package model type Device struct { ID string `json:"id"` Name string `json:"name"` Type string `json:"type"` // desktop | mobile | tablet OS string `json:"os"` LastSeen string `json:"lastSeen"` Current bool `json:"current"` } type DeviceStore struct { Devices []Device } func NewDeviceStore() *DeviceStore { return &DeviceStore{Devices: defaultDevices()} } func (s *DeviceStore) All() []Device { return s.Devices } func defaultDevices() []Device { return []Device{ {ID: "d1", Name: "MacBook Pro M4", Type: "desktop", OS: "macOS 15 Sequoia", LastSeen: "Just now", Current: true}, {ID: "d2", Name: "iPhone 17 Pro", Type: "mobile", OS: "iOS 20", LastSeen: "2 hours ago", Current: false}, {ID: "d3", Name: "iPad Air M3", Type: "tablet", OS: "iPadOS 20", LastSeen: "Yesterday", Current: false}, } }