move containermap to own file

containermap.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"strings"
+
+	"github.com/fsouza/go-dockerclient"
+)
+
+func NewContainerMap() *ContainerMap {
+	return &ContainerMap{
+		containers: make(map[string]*Container),
+		sortField:  "cpu",
+	}
+}
+
+type ContainerMap struct {
+	containers map[string]*Container
+	sortField  string
+}
+
+// Return number of containers/rows
+func (cm *ContainerMap) Len() uint {
+	return uint(len(cm.containers))
+}
+
+func (cm *ContainerMap) Add(c docker.APIContainers) {
+	id := c.ID[:12]
+	name := strings.Replace(c.Names[0], "/", "", 1) // use primary container name
+	cm.containers[id] = &Container{
+		id:      id,
+		done:    make(chan bool),
+		stats:   make(chan *docker.Stats),
+		widgets: NewWidgets(cid, name),
+		reader:  &StatReader{},
+	}
+}
+
+// Get a single container, by ID
+func (cm *ContainerMap) Get(id string) *Container {
+	return cm.containers[id]
+}
+
+// Return array of all containers
+func (cm *ContainerMap) All() []*Container {
+	var containers []*Container
+	for _, c := range cm.containers {
+		containers = append(containers, c)
+	}
+	return containers
+}