1 files changed, 52 insertions, 0 deletions
diff --git a/devtools/client/accessibility/reducers/simulation.js b/devtools/client/accessibility/reducers/simulation.js
new file mode 100644
index 0000000000..1b68331d93
--- /dev/null
+++ b/devtools/client/accessibility/reducers/simulation.js
@@ -0,0 +1,52 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const {
+  accessibility: { SIMULATION_TYPE },
+} = require("resource://devtools/shared/constants.js");
+const {
+  SIMULATE,
+} = require("resource://devtools/client/accessibility/constants.js");
+
+/**
+ * Initial state definition
+ */
+function getInitialState() {
+  return {
+    [SIMULATION_TYPE.ACHROMATOPSIA]: false,
+    [SIMULATION_TYPE.PROTANOPIA]: false,
+    [SIMULATION_TYPE.DEUTERANOPIA]: false,
+    [SIMULATION_TYPE.TRITANOPIA]: false,
+    [SIMULATION_TYPE.CONTRAST_LOSS]: false,
+  };
+}
+
+function simulation(state = getInitialState(), action) {
+  switch (action.type) {
+    case SIMULATE:
+      if (action.error) {
+        console.warn("Error running simulation", action.error);
+        return state;
+      }
+
+      const simTypes = action.simTypes;
+
+      if (simTypes.length === 0) {
+        return getInitialState();
+      }
+
+      const updatedState = getInitialState();
+      simTypes.forEach(simType => {
+        updatedState[simType] = true;
+      });
+
+      return updatedState;
+    default:
+      return state;
+  }
+}
+
+exports.simulation = simulation;