X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=server%2Fcontrol.c;h=d9a7dc6fa9542acbdb50f290da0408577f326ce4;hb=436f212a07c30061ccca52ff0c107ccf99921d83;hp=7b07ea33557822b7b82ceb1f9fc50f56ba314e73;hpb=3a85bddfca280f46d675f4987615c65089c80f44;p=matches%2FMCTX3420.git

diff --git a/server/control.c b/server/control.c
index 7b07ea3..d9a7dc6 100644
--- a/server/control.c
+++ b/server/control.c
@@ -15,12 +15,14 @@ typedef struct ControlData {
 
 ControlData g_controls = {CONTROL_STOP, PTHREAD_MUTEX_INITIALIZER, {0}};
 
-static bool ExperimentExists(const char *experiment_name) {
-	FILE *fp = fopen(experiment_name, "r");
-	if (!fp)
-		return false;
-	fclose(fp);
-	return true;
+bool PathExists(const char *path) 
+{
+	FILE *fp = fopen(path, "r");
+	if (fp) {
+		fclose(fp);
+		return true;
+	}
+	return false;
 }
 
 /**
@@ -30,56 +32,47 @@ static bool ExperimentExists(const char *experiment_name) {
  * @param params The input parameters
  */
 void Control_Handler(FCGIContext *context, char *params) {
-	const char *action, *key = "", *name = "";
+	const char *action = "";
+	const char *name = "";
 	bool force = false;
 	ControlModes desired_mode;
 
-	FCGIValue values[4] = {
+
+	// Login/auth now handled entirely in fastcgi.c and login.c
+	//TODO: Need to not have the ability for any user to stop someone else' experiment...
+	// (achieve by storing the username of the person running the current experiment, even when they log out?)
+	// (Our program should only realisitically support a single experiment at a time, so that should be sufficient)
+	FCGIValue values[3] = {
 		{"action", &action, FCGI_REQUIRED(FCGI_STRING_T)},
-		{"key", &key, FCGI_STRING_T},
 		{"force", &force, FCGI_BOOL_T},
 		{"name", &name, FCGI_STRING_T}
 	};
 
-	if (!FCGI_ParseRequest(context, params, values, 4))
+	if (!FCGI_ParseRequest(context, params, values, 3))
 		return;
 	
-	if (!strcmp(action, "lock")) {
-		FCGI_LockControl(context, force);
-		return;
-	} else if (!strcmp(action, "emergency")) {
+	if (!strcmp(action, "emergency")) {
 		desired_mode = CONTROL_EMERGENCY;
-	} else if (FCGI_HasControl(context, key)) {
-		if (!strcmp(action, "release")) {
-			FCGI_ReleaseControl(context);
-		} else if (!strcmp(action, "start")) {
-			desired_mode = CONTROL_START;
-		} else if (!strcmp(action, "pause")) {
-			desired_mode = CONTROL_PAUSE;
-		} else if (!strcmp(action, "resume")) {
-			desired_mode = CONTROL_RESUME;
-		} else if (!strcmp(action, "stop")) {
-			desired_mode = CONTROL_STOP;
-		} else {
-			FCGI_RejectJSON(context, "Unknown action specified.");
-			return;
-		}
+	} else if (!strcmp(action, "start")) {
+		desired_mode = CONTROL_START;
+	} else if (!strcmp(action, "pause")) {
+		desired_mode = CONTROL_PAUSE;
+	} else if (!strcmp(action, "resume")) {
+		desired_mode = CONTROL_RESUME;
+	} else if (!strcmp(action, "stop")) {
+		desired_mode = CONTROL_STOP; 
 	} else {
-		FCGI_RejectJSONEx(context, STATUS_UNAUTHORIZED, 
-			"Invalid control key specified.");
+		FCGI_RejectJSON(context, "Unknown action specified.");
 		return;
 	}
-
+	
 	void *arg = NULL;
 	if (desired_mode == CONTROL_START) {
-		int len = strlen(name);
-		if (len <= 0) {
-			FCGI_RejectJSON(context, "An experiment name must be specified.");
-			return;
-		} else if (ExperimentExists(name) && !force) {
+		if (PathExists(name) && !force) {
 			FCGI_RejectJSON(context, "An experiment with that name already exists.");
 			return;
 		}
+
 		arg = (void*)name;
 	}
 
@@ -104,65 +97,79 @@ const char* Control_SetMode(ControlModes desired_mode, void * arg)
 	const char *ret = NULL;
 
 	pthread_mutex_lock(&(g_controls.mutex));
-	if (g_controls.current_mode == CONTROL_EMERGENCY) {
-		ret = "In emergency mode. Restart software.";
-	} else if (g_controls.current_mode == desired_mode) {
-		ret = "Already in desired mode.";
-	} else if (desired_mode == CONTROL_START) {
-		if (g_controls.current_mode == CONTROL_STOP) {
-			FILE *fp = fopen((const char*) arg, "a");
-			if (fp) {
-				fclose(fp);
-				gettimeofday(&(g_controls.start_time), NULL);
-			} else {
-				ret = "Failed to create experiment placeholder";
-			}
-		} else {
-			ret = "Cannot start when not in a stopped state.";
-		}
-	} else if (desired_mode == CONTROL_RESUME) {
-		if (g_controls.current_mode != CONTROL_PAUSE)
-			ret = "Cannot resume when not in a paused state.";
+	if (g_controls.current_mode == desired_mode)
+		ret = "Already in the desired mode.";
+	else if (g_controls.current_mode == CONTROL_EMERGENCY && desired_mode != CONTROL_STOP)
+		ret = "In emergency mode. You must stop before continuing.";
+	else switch (desired_mode) {
+		case CONTROL_START:
+			if (g_controls.current_mode == CONTROL_STOP) {
+				const char * name = arg;
+				if (!*name)
+					ret = "An experiment name must be specified";
+				else if (strpbrk(name, INVALID_CHARACTERS))
+					ret = "The experiment name must not contain: " INVALID_CHARACTERS_JSON;
+				else {
+					FILE *fp = fopen((const char*) arg, "a");
+					if (fp) {
+						fclose(fp);
+						gettimeofday(&(g_controls.start_time), NULL);
+					} else
+						ret = "Cannot open experiment name marker";
+				}
+			} else 
+				ret = "Cannot start when not in a stopped state.";
+		break;
+		case CONTROL_PAUSE:
+			if (g_controls.current_mode != CONTROL_START)
+				ret = "Cannot pause when not in a running state.";
+		break;
+		case CONTROL_RESUME:
+			if (g_controls.current_mode != CONTROL_PAUSE)
+				ret = "Cannot resume when not in a paused state.";
+		break;
+		case CONTROL_EMERGENCY:
+			if (g_controls.current_mode != CONTROL_START) //pfft
+				ret = "Not running so how can there be an emergency.";
+		break;
+		default:
+		break;
 	}
 	
 	if (ret == NULL) {
 		Actuator_SetModeAll(desired_mode, arg);
 		Sensor_SetModeAll(desired_mode, arg);
-		g_controls.current_mode = desired_mode;
+		if (desired_mode != CONTROL_RESUME)
+			g_controls.current_mode = desired_mode;
+		else
+			g_controls.current_mode = CONTROL_START;
 	}
 	pthread_mutex_unlock(&(g_controls.mutex));
 	return ret;
 }
 
 /**
- * Gets the current mode.
- * @return The current mode
+ * Gets a string representation of the current mode
+ * @param mode The mode to get a string representation of
+ * @return The string representation of the mode
  */
-ControlModes Control_GetMode() {
-	ControlModes ret;
-	pthread_mutex_lock(&(g_controls.mutex));
-	ret = g_controls.current_mode;
-	pthread_mutex_unlock(&(g_controls.mutex));
-	return ret;
-}
+const char * Control_GetModeName() {
+	const char * ret = "Unknown";
 
-/*
-bool Control_Lock() {
-	pthread_mutex_lock(&(g_controls.mutex));
-	if (g_controls.state == STATE_RUNNING || g_controls.state == STATE_PAUSED)
-		return true;
-	pthread_mutex_unlock(&(g_controls.mutex));
-	return false;
+	switch (g_controls.current_mode) {
+		case CONTROL_START: ret = "Running"; break;
+		case CONTROL_PAUSE: ret = "Paused"; break;
+		case CONTROL_RESUME: ret = "Resumed"; break;
+		case CONTROL_STOP: ret = "Stopped"; break;
+		case CONTROL_EMERGENCY: ret = "Emergency mode"; break;
+	}
+	return ret;
 }
 
-void Control_Unlock() {
-	pthread_mutex_unlock(&(g_controls.mutex));
-}*/
-
 /**
  * Gets the start time for the current experiment
  * @return the start time
  */
 const struct timeval* Control_GetStartTime() {
 	return &g_controls.start_time;
-}
\ No newline at end of file
+}