func buildBuildStepParser()

in Sources/XCMetricsClient/Mobius/Effect Handlers/DumpParser/JSONMetricsParserFactory.swift [54:100]
45 lines of code
1 McCabe index (conditional complexity)

    func buildBuildStepParser(with type: BuildStepType) -> (Data) throws -> BuildInfo {
        return { data in
            let representation = try JSONMetricsParserFactory.parseJSON(data)
            guard representation["identifier"] != nil else {
                throw MetricsParserError.missingKey("identifier")
            }
            
            let startTimestamp: Double = representation.fetch("startTimestampMicroseconds")
            let endTimestamp: Double = representation.fetch("endTimestampMicroseconds")
            let detailType = DetailStepType.init(rawValue: representation.fetch("type")) ?? .other
            // TODO: Parse FunctionTimes as well
            let step = BuildStep(type: type,
                             machineName: representation.fetch("machineName") ,
                             buildIdentifier: representation.fetch("buildIdentifier") ,
                             identifier: representation.fetch("identifier") ,
                             parentIdentifier: representation.fetch("parentIdentifier", "targetIdentifier") ,
                             domain: representation.fetch("domain") ,
                             title: representation.fetch("title", "name") ,
                             signature: representation.fetch("signature") ,
                             startDate: representation.fetch("startDate") ,
                             endDate: representation.fetch("endDate") ,
                             startTimestamp: startTimestamp,
                             endTimestamp: endTimestamp,
                             duration: endTimestamp - startTimestamp,
                             detailStepType: detailType,
                             buildStatus: representation.fetch("buildStatus"),
                             schema: representation.fetch("schema"),
                             subSteps: [],
                             warningCount: representation.fetch("warningCount"),
                             errorCount: representation.fetch("errorCount"),
                             architecture: representation.fetch("architecture"),
                             documentURL: representation.fetch("documentURL"),
                             warnings: [],
                             errors: [],
                             notes: [],
                             swiftFunctionTimes: nil,
                             fetchedFromCache: representation.fetch("fetchedFromCache"),
                             compilationEndTimestamp: representation.fetch("compilationEndTimestamp"),
                             compilationDuration: representation.fetch("compilationDuration"),
                             clangTimeTraceFile: nil,
                             linkerStatistics: nil,
                             swiftTypeCheckTimes: nil)
            return BuildInfo(step: step,
                             projectName: representation.fetch("projectName"),
                             userID: representation.fetch("userID"))
        }
    }