Improve instance management

server/pkg/instance.go

@@ -1,12 +1,52 @@
 package llamactl
 
 import (
+	"context"
+	"io"
+	"os/exec"
+	"sync"
+
 	"github.com/google/uuid"
 )
 
 type Instance struct {
 	ID      uuid.UUID
-	Port    int
-	Status  string
+	Args    []string
 	Options *InstanceOptions
+
+	// Status
+	Running bool
+
+	// Output channels
+	StdOut chan string // Channel for sending output messages
+	StdErr chan string // Channel for sending error messages
+
+	// internal
+	cmd    *exec.Cmd          // Command to run the instance
+	ctx    context.Context    // Context for managing the instance lifecycle
+	cancel context.CancelFunc // Function to cancel the context
+	stdout io.ReadCloser      // Standard output stream
+	stderr io.ReadCloser      // Standard error stream
+	mu     sync.Mutex         // Mutex for synchronizing access to the instance
+}
+
+func NewInstance(id uuid.UUID, options *InstanceOptions) *Instance {
+	return &Instance{
+		ID:      id,
+		Args:    options.BuildCommandArgs(),
+		Options: options,
+
+		Running: false,
+
+		StdOut: make(chan string, 100),
+		StdErr: make(chan string, 100),
+	}
+}
+
+func (i *Instance) Start() *exec.Cmd {
+	args := i.Options.BuildCommandArgs()
+	cmd := exec.Command("llama-server", args...)
+
+	cmd.Start()
+	return cmd
 }