major change of websocket dbmHandler structure

server/models/clients.go

@@ -0,0 +1,82 @@
+package models
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"github.com/coder/websocket"
+	"github.com/gin-gonic/gin"
+)
+
+var Origins []string = []string{"*"}
+
+type Clients map[string]*Client
+
+type Client struct {
+	Connected *bool           `json:"connected"`
+	Conn      *websocket.Conn `json:"-"`
+}
+
+func NewClients() Clients {
+	return make(Clients)
+}
+
+// Connect a recieving websocket connection
+func (c *Clients) ConnectRecievingWsConnection(id string, ctx *gin.Context) error {
+	if _, exists := (*c)[id]; exists {
+		return nil
+	}
+
+	conn, err := websocket.Accept(ctx.Writer, ctx.Request, &websocket.AcceptOptions{
+		OriginPatterns: Origins,
+	})
+
+	if err != nil {
+		return fmt.Errorf("error accept websocket client: %s", err)
+	}
+
+	b := true
+	(*c)[id] = &Client{
+		Connected: &b,
+		Conn:      conn,
+	}
+	return nil
+}
+
+// Connect a recieving websocket connection
+func (c *Clients) ConnectSendingWsConnection(id, url string) (*websocket.Conn, error) {
+	if _, exists := (*c)[id]; exists {
+		return (*c)[id].Conn, nil
+	}
+
+	header := http.Header{}
+	header.Set("Authorization", "Bearer "+id)
+
+	conn, _, err := websocket.Dial(context.Background(), url, &websocket.DialOptions{
+		HTTPHeader: header,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	b := true
+	(*c)[id] = &Client{
+		Connected: &b,
+		Conn:      conn,
+	}
+	return conn, nil
+}
+
+func (c *Clients) RemoveClient(id string) {
+	delete(*c, id)
+}
+
+func (c *Clients) GetClientPointer(id string) *bool {
+	return (*c)[id].Connected
+}
+
+func (c *Clients) DisconnectWsConnection(id string, code websocket.StatusCode, reason string) {
+	*(*c)[id].Connected = false
+	(*c)[id].Conn.Close(code, reason)
+}