Refactor StateBinding class with ObservableState interface.

2 files changed, 6 insertions, 119 deletions

diff --git a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt b/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
index 58cf86c6..a37f1ac9 100644
--- a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
+++ b/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
@@ -28,6 +28,7 @@ import org.reduxkotlin.applyMiddleware
 import org.reduxkotlin.createStore
 import org.reduxkotlin.createThunk
 import org.reduxkotlin.createThunkMiddleware
+import pl.treksoft.kvision.state.ObservableState
 
 interface RAction
 typealias ReducerFun<S, A> = (S, A) -> S
@@ -65,7 +66,7 @@ class ReduxStore<S : Any, A : RAction>(
     reducer: ReducerFun<S, A>,
     initialState: S,
     vararg middlewares: Middleware<S>
-) {
+) : ObservableState<S> {
     @Suppress("UNCHECKED_CAST")
     private val store: Store<S> = createStore({ s: S, a: Any ->
         if (a == ActionTypes.INIT || a == ActionTypes.REPLACE) {
@@ -75,11 +76,7 @@ class ReduxStore<S : Any, A : RAction>(
         }
     }, initialState, applyMiddleware(createThunkMiddleware(), *middlewares))
 
-    /**
-     * Returns the current state.
-     */
     fun getState(): S {
-        @Suppress("UNCHECKED_CAST")
         return store.getState()
     }
 
@@ -99,12 +96,10 @@ class ReduxStore<S : Any, A : RAction>(
         store.dispatch(thunk)
     }
 
-    /**
-     * Subscribes a client for the change state notifications.
-     */
-    fun subscribe(listener: (S) -> Unit): () -> Unit {
-        return store.subscribe {
-            listener(getState())
+    override fun subscribe(observer: (S) -> Unit) {
+        store.subscribe {
+            observer(getState())
         }
+        observer(getState())
     }
 }
diff --git a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt b/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt
deleted file mode 100644
index a980a79a..00000000
--- a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright (c) 2017-present Robert Jaros
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package pl.treksoft.kvision.redux
-
-import pl.treksoft.kvision.core.Container
-import pl.treksoft.kvision.core.Widget
-
-/**
- * A class which binds the redux store with the given container.
- *
- * @constructor Creates StateBinding which binds the redux store with the given container.
- * @param S redux state type
- * @param A redux action type
- * @param CONT container type
- * @param store a redux store
- * @param container a container
- * @param factory a function which re-creates the view based on the given state
- */
-class StateBinding<S : Any, A : RAction, CONT : Container, CONTENT>(
-    store: ReduxStore<S, A>,
-    private val container: CONT,
-    private val factory: (CONT.(S) -> CONTENT)
-) : Widget(setOf()) {
-
-    init {
-        update(store.getState())
-        store.subscribe { update(it) }
-    }
-
-    private var updateState: ((S, CONTENT) -> Unit)? = null
-    private var content: CONTENT? = null
-
-    /**
-     * Updates view from the current state.
-     */
-    @Suppress("ComplexMethod")
-    fun update(state: S) {
-        singleRender {
-            if (updateState == null || content == null) {
-                container.removeAll()
-                container.add(this)
-                content = container.factory(state)
-            } else {
-                content?.let {
-                    updateState?.invoke(state, it)
-                }
-            }
-        }
-    }
-
-    private fun setUpdateState(updateState: (S, CONTENT) -> Unit) {
-        this.updateState = updateState
-    }
-
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, A : RAction, CONT : Container> CONT.stateBinding(
-            store: ReduxStore<S, A>,
-            factory: (CONT.(S) -> Unit)
-        ): StateBinding<S, A, CONT, Unit> {
-            return StateBinding(store, this, factory)
-        }
-
-        /**
-         * DSL builder extension function for updateable redux content.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, A : RAction, CONT : Container, CONTENT> CONT.stateUpdate(
-            store: ReduxStore<S, A>,
-            factory: (CONT.(S) -> CONTENT)
-        ): Updateable<S, CONTENT> {
-            return Updateable(StateBinding(store, this, factory)::setUpdateState)
-        }
-    }
-}
-
-/**
- * A helper class for updateable redux content.
- */
-class Updateable<S : Any, CONTENT>(private val setUpdateState: ((S, CONTENT) -> Unit) -> Unit) {
-    infix fun updateWith(updateState: (S, CONTENT) -> Unit) {
-        setUpdateState(updateState)
-    }
-}