Adds auto-answer mode to sipgw, activated through http-api.

src/main/kotlin/org/jitsi/jibri/selenium/pageobjects/CallPage.kt

@@ -222,6 +222,13 @@ class CallPage(driver: RemoteWebDriver) : AbstractPageObject(driver) {
                 return e.message;
             }
         """.trimMargin())
+
+        // Let's wait till we are alone in the room
+        // (give time for the js Promise to finish before quiting selenium)
+        WebDriverWait(driver, 2).until {
+            getNumParticipants() == 1
+        }
+
         return when (result) {
             is String -> false
             else -> true

src/main/kotlin/org/jitsi/jibri/service/impl/SipGatewayJibriService.kt

@@ -27,6 +27,7 @@ import org.jitsi.jibri.sipgateway.pjsua.PjsuaClient
 import org.jitsi.jibri.sipgateway.pjsua.PjsuaClientParams
 import org.jitsi.jibri.status.ComponentState
 import org.jitsi.jibri.util.whenever
+import java.time.Duration
 import java.util.concurrent.ScheduledFuture
 
 data class SipGatewayServiceParams(
@@ -44,7 +45,7 @@ data class SipGatewayServiceParams(
 /**
  * A [JibriService] responsible for joining both a web call
  * and a SIP call, capturing the audio and video from each, and
- * forwarding thenm to the other side.
+ * forwarding them to the other side.
  */
 class SipGatewayJibriService(
     private val sipGatewayServiceParams: SipGatewayServiceParams
@@ -55,6 +56,8 @@ class SipGatewayJibriService(
     private val jibriSelenium = JibriSelenium(
         JibriSeleniumOptions(
             displayName = sipGatewayServiceParams.sipClientParams.displayName,
+            // by default we wait 30 minutes alone in the call before deciding to hangup
+            emptyCallTimeout = Duration.ofMinutes(30),
             extraChromeCommandLineFlags = listOf("--alsa-input-device=plughw:1,1"))
     )
     /**
@@ -85,8 +88,15 @@ class SipGatewayJibriService(
     override fun start() {
         jibriSelenium.joinCall(
             sipGatewayServiceParams.callParams.callUrlInfo.copy(urlParams = SIP_GW_URL_OPTIONS))
-        whenever(jibriSelenium).transitionsTo(ComponentState.Running) {
+
+        // when in auto-answer mode we want to start as quick as possible as
+        // we will be waiting for a sip call to come
+        if (sipGatewayServiceParams.sipClientParams.autoAnswer) {
             pjsuaClient.start()
+        } else {
+            whenever(jibriSelenium).transitionsTo(ComponentState.Running) {
+                pjsuaClient.start()
+            }
         }
     }
 

src/main/kotlin/org/jitsi/jibri/sipgateway/SipClient.kt

@@ -29,7 +29,12 @@ data class SipClientParams(
      * The display name we'll use for the web conference
      * in the pjsua call
      */
-    val displayName: String = ""
+    val displayName: String = "",
+    /**
+     * Whether auto-answer is enabled, if it is, the client will listen for
+     * incoming invites and will auto answer the first one.
+     */
+    val autoAnswer: Boolean = false
 )
 
 abstract class SipClient : StatusPublisher<ComponentState>() {

src/main/kotlin/org/jitsi/jibri/sipgateway/pjsua/PjsuaClient.kt

@@ -59,15 +59,23 @@ class PjsuaClient(private val pjsuaClientParams: PjsuaClientParams) : SipClient(
     }
 
     override fun start() {
-        val command = listOf(
+        val command = mutableListOf(
                 "pjsua",
                 "--capture-dev=$CAPTURE_DEVICE",
                 "--playback-dev=$PLAYBACK_DEVICE",
                 "--id", "${pjsuaClientParams.sipClientParams.displayName} <sip:jibri@127.0.0.1>",
                 "--config-file", CONFIG_FILE_LOCATION,
                 "--log-file", "/tmp/pjsua.out",
-                "sip:${pjsuaClientParams.sipClientParams.sipAddress}"
+                "--max-calls=1"
         )
+
+        if (pjsuaClientParams.sipClientParams.autoAnswer) {
+            command.add("--auto-answer-timer=30")
+            command.add("--auto-answer=200")
+        } else {
+            command.add("sip:${pjsuaClientParams.sipClientParams.sipAddress}")
+        }
+
         pjsua.launch(command, mapOf("DISPLAY" to X_DISPLAY))
     }