rewritten actions

src/actions/SelectedAccountActions.js

@@ -1,12 +1,8 @@
 /* @flow */
 
-
-import { LOCATION_CHANGE } from 'react-router-redux';
 import * as ACCOUNT from 'actions/constants/account';
-import * as NOTIFICATION from 'actions/constants/notification';
-import * as PENDING from 'actions/constants/pendingTx';
-
-import * as stateUtils from 'reducers/utils';
+import * as reducerUtils from 'reducers/utils';
+import { initialState } from 'reducers/SelectedAccountReducer';
 
 import type {
     AsyncAction,
@@ -16,60 +12,191 @@ import type {
     State,
 } from 'flowtype';
 
+type SelectedAccountState = $ElementType<State, 'selectedAccount'>;
+
 export type SelectedAccountAction = {
     type: typeof ACCOUNT.DISPOSE,
 } | {
     type: typeof ACCOUNT.UPDATE_SELECTED_ACCOUNT,
-    payload: $ElementType<State, 'selectedAccount'>
+    payload: SelectedAccountState,
 };
 
+type AccountStatus = {
+    type: string;
+    title: string;
+    message?: string;
+    visible: boolean;
+}
+
 export const dispose = (): Action => ({
     type: ACCOUNT.DISPOSE,
 });
 
-export const updateSelectedValues = (prevState: State, action: Action): AsyncAction => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
-    const locationChange: boolean = action.type === LOCATION_CHANGE;
+const getAccountStatus = (state: State, selectedAccount: SelectedAccountState): ?AccountStatus => {
+    const device = state.wallet.selectedDevice;
+    if (!device || !device.state) {
+        return {
+            type: 'info',
+            title: 'Loading device...',
+            visible: false,
+        };
+    }
+
+    const {
+        account,
+        discovery,
+        network,
+    } = selectedAccount;
+
+    // corner case: accountState didn't finish loading state after LOCATION_CHANGE action
+    if (!network) {
+        return {
+            type: 'info',
+            title: 'Loading account state...',
+            visible: false,
+        };
+    }
+
+    const blockchain = state.blockchain.find(b => b.name === network.network);
+    if (blockchain && !blockchain.connected) {
+        return {
+            type: 'backend',
+            title: 'Backend is not connected',
+            visible: false,
+        };
+    }
+
+    // account not found (yet). checking why...
+    if (!account) {
+        if (!discovery || discovery.waitingForDevice) {
+            if (device.connected) {
+                // case 1: device is connected but discovery not started yet (probably waiting for auth)
+                if (device.available) {
+                    return {
+                        type: 'info',
+                        title: 'Loading accounts...',
+                        visible: false,
+                    };
+                }
+                // case 2: device is unavailable (created with different passphrase settings) account cannot be accessed
+                return {
+                    type: 'info',
+                    title: `Device ${device.instanceLabel} is unavailable`,
+                    message: 'Change passphrase settings to use this device',
+                    visible: false,
+                };
+            }
+
+            // case 3: device is disconnected
+            return {
+                type: 'info',
+                title: `Device ${device.instanceLabel} is disconnected`,
+                message: 'Connect device to load accounts',
+                visible: false,
+            };
+        }
+
+        if (discovery.completed) {
+            // case 4: account not found and discovery is completed
+            return {
+                type: 'warning',
+                title: 'Account does not exist',
+                visible: false,
+            };
+        }
+
+        // case 6: discovery is not completed yet
+        return {
+            type: 'info',
+            title: 'Loading accounts...',
+            visible: false,
+        };
+    }
+
+    // Additional status: account does exists and it's visible but shouldn't be active
+    if (!device.connected) {
+        return {
+            type: 'info',
+            title: `Device ${device.instanceLabel} is disconnected`,
+            visible: true,
+        };
+    }
+    if (!device.available) {
+        return {
+            type: 'info',
+            title: `Device ${device.instanceLabel} is unavailable`,
+            message: 'Change passphrase settings to use this device',
+            visible: true,
+        };
+    }
+
+    // Additional status: account does exists, but waiting for discovery to complete
+    if (discovery && !discovery.completed) {
+        return {
+            type: 'info',
+            title: 'Loading accounts...',
+            visible: true,
+        };
+    }
+
+    return null;
+};
+
+export const observe = (prevState: State, action: Action): AsyncAction => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
+    // ignore actions dispatched from this process
+    if (action.type === ACCOUNT.UPDATE_SELECTED_ACCOUNT) {
+        return;
+    }
+
     const state: State = getState();
     const { location } = state.router;
+    if (!location.state.account) {
+        // displayed route is not an account route
+        if (state.selectedAccount.location.length > 1) {
+            // reset "selectedAccount" reducer to default
+            dispatch({
+                type: ACCOUNT.UPDATE_SELECTED_ACCOUNT,
+                payload: initialState,
+            });
+        }
+        return;
+    }
 
-    // handle devices state change (from trezor-connect events or location change)
-    if (locationChange
-            || prevState.accounts !== state.accounts
-            || prevState.discovery !== state.discovery
-            || prevState.tokens !== state.tokens
-            || prevState.pending !== state.pending) {
-        const account = stateUtils.getSelectedAccount(state);
-        const network = stateUtils.getSelectedNetwork(state);
-        const discovery = stateUtils.getDiscoveryProcess(state);
-        const tokens = stateUtils.getAccountTokens(state, account);
-        const pending = stateUtils.getAccountPendingTx(state.pending, account);
+    // get new values for selected account
+    const account = reducerUtils.getSelectedAccount(state);
+    const network = reducerUtils.getSelectedNetwork(state);
+    const discovery = reducerUtils.getDiscoveryProcess(state);
+    const tokens = reducerUtils.getAccountTokens(state, account);
+    const pending = reducerUtils.getAccountPendingTx(state.pending, account);
 
-        const payload: $ElementType<State, 'selectedAccount'> = {
-            location: location.pathname,
+    // prepare new state for "selectedAccount" reducer
+    const newState: SelectedAccountState = {
+        location: state.router.location.pathname,
         account,
         network,
         discovery,
         tokens,
         pending,
+        notification: null,
+        visible: false,
     };
 
-        let needUpdate: boolean = false;
-        Object.keys(payload).forEach((key) => {
-            if (Array.isArray(payload[key])) {
-                if (Array.isArray(state.selectedAccount[key]) && payload[key].length !== state.selectedAccount[key].length) {
-                    needUpdate = true;
-                }
-            } else if (payload[key] !== state.selectedAccount[key]) {
-                needUpdate = true;
-            }
-        });
+    // get "selectedAccount" status from newState
+    const status = getAccountStatus(state, newState);
+    newState.notification = status || null;
+    newState.visible = status ? status.visible : true;
 
-        if (needUpdate) {
+    // check if newState is different than previous state
+    const stateChanged = reducerUtils.observeChanges(prevState.selectedAccount, newState, ['location', 'account', 'network', 'discovery', 'tokens', 'pending', 'status', 'visible']);
+    if (stateChanged) {
+        // update values in reducer
         dispatch({
             type: ACCOUNT.UPDATE_SELECTED_ACCOUNT,
-                payload,
+            payload: newState,
         });
 
+        // TODO: move this to send account actions
+        /*
         if (location.state.send) {
             const rejectedTxs = pending.filter(tx => tx.rejected);
             rejectedTxs.forEach((tx) => {
@@ -95,6 +222,6 @@ export const updateSelectedValues = (prevState: State, action: Action): AsyncAct
                 });
             });
         }
-        }
+        */
     }
 };

src/actions/WalletActions.js

@@ -1,9 +1,7 @@
 /* @flow */
 
-
-import { LOCATION_CHANGE } from 'react-router-redux';
 import * as WALLET from 'actions/constants/wallet';
-import * as stateUtils from 'reducers/utils';
+import * as reducerUtils from 'reducers/utils';
 
 import type {
     Device,
@@ -81,15 +79,20 @@ export const clearUnavailableDevicesData = (prevState: State, device: Device): T
 };
 
 
-export const updateSelectedValues = (prevState: State, action: Action): AsyncAction => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
-    const locationChange: boolean = action.type === LOCATION_CHANGE;
+export const observe = (prevState: State, action: Action): AsyncAction => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
+    // ignore actions dispatched from this process
+    if (action.type === WALLET.SET_SELECTED_DEVICE || action.type === WALLET.UPDATE_SELECTED_DEVICE) {
+        return;
+    }
     const state: State = getState();
 
+    const locationChanged = reducerUtils.observeChanges(prevState.router.location, state.router.location, ['pathname']);
+    const device = reducerUtils.getSelectedDevice(state);
+    const selectedDeviceChanged = reducerUtils.observeChanges(state.wallet.selectedDevice, device);
+    
     // handle devices state change (from trezor-connect events or location change)
-    if (locationChange || prevState.devices !== state.devices) {
-        const device = stateUtils.getSelectedDevice(state);
-        if (state.wallet.selectedDevice !== device) {
-            if (device && stateUtils.isSelectedDevice(state.wallet.selectedDevice, device)) {
+    if (locationChanged || selectedDeviceChanged) {
+        if (device && reducerUtils.isSelectedDevice(state.wallet.selectedDevice, device)) {
             dispatch({
                 type: WALLET.UPDATE_SELECTED_DEVICE,
                 device,
@@ -101,5 +104,4 @@ export const updateSelectedValues = (prevState: State, action: Action): AsyncAct
             });
         }
     }
-    }
 };

src/reducers/SelectedAccountReducer.js

@@ -11,12 +11,18 @@ import type {
 } from 'flowtype';
 
 export type State = {
-    location?: string;
+    location: string;
     account: ?Account;
     network: ?Coin;
     tokens: Array<Token>,
     pending: Array<PendingTx>,
-    discovery: ?Discovery
+    discovery: ?Discovery,
+    notification: ?{
+        type: string,
+        title: string,
+        message?: string,
+    },
+    visible: boolean,
 };
 
 export const initialState: State = {
@@ -26,6 +32,8 @@ export const initialState: State = {
     tokens: [],
     pending: [],
     discovery: null,
+    notification: null,
+    visible: false,
 };
 
 export default (state: State = initialState, action: Action): State => {

src/reducers/utils/index.js

@@ -128,6 +128,7 @@ export const observeChanges = (prev: ?(Object | Array<any>), current: ?(Object |
         if (prev instanceof Object && current instanceof Object) {
             for (let i = 0; i < fields.length; i++) {
                 const key = fields[i];
+                if (Array.isArray(prev[key]) && Array.isArray(current[key])) return prev[key].length !== current[key].length;
                 if (prev[key] !== current[key]) return true;
             }
         }

src/services/WalletService.js

@@ -92,10 +92,10 @@ const WalletService: Middleware = (api: MiddlewareAPI) => (next: MiddlewareDispa
     api.dispatch(SendFormActionActions.observe(prevState, action));
 
     // update common values in WallerReducer
-    api.dispatch(WalletActions.updateSelectedValues(prevState, action));
+    api.dispatch(WalletActions.observe(prevState, action));
 
     // update common values in SelectedAccountReducer
-    api.dispatch(SelectedAccountActions.updateSelectedValues(prevState, action));
+    api.dispatch(SelectedAccountActions.observe(prevState, action));
 
     return action;
 };