From 73f7f5f164e98bb3034babd5679b0ebca3cd51c0 Mon Sep 17 00:00:00 2001
From: Matt Kunze <matt.kunze@datasplice.com>
Date: Tue, 17 Nov 2015 21:55:11 -0700
Subject: [PATCH] Add replacePath functionality

Pretty much the same as updatePath except it replaces the current
path in history rather than appending a new entry

Fixes jlongster/redux-simple-router#32
---
 README.md    |  5 +++++
 src/index.js | 21 ++++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 61e9049..520ae79 100644
--- a/README.md
+++ b/README.md
@@ -150,3 +150,8 @@ to this and all future URL changes. Pass `false` to make it start
 reacting again. This is useful if replaying snapshots while using the
 `forceRefresh` option of the browser history which forces full
 reloads. It's a rare edge case.
+
+### `replacePath(path)`
+
+Similar to `updatePath` except it replaces the current path in the browser
+history instead of adding a new entry.
diff --git a/src/index.js b/src/index.js
index 8cfb52e..b4f0bcb 100644
--- a/src/index.js
+++ b/src/index.js
@@ -4,7 +4,7 @@
 const UPDATE_PATH = "@@router/UPDATE_PATH";
 const SELECT_STATE = state => state.routing;
 
-// Action creator
+// Action creators
 
 function updatePath(path, noRouterUpdate) {
   return {
@@ -14,6 +14,14 @@ function updatePath(path, noRouterUpdate) {
   }
 }
 
+function replacePath(path) {
+  return {
+    type: UPDATE_PATH,
+    path: path,
+    replaceState: true
+  }
+}
+
 // Reducer
 
 const initialState = typeof window === 'undefined' ? {} : {
@@ -24,7 +32,8 @@ function update(state=initialState, action) {
   if(action.type === UPDATE_PATH) {
     return Object.assign({}, state, {
       path: action.path,
-      noRouterUpdate: action.noRouterUpdate
+      noRouterUpdate: action.noRouterUpdate,
+      replaceState: action.replaceState
     });
   }
   return state;
@@ -63,7 +72,12 @@ function syncReduxAndRouter(history, store, selectRouterState = SELECT_STATE) {
     // edge cases.
     if(routing.path !== locationToString(window.location) &&
        !routing.noRouterUpdate) {
-      history.pushState(null, routing.path);
+      if(routing.replaceState) {
+        history.replaceState(null, routing.path);
+      }
+      else {
+        history.pushState(null, routing.path);
+      }
     }
   });
 
@@ -76,6 +90,7 @@ function syncReduxAndRouter(history, store, selectRouterState = SELECT_STATE) {
 module.exports = {
   UPDATE_PATH,
   updatePath,
+  replacePath,
   syncReduxAndRouter,
   routeReducer: update,
 };