runtime

type ConsoleSize struct {
	Width  uint32
	Height uint32
}

type CreateOpts struct {
	// Spec is the OCI runtime spec
	Spec *types.Any
	// Rootfs mounts to perform to gain access to the container's filesystem
	Rootfs []mount.Mount
	// IO for the container's main process
	IO IO
	// Checkpoint digest to restore container state
	Checkpoint string
	// Options for the runtime and container
	Options *types.Any
}

type ExecOpts struct {
	Spec *types.Any
	IO   IO
}

type Exit struct {
	Pid       uint32
	Status    uint32
	Timestamp time.Time
}

type IO struct {
	Stdin    string
	Stdout   string
	Stderr   string
	Terminal bool
}

type Process interface {
	ID() string
	// State returns the process state
	State(context.Context) (State, error)
	// Kill signals a container
	Kill(context.Context, uint32, bool) error
	// Pty resizes the processes pty/console
	ResizePty(context.Context, ConsoleSize) error
	// CloseStdin closes the processes stdin
	CloseIO(context.Context) error
	// Start the container's user defined process
	Start(context.Context) error
	// Wait for the process to exit
	Wait(context.Context) (*Exit, error)
}

type ProcessInfo struct {
	// Pid is the process ID
	Pid uint32
	// Info includes additional process information
	// Info varies by platform
	Info interface{}
}

type Runtime interface {
	// ID of the runtime
	ID() string
	// Create creates a task with the provided id and options.
	Create(ctx context.Context, id string, opts CreateOpts) (Task, error)
	// Get returns a task.
	Get(context.Context, string) (Task, error)
	// Tasks returns all the current tasks for the runtime.
	// Any container runs at most one task at a time.
	Tasks(context.Context) ([]Task, error)
	// Delete removes the task in the runtime.
	Delete(context.Context, Task) (*Exit, error)
}

type State struct {
	// Status is the current status of the container
	Status Status
	// Pid is the main process id for the container
	Pid uint32
	// ExitStatus of the process
	// Only valid if the Status is Stopped
	ExitStatus uint32
	// ExitedAt is the time at which the process exited
	// Only valid if the Status is Stopped
	ExitedAt time.Time
	Stdin    string
	Stdout   string
	Stderr   string
	Terminal bool
}

type Status int

type Task interface {
	Process

	// Information of the container
	Info() TaskInfo
	// Pause pauses the container process
	Pause(context.Context) error
	// Resume unpauses the container process
	Resume(context.Context) error
	// Exec adds a process into the container
	Exec(context.Context, string, ExecOpts) (Process, error)
	// Pids returns all pids
	Pids(context.Context) ([]ProcessInfo, error)
	// Checkpoint checkpoints a container to an image with live system data
	Checkpoint(context.Context, string, *types.Any) error
	// DeleteProcess deletes a specific exec process via its id
	DeleteProcess(context.Context, string) (*Exit, error)
	// Update sets the provided resources to a running task
	Update(context.Context, *types.Any) error
	// Process returns a process within the task for the provided id
	Process(context.Context, string) (Process, error)
	// Metrics returns runtime specific metrics for a task
	Metrics(context.Context) (interface{}, error)
}

type TaskInfo struct {
	ID        string
	Runtime   string
	Spec      []byte
	Namespace string
}

type TaskList struct {
	// contains filtered or unexported fields
}

type TaskMonitor interface {
	// Monitor adds the provided container to the monitor
	Monitor(Task) error
	// Stop stops and removes the provided container from the monitor
	Stop(Task) error
}