@nestjs/graphql/dist/services/base-explorer.service.js

Nest - modern, fast, powerful node.js web framework (@graphql)

export class BaseExplorerService {
    getModules(modulesContainer, include) {
        if (!modulesContainer) {
            return [];
        }
        if (!include || include.length === 0) {
            return [...modulesContainer.values()];
        }
        const explicitlyWhitelisted = this.includeWhitelisted(modulesContainer, include);
        const modulesToInclude = [];
        const toCheck = [...explicitlyWhitelisted];
        while (toCheck.length) {
            const moduleRef = toCheck.pop();
            if (!modulesToInclude.includes(moduleRef)) {
                modulesToInclude.push(moduleRef);
                toCheck.push(...moduleRef.imports);
            }
        }
        return modulesToInclude;
    }
    includeWhitelisted(modulesContainer, include) {
        const modules = [...modulesContainer.values()];
        return modules.filter(({ metatype }) => include.some((item) => item === metatype));
    }
    flatMap(modules, callback) {
        return modules.reduce((collected, moduleRef) => {
            const providers = [...moduleRef.providers.values()];
            for (const wrapper of providers) {
                const result = callback(wrapper, moduleRef);
                if (Array.isArray(result)) {
                    collected.push(...result.filter(Boolean));
                }
                else if (result) {
                    collected.push(result);
                }
            }
            return collected;
        }, []);
    }
    groupMetadata(resolvers) {
        return resolvers.reduce((grouped, metadata) => {
            grouped[metadata.type] ??= {};
            grouped[metadata.type][metadata.name] = metadata.callback;
            return grouped;
        }, {});
    }
}