Implement kick, op and friends.

client.go

@@ -740,6 +740,13 @@ func clientLoop(c *client, conn *websocket.Conn) error {
 
 					}
 				}
+			case sendPermissionsAction:
+				c.write(clientMessage{
+					Type:        "permissions",
+					Permissions: c.permissions,
+				})
+			case kickAction:
+				return userError("you have been kicked")
 			default:
 				log.Printf("unexpected action %T", a)
 				return errors.New("unexpected action")
@@ -754,7 +761,7 @@ func handleClientMessage(c *client, m clientMessage) error {
 	switch m.Type {
 	case "offer":
 		if !c.permissions.Present {
-			return userError("not authorized")
+			return userError("not authorised")
 		}
 		if m.Offer == nil {
 			return protocolError("null offer")
@@ -786,6 +793,24 @@ func handleClientMessage(c *client, m clientMessage) error {
 		for _, cc := range clients {
 			cc.write(m)
 		}
+	case "op", "unop", "present", "unpresent":
+		if !c.permissions.Admin {
+			c.error(userError("not authorised"))
+			return nil
+		}
+		err := setPermission(c.group, m.Id, m.Type)
+		if err != nil {
+			return c.error(err)
+		}
+	case "kick":
+		if !c.permissions.Admin {
+			c.error(userError("not authorised"))
+			return nil
+		}
+		err := kickClient(c.group, m.Id)
+		if err != nil {
+			return c.error(err)
+		}
 	default:
 		log.Printf("unexpected message: %v", m.Type)
 		return protocolError("unexpected message")

group.go

@@ -10,8 +10,8 @@ import (
 	"log"
 	"os"
 	"path/filepath"
-	"sync"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/pion/webrtc/v2"
@@ -84,6 +84,10 @@ type pushTracksAction struct {
 	c *client
 }
 
+type sendPermissionsAction struct{}
+
+type kickAction struct{}
+
 var groups struct {
 	mu     sync.Mutex
 	groups map[string]*group
@@ -117,7 +121,7 @@ func addGroup(name string, desc *groupDescription) (*group, error) {
 
 	g := groups.groups[name]
 	if g == nil {
-		if(desc == nil) {
+		if desc == nil {
 			desc, err = getDescription(name)
 			if err != nil {
 				return nil, err
@@ -235,6 +239,15 @@ func (g *group) getClients(except *client) []*client {
 	return clients
 }
 
+func (g *group) getClientUnlocked(id string) *client {
+	for _, c := range g.clients {
+		if c.id == id {
+			return c
+		}
+	}
+	return nil
+}
+
 func (g *group) Range(f func(c *client) bool) {
 	g.mu.Lock()
 	defer g.mu.Unlock()
@@ -295,7 +308,7 @@ type groupUser struct {
 
 func matchUser(user, pass string, users []groupUser) (bool, bool) {
 	for _, u := range users {
-		if (u.Username == "" || u.Username == user) {
+		if u.Username == "" || u.Username == user {
 			return true, (u.Password == "" || u.Password == pass)
 		}
 	}
@@ -372,22 +385,58 @@ func getPermission(desc *groupDescription, user, pass string) (userPermission, e
 			p.Present = true
 			return p, nil
 		}
-		return p, userError("not authorized")
+		return p, userError("not authorised")
 	}
 	if found, good := matchUser(user, pass, desc.Presenter); found {
 		if good {
 			p.Present = true
 			return p, nil
 		}
-		return p, userError("not authorized")
+		return p, userError("not authorised")
 	}
 	if found, good := matchUser(user, pass, desc.Other); found {
 		if good {
 			return p, nil
 		}
-		return p, userError("not authorized")
+		return p, userError("not authorised")
 	}
-	return p, userError("not authorized")
+	return p, userError("not authorised")
+}
+
+func setPermission(g *group, id string, perm string) error {
+	g.mu.Lock()
+	defer g.mu.Unlock()
+
+	c := g.getClientUnlocked(id)
+	if c == nil {
+		return userError("no such user")
+	}
+
+	switch perm {
+	case "op":
+		c.permissions.Admin = true
+	case "unop":
+		c.permissions.Admin = false
+	case "present":
+		c.permissions.Present = true
+	case "unpresent":
+		c.permissions.Present = false
+	default:
+		return userError("unknown permission")
+	}
+	return c.action(sendPermissionsAction{})
+}
+
+func kickClient(g *group, id string) error {
+	g.mu.Lock()
+	defer g.mu.Unlock()
+
+	c := g.getClientUnlocked(id)
+	if c == nil {
+		return userError("no such user")
+	}
+
+	return c.action(kickAction{})
 }
 
 type publicGroup struct {

static/sfu.js

@@ -15,6 +15,8 @@ let up = {}, down = {};
 
 let iceServers = [];
 
+let permissions = {};
+
 function toHex(array) {
     let a = new Uint8Array(array);
     let s = '';
@@ -515,9 +517,10 @@ function gotUser(id, name, del) {
         addUser(id, name);
 }
 
-function gotPermissions(permissions) {
+function gotPermissions(perm) {
-    document.getElementById('presenterbox').disabled = !permissions.present;
+    permissions = perm;
-    document.getElementById('sharebox').disabled = !permissions.present;
+    document.getElementById('presenterbox').disabled = !perm.present;
+    document.getElementById('sharebox').disabled = !perm.present;
 }
 
 const urlRegexp = /https?:\/\/[-a-zA-Z0-9@:%/._\+~#=?]+[-a-zA-Z0-9@:%/_\+~#=]/g;
@@ -634,14 +637,39 @@ function handleInput() {
             }
 
             switch(cmd) {
-            case '/nick':
-                setNick(rest);
-                storeNick(rest);
-                return;
             case '/me':
                 message = rest;
                 me = true;
                 break;
+            case '/op':
+            case '/unop':
+            case '/kick':
+            case '/present':
+            case '/unpresent':
+                if(!permissions.admin) {
+                    displayError("You're not an administrator");
+                    return;
+                }
+                let id;
+                if(id in users) {
+                    id = rest;
+                } else {
+                    for(let i in users) {
+                        if(users[i] === rest) {
+                            id = i;
+                            break;
+                        }
+                    }
+                }
+                if(!id) {
+                    displayError('Unknown user ' + rest);
+                    return;
+                }
+                send({
+                    type: cmd.slice(1),
+                    id: id,
+                });
+                return;
             default:
                 displayError('Uknown command ' + cmd);
                 return;