code
19 McCabe index (conditional complexity)

const handleComposite = function(parsedContent, entityName, entityType, entityRoles, range, inlineChildRequired, isEntityTypeDefinition) {
    // remove simple entity definitions for composites but carry forward roles.
    // Find this entity if it exists in the simple entity collection
    let simpleEntityExists = (parsedContent.LUISJsonStructure.entities || []).find(item => item.name == entityName);
    if (simpleEntityExists !== undefined) {
        // take and add any roles into the roles list
        (simpleEntityExists.roles || []).forEach(role => !entityRoles.includes(role) ? entityRoles.push(role) : undefined);
        // remove this simple entity definition
        for (var idx = 0; idx < parsedContent.LUISJsonStructure.entities.length; idx++) {
            if (parsedContent.LUISJsonStructure.entities[idx].name === simpleEntityExists.name) {
                parsedContent.LUISJsonStructure.entities.splice(idx, 1);
            }
        }
    }
    // handle composite entity definition
    // drop [] and trim
    let childDefinition = entityType.trim().replace('[', '').replace(']', '').trim();
    if (childDefinition.length === 0 && inlineChildRequired) {
        let errorMsg = `Composite entity: ${entityName} is missing child entity definitions. Child entities are denoted via [entity1, entity2] notation.`;
        let error = BuildDiagnostic({
            message: errorMsg,
            range: range
        })

        throw (new exception(retCode.errorCode.INVALID_COMPOSITE_ENTITY, error.toString(), [error]));
    }
    // split the children based on ',' or ';' delimiter. Trim each child to remove white spaces.
    let compositeChildren = childDefinition !== "" ? childDefinition.split(new RegExp(/[,;]/g)).map(item => item.trim()) : [];
    // add this composite entity if it does not exist
    let compositeEntity = (parsedContent.LUISJsonStructure.composites || []).find(item => item.name == entityName);
    if (compositeEntity === undefined) {
        // add new composite entity
        parsedContent.LUISJsonStructure.composites.push(new helperClass.compositeEntity(entityName, compositeChildren, entityRoles));

        // remove composite that might have been tagged as a simple entity due to inline entity definition in an utterance
        parsedContent.LUISJsonStructure.entities = (parsedContent.LUISJsonStructure.entities || []).filter(entity => entity.name != entityName);
    } else {
        if (isEntityTypeDefinition) {
            if (compositeEntity.children.length !== 0 && JSON.stringify(compositeChildren.sort()) !== JSON.stringify(compositeEntity.children.sort())) {
                let errorMsg = `Composite entity: ${entityName} has multiple definition with different children. \n 1. ${compositeChildren.join(', ')}\n 2. ${compositeEntity.children.join(', ')}`;
                let error = BuildDiagnostic({
                    message: errorMsg,
                    range: range
                })
    
                throw (new exception(retCode.errorCode.INVALID_COMPOSITE_ENTITY, error.toString(), [error]));
            }
        }

        // update roles
        // update children
        compositeChildren.forEach(item => compositeEntity.children.push(item));
        addItemOrRoleIfNotPresent(parsedContent.LUISJsonStructure, LUISObjNameEnum.COMPOSITES, compositeEntity.name, entityRoles);
    }
};