Immutable middleware cleanup (#385)

* Inline tiny-invariant and json-stringify-safe

* Remove unused deps

* Tweak immutable middleware docs typos

docs/api/getDefaultMiddleware.md

@@ -58,9 +58,7 @@ provide runtime checks for two common issues:
 - [`immutable-state-invariant`](./otherExports.md#createimmutablestateinvariantmiddleware): deeply compares
   state values for mutations. It can detect mutations in reducers during a dispatch, and also mutations that occur between
   dispatches (such as in a component or a selector). When a mutation is detected, it will throw an error and indicate the key
-  path for where the mutated value was detected in the state tree.
-
-  Forked from [`redux-immutable-state-invariant`](https://github.com/leoasis/redux-immutable-state-invariant)
+  path for where the mutated value was detected in the state tree. (Forked from [`redux-immutable-state-invariant`](https://github.com/leoasis/redux-immutable-state-invariant).)
 
 - [`serializable-state-invariant-middleware`](./otherExports.md#createserializablestateinvariantmiddleware): a custom middleware created specifically for use in Redux Toolkit. Similar in
   concept to `immutable-state-invariant`, but deeply checks your state tree and your actions for non-serializable values

docs/api/otherExports.md

@@ -11,7 +11,7 @@ Redux Toolkit exports some of its internal utilities, and re-exports additional
 
 ## Internal Exports
 
-### `createImmutalStateInvariantMiddleware`
+### `createImmutableStateInvariantMiddleware`
 
 Creates an instance of the `immutable-state-invariant` middleware described in [`getDefaultMiddleware`](./getDefaultMiddleware.md).
 

package.json

@@ -24,11 +24,10 @@
   "license": "MIT",
   "devDependencies": {
     "@microsoft/api-extractor": "^7.7.0",
-    "@types/invariant": "^2.2.31",
     "@types/jest": "^24.0.11",
     "@types/json-stringify-safe": "^5.0.0",
+    "@types/nanoid": "^2.1.0",
     "@types/node": "^10.14.4",
-    "@types/redux-immutable-state-invariant": "^2.1.1",
     "console-testing-library": "^0.3.1",
     "eslint-config-react-app": "^5.0.1",
     "invariant": "^2.2.4",
@@ -58,11 +57,9 @@
     "src"
   ],
   "dependencies": {
-    "@types/nanoid": "^2.1.0",
     "immer": "^4.0.1",
     "nanoid": "^2.1.11",
     "redux": "^4.0.0",
-    "redux-immutable-state-invariant": "^2.1.0",
     "redux-thunk": "^2.3.0",
     "reselect": "^4.0.0"
   },

src/immutableStateInvariantMiddleware.ts

@@ -1,18 +1,64 @@
-import invariant from 'invariant'
-import stringify from 'json-stringify-safe'
 import { Middleware } from 'redux'
 
-const BETWEEN_DISPATCHES_MESSAGE = [
-  'A state mutation was detected between dispatches, in the path `%s`.',
-  'This may cause incorrect behavior.',
-  '(http://redux.js.org/docs/Troubleshooting.html#never-mutate-reducer-arguments)'
-].join(' ')
+type EntryProcessor = (key: string, value: any) => any
 
-const INSIDE_DISPATCH_MESSAGE = [
-  'A state mutation was detected inside a dispatch, in the path: `%s`.',
-  'Take a look at the reducer(s) handling the action %s.',
-  '(http://redux.js.org/docs/Troubleshooting.html#never-mutate-reducer-arguments)'
-].join(' ')
+const isProduction: boolean = process.env.NODE_ENV === 'production'
+const prefix: string = 'Invariant failed'
+
+// Throw an error if the condition fails
+// Strip out error messages for production
+// > Not providing an inline default argument for message as the result is smaller
+function invariant(condition: any, message?: string) {
+  if (condition) {
+    return
+  }
+  // Condition not passed
+
+  // In production we strip the message but still throw
+  if (isProduction) {
+    throw new Error(prefix)
+  }
+
+  // When not in production we allow the message to pass through
+  // *This block will be removed in production builds*
+  throw new Error(`${prefix}: ${message || ''}`)
+}
+
+function stringify(
+  obj: any,
+  serializer?: EntryProcessor,
+  indent?: string | number,
+  decycler?: EntryProcessor
+): string {
+  return JSON.stringify(obj, getSerialize(serializer, decycler), indent)
+}
+
+function getSerialize(
+  serializer?: EntryProcessor,
+  decycler?: EntryProcessor
+): EntryProcessor {
+  let stack: any[] = [],
+    keys: any[] = []
+
+  if (!decycler)
+    decycler = function(_: string, value: any) {
+      if (stack[0] === value) return '[Circular ~]'
+      return (
+        '[Circular ~.' + keys.slice(0, stack.indexOf(value)).join('.') + ']'
+      )
+    }
+
+  return function(this: any, key: string, value: any) {
+    if (stack.length > 0) {
+      var thisPos = stack.indexOf(this)
+      ~thisPos ? stack.splice(thisPos + 1) : stack.push(this)
+      ~thisPos ? keys.splice(thisPos, Infinity, key) : keys.push(key)
+      if (~stack.indexOf(value)) value = decycler!.call(this, key, value)
+    } else stack.push(value)
+
+    return serializer == null ? value : serializer.call(this, key, value)
+  }
+}
 
 export function isImmutableDefault(value: unknown): boolean {
   return (
@@ -150,8 +196,11 @@ export function createImmutableStateInvariantMiddleware(
 
       invariant(
         !result.wasMutated,
-        BETWEEN_DISPATCHES_MESSAGE,
-        (result.path || []).join('.')
+        `A state mutation was detected between dispatches, in the path '${(
+          result.path || []
+        ).join(
+          '.'
+        )}'.  This may cause incorrect behavior. (http://redux.js.org/docs/Troubleshooting.html#never-mutate-reducer-arguments)`
       )
 
       const dispatchedAction = next(action)
@@ -164,9 +213,13 @@ export function createImmutableStateInvariantMiddleware(
       result.wasMutated &&
         invariant(
           !result.wasMutated,
-          INSIDE_DISPATCH_MESSAGE,
-          (result.path || []).join('.'),
-          stringify(action)
+          `A state mutation was detected inside a dispatch, in the path: ${(
+            result.path || []
+          ).join(
+            '.'
+          )}. Take a look at the reducer(s) handling the action ${stringify(
+            action
+          )}. (http://redux.js.org/docs/Troubleshooting.html#never-mutate-reducer-arguments)`
         )
 
       return dispatchedAction