deviceAndVersionSpecificInformationAsString.swift

static func deviceAndVersionSpecificInformationAsString(userID: String?) -> String {
        let processInfo = NSProcessInfo()
        let byteCountFormatter = NSByteCountFormatter()
        var data = Array<String>()
        var systemComponents = Array<String>()
        
        byteCountFormatter.countStyle = .Memory
        byteCountFormatter.allowsNonnumericFormatting = false
        
        data.append(UIDevice.versionString())
        
        
        if let uid = userID {
            data.append("UID: \(uid)")
        } else {
            data.append("UID: -")
        }
        
        
        if let platformRawString = UIDevice.platformRawString() {
            systemComponents.append(platformRawString)
        }
        systemComponents.append("iOS \(processInfo.operatingSystemVersionString)")
        data.append("System: \(systemComponents.joinWithSeparator(" - "))")
        
        
        let batteryLevelName = NSLocalizedString(Constants.kEmailBatteryLevelText, comment: "String used in email body for the battery level")
        data.append(String(format: "%@: %zd%%", batteryLevelName, UIDevice.batteryLevelInPercent()))
        
        
        let processorCountName = NSLocalizedString(Constants.kEmailProcessorCountText, comment: "String used in email body for the processor count")
        data.append("\(processorCountName): \(processInfo.processorCount)")
        
        
        let physicalMemoryName = NSLocalizedString(Constants.kEmailPhysicalMemoryText, comment: "String used in email body for the physical memory")
        let physicalMemory = byteCountFormatter.stringFromByteCount(Int64(processInfo.physicalMemory))
        data.append("\(physicalMemoryName): \(physicalMemory)")
        
        let uptimeName = NSLocalizedString(Constants.kEmailUptimeText, comment: "String used in email body for the physical memory")
        let dateComponentsFormatter = NSDateComponentsFormatter()
        dateComponentsFormatter.unitsStyle = .Abbreviated
        dateComponentsFormatter.maximumUnitCount = 2
        let uptime = dateComponentsFormatter.stringFromTimeInterval(processInfo.systemUptime)
        data.append("\(uptimeName): \(uptime!)")
        
        
        let freeDiskSpaceName = NSLocalizedString(Constants.kEmailFreeDiskSpaceText, comment: "String used in email body for the physical memory")
        var freeDiskSpace = byteCountFormatter.stringFromByteCount(0)
        if let diskSpace = UIDevice.deviceRemainingFreeSpaceInBytes() {
            freeDiskSpace = byteCountFormatter.stringFromByteCount(diskSpace)
        }
        data.append("\(freeDiskSpaceName): \(freeDiskSpace)")
        
        
        return "\n\n\n---\n\(data.joinWithSeparator("\n"))"
    }