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authorSebastien Douheret <sebastien.douheret@iot.bzh>2017-09-25 14:15:16 +0200
committerSebastien Douheret <sebastien.douheret@iot.bzh>2017-10-06 18:25:04 +0200
commit97ca1f277dc8b6973d6fa67add5593a9c395ce60 (patch)
tree761649d7771e8699a67567476c17fb2fa0e28e57 /lib/agent/events.go
parent12a20d0905b0d3e7e0f4c9ec8ee619f683256d71 (diff)
Added webapp Dashboard + logic to interact with server.
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>
Diffstat (limited to 'lib/agent/events.go')
-rw-r--r--lib/agent/events.go131
1 files changed, 131 insertions, 0 deletions
diff --git a/lib/agent/events.go b/lib/agent/events.go
new file mode 100644
index 0000000..24efc5a
--- /dev/null
+++ b/lib/agent/events.go
@@ -0,0 +1,131 @@
+package agent
+
+import (
+ "fmt"
+ "time"
+)
+
+// Events constants
+const (
+ // EventTypePrefix Used as event prefix
+ EventTypePrefix = "event:" // following by event type
+
+ // Supported Events type
+ EVTAll = "all"
+ EVTServerConfig = "server-config" // data type ServerCfg
+ EVTProjectAdd = "project-add" // data type ProjectConfig
+ EVTProjectDelete = "project-delete" // data type ProjectConfig
+ EVTProjectChange = "project-state-change" // data type ProjectConfig
+)
+
+var EVTAllList = []string{
+ EVTServerConfig,
+ EVTProjectAdd,
+ EVTProjectDelete,
+ EVTProjectChange,
+}
+
+// EventMsg Message send
+type EventMsg struct {
+ Time string `json:"time"`
+ Type string `json:"type"`
+ Data interface{} `json:"data"`
+}
+
+type EventDef struct {
+ // SEB cbs []EventsCB
+ sids map[string]int
+}
+
+type Events struct {
+ *Context
+ eventsMap map[string]*EventDef
+}
+
+// NewEvents creates an instance of Events
+func NewEvents(ctx *Context) *Events {
+ evMap := make(map[string]*EventDef)
+ for _, ev := range EVTAllList {
+ evMap[ev] = &EventDef{
+ sids: make(map[string]int),
+ }
+ }
+ return &Events{
+ Context: ctx,
+ eventsMap: evMap,
+ }
+}
+
+// GetList returns the list of all supported events
+func (e *Events) GetList() []string {
+ return EVTAllList
+}
+
+// Register Used by a client/session to register to a specific (or all) event(s)
+func (e *Events) Register(evName, sessionID string) error {
+ evs := EVTAllList
+ if evName != EVTAll {
+ if _, ok := e.eventsMap[evName]; !ok {
+ return fmt.Errorf("Unsupported event type name")
+ }
+ evs = []string{evName}
+ }
+ for _, ev := range evs {
+ e.eventsMap[ev].sids[sessionID]++
+ }
+ return nil
+}
+
+// UnRegister Used by a client/session to unregister event(s)
+func (e *Events) UnRegister(evName, sessionID string) error {
+ evs := EVTAllList
+ if evName != EVTAll {
+ if _, ok := e.eventsMap[evName]; !ok {
+ return fmt.Errorf("Unsupported event type name")
+ }
+ evs = []string{evName}
+ }
+ for _, ev := range evs {
+ if _, exist := e.eventsMap[ev].sids[sessionID]; exist {
+ delete(e.eventsMap[ev].sids, sessionID)
+ break
+ }
+ }
+ return nil
+}
+
+// Emit Used to manually emit an event
+func (e *Events) Emit(evName string, data interface{}) error {
+ var firstErr error
+
+ if _, ok := e.eventsMap[evName]; !ok {
+ return fmt.Errorf("Unsupported event type")
+ }
+
+ e.Log.Debugf("Emit Event %s: %v", evName, data)
+
+ firstErr = nil
+ evm := e.eventsMap[evName]
+ for sid := range evm.sids {
+ so := e.webServer.sessions.IOSocketGet(sid)
+ if so == nil {
+ if firstErr == nil {
+ firstErr = fmt.Errorf("IOSocketGet return nil")
+ }
+ continue
+ }
+ msg := EventMsg{
+ Time: time.Now().String(),
+ Type: evName,
+ Data: data,
+ }
+ if err := (*so).Emit(EventTypePrefix+evName, msg); err != nil {
+ e.Log.Errorf("WS Emit %v error : %v", EventTypePrefix+evName, err)
+ if firstErr == nil {
+ firstErr = err
+ }
+ }
+ }
+
+ return firstErr
+}