Adds toggle for primary currency (#5421)

* Add UnitInput component

* Add CurrencyInput component

* Add UserPreferencedCurrencyInput component

* Add UserPreferencedCurrencyDisplay component

* Add updatePreferences action

* Add styles for CurrencyInput, CurrencyDisplay, and UnitInput

* Update SettingsTab page with Primary Currency toggle

* Refactor currency displays and inputs to use UserPreferenced displays and inputs

* Add TokenInput component

* Add UserPreferencedTokenInput component

* Use TokenInput in the send screen

* Fix unit tests

* Fix e2e and integration tests

* Remove send/CurrencyDisplay component

* Replace diamond unicode character with Eth logo. Fix typos

1 files changed, 36 insertions, 0 deletions

diff --git a/ui/app/actions.js b/ui/app/actions.js
index eea581d33..f8a375e2f 100644
--- a/ui/app/actions.js
+++ b/ui/app/actions.js
@@ -305,6 +305,12 @@ var actions = {
   updateFeatureFlags,
   UPDATE_FEATURE_FLAGS: 'UPDATE_FEATURE_FLAGS',
 
+  // Preferences
+  setPreference,
+  updatePreferences,
+  UPDATE_PREFERENCES: 'UPDATE_PREFERENCES',
+  setUseETHAsPrimaryCurrencyPreference,
+
   setMouseUserState,
   SET_MOUSE_USER_STATE: 'SET_MOUSE_USER_STATE',
 
@@ -2298,6 +2304,36 @@ function updateFeatureFlags (updatedFeatureFlags) {
   }
 }
 
+function setPreference (preference, value) {
+  return dispatch => {
+    dispatch(actions.showLoadingIndication())
+    return new Promise((resolve, reject) => {
+      background.setPreference(preference, value, (err, updatedPreferences) => {
+        dispatch(actions.hideLoadingIndication())
+
+        if (err) {
+          dispatch(actions.displayWarning(err.message))
+          return reject(err)
+        }
+
+        dispatch(actions.updatePreferences(updatedPreferences))
+        resolve(updatedPreferences)
+      })
+    })
+  }
+}
+
+function updatePreferences (value) {
+  return {
+    type: actions.UPDATE_PREFERENCES,
+    value,
+  }
+}
+
+function setUseETHAsPrimaryCurrencyPreference (value) {
+  return setPreference('useETHAsPrimaryCurrency', value)
+}
+
 function setNetworkNonce (networkNonce) {
   return {
     type: actions.SET_NETWORK_NONCE,