1 files changed, 49 insertions, 0 deletions
diff --git a/frontend/src/actions/simulation/tick.js b/frontend/src/actions/simulation/tick.js
new file mode 100644
index 00000000..a629b340
--- /dev/null
+++ b/frontend/src/actions/simulation/tick.js
@@ -0,0 +1,49 @@
+import { getDatacenterIdOfTick } from "../../util/timeline";
+import { setCurrentDatacenter } from "../topology/building";
+
+export const GO_TO_TICK = "GO_TO_TICK";
+export const SET_LAST_SIMULATED_TICK = "SET_LAST_SIMULATED_TICK";
+
+export function incrementTick() {
+  return (dispatch, getState) => {
+    const { currentTick } = getState();
+    dispatch(goToTick(currentTick + 1));
+  };
+}
+
+export function goToTick(tick) {
+  return (dispatch, getState) => {
+    const state = getState();
+
+    let sections = [];
+    if (state.currentExperimentId !== -1) {
+      const sectionIds =
+        state.objects.path[
+          state.objects.experiment[state.currentExperimentId].pathId
+        ].sectionIds;
+
+      if (sectionIds) {
+        sections = sectionIds.map(
+          sectionId => state.objects.section[sectionId]
+        );
+      }
+    }
+
+    const newDatacenterId = getDatacenterIdOfTick(tick, sections);
+    if (state.currentDatacenterId !== newDatacenterId) {
+      dispatch(setCurrentDatacenter(newDatacenterId));
+    }
+
+    dispatch({
+      type: GO_TO_TICK,
+      tick
+    });
+  };
+}
+
+export function setLastSimulatedTick(tick) {
+  return {
+    type: SET_LAST_SIMULATED_TICK,
+    tick
+  };
+}