fix: restore previous scenario state when its run can't be started

src/state/sagas/scenario/LaunchScenario/LaunchScenario.js

@@ -1,7 +1,7 @@
 // Copyright (c) Cosmo Tech.
 // Licensed under the MIT license.
 import { t } from 'i18next';
-import { takeEvery, call, put } from 'redux-saga/effects';
+import { call, put, select, takeEvery } from 'redux-saga/effects';
 import { AppInsights } from '../../../../services/AppInsights';
 import { Api } from '../../../../services/config/Api';
 import { SCENARIO_RUN_STATE } from '../../../../services/config/ApiConstants';
@@ -10,6 +10,7 @@ import { SCENARIO_ACTIONS_KEY } from '../../../commons/ScenarioConstants';
 import { dispatchSetApplicationErrorMessage } from '../../../dispatchers/app/ApplicationDispatcher';
 
 const appInsights = AppInsights.getInstance();
+const getScenarios = (state) => state.scenario?.list?.data;
 
 export function* launchScenario(action) {
   try {
@@ -19,13 +20,36 @@ export function* launchScenario(action) {
     const scenarioId = action.scenarioId;
     const runStartTime = new Date().getTime();
 
+    const scenarios = yield select(getScenarios);
+    const scenario = scenarios?.find((item) => item.id === scenarioId);
+    if (scenario === undefined) console.warn(`Couldn't retrieve scenario with id "${scenarioId}"`);
+    const previousScenarioState = scenario?.scenarioState;
+
     yield put({
       type: SCENARIO_ACTIONS_KEY.SET_CURRENT_SCENARIO,
       scenario: { state: SCENARIO_RUN_STATE.RUNNING },
     });
 
     // Launch scenario if parameters update succeeded
-    const response = yield call(Api.ScenarioRuns.runScenario, organizationId, workspaceId, scenarioId);
+    let response;
+    try {
+      response = yield call(Api.ScenarioRuns.runScenario, organizationId, workspaceId, scenarioId);
+    } catch (error) {
+      console.error(error);
+      yield put(
+        dispatchSetApplicationErrorMessage(
+          error,
+          t('commoncomponents.banner.run', 'A problem occurred when starting the scenario run.')
+        )
+      );
+      yield put({
+        type: SCENARIO_ACTIONS_KEY.SET_CURRENT_SCENARIO,
+        status: STATUSES.ERROR,
+        scenario: { state: previousScenarioState }, // Do not force scenario state to "Failed", restore previous state
+      });
+      return;
+    }
+
     const newLastRun = {
       csmSimulationRun: response?.data?.csmSimulationRun,
       scenarioRunId: response?.data?.id,